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-rw-r--r--builtin/am.c2521
1 files changed, 2521 insertions, 0 deletions
diff --git a/builtin/am.c b/builtin/am.c
new file mode 100644
index 0000000..9f084d5
--- /dev/null
+++ b/builtin/am.c
@@ -0,0 +1,2521 @@
+/*
+ * Builtin "git am"
+ *
+ * Based on git-am.sh by Junio C Hamano.
+ */
+#define USE_THE_INDEX_VARIABLE
+#include "builtin.h"
+#include "abspath.h"
+#include "advice.h"
+#include "config.h"
+#include "editor.h"
+#include "environment.h"
+#include "exec-cmd.h"
+#include "gettext.h"
+#include "hex.h"
+#include "parse-options.h"
+#include "dir.h"
+#include "run-command.h"
+#include "hook.h"
+#include "quote.h"
+#include "tempfile.h"
+#include "lockfile.h"
+#include "cache-tree.h"
+#include "refs.h"
+#include "commit.h"
+#include "diff.h"
+#include "diffcore.h"
+#include "unpack-trees.h"
+#include "branch.h"
+#include "object-name.h"
+#include "preload-index.h"
+#include "sequencer.h"
+#include "revision.h"
+#include "merge-recursive.h"
+#include "log-tree.h"
+#include "notes-utils.h"
+#include "rerere.h"
+#include "prompt.h"
+#include "mailinfo.h"
+#include "apply.h"
+#include "string-list.h"
+#include "packfile.h"
+#include "pager.h"
+#include "path.h"
+#include "repository.h"
+#include "pretty.h"
+
+/**
+ * Returns the length of the first line of msg.
+ */
+static int linelen(const char *msg)
+{
+ return strchrnul(msg, '\n') - msg;
+}
+
+/**
+ * Returns true if `str` consists of only whitespace, false otherwise.
+ */
+static int str_isspace(const char *str)
+{
+ for (; *str; str++)
+ if (!isspace(*str))
+ return 0;
+
+ return 1;
+}
+
+enum patch_format {
+ PATCH_FORMAT_UNKNOWN = 0,
+ PATCH_FORMAT_MBOX,
+ PATCH_FORMAT_STGIT,
+ PATCH_FORMAT_STGIT_SERIES,
+ PATCH_FORMAT_HG,
+ PATCH_FORMAT_MBOXRD
+};
+
+enum keep_type {
+ KEEP_FALSE = 0,
+ KEEP_TRUE, /* pass -k flag to git-mailinfo */
+ KEEP_NON_PATCH /* pass -b flag to git-mailinfo */
+};
+
+enum scissors_type {
+ SCISSORS_UNSET = -1,
+ SCISSORS_FALSE = 0, /* pass --no-scissors to git-mailinfo */
+ SCISSORS_TRUE /* pass --scissors to git-mailinfo */
+};
+
+enum signoff_type {
+ SIGNOFF_FALSE = 0,
+ SIGNOFF_TRUE = 1,
+ SIGNOFF_EXPLICIT /* --signoff was set on the command-line */
+};
+
+enum resume_type {
+ RESUME_FALSE = 0,
+ RESUME_APPLY,
+ RESUME_RESOLVED,
+ RESUME_SKIP,
+ RESUME_ABORT,
+ RESUME_QUIT,
+ RESUME_SHOW_PATCH_RAW,
+ RESUME_SHOW_PATCH_DIFF,
+ RESUME_ALLOW_EMPTY,
+};
+
+enum empty_action {
+ STOP_ON_EMPTY_COMMIT = 0, /* output errors and stop in the middle of an am session */
+ DROP_EMPTY_COMMIT, /* skip with a notice message, unless "--quiet" has been passed */
+ KEEP_EMPTY_COMMIT, /* keep recording as empty commits */
+};
+
+struct am_state {
+ /* state directory path */
+ char *dir;
+
+ /* current and last patch numbers, 1-indexed */
+ int cur;
+ int last;
+
+ /* commit metadata and message */
+ char *author_name;
+ char *author_email;
+ char *author_date;
+ char *msg;
+ size_t msg_len;
+
+ /* when --rebasing, records the original commit the patch came from */
+ struct object_id orig_commit;
+
+ /* number of digits in patch filename */
+ int prec;
+
+ /* various operating modes and command line options */
+ int interactive;
+ int no_verify;
+ int threeway;
+ int quiet;
+ int signoff; /* enum signoff_type */
+ int utf8;
+ int keep; /* enum keep_type */
+ int message_id;
+ int scissors; /* enum scissors_type */
+ int quoted_cr; /* enum quoted_cr_action */
+ int empty_type; /* enum empty_action */
+ struct strvec git_apply_opts;
+ const char *resolvemsg;
+ int committer_date_is_author_date;
+ int ignore_date;
+ int allow_rerere_autoupdate;
+ const char *sign_commit;
+ int rebasing;
+};
+
+/**
+ * Initializes am_state with the default values.
+ */
+static void am_state_init(struct am_state *state)
+{
+ int gpgsign;
+
+ memset(state, 0, sizeof(*state));
+
+ state->dir = git_pathdup("rebase-apply");
+
+ state->prec = 4;
+
+ git_config_get_bool("am.threeway", &state->threeway);
+
+ state->utf8 = 1;
+
+ git_config_get_bool("am.messageid", &state->message_id);
+
+ state->scissors = SCISSORS_UNSET;
+ state->quoted_cr = quoted_cr_unset;
+
+ strvec_init(&state->git_apply_opts);
+
+ if (!git_config_get_bool("commit.gpgsign", &gpgsign))
+ state->sign_commit = gpgsign ? "" : NULL;
+}
+
+/**
+ * Releases memory allocated by an am_state.
+ */
+static void am_state_release(struct am_state *state)
+{
+ free(state->dir);
+ free(state->author_name);
+ free(state->author_email);
+ free(state->author_date);
+ free(state->msg);
+ strvec_clear(&state->git_apply_opts);
+}
+
+static int am_option_parse_quoted_cr(const struct option *opt,
+ const char *arg, int unset)
+{
+ BUG_ON_OPT_NEG(unset);
+
+ if (mailinfo_parse_quoted_cr_action(arg, opt->value) != 0)
+ return error(_("bad action '%s' for '%s'"), arg, "--quoted-cr");
+ return 0;
+}
+
+static int am_option_parse_empty(const struct option *opt,
+ const char *arg, int unset)
+{
+ int *opt_value = opt->value;
+
+ BUG_ON_OPT_NEG(unset);
+
+ if (!strcmp(arg, "stop"))
+ *opt_value = STOP_ON_EMPTY_COMMIT;
+ else if (!strcmp(arg, "drop"))
+ *opt_value = DROP_EMPTY_COMMIT;
+ else if (!strcmp(arg, "keep"))
+ *opt_value = KEEP_EMPTY_COMMIT;
+ else
+ return error(_("invalid value for '%s': '%s'"), "--empty", arg);
+
+ return 0;
+}
+
+/**
+ * Returns path relative to the am_state directory.
+ */
+static inline const char *am_path(const struct am_state *state, const char *path)
+{
+ return mkpath("%s/%s", state->dir, path);
+}
+
+/**
+ * For convenience to call write_file()
+ */
+static void write_state_text(const struct am_state *state,
+ const char *name, const char *string)
+{
+ write_file(am_path(state, name), "%s", string);
+}
+
+static void write_state_count(const struct am_state *state,
+ const char *name, int value)
+{
+ write_file(am_path(state, name), "%d", value);
+}
+
+static void write_state_bool(const struct am_state *state,
+ const char *name, int value)
+{
+ write_state_text(state, name, value ? "t" : "f");
+}
+
+/**
+ * If state->quiet is false, calls fprintf(fp, fmt, ...), and appends a newline
+ * at the end.
+ */
+__attribute__((format (printf, 3, 4)))
+static void say(const struct am_state *state, FILE *fp, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ if (!state->quiet) {
+ vfprintf(fp, fmt, ap);
+ putc('\n', fp);
+ }
+ va_end(ap);
+}
+
+/**
+ * Returns 1 if there is an am session in progress, 0 otherwise.
+ */
+static int am_in_progress(const struct am_state *state)
+{
+ struct stat st;
+
+ if (lstat(state->dir, &st) < 0 || !S_ISDIR(st.st_mode))
+ return 0;
+ if (lstat(am_path(state, "last"), &st) || !S_ISREG(st.st_mode))
+ return 0;
+ if (lstat(am_path(state, "next"), &st) || !S_ISREG(st.st_mode))
+ return 0;
+ return 1;
+}
+
+/**
+ * Reads the contents of `file` in the `state` directory into `sb`. Returns the
+ * number of bytes read on success, -1 if the file does not exist. If `trim` is
+ * set, trailing whitespace will be removed.
+ */
+static int read_state_file(struct strbuf *sb, const struct am_state *state,
+ const char *file, int trim)
+{
+ strbuf_reset(sb);
+
+ if (strbuf_read_file(sb, am_path(state, file), 0) >= 0) {
+ if (trim)
+ strbuf_trim(sb);
+
+ return sb->len;
+ }
+
+ if (errno == ENOENT)
+ return -1;
+
+ die_errno(_("could not read '%s'"), am_path(state, file));
+}
+
+/**
+ * Reads and parses the state directory's "author-script" file, and sets
+ * state->author_name, state->author_email and state->author_date accordingly.
+ * Returns 0 on success, -1 if the file could not be parsed.
+ *
+ * The author script is of the format:
+ *
+ * GIT_AUTHOR_NAME='$author_name'
+ * GIT_AUTHOR_EMAIL='$author_email'
+ * GIT_AUTHOR_DATE='$author_date'
+ *
+ * where $author_name, $author_email and $author_date are quoted. We are strict
+ * with our parsing, as the file was meant to be eval'd in the old git-am.sh
+ * script, and thus if the file differs from what this function expects, it is
+ * better to bail out than to do something that the user does not expect.
+ */
+static int read_am_author_script(struct am_state *state)
+{
+ const char *filename = am_path(state, "author-script");
+
+ assert(!state->author_name);
+ assert(!state->author_email);
+ assert(!state->author_date);
+
+ return read_author_script(filename, &state->author_name,
+ &state->author_email, &state->author_date, 1);
+}
+
+/**
+ * Saves state->author_name, state->author_email and state->author_date in the
+ * state directory's "author-script" file.
