[PATCH v4 15/28] fetch: add --update-shallow to accept refs that update .git/shallow
- From
Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
- Date
- Dec 5, 2013, 13:02 UTC
- Message-ID
- <1386248575-10206-16-git-send-email-pclouds@gmail.com>
- In-Reply-To
- <1386248575-10206-1-git-send-email-pclouds@gmail.com>
The same steps are done as in when --update-shallow is not given. The only difference is we now add all shallow commits in "ours" and "theirs" to .git/shallow (aka "step 8").
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> --- Documentation/fetch-options.txt | 6 ++++++ builtin/fetch.c | 6 +++++- fetch-pack.c | 27 +++++++++++++++++++++++++++ fetch-pack.h | 1 + t/t5536-fetch-shallow.sh | 32 ++++++++++++++++++++++++++++++++ transport.c | 4 ++++ transport.h | 4 ++++ 7 files changed, 79 insertions(+), 1 deletion(-)
diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt index a83d2b4..54043e3 100644 --- a/Documentation/fetch-options.txt +++ b/Documentation/fetch-options.txt @@ -21,6 +21,12 @@ If the source repository is shallow, fetch as much as possible so that the current repository has the same history as the source repository. +--update-shallow:: + By default when fetching from a shallow repository, + `git fetch` refuses refs that require updating + .git/shallow. This option updates .git/shallow and accept such + refs. + ifndef::git-pull[] --dry-run:: Show what would be done, without making any changes. diff --git a/builtin/fetch.c b/builtin/fetch.c index 7b41a7e..d2e4fc0 100644 --- a/builtin/fetch.c +++ b/builtin/fetch.c @@ -36,7 +36,7 @@ static int prune = -1; /* unspecified */ static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity; static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT; -static int tags = TAGS_DEFAULT, unshallow; +static int tags = TAGS_DEFAULT, unshallow, update_shallow; static const char *depth; static const char *upload_pack; static struct strbuf default_rla = STRBUF_INIT; @@ -104,6 +104,8 @@ static struct option builtin_fetch_options[] = { { OPTION_STRING, 0, "recurse-submodules-default", &recurse_submodules_default, NULL, N_("default mode for recursion"), PARSE_OPT_HIDDEN }, + OPT_BOOL(0, "update-shallow", &update_shallow, + N_("accept refs that update .git/shallow")), OPT_END() }; @@ -768,6 +770,8 @@ static struct transport *prepare_transport(struct remote *remote) set_option(transport, TRANS_OPT_KEEP, "yes"); if (depth) set_option(transport, TRANS_OPT_DEPTH, depth); + if (update_shallow) + set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes"); return transport; } diff --git a/fetch-pack.c b/fetch-pack.c index 7c11aff..cd219b8 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -993,6 +993,33 @@ static void update_shallow(struct fetch_pack_args *args, sha1_array_append(&ref, sought[i]->old_sha1); si->ref = &ref; + if (args->update_shallow) { + /* + * remote is also shallow, .git/shallow may be updated + * so all refs can be accepted. Make sure we only add + * shallow roots that are actually reachable from new + * refs. + */ + struct sha1_array extra = SHA1_ARRAY_INIT; + unsigned char (*sha1)[20] = si->shallow->sha1; + assign_shallow_commits_to_refs(si, NULL, NULL); + if (!si->nr_ours && !si->nr_theirs) { + sha1_array_clear(&ref); + return; + } + for (i = 0; i < si->nr_ours; i++) + sha1_array_append(&extra, sha1[si->ours[i]]); + for (i = 0; i < si->nr_theirs; i++) + sha1_array_append(&extra, sha1[si->theirs[i]]); + setup_alternate_shallow(&shallow_lock, + &alternate_shallow_file, + &extra); + commit_lock_file(&shallow_lock); + sha1_array_clear(&extra); + sha1_array_clear(&ref); + return; + } + /* * remote is also shallow, check what ref is safe to update * without updating .git/shallow diff --git a/fetch-pack.h b/fetch-pack.h index ce59537..ada02f5 100644 --- a/fetch-pack.h +++ b/fetch-pack.h @@ -23,6 +23,7 @@ struct fetch_pack_args { unsigned check_self_contained_and_connected:1; unsigned self_contained_and_connected:1; unsigned cloning:1; + unsigned update_shallow:1; }; /* diff --git a/t/t5536-fetch-shallow.sh b/t/t5536-fetch-shallow.sh index 022cb2c..3ae9092 100755 --- a/t/t5536-fetch-shallow.sh +++ b/t/t5536-fetch-shallow.sh @@ -141,4 +141,36 @@ EOF ) ' +test_expect_success 'fetch --update-shallow' ' + ( + cd shallow && + git checkout master && + commit 7 && + git tag -m foo heavy-tag HEAD^ && + git tag light-tag HEAD^:tracked + ) && + ( + cd notshallow && + git fetch --update-shallow ../shallow/.git refs/heads/*:refs/remotes/shallow/* && + git fsck && + git for-each-ref --sort=refname --format="%(refname)" >actual.refs && + cat <<EOF >expect.refs && +refs/remotes/shallow/master +refs/remotes/shallow/no-shallow +refs/tags/heavy-tag +refs/tags/light-tag +EOF + test_cmp expect.refs actual.refs && + git log --format=%s shallow/master >actual && + cat <<EOF >expect && +7 +6 +5 +4 +3 +EOF + test_cmp expect actual + ) +' + test_done diff --git a/transport.c b/transport.c index 491360b..a09fdb6 100644 --- a/transport.c +++ b/transport.c @@ -477,6 +477,9 @@ static int set_git_option(struct git_transport_options *opts, } else if (!strcmp(name, TRANS_OPT_KEEP)) { opts->keep = !!value; return 0; + } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) { + opts->update_shallow = !!value; + return 0; } else if (!strcmp(name, TRANS_OPT_DEPTH)) { if (!value) opts->depth = 0; @@ -543,6 +546,7 @@ static int fetch_refs_via_pack(struct transport *transport, args.check_self_contained_and_connected = data->options.check_self_contained_and_connected; args.cloning = transport->cloning; + args.update_shallow = data->options.update_shallow; if (!data->got_remote_heads) { connect_setup(transport, 0, 0); diff --git a/transport.h b/transport.h index 59842d4..02ea248 100644 --- a/transport.h +++ b/transport.h @@ -11,6 +11,7 @@ struct git_transport_options { unsigned followtags : 1; unsigned check_self_contained_and_connected : 1; unsigned self_contained_and_connected : 1; + unsigned update_shallow : 1; int depth; const char *uploadpack; const char *receivepack; @@ -152,6 +153,9 @@ struct transport *transport_get(struct remote *, const char *); /* Aggressively fetch annotated tags if possible */ #define TRANS_OPT_FOLLOWTAGS "followtags" +/* Accept refs that may update .git/shallow without --depth */ +#define TRANS_OPT_UPDATE_SHALLOW "updateshallow" + /** * Returns 0 if the option was used, non-zero otherwise. Prints a * message to stderr if the option is not used.
-- 1.8.5.1.25.g8667982