read-cache.c: refactor --ignore-missing implementation

Move lstat ENOENT handling from refresh_index to refresh_cache_ent and
activate it with a new CE_MATCH_IGNORE_MISSING option.  This will allow
other call paths into refresh_cache_ent to use the feature.

Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/cache.h b/cache.h
index 415d8830809cbb8a9651004184a01315ee8c7c3e..87429db0e4c1e6c80798ddad92b6c5cc5a0919ad 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -488,6 +488,8 @@ extern void *read_blob_data_from_index(struct index_state *, const char *, unsig
 #define CE_MATCH_RACY_IS_DIRTY         02
 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 #define CE_MATCH_IGNORE_SKIP_WORKTREE  04
+/* ignore non-existent files during stat update  */
+#define CE_MATCH_IGNORE_MISSING                0x08
 extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
 extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
 

diff --git a/read-cache.c b/read-cache.c
index c3d5e3543fae75c81a7a0a00c48bb0076675a2f1..bb38115a9dfb7d3745c25e18ab9ab4e9e54f87a3 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -1031,6 +1031,7 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
        int changed, size;
        int ignore_valid = options & CE_MATCH_IGNORE_VALID;
        int ignore_skip_worktree = options & CE_MATCH_IGNORE_SKIP_WORKTREE;
+       int ignore_missing = options & CE_MATCH_IGNORE_MISSING;
 
        if (ce_uptodate(ce))
                return ce;
@@ -1050,6 +1051,8 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
        }
 
        if (lstat(ce->name, &st) < 0) {
+               if (ignore_missing && errno == ENOENT)
+                       return ce;
                if (err)
                        *err = errno;
                return NULL;
@@ -1126,7 +1129,8 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
        int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0;
        int first = 1;
        int in_porcelain = (flags & REFRESH_IN_PORCELAIN);
-       unsigned int options = really ? CE_MATCH_IGNORE_VALID : 0;
+       unsigned int options = ((really ? CE_MATCH_IGNORE_VALID : 0) |
+                               (not_new ? CE_MATCH_IGNORE_MISSING : 0));
        const char *modified_fmt;
        const char *deleted_fmt;
        const char *typechange_fmt;
@@ -1175,8 +1179,6 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
                if (!new) {
                        const char *fmt;
 
-                       if (not_new && cache_errno == ENOENT)
-                               continue;
                        if (really && cache_errno == EINVAL) {
                                /* If we are doing --really-refresh that
                                 * means the index is not valid anymore.