+ */
+static void write_author_script(const struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ strbuf_addstr(&sb, "GIT_AUTHOR_NAME=");
+ sq_quote_buf(&sb, state->author_name);
+ strbuf_addch(&sb, '\n');
+
+ strbuf_addstr(&sb, "GIT_AUTHOR_EMAIL=");
+ sq_quote_buf(&sb, state->author_email);
+ strbuf_addch(&sb, '\n');
+
+ strbuf_addstr(&sb, "GIT_AUTHOR_DATE=");
+ sq_quote_buf(&sb, state->author_date);
+ strbuf_addch(&sb, '\n');
+
+ write_state_text(state, "author-script", sb.buf);
+
+ strbuf_release(&sb);
+}
+
+/**
+ * Reads the commit message from the state directory's "final-commit" file,
+ * setting state->msg to its contents and state->msg_len to the length of its
+ * contents in bytes.
+ *
+ * Returns 0 on success, -1 if the file does not exist.
+ */
+static int read_commit_msg(struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ assert(!state->msg);
+
+ if (read_state_file(&sb, state, "final-commit", 0) < 0) {
+ strbuf_release(&sb);
+ return -1;
+ }
+
+ state->msg = strbuf_detach(&sb, &state->msg_len);
+ return 0;
+}
+
+/**
+ * Saves state->msg in the state directory's "final-commit" file.
+ */
+static void write_commit_msg(const struct am_state *state)
+{
+ const char *filename = am_path(state, "final-commit");
+ write_file_buf(filename, state->msg, state->msg_len);
+}
+
+/**
+ * Loads state from disk.
+ */
+static void am_load(struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ if (read_state_file(&sb, state, "next", 1) < 0)
+ BUG("state file 'next' does not exist");
+ state->cur = strtol(sb.buf, NULL, 10);
+
+ if (read_state_file(&sb, state, "last", 1) < 0)
+ BUG("state file 'last' does not exist");
+ state->last = strtol(sb.buf, NULL, 10);
+
+ if (read_am_author_script(state) < 0)
+ die(_("could not parse author script"));
+
+ read_commit_msg(state);
+
+ if (read_state_file(&sb, state, "original-commit", 1) < 0)
+ oidclr(&state->orig_commit);
+ else if (get_oid_hex(sb.buf, &state->orig_commit) < 0)
+ die(_("could not parse %s"), am_path(state, "original-commit"));
+
+ read_state_file(&sb, state, "threeway", 1);
+ state->threeway = !strcmp(sb.buf, "t");
+
+ read_state_file(&sb, state, "quiet", 1);
+ state->quiet = !strcmp(sb.buf, "t");
+
+ read_state_file(&sb, state, "sign", 1);
+ state->signoff = !strcmp(sb.buf, "t");
+
+ read_state_file(&sb, state, "utf8", 1);
+ state->utf8 = !strcmp(sb.buf, "t");
+
+ if (file_exists(am_path(state, "rerere-autoupdate"))) {
+ read_state_file(&sb, state, "rerere-autoupdate", 1);
+ state->allow_rerere_autoupdate = strcmp(sb.buf, "t") ?
+ RERERE_NOAUTOUPDATE : RERERE_AUTOUPDATE;
+ } else {
+ state->allow_rerere_autoupdate = 0;
+ }
+
+ read_state_file(&sb, state, "keep", 1);
+ if (!strcmp(sb.buf, "t"))
+ state->keep = KEEP_TRUE;
+ else if (!strcmp(sb.buf, "b"))
+ state->keep = KEEP_NON_PATCH;
+ else
+ state->keep = KEEP_FALSE;
+
+ read_state_file(&sb, state, "messageid", 1);
+ state->message_id = !strcmp(sb.buf, "t");
+
+ read_state_file(&sb, state, "scissors", 1);
+ if (!strcmp(sb.buf, "t"))
+ state->scissors = SCISSORS_TRUE;
+ else if (!strcmp(sb.buf, "f"))
+ state->scissors = SCISSORS_FALSE;
+ else
+ state->scissors = SCISSORS_UNSET;
+
+ read_state_file(&sb, state, "quoted-cr", 1);
+ if (!*sb.buf)
+ state->quoted_cr = quoted_cr_unset;
+ else if (mailinfo_parse_quoted_cr_action(sb.buf, &state->quoted_cr) != 0)
+ die(_("could not parse %s"), am_path(state, "quoted-cr"));
+
+ read_state_file(&sb, state, "apply-opt", 1);
+ strvec_clear(&state->git_apply_opts);
+ if (sq_dequote_to_strvec(sb.buf, &state->git_apply_opts) < 0)
+ die(_("could not parse %s"), am_path(state, "apply-opt"));
+
+ state->rebasing = !!file_exists(am_path(state, "rebasing"));
+
+ strbuf_release(&sb);
+}
+
+/**
+ * Removes the am_state directory, forcefully terminating the current am
+ * session.
+ */
+static void am_destroy(const struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ strbuf_addstr(&sb, state->dir);
+ remove_dir_recursively(&sb, 0);
+ strbuf_release(&sb);
+}
+
+/**
+ * Runs applypatch-msg hook. Returns its exit code.
+ */
+static int run_applypatch_msg_hook(struct am_state *state)
+{
+ int ret = 0;
+
+ assert(state->msg);
+
+ if (!state->no_verify)
+ ret = run_hooks_l("applypatch-msg", am_path(state, "final-commit"), NULL);
+
+ if (!ret) {
+ FREE_AND_NULL(state->msg);
+ if (read_commit_msg(state) < 0)
+ die(_("'%s' was deleted by the applypatch-msg hook"),
+ am_path(state, "final-commit"));
+ }
+
+ return ret;
+}
+
+/**
+ * Runs post-rewrite hook. Returns it exit code.
+ */
+static int run_post_rewrite_hook(const struct am_state *state)
+{
+ struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT;
+
+ strvec_push(&opt.args, "rebase");
+ opt.path_to_stdin = am_path(state, "rewritten");
+
+ return run_hooks_opt("post-rewrite", &opt);
+}
+
+/**
+ * Reads the state directory's "rewritten" file, and copies notes from the old
+ * commits listed in the file to their rewritten commits.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int copy_notes_for_rebase(const struct am_state *state)
+{
+ struct notes_rewrite_cfg *c;
+ struct strbuf sb = STRBUF_INIT;
+ const char *invalid_line = _("Malformed input line: '%s'.");
+ const char *msg = "Notes added by 'git rebase'";
+ FILE *fp;
+ int ret = 0;
+
+ assert(state->rebasing);
+
+ c = init_copy_notes_for_rewrite("rebase");
+ if (!c)
+ return 0;
+
+ fp = xfopen(am_path(state, "rewritten"), "r");
+
+ while (!strbuf_getline_lf(&sb, fp)) {
+ struct object_id from_obj, to_obj;
+ const char *p;
+
+ if (sb.len != the_hash_algo->hexsz * 2 + 1) {
+ ret = error(invalid_line, sb.buf);
+ goto finish;
+ }
+
+ if (parse_oid_hex(sb.buf, &from_obj, &p)) {
+ ret = error(invalid_line, sb.buf);
+ goto finish;
+ }
+
+ if (*p != ' ') {
+ ret = error(invalid_line, sb.buf);
+ goto finish;
+ }
+
+ if (get_oid_hex(p + 1, &to_obj)) {
+ ret = error(invalid_line, sb.buf);
+ goto finish;
+ }
+
+ if (copy_note_for_rewrite(c, &from_obj, &to_obj))
+ ret = error(_("Failed to copy notes from '%s' to '%s'"),
+ oid_to_hex(&from_obj), oid_to_hex(&to_obj));
+ }
+
+finish:
+ finish_copy_notes_for_rewrite(the_repository, c, msg);
+ fclose(fp);
+ strbuf_release(&sb);
+ return ret;
+}
+
+/**
+ * Determines if the file looks like a piece of RFC2822 mail by grabbing all
+ * non-indented lines and checking if they look like they begin with valid
+ * header field names.
+ *
+ * Returns 1 if the file looks like a piece of mail, 0 otherwise.
+ */
+static int is_mail(FILE *fp)
+{
+ const char *header_regex = "^[!-9;-~]+:";
+ struct strbuf sb = STRBUF_INIT;
+ regex_t regex;
+ int ret = 1;
+
+ if (fseek(fp, 0L, SEEK_SET))
+ die_errno(_("fseek failed"));
+
+ if (regcomp(&regex, header_regex, REG_NOSUB | REG_EXTENDED))
+ die("invalid pattern: %s", header_regex);
+
+ while (!strbuf_getline(&sb, fp)) {
+ if (!sb.len)
+ break; /* End of header */
+
+ /* Ignore indented folded lines */
+ if (*sb.buf == '\t' || *sb.buf == ' ')
+ continue;
+
+ /* It's a header if it matches header_regex */
+ if (regexec(&regex, sb.buf, 0, NULL, 0)) {
+ ret = 0;
+ goto done;
+ }
+ }
+
+done:
+ regfree(&regex);
+ strbuf_release(&sb);
+ return ret;
+}
+
+/**
+ * Attempts to detect the patch_format of the patches contained in `paths`,
+ * returning the PATCH_FORMAT_* enum value. Returns PATCH_FORMAT_UNKNOWN if
+ * detection fails.
+ */
+static int detect_patch_format(const char **paths)
+{
+ enum patch_format ret = PATCH_FORMAT_UNKNOWN;
+ struct strbuf l1 = STRBUF_INIT;
+ struct strbuf l2 = STRBUF_INIT;
+ struct strbuf l3 = STRBUF_INIT;
+ FILE *fp;
+
+ /*
+ * We default to mbox format if input is from stdin and for directories
+ */
+ if (!*paths || !strcmp(*paths, "-") || is_directory(*paths))
+ return PATCH_FORMAT_MBOX;
+
+ /*
+ * Otherwise, check the first few lines of the first patch, starting
+ * from the first non-blank line, to try to detect its format.
