1 files changed, 498 insertions, 0 deletions

diff --git a/examples/status.c b/examples/status.c
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+++ b/examples/status.c
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+/*
+ * libgit2 "status" example - shows how to use the status APIs
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the use of the libgit2 status APIs,
+ * particularly the `git_status_list` object, to roughly simulate the
+ * output of running `git status`.  It serves as a simple example of
+ * using those APIs to get basic status information.
+ *
+ * This does not have:
+ *
+ * - Robust error handling
+ * - Colorized or paginated output formatting
+ *
+ * This does have:
+ *
+ * - Examples of translating command line arguments to the status
+ *   options settings to mimic `git status` results.
+ * - A sample status formatter that matches the default "long" format
+ *   from `git status`
+ * - A sample status formatter that matches the "short" format
+ */
+
+enum {
+	FORMAT_DEFAULT   = 0,
+	FORMAT_LONG      = 1,
+	FORMAT_SHORT     = 2,
+	FORMAT_PORCELAIN = 3
+};
+
+#define MAX_PATHSPEC 8
+
+struct status_opts {
+	git_status_options statusopt;
+	char *repodir;
+	char *pathspec[MAX_PATHSPEC];
+	int npaths;
+	int format;
+	int zterm;
+	int showbranch;
+	int showsubmod;
+	int repeat;
+};
+
+static void parse_opts(struct status_opts *o, int argc, char *argv[]);
+static void show_branch(git_repository *repo, int format);
+static void print_long(git_status_list *status);
+static void print_short(git_repository *repo, git_status_list *status);
+static int print_submod(git_submodule *sm, const char *name, void *payload);
+
+int lg2_status(git_repository *repo, int argc, char *argv[])
+{
+	git_status_list *status;
+	struct status_opts o = { GIT_STATUS_OPTIONS_INIT, "." };
+
+	o.statusopt.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
+	o.statusopt.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
+		GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
+		GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
+
+	parse_opts(&o, argc, argv);
+
+	if (git_repository_is_bare(repo))
+		fatal("Cannot report status on bare repository",
+			git_repository_path(repo));
+
+show_status:
+	if (o.repeat)
+		printf("\033[H\033[2J");
+
+	/**
+	 * Run status on the repository
+	 *
+	 * We use `git_status_list_new()` to generate a list of status
+	 * information which lets us iterate over it at our
+	 * convenience and extract the data we want to show out of
+	 * each entry.
+	 *
+	 * You can use `git_status_foreach()` or
+	 * `git_status_foreach_ext()` if you'd prefer to execute a
+	 * callback for each entry. The latter gives you more control
+	 * about what results are presented.
+	 */
+	check_lg2(git_status_list_new(&status, repo, &o.statusopt),
+		"Could not get status", NULL);
+
+	if (o.showbranch)
+		show_branch(repo, o.format);
+
+	if (o.showsubmod) {
+		int submod_count = 0;
+		check_lg2(git_submodule_foreach(repo, print_submod, &submod_count),
+			"Cannot iterate submodules", o.repodir);
+	}
+
+	if (o.format == FORMAT_LONG)
+		print_long(status);
+	else
+		print_short(repo, status);
+
+	git_status_list_free(status);
+
+	if (o.repeat) {
+		sleep(o.repeat);
+		goto show_status;
+	}
+
+	return 0;
+}
+
+/**
+ * If the user asked for the branch, let's show the short name of the
+ * branch.
+ */
+static void show_branch(git_repository *repo, int format)
+{
+	int error = 0;
+	const char *branch = NULL;
+	git_reference *head = NULL;
+
+	error = git_repository_head(&head, repo);
+
+	if (error == GIT_EUNBORNBRANCH || error == GIT_ENOTFOUND)
+		branch = NULL;
+	else if (!error) {
+		branch = git_reference_shorthand(head);
+	} else
+		check_lg2(error, "failed to get current branch", NULL);
+
+	if (format == FORMAT_LONG)
+		printf("# On branch %s\n",
+			branch ? branch : "Not currently on any branch.");
+	else
+		printf("## %s\n", branch ? branch : "HEAD (no branch)");
+
+	git_reference_free(head);
+}
+
+/**
+ * This function print out an output similar to git's status command
+ * in long form, including the command-line hints.
