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#include "cache.h"
#include "chdir-notify.h"
#include "list.h"
#include "strbuf.h"
struct chdir_notify_entry {
const char *name;
chdir_notify_callback cb;
void *data;
struct list_head list;
};
static LIST_HEAD(chdir_notify_entries);
void chdir_notify_register(const char *name,
chdir_notify_callback cb,
void *data)
{
struct chdir_notify_entry *e = xmalloc(sizeof(*e));
e->name = name;
e->cb = cb;
e->data = data;
list_add_tail(&e->list, &chdir_notify_entries);
}
static void reparent_cb(const char *name,
const char *old_cwd,
const char *new_cwd,
void *data)
{
char **path = data;
char *tmp = *path;
if (!tmp)
return;
*path = reparent_relative_path(old_cwd, new_cwd, tmp);
free(tmp);
if (name) {
trace_printf_key(&trace_setup_key,
"setup: reparent %s to '%s'",
name, *path);
}
}
void chdir_notify_reparent(const char *name, char **path)
{
chdir_notify_register(name, reparent_cb, path);
}
int chdir_notify(const char *new_cwd)
{
struct strbuf old_cwd = STRBUF_INIT;
struct list_head *pos;
if (strbuf_getcwd(&old_cwd) < 0)
return -1;
if (chdir(new_cwd) < 0) {
int saved_errno = errno;
strbuf_release(&old_cwd);
errno = saved_errno;
return -1;
}
trace_printf_key(&trace_setup_key,
"setup: chdir from '%s' to '%s'",
old_cwd.buf, new_cwd);
list_for_each(pos, &chdir_notify_entries) {
struct chdir_notify_entry *e =
list_entry(pos, struct chdir_notify_entry, list);
e->cb(e->name, old_cwd.buf, new_cwd, e->data);
}
strbuf_release(&old_cwd);
return 0;
}
char *reparent_relative_path(const char *old_cwd,
const char *new_cwd,
const char *path)
{
char *ret, *full;
if (is_absolute_path(path))
return xstrdup(path);
full = xstrfmt("%s/%s", old_cwd, path);
ret = xstrdup(remove_leading_path(full, new_cwd));
free(full);
return ret;
}