+ */
+
+ fp = xfopen(*paths, "r");
+
+ while (!strbuf_getline(&l1, fp)) {
+ if (l1.len)
+ break;
+ }
+
+ if (starts_with(l1.buf, "From ") || starts_with(l1.buf, "From: ")) {
+ ret = PATCH_FORMAT_MBOX;
+ goto done;
+ }
+
+ if (starts_with(l1.buf, "# This series applies on GIT commit")) {
+ ret = PATCH_FORMAT_STGIT_SERIES;
+ goto done;
+ }
+
+ if (!strcmp(l1.buf, "# HG changeset patch")) {
+ ret = PATCH_FORMAT_HG;
+ goto done;
+ }
+
+ strbuf_getline(&l2, fp);
+ strbuf_getline(&l3, fp);
+
+ /*
+ * If the second line is empty and the third is a From, Author or Date
+ * entry, this is likely an StGit patch.
+ */
+ if (l1.len && !l2.len &&
+ (starts_with(l3.buf, "From:") ||
+ starts_with(l3.buf, "Author:") ||
+ starts_with(l3.buf, "Date:"))) {
+ ret = PATCH_FORMAT_STGIT;
+ goto done;
+ }
+
+ if (l1.len && is_mail(fp)) {
+ ret = PATCH_FORMAT_MBOX;
+ goto done;
+ }
+
+done:
+ fclose(fp);
+ strbuf_release(&l1);
+ strbuf_release(&l2);
+ strbuf_release(&l3);
+ return ret;
+}
+
+/**
+ * Splits out individual email patches from `paths`, where each path is either
+ * a mbox file or a Maildir. Returns 0 on success, -1 on failure.
+ */
+static int split_mail_mbox(struct am_state *state, const char **paths,
+ int keep_cr, int mboxrd)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+ struct strbuf last = STRBUF_INIT;
+ int ret;
+
+ cp.git_cmd = 1;
+ strvec_push(&cp.args, "mailsplit");
+ strvec_pushf(&cp.args, "-d%d", state->prec);
+ strvec_pushf(&cp.args, "-o%s", state->dir);
+ strvec_push(&cp.args, "-b");
+ if (keep_cr)
+ strvec_push(&cp.args, "--keep-cr");
+ if (mboxrd)
+ strvec_push(&cp.args, "--mboxrd");
+ strvec_push(&cp.args, "--");
+ strvec_pushv(&cp.args, paths);
+
+ ret = capture_command(&cp, &last, 8);
+ if (ret)
+ goto exit;
+
+ state->cur = 1;
+ state->last = strtol(last.buf, NULL, 10);
+
+exit:
+ strbuf_release(&last);
+ return ret ? -1 : 0;
+}
+
+/**
+ * Callback signature for split_mail_conv(). The foreign patch should be
+ * read from `in`, and the converted patch (in RFC2822 mail format) should be
+ * written to `out`. Return 0 on success, or -1 on failure.
+ */
+typedef int (*mail_conv_fn)(FILE *out, FILE *in, int keep_cr);
+
+/**
+ * Calls `fn` for each file in `paths` to convert the foreign patch to the
+ * RFC2822 mail format suitable for parsing with git-mailinfo.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int split_mail_conv(mail_conv_fn fn, struct am_state *state,
+ const char **paths, int keep_cr)
+{
+ static const char *stdin_only[] = {"-", NULL};
+ int i;
+
+ if (!*paths)
+ paths = stdin_only;
+
+ for (i = 0; *paths; paths++, i++) {
+ FILE *in, *out;
+ const char *mail;
+ int ret;
+
+ if (!strcmp(*paths, "-"))
+ in = stdin;
+ else
+ in = fopen(*paths, "r");
+
+ if (!in)
+ return error_errno(_("could not open '%s' for reading"),
+ *paths);
+
+ mail = mkpath("%s/%0*d", state->dir, state->prec, i + 1);
+
+ out = fopen(mail, "w");
+ if (!out) {
+ if (in != stdin)
+ fclose(in);
+ return error_errno(_("could not open '%s' for writing"),
+ mail);
+ }
+
+ ret = fn(out, in, keep_cr);
+
+ fclose(out);
+ if (in != stdin)
+ fclose(in);
+
+ if (ret)
+ return error(_("could not parse patch '%s'"), *paths);
+ }
+
+ state->cur = 1;
+ state->last = i;
+ return 0;
+}
+
+/**
+ * A split_mail_conv() callback that converts an StGit patch to an RFC2822
+ * message suitable for parsing with git-mailinfo.
+ */
+static int stgit_patch_to_mail(FILE *out, FILE *in, int keep_cr UNUSED)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int subject_printed = 0;
+
+ while (!strbuf_getline_lf(&sb, in)) {
+ const char *str;
+
+ if (str_isspace(sb.buf))
+ continue;
+ else if (skip_prefix(sb.buf, "Author:", &str))
+ fprintf(out, "From:%s\n", str);
+ else if (starts_with(sb.buf, "From") || starts_with(sb.buf, "Date"))
+ fprintf(out, "%s\n", sb.buf);
+ else if (!subject_printed) {
+ fprintf(out, "Subject: %s\n", sb.buf);
+ subject_printed = 1;
+ } else {
+ fprintf(out, "\n%s\n", sb.buf);
+ break;
+ }
+ }
+
+ strbuf_reset(&sb);
+ while (strbuf_fread(&sb, 8192, in) > 0) {
+ fwrite(sb.buf, 1, sb.len, out);
+ strbuf_reset(&sb);
+ }
+
+ strbuf_release(&sb);
+ return 0;
+}
+
+/**
+ * This function only supports a single StGit series file in `paths`.
+ *
+ * Given an StGit series file, converts the StGit patches in the series into
+ * RFC2822 messages suitable for parsing with git-mailinfo, and queues them in
+ * the state directory.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int split_mail_stgit_series(struct am_state *state, const char **paths,
+ int keep_cr)
+{
+ const char *series_dir;
+ char *series_dir_buf;
+ FILE *fp;
+ struct strvec patches = STRVEC_INIT;
+ struct strbuf sb = STRBUF_INIT;
+ int ret;
+
+ if (!paths[0] || paths[1])
+ return error(_("Only one StGIT patch series can be applied at once"));
+
+ series_dir_buf = xstrdup(*paths);
+ series_dir = dirname(series_dir_buf);
+
+ fp = fopen(*paths, "r");
+ if (!fp)
+ return error_errno(_("could not open '%s' for reading"), *paths);
+
+ while (!strbuf_getline_lf(&sb, fp)) {
+ if (*sb.buf == '#')
+ continue; /* skip comment lines */
+
+ strvec_push(&patches, mkpath("%s/%s", series_dir, sb.buf));
+ }
+
+ fclose(fp);
+ strbuf_release(&sb);
+ free(series_dir_buf);
+
+ ret = split_mail_conv(stgit_patch_to_mail, state, patches.v, keep_cr);
+
+ strvec_clear(&patches);
+ return ret;
+}
+
+/**
+ * A split_patches_conv() callback that converts a mercurial patch to a RFC2822
+ * message suitable for parsing with git-mailinfo.
+ */
+static int hg_patch_to_mail(FILE *out, FILE *in, int keep_cr UNUSED)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int rc = 0;
+
+ while (!strbuf_getline_lf(&sb, in)) {
+ const char *str;
+
+ if (skip_prefix(sb.buf, "# User ", &str))
+ fprintf(out, "From: %s\n", str);
+ else if (skip_prefix(sb.buf, "# Date ", &str)) {
+ timestamp_t timestamp;
+ long tz, tz2;
+ char *end;
+
+ errno = 0;
+ timestamp = parse_timestamp(str, &end, 10);
+ if (errno) {
+ rc = error(_("invalid timestamp"));
+ goto exit;
+ }
+
+ if (!skip_prefix(end, " ", &str)) {
+ rc = error(_("invalid Date line"));
+ goto exit;
+ }
+
+ errno = 0;
+ tz = strtol(str, &end, 10);
+ if (errno) {
+ rc = error(_("invalid timezone offset"));
+ goto exit;
+ }
+
+ if (*end) {
+ rc = error(_("invalid Date line"));
+ goto exit;
+ }
+
+ /*
+ * mercurial's timezone is in seconds west of UTC,
+ * however git's timezone is in hours + minutes east of
+ * UTC. Convert it.
+ */
+ tz2 = labs(tz) / 3600 * 100 + labs(tz) % 3600 / 60;
+ if (tz > 0)
+ tz2 = -tz2;
+
+ fprintf(out, "Date: %s\n", show_date(timestamp, tz2, DATE_MODE(RFC2822)));
+ } else if (starts_with(sb.buf, "# ")) {
+ continue;
+ } else {
+ fprintf(out, "\n%s\n", sb.buf);
+ break;
+ }
+ }
+
+ strbuf_reset(&sb);
+ while (strbuf_fread(&sb, 8192, in) > 0) {
+ fwrite(sb.buf, 1, sb.len, out);
+ strbuf_reset(&sb);
+ }
+exit:
+ strbuf_release(&sb);
+ return rc;
+}
+
+/**
+ * Splits a list of files/directories into individual email patches. Each path
+ * in `paths` must be a file/directory that is formatted according to
+ * `patch_format`.
+ *
+ * Once split out, the individual email patches will be stored in the state
+ * directory, with each patch's filename being its index, padded to state->prec
+ * digits.
+ *
+ * state->cur will be set to the index of the first mail, and state->last will
+ * be set to the index of the last mail.