+ */
+static void print_long(git_status_list *status)
+{
+	size_t i, maxi = git_status_list_entrycount(status);
+	const git_status_entry *s;
+	int header = 0, changes_in_index = 0;
+	int changed_in_workdir = 0, rm_in_workdir = 0;
+	const char *old_path, *new_path;
+
+	/** Print index changes. */
+
+	for (i = 0; i < maxi; ++i) {
+		char *istatus = NULL;
+
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_CURRENT)
+			continue;
+
+		if (s->status & GIT_STATUS_WT_DELETED)
+			rm_in_workdir = 1;
+
+		if (s->status & GIT_STATUS_INDEX_NEW)
+			istatus = "new file: ";
+		if (s->status & GIT_STATUS_INDEX_MODIFIED)
+			istatus = "modified: ";
+		if (s->status & GIT_STATUS_INDEX_DELETED)
+			istatus = "deleted:  ";
+		if (s->status & GIT_STATUS_INDEX_RENAMED)
+			istatus = "renamed:  ";
+		if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
+			istatus = "typechange:";
+
+		if (istatus == NULL)
+			continue;
+
+		if (!header) {
+			printf("# Changes to be committed:\n");
+			printf("#   (use \"git reset HEAD <file>...\" to unstage)\n");
+			printf("#\n");
+			header = 1;
+		}
+
+		old_path = s->head_to_index->old_file.path;
+		new_path = s->head_to_index->new_file.path;
+
+		if (old_path && new_path && strcmp(old_path, new_path))
+			printf("#\t%s  %s -> %s\n", istatus, old_path, new_path);
+		else
+			printf("#\t%s  %s\n", istatus, old_path ? old_path : new_path);
+	}
+
+	if (header) {
+		changes_in_index = 1;
+		printf("#\n");
+	}
+	header = 0;
+
+	/** Print workdir changes to tracked files. */
+
+	for (i = 0; i < maxi; ++i) {
+		char *wstatus = NULL;
+
+		s = git_status_byindex(status, i);
+
+		/**
+		 * With `GIT_STATUS_OPT_INCLUDE_UNMODIFIED` (not used in this example)
+		 * `index_to_workdir` may not be `NULL` even if there are
+		 * no differences, in which case it will be a `GIT_DELTA_UNMODIFIED`.
+		 */
+		if (s->status == GIT_STATUS_CURRENT || s->index_to_workdir == NULL)
+			continue;
+
+		/** Print out the output since we know the file has some changes */
+		if (s->status & GIT_STATUS_WT_MODIFIED)
+			wstatus = "modified: ";
+		if (s->status & GIT_STATUS_WT_DELETED)
+			wstatus = "deleted:  ";
+		if (s->status & GIT_STATUS_WT_RENAMED)
+			wstatus = "renamed:  ";
+		if (s->status & GIT_STATUS_WT_TYPECHANGE)
+			wstatus = "typechange:";
+
+		if (wstatus == NULL)
+			continue;
+
+		if (!header) {
+			printf("# Changes not staged for commit:\n");
+			printf("#   (use \"git add%s <file>...\" to update what will be committed)\n", rm_in_workdir ? "/rm" : "");
+			printf("#   (use \"git checkout -- <file>...\" to discard changes in working directory)\n");
+			printf("#\n");
+			header = 1;
+		}
+
+		old_path = s->index_to_workdir->old_file.path;
+		new_path = s->index_to_workdir->new_file.path;
+
+		if (old_path && new_path && strcmp(old_path, new_path))
+			printf("#\t%s  %s -> %s\n", wstatus, old_path, new_path);
+		else
+			printf("#\t%s  %s\n", wstatus, old_path ? old_path : new_path);
+	}
+
+	if (header) {
+		changed_in_workdir = 1;
+		printf("#\n");
+	}
+
+	/** Print untracked files. */
+
+	header = 0;
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_WT_NEW) {
+
+			if (!header) {
+				printf("# Untracked files:\n");
+				printf("#   (use \"git add <file>...\" to include in what will be committed)\n");
+				printf("#\n");
+				header = 1;
+			}
+
+			printf("#\t%s\n", s->index_to_workdir->old_file.path);
+		}
+	}
+
+	header = 0;
+
+	/** Print ignored files. */
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_IGNORED) {
+
+			if (!header) {
+				printf("# Ignored files:\n");
+				printf("#   (use \"git add -f <file>...\" to include in what will be committed)\n");
+				printf("#\n");
+				header = 1;
+			}
+
+			printf("#\t%s\n", s->index_to_workdir->old_file.path);
+		}
+	}
+
+	if (!changes_in_index && changed_in_workdir)
+		printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
+}
+
+/**
+ * This version of the output prefixes each path with two status
+ * columns and shows submodule status information.
