Introduce set_index_file() to be able to temporarily change the index file.
It should be used like this:
/* Save current index file */
old_index_file = get_index_file();
set_index_file((char *)tmp_index_file);
/* Do stuff that will use tmp_index_file as the index file */
...
/* When finished reset the index file */
set_index_file(old_index_file);
It is intended to be used by builtins commands, in fact `git am`, to
temporarily change the index file used by libified code.
This is useful when libified code uses the global index, but a builtin
command wants another index file to be used instead.
And yeah this is a short cut and this new function should not be used
by other code.
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
cache.h | 1 +
environment.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/cache.h b/cache.h
index b5f76a4..18b96fe 100644
--- a/cache.h
+++ b/cache.h
@@ -461,6 +461,7 @@ extern int is_inside_work_tree(void);
extern const char *get_git_dir(void);
extern const char *get_git_common_dir(void);
extern char *get_object_directory(void);
+extern void set_index_file(char *index_file);
extern char *get_index_file(void);
extern char *get_graft_file(void);
extern int set_git_dir(const char *path);
diff --git a/environment.c b/environment.c
index ca72464..eb23d01 100644
--- a/environment.c
+++ b/environment.c
@@ -292,6 +292,18 @@ int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
}
+/*
+ * Temporarily change the index file.
+ * Please save the current index file using get_index_file() before changing
+ * the index file. And when finished, reset it to the saved value.
+ * Yeah, the libification of 'apply' took a short-circuit by adding this
+ * technical debt; please do not call this function in new codepaths.
+ */
+void set_index_file(char *index_file)
+{
+ git_index_file = index_file;
+}
+
char *get_index_file(void)
{
if (!git_index_file)
--
2.9.2.558.gf53e569
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