+ *
+ * Set keep_cr to 0 to convert all lines ending with \r\n to end with \n, 1
+ * to disable this behavior, -1 to use the default configured setting.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int split_mail(struct am_state *state, enum patch_format patch_format,
+ const char **paths, int keep_cr)
+{
+ if (keep_cr < 0) {
+ keep_cr = 0;
+ git_config_get_bool("am.keepcr", &keep_cr);
+ }
+
+ switch (patch_format) {
+ case PATCH_FORMAT_MBOX:
+ return split_mail_mbox(state, paths, keep_cr, 0);
+ case PATCH_FORMAT_STGIT:
+ return split_mail_conv(stgit_patch_to_mail, state, paths, keep_cr);
+ case PATCH_FORMAT_STGIT_SERIES:
+ return split_mail_stgit_series(state, paths, keep_cr);
+ case PATCH_FORMAT_HG:
+ return split_mail_conv(hg_patch_to_mail, state, paths, keep_cr);
+ case PATCH_FORMAT_MBOXRD:
+ return split_mail_mbox(state, paths, keep_cr, 1);
+ default:
+ BUG("invalid patch_format");
+ }
+ return -1;
+}
+
+/**
+ * Setup a new am session for applying patches
+ */
+static void am_setup(struct am_state *state, enum patch_format patch_format,
+ const char **paths, int keep_cr)
+{
+ struct object_id curr_head;
+ const char *str;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (!patch_format)
+ patch_format = detect_patch_format(paths);
+
+ if (!patch_format) {
+ fprintf_ln(stderr, _("Patch format detection failed."));
+ exit(128);
+ }
+
+ if (mkdir(state->dir, 0777) < 0 && errno != EEXIST)
+ die_errno(_("failed to create directory '%s'"), state->dir);
+ delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
+
+ if (split_mail(state, patch_format, paths, keep_cr) < 0) {
+ am_destroy(state);
+ die(_("Failed to split patches."));
+ }
+
+ if (state->rebasing)
+ state->threeway = 1;
+
+ write_state_bool(state, "threeway", state->threeway);
+ write_state_bool(state, "quiet", state->quiet);
+ write_state_bool(state, "sign", state->signoff);
+ write_state_bool(state, "utf8", state->utf8);
+
+ if (state->allow_rerere_autoupdate)
+ write_state_bool(state, "rerere-autoupdate",
+ state->allow_rerere_autoupdate == RERERE_AUTOUPDATE);
+
+ switch (state->keep) {
+ case KEEP_FALSE:
+ str = "f";
+ break;
+ case KEEP_TRUE:
+ str = "t";
+ break;
+ case KEEP_NON_PATCH:
+ str = "b";
+ break;
+ default:
+ BUG("invalid value for state->keep");
+ }
+
+ write_state_text(state, "keep", str);
+ write_state_bool(state, "messageid", state->message_id);
+
+ switch (state->scissors) {
+ case SCISSORS_UNSET:
+ str = "";
+ break;
+ case SCISSORS_FALSE:
+ str = "f";
+ break;
+ case SCISSORS_TRUE:
+ str = "t";
+ break;
+ default:
+ BUG("invalid value for state->scissors");
+ }
+ write_state_text(state, "scissors", str);
+
+ switch (state->quoted_cr) {
+ case quoted_cr_unset:
+ str = "";
+ break;
+ case quoted_cr_nowarn:
+ str = "nowarn";
+ break;
+ case quoted_cr_warn:
+ str = "warn";
+ break;
+ case quoted_cr_strip:
+ str = "strip";
+ break;
+ default:
+ BUG("invalid value for state->quoted_cr");
+ }
+ write_state_text(state, "quoted-cr", str);
+
+ sq_quote_argv(&sb, state->git_apply_opts.v);
+ write_state_text(state, "apply-opt", sb.buf);
+
+ if (state->rebasing)
+ write_state_text(state, "rebasing", "");
+ else
+ write_state_text(state, "applying", "");
+
+ if (!repo_get_oid(the_repository, "HEAD", &curr_head)) {
+ write_state_text(state, "abort-safety", oid_to_hex(&curr_head));
+ if (!state->rebasing)
+ update_ref("am", "ORIG_HEAD", &curr_head, NULL, 0,
+ UPDATE_REFS_DIE_ON_ERR);
+ } else {
+ write_state_text(state, "abort-safety", "");
+ if (!state->rebasing)
+ delete_ref(NULL, "ORIG_HEAD", NULL, 0);
+ }
+
+ /*
+ * NOTE: Since the "next" and "last" files determine if an am_state
+ * session is in progress, they should be written last.
+ */
+
+ write_state_count(state, "next", state->cur);
+ write_state_count(state, "last", state->last);
+
+ strbuf_release(&sb);
+}
+
+/**
+ * Increments the patch pointer, and cleans am_state for the application of the
+ * next patch.
+ */
+static void am_next(struct am_state *state)
+{
+ struct object_id head;
+
+ FREE_AND_NULL(state->author_name);
+ FREE_AND_NULL(state->author_email);
+ FREE_AND_NULL(state->author_date);
+ FREE_AND_NULL(state->msg);
+ state->msg_len = 0;
+
+ unlink(am_path(state, "author-script"));
+ unlink(am_path(state, "final-commit"));
+
+ oidclr(&state->orig_commit);
+ unlink(am_path(state, "original-commit"));
+ delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
+
+ if (!repo_get_oid(the_repository, "HEAD", &head))
+ write_state_text(state, "abort-safety", oid_to_hex(&head));
+ else
+ write_state_text(state, "abort-safety", "");
+
+ state->cur++;
+ write_state_count(state, "next", state->cur);
+}
+
+/**
+ * Returns the filename of the current patch email.
+ */
+static const char *msgnum(const struct am_state *state)
+{
+ static struct strbuf sb = STRBUF_INIT;
+
+ strbuf_reset(&sb);
+ strbuf_addf(&sb, "%0*d", state->prec, state->cur);
+
+ return sb.buf;
+}
+
+/**
+ * Dies with a user-friendly message on how to proceed after resolving the
+ * problem. This message can be overridden with state->resolvemsg.
+ */
+static void NORETURN die_user_resolve(const struct am_state *state)
+{
+ if (state->resolvemsg) {
+ printf_ln("%s", state->resolvemsg);
+ } else {
+ const char *cmdline = state->interactive ? "git am -i" : "git am";
+
+ printf_ln(_("When you have resolved this problem, run \"%s --continue\"."), cmdline);
+ printf_ln(_("If you prefer to skip this patch, run \"%s --skip\" instead."), cmdline);
+
+ if (advice_enabled(ADVICE_AM_WORK_DIR) &&
+ is_empty_or_missing_file(am_path(state, "patch")) &&
+ !repo_index_has_changes(the_repository, NULL, NULL))
+ printf_ln(_("To record the empty patch as an empty commit, run \"%s --allow-empty\"."), cmdline);
+
+ printf_ln(_("To restore the original branch and stop patching, run \"%s --abort\"."), cmdline);
+ }
+
+ exit(128);
+}
+
+/**
+ * Appends signoff to the "msg" field of the am_state.
+ */
+static void am_append_signoff(struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);
+ append_signoff(&sb, 0, 0);
+ state->msg = strbuf_detach(&sb, &state->msg_len);
+}
+
+/**
+ * Parses `mail` using git-mailinfo, extracting its patch and authorship info.
+ * state->msg will be set to the patch message. state->author_name,
+ * state->author_email and state->author_date will be set to the patch author's
+ * name, email and date respectively. The patch body will be written to the
+ * state directory's "patch" file.
+ *
+ * Returns 1 if the patch should be skipped, 0 otherwise.
+ */
+static int parse_mail(struct am_state *state, const char *mail)
+{
+ FILE *fp;
+ struct strbuf sb = STRBUF_INIT;
+ struct strbuf msg = STRBUF_INIT;
+ struct strbuf author_name = STRBUF_INIT;
+ struct strbuf author_date = STRBUF_INIT;
+ struct strbuf author_email = STRBUF_INIT;
+ int ret = 0;
+ struct mailinfo mi;
+
+ setup_mailinfo(&mi);
+
+ if (state->utf8)
+ mi.metainfo_charset = get_commit_output_encoding();
+ else
+ mi.metainfo_charset = NULL;
+
+ switch (state->keep) {
+ case KEEP_FALSE:
+ break;
+ case KEEP_TRUE:
+ mi.keep_subject = 1;
+ break;
+ case KEEP_NON_PATCH:
+ mi.keep_non_patch_brackets_in_subject = 1;
+ break;
+ default:
+ BUG("invalid value for state->keep");
+ }
+
+ if (state->message_id)
+ mi.add_message_id = 1;
+
+ switch (state->scissors) {
+ case SCISSORS_UNSET:
+ break;
+ case SCISSORS_FALSE:
+ mi.use_scissors = 0;
+ break;
+ case SCISSORS_TRUE:
+ mi.use_scissors = 1;
+ break;
+ default:
+ BUG("invalid value for state->scissors");
+ }
+
+ switch (state->quoted_cr) {
+ case quoted_cr_unset:
+ break;
+ case quoted_cr_nowarn:
+ case quoted_cr_warn:
+ case quoted_cr_strip:
+ mi.quoted_cr = state->quoted_cr;
+ break;
+ default:
+ BUG("invalid value for state->quoted_cr");
+ }
+
+ mi.input = xfopen(mail, "r");
+ mi.output = xfopen(am_path(state, "info"), "w");
+ if (mailinfo(&mi, am_path(state, "msg"), am_path(state, "patch")))
+ die("could not parse patch");
+
+ fclose(mi.input);
+ fclose(mi.output);
+
+ if (mi.format_flowed)
+ warning(_("Patch sent with format=flowed; "
+ "space at the end of lines might be lost."));
+
+ /* Extract message and author information */
+ fp = xfopen(am_path(state, "info"), "r");
+ while (!strbuf_getline_lf(&sb, fp)) {
+ const char *x;
+
+ if (skip_prefix(sb.buf, "Subject: ", &x)) {
+ if (msg.len)
+ strbuf_addch(&msg, '\n');
+ strbuf_addstr(&msg, x);
+ } else if (skip_prefix(sb.buf, "Author: ", &x))
+ strbuf_addstr(&author_name, x);
+ else if (skip_prefix(sb.buf, "Email: ", &x))
+ strbuf_addstr(&author_email, x);
+ else if (skip_prefix(sb.buf, "Date: ", &x))
+ strbuf_addstr(&author_date, x);
+ }
+ fclose(fp);
+
+ /* Skip pine's internal folder data */
+ if (!strcmp(author_name.buf, "Mail System Internal Data")) {
+ ret = 1;
+ goto finish;
+ }
+
+ strbuf_addstr(&msg, "\n\n");
+ strbuf_addbuf(&msg, &mi.log_message);
+ strbuf_stripspace(&msg, '\0');
+
+ assert(!state->author_name);
+ state->author_name = strbuf_detach(&author_name, NULL);
+
+ assert(!state->author_email);
+ state->author_email = strbuf_detach(&author_email, NULL);
+
+ assert(!state->author_date);
+ state->author_date = strbuf_detach(&author_date, NULL);
+
+ assert(!state->msg);
+ state->msg = strbuf_detach(&msg, &state->msg_len);
+
+finish:
+ strbuf_release(&msg);
+ strbuf_release(&author_date);
+ strbuf_release(&author_email);
+ strbuf_release(&author_name);
+ strbuf_release(&sb);
+ clear_mailinfo(&mi);
+ return ret;
+}
+
+/**
+ * Sets commit_id to the commit hash where the mail was generated from.
+ * Returns 0 on success, -1 on failure.
