fetch --all/--multiple: keep all the fetched branch information
Since "git fetch" learned "--all" and "--multiple" options, it has become
tempting for users to say "git pull --all". Even though it may fetch from
remotes that do not need to be fetched from for merging with the current
branch, it is handy.
"git fetch" however clears the list of fetched branches every time it
contacts a different remote. Unless the current branch is configured to
merge with a branch from a remote that happens to be the last in the list
of remotes that are contacted, "git pull" that fetches from multiple
remotes will not be able to find the branch it should be merging with.
Make "fetch" clear FETCH_HEAD (unless --append is given) and then append
the list of branches fetched to it (even when --append is not given). That
way, "pull" will be able to find the data for the branch being merged in
FETCH_HEAD no matter where the remote appears in the list of remotes to be
contacted by "git fetch".
Reported-by: Michael Lukashov
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-fetch.c b/builtin-fetch.c
index 61b2e40..b059d65 100644
--- a/builtin-fetch.c
+++ b/builtin-fetch.c
@@ -651,6 +651,17 @@
"of non-bare repository", current_branch->refname);
}
+static int truncate_fetch_head(void)
+{
+ char *filename = git_path("FETCH_HEAD");
+ FILE *fp = fopen(filename, "w");
+
+ if (!fp)
+ return error("cannot open %s: %s\n", filename, strerror(errno));
+ fclose(fp);
+ return 0;
+}
+
static int do_fetch(struct transport *transport,
struct refspec *refs, int ref_count)
{
@@ -672,11 +683,9 @@
/* if not appending, truncate FETCH_HEAD */
if (!append && !dry_run) {
- char *filename = git_path("FETCH_HEAD");
- FILE *fp = fopen(filename, "w");
- if (!fp)
- return error("cannot open %s: %s\n", filename, strerror(errno));
- fclose(fp);
+ int errcode = truncate_fetch_head();
+ if (errcode)
+ return errcode;
}
ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
@@ -784,8 +793,8 @@
static int fetch_multiple(struct string_list *list)
{
int i, result = 0;
- const char *argv[10] = { "fetch" };
- int argc = 1;
+ const char *argv[11] = { "fetch", "--append" };
+ int argc = 2;
if (dry_run)
argv[argc++] = "--dry-run";
@@ -804,6 +813,12 @@
else if (verbosity < 0)
argv[argc++] = "-q";
+ if (!append && !dry_run) {
+ int errcode = truncate_fetch_head();
+ if (errcode)
+ return errcode;
+ }
+
for (i = 0; i < list->nr; i++) {
const char *name = list->items[i].string;
argv[argc] = name;
diff --git a/t/t5521-pull-options.sh b/t/t5521-pull-options.sh
index 84059d8..1b06691 100755
--- a/t/t5521-pull-options.sh
+++ b/t/t5521-pull-options.sh
@@ -72,4 +72,22 @@
)
'
+test_expect_success 'git pull --all' '
+ mkdir clonedmulti &&
+ (cd clonedmulti && git init &&
+ cat >>.git/config <<-\EOF &&
+ [remote "one"]
+ url = ../parent
+ fetch = refs/heads/*:refs/remotes/one/*
+ [remote "two"]
+ url = ../parent
+ fetch = refs/heads/*:refs/remotes/two/*
+ [branch "master"]
+ remote = one
+ merge = refs/heads/master
+ EOF
+ git pull --all
+ )
+'
+
test_done