+ */
+static void print_short(git_repository *repo, git_status_list *status)
+{
+	size_t i, maxi = git_status_list_entrycount(status);
+	const git_status_entry *s;
+	char istatus, wstatus;
+	const char *extra, *a, *b, *c;
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_CURRENT)
+			continue;
+
+		a = b = c = NULL;
+		istatus = wstatus = ' ';
+		extra = "";
+
+		if (s->status & GIT_STATUS_INDEX_NEW)
+			istatus = 'A';
+		if (s->status & GIT_STATUS_INDEX_MODIFIED)
+			istatus = 'M';
+		if (s->status & GIT_STATUS_INDEX_DELETED)
+			istatus = 'D';
+		if (s->status & GIT_STATUS_INDEX_RENAMED)
+			istatus = 'R';
+		if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
+			istatus = 'T';
+
+		if (s->status & GIT_STATUS_WT_NEW) {
+			if (istatus == ' ')
+				istatus = '?';
+			wstatus = '?';
+		}
+		if (s->status & GIT_STATUS_WT_MODIFIED)
+			wstatus = 'M';
+		if (s->status & GIT_STATUS_WT_DELETED)
+			wstatus = 'D';
+		if (s->status & GIT_STATUS_WT_RENAMED)
+			wstatus = 'R';
+		if (s->status & GIT_STATUS_WT_TYPECHANGE)
+			wstatus = 'T';
+
+		if (s->status & GIT_STATUS_IGNORED) {
+			istatus = '!';
+			wstatus = '!';
+		}
+
+		if (istatus == '?' && wstatus == '?')
+			continue;
+
+		/**
+		 * A commit in a tree is how submodules are stored, so
+		 * let's go take a look at its status.
+		 */
+		if (s->index_to_workdir &&
+			s->index_to_workdir->new_file.mode == GIT_FILEMODE_COMMIT)
+		{
+			unsigned int smstatus = 0;
+
+			if (!git_submodule_status(&smstatus, repo, s->index_to_workdir->new_file.path,
+						  GIT_SUBMODULE_IGNORE_UNSPECIFIED)) {
+				if (smstatus & GIT_SUBMODULE_STATUS_WD_MODIFIED)
+					extra = " (new commits)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_INDEX_MODIFIED)
+					extra = " (modified content)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_WD_MODIFIED)
+					extra = " (modified content)";
+				else if (smstatus & GIT_SUBMODULE_STATUS_WD_UNTRACKED)
+					extra = " (untracked content)";
+			}
+		}
+
+		/**
+		 * Now that we have all the information, format the output.
