summaryrefslogtreecommitdiffstats
path: root/mailmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'mailmap.c')
-rw-r--r--mailmap.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/mailmap.c b/mailmap.c
new file mode 100644
index 0000000..da2589b
--- /dev/null
+++ b/mailmap.c
@@ -0,0 +1,358 @@
+#include "cache.h"
+#include "string-list.h"
+#include "mailmap.h"
+#include "object-store.h"
+
+#define DEBUG_MAILMAP 0
+#if DEBUG_MAILMAP
+#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
+#define debug_str(X) ((X) ? (X) : "(none)")
+#else
+__attribute__((format (printf, 1, 2)))
+static inline void debug_mm(const char *format, ...) {}
+static inline const char *debug_str(const char *s) { return s; }
+#endif
+
+const char *git_mailmap_file;
+const char *git_mailmap_blob;
+
+struct mailmap_info {
+ char *name;
+ char *email;
+};
+
+struct mailmap_entry {
+ /* name and email for the simple mail-only case */
+ char *name;
+ char *email;
+
+ /* name and email for the complex mail and name matching case */
+ struct string_list namemap;
+};
+
+static void free_mailmap_info(void *p, const char *s)
+{
+ struct mailmap_info *mi = (struct mailmap_info *)p;
+ debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n",
+ s, debug_str(mi->name), debug_str(mi->email));
+ free(mi->name);
+ free(mi->email);
+ free(mi);
+}
+
+static void free_mailmap_entry(void *p, const char *s)
+{
+ struct mailmap_entry *me = (struct mailmap_entry *)p;
+ debug_mm("mailmap: removing entries for <%s>, with %"PRIuMAX" sub-entries\n",
+ s, (uintmax_t)me->namemap.nr);
+ debug_mm("mailmap: - simple: '%s' <%s>\n",
+ debug_str(me->name), debug_str(me->email));
+
+ free(me->name);
+ free(me->email);
+
+ me->namemap.strdup_strings = 1;
+ string_list_clear_func(&me->namemap, free_mailmap_info);
+ free(me);
+}
+
+/*
+ * On some systems (e.g. MinGW 4.0), string.h has _only_ inline
+ * definition of strcasecmp and no non-inline implementation is
+ * supplied anywhere, which is, eh, "unusual"; we cannot take an
+ * address of such a function to store it in namemap.cmp. This is
+ * here as a workaround---do not assign strcasecmp directly to
+ * namemap.cmp until we know no systems that matter have such an
+ * "unusual" string.h.
+ */
+static int namemap_cmp(const char *a, const char *b)
+{
+ return strcasecmp(a, b);
+}
+
+static void add_mapping(struct string_list *map,
+ char *new_name, char *new_email,
+ char *old_name, char *old_email)
+{
+ struct mailmap_entry *me;
+ struct string_list_item *item;
+
+ if (!old_email) {
+ old_email = new_email;
+ new_email = NULL;
+ }
+
+ item = string_list_insert(map, old_email);
+ if (item->util) {
+ me = (struct mailmap_entry *)item->util;
+ } else {
+ CALLOC_ARRAY(me, 1);
+ me->namemap.strdup_strings = 1;
+ me->namemap.cmp = namemap_cmp;
+ item->util = me;
+ }
+
+ if (!old_name) {
+ debug_mm("mailmap: adding (simple) entry for '%s'\n", old_email);
+
+ /* Replace current name and new email for simple entry */
+ if (new_name) {
+ free(me->name);
+ me->name = xstrdup(new_name);
+ }
+ if (new_email) {
+ free(me->email);
+ me->email = xstrdup(new_email);
+ }
+ } else {
+ struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
+ debug_mm("mailmap: adding (complex) entry for '%s'\n", old_email);
+ mi->name = xstrdup_or_null(new_name);
+ mi->email = xstrdup_or_null(new_email);
+ string_list_insert(&me->namemap, old_name)->util = mi;
+ }
+
+ debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
+ debug_str(old_name), old_email,
+ debug_str(new_name), debug_str(new_email));
+}
+
+static char *parse_name_and_email(char *buffer, char **name,
+ char **email, int allow_empty_email)
+{
+ char *left, *right, *nstart, *nend;
+ *name = *email = NULL;
+
+ if (!(left = strchr(buffer, '<')))
+ return NULL;
+ if (!(right = strchr(left + 1, '>')))
+ return NULL;
+ if (!allow_empty_email && (left+1 == right))
+ return NULL;
+
+ /* remove whitespace from beginning and end of name */
+ nstart = buffer;
+ while (isspace(*nstart) && nstart < left)
+ ++nstart;
+ nend = left-1;
+ while (nend > nstart && isspace(*nend))
+ --nend;
+
+ *name = (nstart <= nend ? nstart : NULL);
+ *email = left+1;
+ *(nend+1) = '\0';
+ *right++ = '\0';
+
+ return (*right == '\0' ? NULL : right);
+}
+
+static void read_mailmap_line(struct string_list *map, char *buffer)
+{
+ char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
+
+ if (buffer[0] == '#')
+ return;
+
+ if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)))
+ parse_name_and_email(name2, &name2, &email2, 1);
+
+ if (email1)
+ add_mapping(map, name1, email1, name2, email2);
+}
+
+/* Flags for read_mailmap_file() */
+#define MAILMAP_NOFOLLOW (1<<0)
