It is not a good idea to compare kernel versions and disable
the untracked cache if it changes as people may upgrade and
still want the untracked cache to work. So let's just
compare work tree locations and kernel name to decide if we
should disable it.
Also it's not useful to store many locations in the ident
field and compare to any of them. It can even be dangerous
if GIT_WORK_TREE is used with different values. So let's
just store one location, the location of the current work
tree.
If this location changed and we still want an untracked
cache, let's delete the cache and recreate it.
Note that if an untracked cache has been created by a
previous Git version, then the kernel version is stored in
the ident field. As we now compare with just the kernel
name the comparison will fail and the untracked cache will
be disabled until it's recreated.
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Helped-by: Torsten Bögershausen <tboegi@xxxxxx>
---
dir.c | 39 ++++++++++++++++++++++++---------------
dir.h | 1 -
2 files changed, 24 insertions(+), 16 deletions(-)
diff --git a/dir.c b/dir.c
index 0d069c9..42d3b6b 100644
--- a/dir.c
+++ b/dir.c
@@ -1913,28 +1913,31 @@ static const char *get_ident_string(void)
return sb.buf;
if (uname(&uts) < 0)
die_errno(_("failed to get kernel name and information"));
- strbuf_addf(&sb, "Location %s, system %s %s %s", get_git_work_tree(),
- uts.sysname, uts.release, uts.version);
+ strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
+ uts.sysname);
return sb.buf;
}
static int ident_in_untracked(const struct untracked_cache *uc)
{
- const char *end = uc->ident.buf + uc->ident.len;
- const char *p = uc->ident.buf;
+ /*
+ * Previous git versions may have saved many NUL separated
+ * strings in the "ident" field, but it is insane to manage
+ * many locations, so just take care of the first one.
+ */
- for (p = uc->ident.buf; p < end; p += strlen(p) + 1)
- if (!strcmp(p, get_ident_string()))
- return 1;
- return 0;
+ return !strcmp(uc->ident.buf, get_ident_string());
}
-void add_untracked_ident(struct untracked_cache *uc)
+static void set_untracked_ident(struct untracked_cache *uc)
{
- if (ident_in_untracked(uc))
- return;
+ strbuf_reset(&uc->ident);
strbuf_addstr(&uc->ident, get_ident_string());
- /* this strbuf contains a list of strings, save NUL too */
+
+ /*
+ * This strbuf used to contain a list of NUL separated
+ * strings, so save NUL too for backward compatibility.
+ */
strbuf_addch(&uc->ident, 0);
}
@@ -1945,15 +1948,21 @@ static void new_untracked_cache(struct index_state *istate)
uc->exclude_per_dir = ".gitignore";
/* should be the same flags used by git-status */
uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
+ set_untracked_ident(uc);
istate->untracked = uc;
+ istate->cache_changed |= UNTRACKED_CHANGED;
}
void add_untracked_cache(struct index_state *istate)
{
if (!istate->untracked) {
new_untracked_cache(istate);
- add_untracked_ident(istate->untracked);
- istate->cache_changed |= UNTRACKED_CHANGED;
+ } else {
+ if (!ident_in_untracked(istate->untracked)) {
+ free_untracked_cache(istate->untracked);
+ new_untracked_cache(istate);
+ }
+ }
}
void remove_untracked_cache(struct index_state *istate)
@@ -2022,7 +2031,7 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
return NULL;
if (!ident_in_untracked(dir->untracked)) {
- warning(_("Untracked cache is disabled on this system."));
+ warning(_("Untracked cache is disabled on this system or location."));
return NULL;
}
diff --git a/dir.h b/dir.h
index a3dacdb..cd46f30 100644
--- a/dir.h
+++ b/dir.h
@@ -307,7 +307,6 @@ void untracked_cache_add_to_index(struct index_state *, const char *);
void free_untracked_cache(struct untracked_cache *);
struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz);
void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked);
-void add_untracked_ident(struct untracked_cache *);
void add_untracked_cache(struct index_state *istate);
void remove_untracked_cache(struct index_state *istate);
#endif
--
2.7.0.36.g20612a7
--
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