+		 */
+
+		if (s->head_to_index) {
+			a = s->head_to_index->old_file.path;
+			b = s->head_to_index->new_file.path;
+		}
+		if (s->index_to_workdir) {
+			if (!a)
+				a = s->index_to_workdir->old_file.path;
+			if (!b)
+				b = s->index_to_workdir->old_file.path;
+			c = s->index_to_workdir->new_file.path;
+		}
+
+		if (istatus == 'R') {
+			if (wstatus == 'R')
+				printf("%c%c %s %s %s%s\n", istatus, wstatus, a, b, c, extra);
+			else
+				printf("%c%c %s %s%s\n", istatus, wstatus, a, b, extra);
+		} else {
+			if (wstatus == 'R')
+				printf("%c%c %s %s%s\n", istatus, wstatus, a, c, extra);
+			else
+				printf("%c%c %s%s\n", istatus, wstatus, a, extra);
+		}
+	}
+
+	for (i = 0; i < maxi; ++i) {
+		s = git_status_byindex(status, i);
+
+		if (s->status == GIT_STATUS_WT_NEW)
+			printf("?? %s\n", s->index_to_workdir->old_file.path);
+	}
+}
+
+static int print_submod(git_submodule *sm, const char *name, void *payload)
+{
+	int *count = payload;
+	(void)name;
+
+	if (*count == 0)
+		printf("# Submodules\n");
+	(*count)++;
+
+	printf("# - submodule '%s' at %s\n",
+		git_submodule_name(sm), git_submodule_path(sm));
+
+	return 0;
+}
+
+/**
+ * Parse options that git's status command supports.
+ */
+static void parse_opts(struct status_opts *o, int argc, char *argv[])
+{
+	struct args_info args = ARGS_INFO_INIT;
+
+	for (args.pos = 1; args.pos < argc; ++args.pos) {
+		char *a = argv[args.pos];
+
+		if (a[0] != '-') {
+			if (o->npaths < MAX_PATHSPEC)
+				o->pathspec[o->npaths++] = a;
+			else
+				fatal("Example only supports a limited pathspec", NULL);
+		}
+		else if (!strcmp(a, "-s") || !strcmp(a, "--short"))
+			o->format = FORMAT_SHORT;
+		else if (!strcmp(a, "--long"))
+			o->format = FORMAT_LONG;
+		else if (!strcmp(a, "--porcelain"))
+			o->format = FORMAT_PORCELAIN;
+		else if (!strcmp(a, "-b") || !strcmp(a, "--branch"))
+			o->showbranch = 1;
+		else if (!strcmp(a, "-z")) {
+			o->zterm = 1;
+			if (o->format == FORMAT_DEFAULT)
+				o->format = FORMAT_PORCELAIN;
+		}
+		else if (!strcmp(a, "--ignored"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_IGNORED;
+		else if (!strcmp(a, "-uno") ||
+				 !strcmp(a, "--untracked-files=no"))
+			o->statusopt.flags &= ~GIT_STATUS_OPT_INCLUDE_UNTRACKED;
+		else if (!strcmp(a, "-unormal") ||
+				 !strcmp(a, "--untracked-files=normal"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED;
+		else if (!strcmp(a, "-uall") ||
+				 !strcmp(a, "--untracked-files=all"))
+			o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED |
+				GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS;
+		else if (!strcmp(a, "--ignore-submodules=all"))
+			o->statusopt.flags |= GIT_STATUS_OPT_EXCLUDE_SUBMODULES;
+		else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
+			o->repodir = a + strlen("--git-dir=");
+		else if (!strcmp(a, "--repeat"))
+			o->repeat = 10;
+		else if (match_int_arg(&o->repeat, &args, "--repeat", 0))
+			/* okay */;
+		else if (!strcmp(a, "--list-submodules"))
+			o->showsubmod = 1;
+		else
+			check_lg2(-1, "Unsupported option", a);
+	}
+
+	if (o->format == FORMAT_DEFAULT)
+		o->format = FORMAT_LONG;
+	if (o->format == FORMAT_LONG)
+		o->showbranch = 1;
+	if (o->npaths > 0) {
+		o->statusopt.pathspec.strings = o->pathspec;
+		o->statusopt.pathspec.count   = o->npaths;
+	}
+}