+ */
+static int get_mail_commit_oid(struct object_id *commit_id, const char *mail)
+{
+ struct strbuf sb = STRBUF_INIT;
+ FILE *fp = xfopen(mail, "r");
+ const char *x;
+ int ret = 0;
+
+ if (strbuf_getline_lf(&sb, fp) ||
+ !skip_prefix(sb.buf, "From ", &x) ||
+ get_oid_hex(x, commit_id) < 0)
+ ret = -1;
+
+ strbuf_release(&sb);
+ fclose(fp);
+ return ret;
+}
+
+/**
+ * Sets state->msg, state->author_name, state->author_email, state->author_date
+ * to the commit's respective info.
+ */
+static void get_commit_info(struct am_state *state, struct commit *commit)
+{
+ const char *buffer, *ident_line, *msg;
+ size_t ident_len;
+ struct ident_split id;
+
+ buffer = repo_logmsg_reencode(the_repository, commit, NULL,
+ get_commit_output_encoding());
+
+ ident_line = find_commit_header(buffer, "author", &ident_len);
+ if (!ident_line)
+ die(_("missing author line in commit %s"),
+ oid_to_hex(&commit->object.oid));
+ if (split_ident_line(&id, ident_line, ident_len) < 0)
+ die(_("invalid ident line: %.*s"), (int)ident_len, ident_line);
+
+ assert(!state->author_name);
+ if (id.name_begin)
+ state->author_name =
+ xmemdupz(id.name_begin, id.name_end - id.name_begin);
+ else
+ state->author_name = xstrdup("");
+
+ assert(!state->author_email);
+ if (id.mail_begin)
+ state->author_email =
+ xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
+ else
+ state->author_email = xstrdup("");
+
+ assert(!state->author_date);
+ state->author_date = xstrdup(show_ident_date(&id, DATE_MODE(NORMAL)));
+
+ assert(!state->msg);
+ msg = strstr(buffer, "\n\n");
+ if (!msg)
+ die(_("unable to parse commit %s"), oid_to_hex(&commit->object.oid));
+ state->msg = xstrdup(msg + 2);
+ state->msg_len = strlen(state->msg);
+ repo_unuse_commit_buffer(the_repository, commit, buffer);
+}
+
+/**
+ * Writes `commit` as a patch to the state directory's "patch" file.
+ */
+static void write_commit_patch(const struct am_state *state, struct commit *commit)
+{
+ struct rev_info rev_info;
+ FILE *fp;
+
+ fp = xfopen(am_path(state, "patch"), "w");
+ repo_init_revisions(the_repository, &rev_info, NULL);
+ rev_info.diff = 1;
+ rev_info.abbrev = 0;
+ rev_info.disable_stdin = 1;
+ rev_info.show_root_diff = 1;
+ rev_info.diffopt.output_format = DIFF_FORMAT_PATCH;
+ rev_info.no_commit_id = 1;
+ rev_info.diffopt.flags.binary = 1;
+ rev_info.diffopt.flags.full_index = 1;
+ rev_info.diffopt.use_color = 0;
+ rev_info.diffopt.file = fp;
+ rev_info.diffopt.close_file = 1;
+ add_pending_object(&rev_info, &commit->object, "");
+ diff_setup_done(&rev_info.diffopt);
+ log_tree_commit(&rev_info, commit);
+ release_revisions(&rev_info);
+}
+
+/**
+ * Writes the diff of the index against HEAD as a patch to the state
+ * directory's "patch" file.
+ */
+static void write_index_patch(const struct am_state *state)
+{
+ struct tree *tree;
+ struct object_id head;
+ struct rev_info rev_info;
+ FILE *fp;
+
+ if (!repo_get_oid(the_repository, "HEAD", &head)) {
+ struct commit *commit = lookup_commit_or_die(&head, "HEAD");
+ tree = repo_get_commit_tree(the_repository, commit);
+ } else
+ tree = lookup_tree(the_repository,
+ the_repository->hash_algo->empty_tree);
+
+ fp = xfopen(am_path(state, "patch"), "w");
+ repo_init_revisions(the_repository, &rev_info, NULL);
+ rev_info.diff = 1;
+ rev_info.disable_stdin = 1;
+ rev_info.no_commit_id = 1;
+ rev_info.diffopt.output_format = DIFF_FORMAT_PATCH;
+ rev_info.diffopt.use_color = 0;
+ rev_info.diffopt.file = fp;
+ rev_info.diffopt.close_file = 1;
+ add_pending_object(&rev_info, &tree->object, "");
+ diff_setup_done(&rev_info.diffopt);
+ run_diff_index(&rev_info, DIFF_INDEX_CACHED);
+ release_revisions(&rev_info);
+}
+
+/**
+ * Like parse_mail(), but parses the mail by looking up its commit ID
+ * directly. This is used in --rebasing mode to bypass git-mailinfo's munging
+ * of patches.
+ *
+ * state->orig_commit will be set to the original commit ID.
+ *
+ * Will always return 0 as the patch should never be skipped.
+ */
+static int parse_mail_rebase(struct am_state *state, const char *mail)
+{
+ struct commit *commit;
+ struct object_id commit_oid;
+
+ if (get_mail_commit_oid(&commit_oid, mail) < 0)
+ die(_("could not parse %s"), mail);
+
+ commit = lookup_commit_or_die(&commit_oid, mail);
+
+ get_commit_info(state, commit);
+
+ write_commit_patch(state, commit);
+
+ oidcpy(&state->orig_commit, &commit_oid);
+ write_state_text(state, "original-commit", oid_to_hex(&commit_oid));
+ update_ref("am", "REBASE_HEAD", &commit_oid,
+ NULL, REF_NO_DEREF, UPDATE_REFS_DIE_ON_ERR);
+
+ return 0;
+}
+
+/**
+ * Applies current patch with git-apply. Returns 0 on success, -1 otherwise. If
+ * `index_file` is not NULL, the patch will be applied to that index.
+ */
+static int run_apply(const struct am_state *state, const char *index_file)
+{
+ struct strvec apply_paths = STRVEC_INIT;
+ struct strvec apply_opts = STRVEC_INIT;
+ struct apply_state apply_state;
+ int res, opts_left;
+ int force_apply = 0;
+ int options = 0;
+ const char **apply_argv;
+
+ if (init_apply_state(&apply_state, the_repository, NULL))
+ BUG("init_apply_state() failed");
+
+ strvec_push(&apply_opts, "apply");
+ strvec_pushv(&apply_opts, state->git_apply_opts.v);
+
+ /*
+ * Build a copy that apply_parse_options() can rearrange.
+ * apply_opts.v keeps referencing the allocated strings for
+ * strvec_clear() to release.
+ */
+ DUP_ARRAY(apply_argv, apply_opts.v, apply_opts.nr);
+
+ opts_left = apply_parse_options(apply_opts.nr, apply_argv,
+ &apply_state, &force_apply, &options,
+ NULL);
+
+ if (opts_left != 0)
+ die("unknown option passed through to git apply");
+
+ if (index_file) {
+ apply_state.index_file = index_file;
+ apply_state.cached = 1;
+ } else
+ apply_state.check_index = 1;
+
+ /*
+ * If we are allowed to fall back on 3-way merge, don't give false
+ * errors during the initial attempt.
+ */
+ if (state->threeway && !index_file)
+ apply_state.apply_verbosity = verbosity_silent;
+
+ if (check_apply_state(&apply_state, force_apply))
+ BUG("check_apply_state() failed");
+
+ strvec_push(&apply_paths, am_path(state, "patch"));
+
+ res = apply_all_patches(&apply_state, apply_paths.nr, apply_paths.v, options);
+
+ strvec_clear(&apply_paths);
+ strvec_clear(&apply_opts);
+ clear_apply_state(&apply_state);
+ free(apply_argv);
+
+ if (res)
+ return res;
+
+ if (index_file) {
+ /* Reload index as apply_all_patches() will have modified it. */
+ discard_index(&the_index);
+ read_index_from(&the_index, index_file, get_git_dir());
+ }
+
+ return 0;
+}
+
+/**
+ * Builds an index that contains just the blobs needed for a 3way merge.
+ */
+static int build_fake_ancestor(const struct am_state *state, const char *index_file)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+
+ cp.git_cmd = 1;
+ strvec_push(&cp.args, "apply");
+ strvec_pushv(&cp.args, state->git_apply_opts.v);
+ strvec_pushf(&cp.args, "--build-fake-ancestor=%s", index_file);
+ strvec_push(&cp.args, am_path(state, "patch"));
+
+ if (run_command(&cp))
+ return -1;
+
+ return 0;
+}
+
+/**
+ * Attempt a threeway merge, using index_path as the temporary index.
+ */
+static int fall_back_threeway(const struct am_state *state, const char *index_path)
+{
+ struct object_id orig_tree, their_tree, our_tree;
+ const struct object_id *bases[1] = { &orig_tree };
+ struct merge_options o;
+ struct commit *result;
+ char *their_tree_name;
+
+ if (repo_get_oid(the_repository, "HEAD", &our_tree) < 0)
+ oidcpy(&our_tree, the_hash_algo->empty_tree);
+
+ if (build_fake_ancestor(state, index_path))
+ return error("could not build fake ancestor");
+
+ discard_index(&the_index);
+ read_index_from(&the_index, index_path, get_git_dir());
+
+ if (write_index_as_tree(&orig_tree, &the_index, index_path, 0, NULL))
+ return error(_("Repository lacks necessary blobs to fall back on 3-way merge."));
+
+ say(state, stdout, _("Using index info to reconstruct a base tree..."));
+
+ if (!state->quiet) {
+ /*
+ * List paths that needed 3-way fallback, so that the user can
+ * review them with extra care to spot mismerges.
+ */
+ struct rev_info rev_info;
+
+ repo_init_revisions(the_repository, &rev_info, NULL);
+ rev_info.diffopt.output_format = DIFF_FORMAT_NAME_STATUS;
+ rev_info.diffopt.filter |= diff_filter_bit('A');
+ rev_info.diffopt.filter |= diff_filter_bit('M');
+ add_pending_oid(&rev_info, "HEAD", &our_tree, 0);
+ diff_setup_done(&rev_info.diffopt);
+ run_diff_index(&rev_info, DIFF_INDEX_CACHED);
+ release_revisions(&rev_info);
+ }
+
+ if (run_apply(state, index_path))
+ return error(_("Did you hand edit your patch?\n"
+ "It does not apply to blobs recorded in its index."));
+
+ if (write_index_as_tree(&their_tree, &the_index, index_path, 0, NULL))
+ return error("could not write tree");
+
+ say(state, stdout, _("Falling back to patching base and 3-way merge..."));
+
+ discard_index(&the_index);
+ repo_read_index(the_repository);
+
+ /*
+ * This is not so wrong. Depending on which base we picked, orig_tree
+ * may be wildly different from ours, but their_tree has the same set of
+ * wildly different changes in parts the patch did not touch, so
+ * recursive ends up canceling them, saying that we reverted all those
+ * changes.