+
+static int read_mailmap_file(struct string_list *map, const char *filename,
+ unsigned flags)
+{
+ char buffer[1024];
+ FILE *f;
+ int fd;
+
+ if (!filename)
+ return 0;
+
+ if (flags & MAILMAP_NOFOLLOW)
+ fd = open_nofollow(filename, O_RDONLY);
+ else
+ fd = open(filename, O_RDONLY);
+
+ if (fd < 0) {
+ if (errno == ENOENT)
+ return 0;
+ return error_errno("unable to open mailmap at %s", filename);
+ }
+ f = xfdopen(fd, "r");
+
+ while (fgets(buffer, sizeof(buffer), f) != NULL)
+ read_mailmap_line(map, buffer);
+ fclose(f);
+ return 0;
+}
+
+static void read_mailmap_string(struct string_list *map, char *buf)
+{
+ while (*buf) {
+ char *end = strchrnul(buf, '\n');
+
+ if (*end)
+ *end++ = '\0';
+
+ read_mailmap_line(map, buf);
+ buf = end;
+ }
+}
+
+static int read_mailmap_blob(struct string_list *map, const char *name)
+{
+ struct object_id oid;
+ char *buf;
+ unsigned long size;
+ enum object_type type;
+
+ if (!name)
+ return 0;
+ if (get_oid(name, &oid) < 0)
+ return 0;
+
+ buf = read_object_file(&oid, &type, &size);
+ if (!buf)
+ return error("unable to read mailmap object at %s", name);
+ if (type != OBJ_BLOB)
+ return error("mailmap is not a blob: %s", name);
+
+ read_mailmap_string(map, buf);
+
+ free(buf);
+ return 0;
+}
+
+int read_mailmap(struct string_list *map)
+{
+ int err = 0;
+
+ map->strdup_strings = 1;
+ map->cmp = namemap_cmp;
+
+ if (!git_mailmap_blob && is_bare_repository())
+ git_mailmap_blob = "HEAD:.mailmap";
+
+ if (!startup_info->have_repository || !is_bare_repository())
+ err |= read_mailmap_file(map, ".mailmap",
+ startup_info->have_repository ?
+ MAILMAP_NOFOLLOW : 0);
+ if (startup_info->have_repository)
+ err |= read_mailmap_blob(map, git_mailmap_blob);
+ err |= read_mailmap_file(map, git_mailmap_file, 0);
+ return err;
+}
+
+void clear_mailmap(struct string_list *map)
+{
+ debug_mm("mailmap: clearing %"PRIuMAX" entries...\n",
+ (uintmax_t)map->nr);
+ map->strdup_strings = 1;
+ string_list_clear_func(map, free_mailmap_entry);
+ debug_mm("mailmap: cleared\n");
+}
+
+/*
+ * Look for an entry in map that match string[0:len]; string[len]
+ * does not have to be NUL (but it could be).
+ */
+static struct string_list_item *lookup_prefix(struct string_list *map,
+ const char *string, size_t len)
+{
+ int i = string_list_find_insert_index(map, string, 1);
+ if (i < 0) {
+ /* exact match */
+ i = -1 - i;
+ if (!string[len])
+ return &map->items[i];
+ /*
+ * that map entry matches exactly to the string, including
+ * the cruft at the end beyond "len". That is not a match
+ * with string[0:len] that we are looking for.
+ */
+ } else if (!string[len]) {
+ /*
+ * asked with the whole string, and got nothing. No
+ * matching entry can exist in the map.
+ */
+ return NULL;
+ }
+
+ /*
+ * i is at the exact match to an overlong key, or location the
+ * overlong key would be inserted, which must come after the
+ * real location of the key if one exists.
+ */
+ while (0 <= --i && i < map->nr) {
+ int cmp = strncasecmp(map->items[i].string, string, len);
+ if (cmp < 0)
+ /*
+ * "i" points at a key definitely below the prefix;
+ * the map does not have string[0:len] in it.
+ */
+ break;
+ else if (!cmp && !map->items[i].string[len])
+ /* found it */
+ return &map->items[i];
+ /*
+ * otherwise, the string at "i" may be string[0:len]
+ * followed by a string that sorts later than string[len:];
+ * keep trying.
+ */
+ }
+ return NULL;
+}
+
+int map_user(struct string_list *map,
+ const char **email, size_t *emaillen,
+ const char **name, size_t *namelen)
+{
+ struct string_list_item *item;
+ struct mailmap_entry *me;
+
+ debug_mm("map_user: map '%.*s' <%.*s>\n",
+ (int)*namelen, debug_str(*name),
+ (int)*emaillen, debug_str(*email));
+
+ item = lookup_prefix(map, *email, *emaillen);
+ if (item) {
+ me = (struct mailmap_entry *)item->util;
+ if (me->namemap.nr) {
+ /*
+ * The item has multiple items, so we'll look up on
+ * name too. If the name is not found, we choose the
+ * simple entry.
+ */
+ struct string_list_item *subitem;
+ subitem = lookup_prefix(&me->namemap, *name, *namelen);
+ if (subitem)
+ item = subitem;
+ }
+ }
+ if (item) {
+ struct mailmap_info *mi = (struct mailmap_info *)item->util;
+ if (mi->name == NULL && mi->email == NULL) {
+ debug_mm("map_user: -- (no simple mapping)\n");
+ return 0;
+ }
+ if (mi->email) {
+ *email = mi->email;
+ *emaillen = strlen(*email);
+ }
+ if (mi->name) {
+ *name = mi->name;
+ *namelen = strlen(*name);
+ }
+ debug_mm("map_user: to '%.*s' <%.*s>\n",
+ (int)*namelen, debug_str(*name),
+ (int)*emaillen, debug_str(*email));
+ return 1;
+ }
+ debug_mm("map_user: --\n");
+ return 0;
+}