[PATCH v6 03/13] update-index: move add_cacheinfo() to read-cache.c

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This moves the function add_cacheinfo() that already exists in
update-index.c to update-index.c, renames it add_to_index_cacheinfo(),
and adds an `istate' parameter.  The new cache entry is returned through
a pointer passed in the parameters.  The return value is either 0
(success), -1 (invalid path), or -2 (failed to add the file in the
index).

This will become useful in the next commit, when the three-way merge
will need to call this function.

Signed-off-by: Alban Gruin <alban.gruin@xxxxxxxxx>
---
 builtin/update-index.c | 25 +++++++------------------
 cache.h                |  5 +++++
 read-cache.c           | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index 79087bccea..44862f5e1d 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -404,27 +404,16 @@ static int process_path(const char *path, struct stat *st, int stat_errno)
 static int add_cacheinfo(unsigned int mode, const struct object_id *oid,
 			 const char *path, int stage)
 {
-	int len, option;
-	struct cache_entry *ce;
+	int res;
 
-	if (!verify_path(path, mode))
-		return error("Invalid path '%s'", path);
-
-	len = strlen(path);
-	ce = make_empty_cache_entry(&the_index, len);
-
-	oidcpy(&ce->oid, oid);
-	memcpy(ce->name, path, len);
-	ce->ce_flags = create_ce_flags(stage);
-	ce->ce_namelen = len;
-	ce->ce_mode = create_ce_mode(mode);
-	if (assume_unchanged)
-		ce->ce_flags |= CE_VALID;
-	option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
-	option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
-	if (add_cache_entry(ce, option))
+	res = add_to_index_cacheinfo(&the_index, mode, oid, path, stage,
+				     allow_add, allow_replace, NULL);
+	if (res == -1)
+		return res;
+	if (res == -2)
 		return error("%s: cannot add to the index - missing --add option?",
 			     path);
+
 	report("add '%s'", path);
 	return 0;
 }
diff --git a/cache.h b/cache.h
index c0072d43b1..be16ab3215 100644
--- a/cache.h
+++ b/cache.h
@@ -830,6 +830,11 @@ int remove_file_from_index(struct index_state *, const char *path);
 int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 int add_file_to_index(struct index_state *, const char *path, int flags);
 
+int add_to_index_cacheinfo(struct index_state *, unsigned int mode,
+			   const struct object_id *oid, const char *path,
+			   int stage, int allow_add, int allow_replace,
+			   struct cache_entry **pce);
+
 int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
 int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
 void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
diff --git a/read-cache.c b/read-cache.c
index ecf6f68994..c25f951db4 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1350,6 +1350,41 @@ int add_index_entry(struct index_state *istate, struct cache_entry *ce, int opti
 	return 0;
 }
 
+int add_to_index_cacheinfo(struct index_state *istate, unsigned int mode,
+			   const struct object_id *oid, const char *path,
+			   int stage, int allow_add, int allow_replace,
+			   struct cache_entry **pce)
+{
+	int len, option;
+	struct cache_entry *ce = NULL;
+
+	if (!verify_path(path, mode))
+		return error(_("Invalid path '%s'"), path);
+
+	len = strlen(path);
+	ce = make_empty_cache_entry(istate, len);
+
+	oidcpy(&ce->oid, oid);
+	memcpy(ce->name, path, len);
+	ce->ce_flags = create_ce_flags(stage);
+	ce->ce_namelen = len;
+	ce->ce_mode = create_ce_mode(mode);
+	if (assume_unchanged)
+		ce->ce_flags |= CE_VALID;
+	option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
+	option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
+
+	if (add_index_entry(istate, ce, option)) {
+		discard_cache_entry(ce);
+		return -2;
+	}
+
+	if (pce)
+		*pce = ce;
+
+	return 0;
+}
+
 /*
  * "refresh" does not calculate a new sha1 file or bring the
  * cache up-to-date for mode/content changes. But what it
-- 
2.29.2.260.ge31aba42fb




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