+ */
+
+ init_merge_options(&o, the_repository);
+
+ o.branch1 = "HEAD";
+ their_tree_name = xstrfmt("%.*s", linelen(state->msg), state->msg);
+ o.branch2 = their_tree_name;
+ o.detect_directory_renames = MERGE_DIRECTORY_RENAMES_NONE;
+
+ if (state->quiet)
+ o.verbosity = 0;
+
+ if (merge_recursive_generic(&o, &our_tree, &their_tree, 1, bases, &result)) {
+ repo_rerere(the_repository, state->allow_rerere_autoupdate);
+ free(their_tree_name);
+ return error(_("Failed to merge in the changes."));
+ }
+
+ free(their_tree_name);
+ return 0;
+}
+
+/**
+ * Commits the current index with state->msg as the commit message and
+ * state->author_name, state->author_email and state->author_date as the author
+ * information.
+ */
+static void do_commit(const struct am_state *state)
+{
+ struct object_id tree, parent, commit;
+ const struct object_id *old_oid;
+ struct commit_list *parents = NULL;
+ const char *reflog_msg, *author, *committer = NULL;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (!state->no_verify && run_hooks("pre-applypatch"))
+ exit(1);
+
+ if (write_index_as_tree(&tree, &the_index, get_index_file(), 0, NULL))
+ die(_("git write-tree failed to write a tree"));
+
+ if (!repo_get_oid_commit(the_repository, "HEAD", &parent)) {
+ old_oid = &parent;
+ commit_list_insert(lookup_commit(the_repository, &parent),
+ &parents);
+ } else {
+ old_oid = NULL;
+ say(state, stderr, _("applying to an empty history"));
+ }
+
+ author = fmt_ident(state->author_name, state->author_email,
+ WANT_AUTHOR_IDENT,
+ state->ignore_date ? NULL : state->author_date,
+ IDENT_STRICT);
+
+ if (state->committer_date_is_author_date)
+ committer = fmt_ident(getenv("GIT_COMMITTER_NAME"),
+ getenv("GIT_COMMITTER_EMAIL"),
+ WANT_COMMITTER_IDENT,
+ state->ignore_date ? NULL
+ : state->author_date,
+ IDENT_STRICT);
+
+ if (commit_tree_extended(state->msg, state->msg_len, &tree, parents,
+ &commit, author, committer, state->sign_commit,
+ NULL))
+ die(_("failed to write commit object"));
+
+ reflog_msg = getenv("GIT_REFLOG_ACTION");
+ if (!reflog_msg)
+ reflog_msg = "am";
+
+ strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg),
+ state->msg);
+
+ update_ref(sb.buf, "HEAD", &commit, old_oid, 0,
+ UPDATE_REFS_DIE_ON_ERR);
+
+ if (state->rebasing) {
+ FILE *fp = xfopen(am_path(state, "rewritten"), "a");
+
+ assert(!is_null_oid(&state->orig_commit));
+ fprintf(fp, "%s ", oid_to_hex(&state->orig_commit));
+ fprintf(fp, "%s\n", oid_to_hex(&commit));
+ fclose(fp);
+ }
+
+ run_hooks("post-applypatch");
+
+ strbuf_release(&sb);
+}
+
+/**
+ * Validates the am_state for resuming -- the "msg" and authorship fields must
+ * be filled up.
+ */
+static void validate_resume_state(const struct am_state *state)
+{
+ if (!state->msg)
+ die(_("cannot resume: %s does not exist."),
+ am_path(state, "final-commit"));
+
+ if (!state->author_name || !state->author_email || !state->author_date)
+ die(_("cannot resume: %s does not exist."),
+ am_path(state, "author-script"));
+}
+
+/**
+ * Interactively prompt the user on whether the current patch should be
+ * applied.
+ *
+ * Returns 0 if the user chooses to apply the patch, 1 if the user chooses to
+ * skip it.
+ */
+static int do_interactive(struct am_state *state)
+{
+ assert(state->msg);
+
+ for (;;) {
+ char reply[64];
+
+ puts(_("Commit Body is:"));
+ puts("--------------------------");
+ printf("%s", state->msg);
+ puts("--------------------------");
+
+ /*
+ * TRANSLATORS: Make sure to include [y], [n], [e], [v] and [a]
+ * in your translation. The program will only accept English
+ * input at this point.
+ */
+ printf(_("Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all: "));
+ if (!fgets(reply, sizeof(reply), stdin))
+ die("unable to read from stdin; aborting");
+
+ if (*reply == 'y' || *reply == 'Y') {
+ return 0;
+ } else if (*reply == 'a' || *reply == 'A') {
+ state->interactive = 0;
+ return 0;
+ } else if (*reply == 'n' || *reply == 'N') {
+ return 1;
+ } else if (*reply == 'e' || *reply == 'E') {
+ struct strbuf msg = STRBUF_INIT;
+
+ if (!launch_editor(am_path(state, "final-commit"), &msg, NULL)) {
+ free(state->msg);
+ state->msg = strbuf_detach(&msg, &state->msg_len);
+ }
+ strbuf_release(&msg);
+ } else if (*reply == 'v' || *reply == 'V') {
+ const char *pager = git_pager(1);
+ struct child_process cp = CHILD_PROCESS_INIT;
+
+ if (!pager)
+ pager = "cat";
+ prepare_pager_args(&cp, pager);
+ strvec_push(&cp.args, am_path(state, "patch"));
+ run_command(&cp);
+ }
+ }
+}
+
+/**
+ * Applies all queued mail.
+ *
+ * If `resume` is true, we are "resuming". The "msg" and authorship fields, as
+ * well as the state directory's "patch" file is used as-is for applying the
+ * patch and committing it.
+ */
+static void am_run(struct am_state *state, int resume)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ unlink(am_path(state, "dirtyindex"));
+
+ if (repo_refresh_and_write_index(the_repository, REFRESH_QUIET, 0, 0,
+ NULL, NULL, NULL) < 0)
+ die(_("unable to write index file"));
+
+ if (repo_index_has_changes(the_repository, NULL, &sb)) {
+ write_state_bool(state, "dirtyindex", 1);
+ die(_("Dirty index: cannot apply patches (dirty: %s)"), sb.buf);
+ }
+
+ strbuf_release(&sb);
+
+ while (state->cur <= state->last) {
+ const char *mail = am_path(state, msgnum(state));
+ int apply_status;
+ int to_keep;
+
+ reset_ident_date();
+
+ if (!file_exists(mail))
+ goto next;
+
+ if (resume) {
+ validate_resume_state(state);
+ } else {
+ int skip;
+
+ if (state->rebasing)
+ skip = parse_mail_rebase(state, mail);
+ else
+ skip = parse_mail(state, mail);
+
+ if (skip)
+ goto next; /* mail should be skipped */
+
+ if (state->signoff)
+ am_append_signoff(state);
+
+ write_author_script(state);
+ write_commit_msg(state);
+ }
+
+ if (state->interactive && do_interactive(state))
+ goto next;
+
+ to_keep = 0;
+ if (is_empty_or_missing_file(am_path(state, "patch"))) {
+ switch (state->empty_type) {
+ case DROP_EMPTY_COMMIT:
+ say(state, stdout, _("Skipping: %.*s"), linelen(state->msg), state->msg);
+ goto next;
+ break;
+ case KEEP_EMPTY_COMMIT:
+ to_keep = 1;
+ say(state, stdout, _("Creating an empty commit: %.*s"),
+ linelen(state->msg), state->msg);
+ break;
+ case STOP_ON_EMPTY_COMMIT:
+ printf_ln(_("Patch is empty."));
+ die_user_resolve(state);
+ break;
+ }
+ }
+
+ if (run_applypatch_msg_hook(state))
+ exit(1);
+ if (to_keep)
+ goto commit;
+
+ say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg);
+
+ apply_status = run_apply(state, NULL);
+
+ if (apply_status && state->threeway) {
+ struct strbuf sb = STRBUF_INIT;
+
+ strbuf_addstr(&sb, am_path(state, "patch-merge-index"));
+ apply_status = fall_back_threeway(state, sb.buf);
+ strbuf_release(&sb);
+
+ /*
+ * Applying the patch to an earlier tree and merging
+ * the result may have produced the same tree as ours.
+ */
+ if (!apply_status &&
+ !repo_index_has_changes(the_repository, NULL, NULL)) {
+ say(state, stdout, _("No changes -- Patch already applied."));
+ goto next;
+ }
+ }
+
+ if (apply_status) {
+ printf_ln(_("Patch failed at %s %.*s"), msgnum(state),
+ linelen(state->msg), state->msg);
+
+ if (advice_enabled(ADVICE_AM_WORK_DIR))
+ advise(_("Use 'git am --show-current-patch=diff' to see the failed patch"));
+
+ die_user_resolve(state);
+ }
+
+commit:
+ do_commit(state);
+
+next:
+ am_next(state);
+
+ if (resume)
+ am_load(state);
+ resume = 0;
+ }
+
+ if (!is_empty_or_missing_file(am_path(state, "rewritten"))) {
+ assert(state->rebasing);
+ copy_notes_for_rebase(state);
+ run_post_rewrite_hook(state);
+ }
+
+ /*
+ * In rebasing mode, it's up to the caller to take care of
+ * housekeeping.
+ */
+ if (!state->rebasing) {
+ am_destroy(state);
+ run_auto_maintenance(state->quiet);
+ }
+}
+
+/**
+ * Resume the current am session after patch application failure. The user did
+ * all the hard work, and we do not have to do any patch application. Just
+ * trust and commit what the user has in the index and working tree. If `allow_empty`
+ * is true, commit as an empty commit when index has not changed and lacking a patch.
