| 1 | #include "git-compat-util.h" |
| 2 | #include "abspath.h" |
| 3 | #include "chdir-notify.h" |
| 4 | #include "list.h" |
| 5 | #include "path.h" |
| 6 | #include "strbuf.h" |
| 7 | #include "trace.h" |
| 8 | |
| 9 | struct chdir_notify_entry { |
| 10 | const char *name; |
| 11 | chdir_notify_callback cb; |
| 12 | void *data; |
| 13 | struct list_head list; |
| 14 | }; |
| 15 | static LIST_HEAD(chdir_notify_entries); |
| 16 | |
| 17 | void chdir_notify_register(const char *name, |
| 18 | chdir_notify_callback cb, |
| 19 | void *data) |
| 20 | { |
| 21 | struct chdir_notify_entry *e = xmalloc(sizeof(*e)); |
| 22 | e->name = name; |
| 23 | e->cb = cb; |
| 24 | e->data = data; |
| 25 | list_add_tail(&e->list, &chdir_notify_entries); |
| 26 | } |
| 27 | |
| 28 | void chdir_notify_unregister(const char *name, chdir_notify_callback cb, |
| 29 | void *data) |
| 30 | { |
| 31 | struct list_head *pos, *p; |
| 32 | |
| 33 | list_for_each_safe(pos, p, &chdir_notify_entries) { |
| 34 | struct chdir_notify_entry *e = |
| 35 | list_entry(pos, struct chdir_notify_entry, list); |
| 36 | |
| 37 | if (e->cb != cb || e->data != data || !e->name != !name || |
| 38 | (e->name && strcmp(e->name, name))) |
| 39 | continue; |
| 40 | |
| 41 | list_del(pos); |
| 42 | free(e); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | int chdir_notify(const char *new_cwd) |
| 47 | { |
| 48 | struct strbuf old_cwd = STRBUF_INIT; |
| 49 | struct list_head *pos; |
| 50 | |
| 51 | if (strbuf_getcwd(&old_cwd) < 0) |
| 52 | return -1; |
| 53 | if (chdir(new_cwd) < 0) { |
| 54 | int saved_errno = errno; |
| 55 | strbuf_release(&old_cwd); |
| 56 | errno = saved_errno; |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | trace_printf_key(&trace_setup_key, |
| 61 | "setup: chdir from '%s' to '%s'", |
| 62 | old_cwd.buf, new_cwd); |
| 63 | |
| 64 | list_for_each(pos, &chdir_notify_entries) { |
| 65 | struct chdir_notify_entry *e = |
| 66 | list_entry(pos, struct chdir_notify_entry, list); |
| 67 | e->cb(e->name, old_cwd.buf, new_cwd, e->data); |
| 68 | } |
| 69 | |
| 70 | strbuf_release(&old_cwd); |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | char *reparent_relative_path(const char *old_cwd, |
| 75 | const char *new_cwd, |
| 76 | const char *path) |
| 77 | { |
| 78 | char *ret, *full; |
| 79 | |
| 80 | if (is_absolute_path(path)) |
| 81 | return xstrdup(path); |
| 82 | |
| 83 | full = xstrfmt("%s/%s", old_cwd, path); |
| 84 | ret = xstrdup(remove_leading_path(full, new_cwd)); |
| 85 | free(full); |
| 86 | |
| 87 | return ret; |
| 88 | } |