+ */
+static void am_resolve(struct am_state *state, int allow_empty)
+{
+ validate_resume_state(state);
+
+ say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg);
+
+ if (!repo_index_has_changes(the_repository, NULL, NULL)) {
+ if (allow_empty && is_empty_or_missing_file(am_path(state, "patch"))) {
+ printf_ln(_("No changes - recorded it as an empty commit."));
+ } else {
+ printf_ln(_("No changes - did you forget to use 'git add'?\n"
+ "If there is nothing left to stage, chances are that something else\n"
+ "already introduced the same changes; you might want to skip this patch."));
+ die_user_resolve(state);
+ }
+ }
+
+ if (unmerged_index(&the_index)) {
+ printf_ln(_("You still have unmerged paths in your index.\n"
+ "You should 'git add' each file with resolved conflicts to mark them as such.\n"
+ "You might run `git rm` on a file to accept \"deleted by them\" for it."));
+ die_user_resolve(state);
+ }
+
+ if (state->interactive) {
+ write_index_patch(state);
+ if (do_interactive(state))
+ goto next;
+ }
+
+ repo_rerere(the_repository, 0);
+
+ do_commit(state);
+
+next:
+ am_next(state);
+ am_load(state);
+ am_run(state, 0);
+}
+
+/**
+ * Performs a checkout fast-forward from `head` to `remote`. If `reset` is
+ * true, any unmerged entries will be discarded. Returns 0 on success, -1 on
+ * failure.
+ */
+static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
+{
+ struct lock_file lock_file = LOCK_INIT;
+ struct unpack_trees_options opts;
+ struct tree_desc t[2];
+
+ if (parse_tree(head) || parse_tree(remote))
+ return -1;
+
+ repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR);
+
+ refresh_index(&the_index, REFRESH_QUIET, NULL, NULL, NULL);
+
+ memset(&opts, 0, sizeof(opts));
+ opts.head_idx = 1;
+ opts.src_index = &the_index;
+ opts.dst_index = &the_index;
+ opts.update = 1;
+ opts.merge = 1;
+ opts.reset = reset ? UNPACK_RESET_PROTECT_UNTRACKED : 0;
+ opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
+ opts.fn = twoway_merge;
+ init_tree_desc(&t[0], head->buffer, head->size);
+ init_tree_desc(&t[1], remote->buffer, remote->size);
+
+ if (unpack_trees(2, t, &opts)) {
+ rollback_lock_file(&lock_file);
+ return -1;
+ }
+
+ if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+ die(_("unable to write new index file"));
+
+ return 0;
+}
+
+/**
+ * Merges a tree into the index. The index's stat info will take precedence
+ * over the merged tree's. Returns 0 on success, -1 on failure.
+ */
+static int merge_tree(struct tree *tree)
+{
+ struct lock_file lock_file = LOCK_INIT;
+ struct unpack_trees_options opts;
+ struct tree_desc t[1];
+
+ if (parse_tree(tree))
+ return -1;
+
+ repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR);
+
+ memset(&opts, 0, sizeof(opts));
+ opts.head_idx = 1;
+ opts.src_index = &the_index;
+ opts.dst_index = &the_index;
+ opts.merge = 1;
+ opts.fn = oneway_merge;
+ init_tree_desc(&t[0], tree->buffer, tree->size);
+
+ if (unpack_trees(1, t, &opts)) {
+ rollback_lock_file(&lock_file);
+ return -1;
+ }
+
+ if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+ die(_("unable to write new index file"));
+
+ return 0;
+}
+
+/**
+ * Clean the index without touching entries that are not modified between
+ * `head` and `remote`.
+ */
+static int clean_index(const struct object_id *head, const struct object_id *remote)
+{
+ struct tree *head_tree, *remote_tree, *index_tree;
+ struct object_id index;
+
+ head_tree = parse_tree_indirect(head);
+ if (!head_tree)
+ return error(_("Could not parse object '%s'."), oid_to_hex(head));
+
+ remote_tree = parse_tree_indirect(remote);
+ if (!remote_tree)
+ return error(_("Could not parse object '%s'."), oid_to_hex(remote));
+
+ repo_read_index_unmerged(the_repository);
+
+ if (fast_forward_to(head_tree, head_tree, 1))
+ return -1;
+
+ if (write_index_as_tree(&index, &the_index, get_index_file(), 0, NULL))
+ return -1;
+
+ index_tree = parse_tree_indirect(&index);
+ if (!index_tree)
+ return error(_("Could not parse object '%s'."), oid_to_hex(&index));
+
+ if (fast_forward_to(index_tree, remote_tree, 0))
+ return -1;
+
+ if (merge_tree(remote_tree))
+ return -1;
+
+ remove_branch_state(the_repository, 0);
+
+ return 0;
+}
+
+/**
+ * Resets rerere's merge resolution metadata.
+ */
+static void am_rerere_clear(void)
+{
+ struct string_list merge_rr = STRING_LIST_INIT_DUP;
+ rerere_clear(the_repository, &merge_rr);
+ string_list_clear(&merge_rr, 1);
+}
+
+/**
+ * Resume the current am session by skipping the current patch.
+ */
+static void am_skip(struct am_state *state)
+{
+ struct object_id head;
+
+ am_rerere_clear();
+
+ if (repo_get_oid(the_repository, "HEAD", &head))
+ oidcpy(&head, the_hash_algo->empty_tree);
+
+ if (clean_index(&head, &head))
+ die(_("failed to clean index"));
+
+ if (state->rebasing) {
+ FILE *fp = xfopen(am_path(state, "rewritten"), "a");
+
+ assert(!is_null_oid(&state->orig_commit));
+ fprintf(fp, "%s ", oid_to_hex(&state->orig_commit));
+ fprintf(fp, "%s\n", oid_to_hex(&head));
+ fclose(fp);
+ }
+
+ am_next(state);
+ am_load(state);
+ am_run(state, 0);
+}
+
+/**
+ * Returns true if it is safe to reset HEAD to the ORIG_HEAD, false otherwise.
+ *
+ * It is not safe to reset HEAD when:
+ * 1. git-am previously failed because the index was dirty.
+ * 2. HEAD has moved since git-am previously failed.
+ */
+static int safe_to_abort(const struct am_state *state)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct object_id abort_safety, head;
+
+ if (file_exists(am_path(state, "dirtyindex")))
+ return 0;
+
+ if (read_state_file(&sb, state, "abort-safety", 1) > 0) {
+ if (get_oid_hex(sb.buf, &abort_safety))
+ die(_("could not parse %s"), am_path(state, "abort-safety"));
+ } else
+ oidclr(&abort_safety);
+ strbuf_release(&sb);
+
+ if (repo_get_oid(the_repository, "HEAD", &head))
+ oidclr(&head);
+
+ if (oideq(&head, &abort_safety))
+ return 1;
+
+ warning(_("You seem to have moved HEAD since the last 'am' failure.\n"
+ "Not rewinding to ORIG_HEAD"));
+
+ return 0;
+}
+
+/**
+ * Aborts the current am session if it is safe to do so.
+ */
+static void am_abort(struct am_state *state)
+{
+ struct object_id curr_head, orig_head;
+ int has_curr_head, has_orig_head;
+ char *curr_branch;
+
+ if (!safe_to_abort(state)) {
+ am_destroy(state);
+ return;
+ }
+
+ am_rerere_clear();
+
+ curr_branch = resolve_refdup("HEAD", 0, &curr_head, NULL);
+ has_curr_head = curr_branch && !is_null_oid(&curr_head);
+ if (!has_curr_head)
+ oidcpy(&curr_head, the_hash_algo->empty_tree);
+
+ has_orig_head = !repo_get_oid(the_repository, "ORIG_HEAD", &orig_head);
+ if (!has_orig_head)
+ oidcpy(&orig_head, the_hash_algo->empty_tree);
+
+ if (clean_index(&curr_head, &orig_head))
+ die(_("failed to clean index"));
+
+ if (has_orig_head)
+ update_ref("am --abort", "HEAD", &orig_head,
+ has_curr_head ? &curr_head : NULL, 0,
+ UPDATE_REFS_DIE_ON_ERR);
+ else if (curr_branch)
+ delete_ref(NULL, curr_branch, NULL, REF_NO_DEREF);
+
+ free(curr_branch);
+ am_destroy(state);
+}
+
+static int show_patch(struct am_state *state, enum resume_type resume_mode)
+{
+ struct strbuf sb = STRBUF_INIT;
+ const char *patch_path;
+ int len;
+
+ if (!is_null_oid(&state->orig_commit)) {
+ struct child_process cmd = CHILD_PROCESS_INIT;
+
+ strvec_pushl(&cmd.args, "show", oid_to_hex(&state->orig_commit),
+ "--", NULL);
+ cmd.git_cmd = 1;
+ return run_command(&cmd);
+ }
+
+ switch (resume_mode) {
+ case RESUME_SHOW_PATCH_RAW:
+ patch_path = am_path(state, msgnum(state));
+ break;
+ case RESUME_SHOW_PATCH_DIFF:
+ patch_path = am_path(state, "patch");
+ break;
+ default:
+ BUG("invalid mode for --show-current-patch");
+ }
+
+ len = strbuf_read_file(&sb, patch_path, 0);
+ if (len < 0)
+ die_errno(_("failed to read '%s'"), patch_path);
+
+ setup_pager();
+ write_in_full(1, sb.buf, sb.len);
+ strbuf_release(&sb);
+ return 0;
+}
+
+/**
+ * parse_options() callback that validates and sets opt->value to the
+ * PATCH_FORMAT_* enum value corresponding to `arg`.
+ */
+static int parse_opt_patchformat(const struct option *opt, const char *arg, int unset)
+{
+ int *opt_value = opt->value;
+
+ if (unset)
+ *opt_value = PATCH_FORMAT_UNKNOWN;
+ else if (!strcmp(arg, "mbox"))
+ *opt_value = PATCH_FORMAT_MBOX;
+ else if (!strcmp(arg, "stgit"))
+ *opt_value = PATCH_FORMAT_STGIT;
+ else if (!strcmp(arg, "stgit-series"))
+ *opt_value = PATCH_FORMAT_STGIT_SERIES;
+ else if (!strcmp(arg, "hg"))
+ *opt_value = PATCH_FORMAT_HG;
+ else if (!strcmp(arg, "mboxrd"))
+ *opt_value = PATCH_FORMAT_MBOXRD;
+ /*
+ * Please update $__git_patchformat in git-completion.bash
+ * when you add new options
+ */
+ else
+ return error(_("invalid value for '%s': '%s'"),
+ "--patch-format", arg);
+ return 0;
+}
+
+static int parse_opt_show_current_patch(const struct option *opt, const char *arg, int unset)
+{
+ int *opt_value = opt->value;
+
+ BUG_ON_OPT_NEG(unset);
+
+ if (!arg)
+ *opt_value = opt->defval;
+ else if (!strcmp(arg, "raw"))
+ *opt_value = RESUME_SHOW_PATCH_RAW;
+ else if (!strcmp(arg, "diff"))
+ *opt_value = RESUME_SHOW_PATCH_DIFF;
+ /*
+ * Please update $__git_showcurrentpatch in git-completion.bash
+ * when you add new options
+ */
+ else
+ return error(_("invalid value for '%s': '%s'"),
+ "--show-current-patch", arg);
+ return 0;
+}
+
+int cmd_am(int argc, const char **argv, const char *prefix)
+{
+ struct am_state state;
+ int binary = -1;
+ int keep_cr = -1;
+ int patch_format = PATCH_FORMAT_UNKNOWN;
+ enum resume_type resume_mode = RESUME_FALSE;
+ int in_progress;
+ int ret = 0;
+
+ const char * const usage[] = {
+ N_("git am [<options>] [(<mbox> | <Maildir>)...]"),
+ N_("git am [<options>] (--continue | --skip | --abort)"),
+ NULL
+ };
+
+ struct option options[] = {
+ OPT_BOOL('i', "interactive", &state.interactive,
+ N_("run interactively")),
+ OPT_BOOL('n', "no-verify", &state.no_verify,
+ N_("bypass pre-applypatch and applypatch-msg hooks")),
+ OPT_HIDDEN_BOOL('b', "binary", &binary,
+ N_("historical option -- no-op")),
+ OPT_BOOL('3', "3way", &state.threeway,
+ N_("allow fall back on 3way merging if needed")),
+ OPT__QUIET(&state.quiet, N_("be quiet")),
+ OPT_SET_INT('s', "signoff", &state.signoff,
+ N_("add a Signed-off-by trailer to the commit message"),
+ SIGNOFF_EXPLICIT),
+ OPT_BOOL('u', "utf8", &state.utf8,
+ N_("recode into utf8 (default)")),
+ OPT_SET_INT('k', "keep", &state.keep,
+ N_("pass -k flag to git-mailinfo"), KEEP_TRUE),
+ OPT_SET_INT(0, "keep-non-patch", &state.keep,
+ N_("pass -b flag to git-mailinfo"), KEEP_NON_PATCH),
+ OPT_BOOL('m', "message-id", &state.message_id,
+ N_("pass -m flag to git-mailinfo")),
+ OPT_SET_INT(0, "keep-cr", &keep_cr,
+ N_("pass --keep-cr flag to git-mailsplit for mbox format"),
+ 1),
+ OPT_BOOL('c', "scissors", &state.scissors,
+ N_("strip everything before a scissors line")),
+ OPT_CALLBACK_F(0, "quoted-cr", &state.quoted_cr, N_("action"),
+ N_("pass it through git-mailinfo"),
+ PARSE_OPT_NONEG, am_option_parse_quoted_cr),
+ OPT_PASSTHRU_ARGV(0, "whitespace", &state.git_apply_opts, N_("action"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_PASSTHRU_ARGV(0, "ignore-space-change", &state.git_apply_opts, NULL,
+ N_("pass it through git-apply"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU_ARGV(0, "ignore-whitespace", &state.git_apply_opts, NULL,
+ N_("pass it through git-apply"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU_ARGV(0, "directory", &state.git_apply_opts, N_("root"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_PASSTHRU_ARGV(0, "exclude", &state.git_apply_opts, N_("path"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_PASSTHRU_ARGV(0, "include", &state.git_apply_opts, N_("path"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_PASSTHRU_ARGV('C', NULL, &state.git_apply_opts, N_("n"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_PASSTHRU_ARGV('p', NULL, &state.git_apply_opts, N_("num"),
+ N_("pass it through git-apply"),
+ 0),
+ OPT_CALLBACK(0, "patch-format", &patch_format, N_("format"),
+ N_("format the patch(es) are in"),
+ parse_opt_patchformat),
+ OPT_PASSTHRU_ARGV(0, "reject", &state.git_apply_opts, NULL,
+ N_("pass it through git-apply"),
+ PARSE_OPT_NOARG),
+ OPT_STRING(0, "resolvemsg", &state.resolvemsg, NULL,
+ N_("override error message when patch failure occurs")),
+ OPT_CMDMODE(0, "continue", &resume_mode,
+ N_("continue applying patches after resolving a conflict"),
+ RESUME_RESOLVED),
+ OPT_CMDMODE('r', "resolved", &resume_mode,
+ N_("synonyms for --continue"),
+ RESUME_RESOLVED),
+ OPT_CMDMODE(0, "skip", &resume_mode,
+ N_("skip the current patch"),
+ RESUME_SKIP),
+ OPT_CMDMODE(0, "abort", &resume_mode,
+ N_("restore the original branch and abort the patching operation"),
+ RESUME_ABORT),
+ OPT_CMDMODE(0, "quit", &resume_mode,
+ N_("abort the patching operation but keep HEAD where it is"),
+ RESUME_QUIT),
+ { OPTION_CALLBACK, 0, "show-current-patch", &resume_mode,
+ "(diff|raw)",
+ N_("show the patch being applied"),
+ PARSE_OPT_CMDMODE | PARSE_OPT_OPTARG | PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
+ parse_opt_show_current_patch, RESUME_SHOW_PATCH_RAW },
+ OPT_CMDMODE(0, "allow-empty", &resume_mode,
+ N_("record the empty patch as an empty commit"),
+ RESUME_ALLOW_EMPTY),
+ OPT_BOOL(0, "committer-date-is-author-date",
+ &state.committer_date_is_author_date,
+ N_("lie about committer date")),
+ OPT_BOOL(0, "ignore-date", &state.ignore_date,
+ N_("use current timestamp for author date")),
+ OPT_RERERE_AUTOUPDATE(&state.allow_rerere_autoupdate),
+ { OPTION_STRING, 'S', "gpg-sign", &state.sign_commit, N_("key-id"),
+ N_("GPG-sign commits"),
+ PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
+ OPT_CALLBACK_F(0, "empty", &state.empty_type, "(stop|drop|keep)",
+ N_("how to handle empty patches"),
+ PARSE_OPT_NONEG, am_option_parse_empty),
+ OPT_HIDDEN_BOOL(0, "rebasing", &state.rebasing,
+ N_("(internal use for git-rebase)")),
+ OPT_END()
+ };
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage_with_options(usage, options);
+
+ git_config(git_default_config, NULL);
+
+ am_state_init(&state);
+
+ in_progress = am_in_progress(&state);
+ if (in_progress)
+ am_load(&state);
+
+ argc = parse_options(argc, argv, prefix, options, usage, 0);
+
+ if (binary >= 0)
+ fprintf_ln(stderr, _("The -b/--binary option has been a no-op for long time, and\n"
+ "it will be removed. Please do not use it anymore."));
+
+ /* Ensure a valid committer ident can be constructed */
+ git_committer_info(IDENT_STRICT);
+
+ if (repo_read_index_preload(the_repository, NULL, 0) < 0)
+ die(_("failed to read the index"));
+
+ if (in_progress) {
+ /*
+ * Catch user error to feed us patches when there is a session
+ * in progress:
+ *
+ * 1. mbox path(s) are provided on the command-line.
+ * 2. stdin is not a tty: the user is trying to feed us a patch
+ * from standard input. This is somewhat unreliable -- stdin
+ * could be /dev/null for example and the caller did not
+ * intend to feed us a patch but wanted to continue
+ * unattended.
+ */
+ if (argc || (resume_mode == RESUME_FALSE && !isatty(0)))
+ die(_("previous rebase directory %s still exists but mbox given."),
+ state.dir);
+
+ if (resume_mode == RESUME_FALSE)
+ resume_mode = RESUME_APPLY;
+
+ if (state.signoff == SIGNOFF_EXPLICIT)
+ am_append_signoff(&state);
+ } else {
+ struct strvec paths = STRVEC_INIT;
+ int i;
+
+ /*
+ * Handle stray state directory in the independent-run case. In
+ * the --rebasing case, it is up to the caller to take care of
+ * stray directories.
+ */
+ if (file_exists(state.dir) && !state.rebasing) {
+ if (resume_mode == RESUME_ABORT || resume_mode == RESUME_QUIT) {
+ am_destroy(&state);
+ am_state_release(&state);
+ return 0;
+ }
+
+ die(_("Stray %s directory found.\n"
+ "Use \"git am --abort\" to remove it."),
+ state.dir);
+ }
+
+ if (resume_mode)
+ die(_("Resolve operation not in progress, we are not resuming."));
+
+ for (i = 0; i < argc; i++) {
+ if (is_absolute_path(argv[i]) || !prefix)
+ strvec_push(&paths, argv[i]);
+ else
+ strvec_push(&paths, mkpath("%s/%s", prefix, argv[i]));
+ }
+
+ if (state.interactive && !paths.nr)
+ die(_("interactive mode requires patches on the command line"));
+
+ am_setup(&state, patch_format, paths.v, keep_cr);
+
+ strvec_clear(&paths);
+ }
+
+ switch (resume_mode) {
+ case RESUME_FALSE:
+ am_run(&state, 0);
+ break;
+ case RESUME_APPLY:
+ am_run(&state, 1);
+ break;
+ case RESUME_RESOLVED:
+ case RESUME_ALLOW_EMPTY:
+ am_resolve(&state, resume_mode == RESUME_ALLOW_EMPTY ? 1 : 0);
+ break;
+ case RESUME_SKIP:
+ am_skip(&state);
+ break;
+ case RESUME_ABORT:
+ am_abort(&state);
+ break;
+ case RESUME_QUIT:
+ am_rerere_clear();
+ am_destroy(&state);
+ break;
+ case RESUME_SHOW_PATCH_RAW:
+ case RESUME_SHOW_PATCH_DIFF:
+ ret = show_patch(&state, resume_mode);
+ break;
+ default:
+ BUG("invalid resume value");
+ }
+
+ am_state_release(&state);
+
+ return ret;
+}