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Ben Knoble" , Kristoffer Haugsbakk , Marc Branchaud , Phillip Wood , Harald Nordgren , Harald Nordgren From: Harald Nordgren Add a "fetch" mode to the "--track" option of "git checkout" / "git switch" that refreshes before checking it out: git checkout -b new_branch --track=fetch origin/some-branch is shorthand for git fetch origin some-branch git checkout -b new_branch --track origin/some-branch Identify the remote whose configured fetch refspec maps to using find_tracking_remote_for_ref() (the same lookup "--track" uses to pick which remote to record in branch..remote), then run "git fetch " for just that ref so other remote-tracking branches are left untouched. When is a bare (e.g. "origin"), follow refs/remotes//HEAD to learn which branch to refresh. If "git fetch" fails but the remote-tracking ref already exists locally, warn and proceed from the existing tip; otherwise abort. Signed-off-by: Harald Nordgren --- Documentation/git-checkout.adoc | 17 +- Documentation/git-switch.adoc | 5 +- builtin/checkout.c | 139 +++++++++++++++- t/t7201-co.sh | 276 ++++++++++++++++++++++++++++++++ 4 files changed, 430 insertions(+), 7 deletions(-) diff --git a/Documentation/git-checkout.adoc b/Documentation/git-checkout.adoc index a8b3b8c2e2..20b6cae60e 100644 --- a/Documentation/git-checkout.adoc +++ b/Documentation/git-checkout.adoc @@ -158,11 +158,26 @@ of it"). resets __ to the start point instead of failing. `-t`:: -`--track[=(direct|inherit)]`:: +`--track[=(direct|inherit|fetch)[,...]]`:: When creating a new branch, set up "upstream" configuration. See `--track` in linkgit:git-branch[1] for details. As a convenience, --track without -b implies branch creation. + +The argument is a comma-separated list. `direct` (the default) and +`inherit` select the tracking mode and are mutually exclusive. Adding +`fetch` requests that the remote be fetched before __ is +resolved, so the new branch starts from a fresh tip: when +__ is in _/_ form, only that branch is +updated; when __ is a bare __ (e.g. `origin`), the +branch named by _/HEAD_ is updated, and the checkout fails +with a hint to configure that symref if it is not set. The checkout +also fails if no configured remote's fetch refspec maps to +__, or if more than one does (in which case the `fetch` +cannot be unambiguously routed). If the fetch itself fails and the +corresponding remote-tracking ref already exists, a warning is printed +and the checkout proceeds from the existing tip; otherwise the checkout +is aborted. ++ If no `-b` option is given, the name of the new branch will be derived from the remote-tracking branch, by looking at the local part of the refspec configured for the corresponding remote, and then stripping diff --git a/Documentation/git-switch.adoc b/Documentation/git-switch.adoc index d6c4f229a5..a8730b1da8 100644 --- a/Documentation/git-switch.adoc +++ b/Documentation/git-switch.adoc @@ -155,10 +155,11 @@ variable. attached to a terminal, regardless of `--quiet`. `-t`:: -`--track[ (direct|inherit)]`:: +`--track[=(direct|inherit|fetch)[,...]]`:: When creating a new branch, set up "upstream" configuration. `-c` is implied. See `--track` in linkgit:git-branch[1] for - details. + details, and `--track` in linkgit:git-checkout[1] for the + `fetch` mode. + If no `-c` option is given, the name of the new branch will be derived from the remote-tracking branch, by looking at the local part of the diff --git a/builtin/checkout.c b/builtin/checkout.c index 1345e8574a..25b511f22a 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -25,10 +25,12 @@ #include "preload-index.h" #include "read-cache.h" #include "refs.h" +#include "refspec.h" #include "remote.h" #include "repo-settings.h" #include "resolve-undo.h" #include "revision.h" +#include "run-command.h" #include "sequencer.h" #include "setup.h" #include "strvec.h" @@ -62,6 +64,7 @@ struct checkout_opts { int count_checkout_paths; int overlay_mode; int dwim_new_local_branch; + int fetch; int discard_changes; int accept_ref; int accept_pathspec; @@ -115,6 +118,129 @@ struct branch_info { char *checkout; }; +static void fetch_remote_for_start_point(const char *arg, int quiet) +{ + struct strbuf dst = STRBUF_INIT; + struct tracking tracking; + struct string_list tracking_srcs = STRING_LIST_INIT_DUP; + struct string_list ambiguous_remotes = STRING_LIST_INIT_DUP; + struct child_process cmd = CHILD_PROCESS_INIT; + struct object_id oid; + struct remote *named_remote; + int bare_ns; + + strbuf_addf(&dst, "refs/remotes/%s", arg); + if (check_refname_format(dst.buf, 0)) + die(_("cannot fetch start-point '%s': not a valid " + "remote-tracking name"), arg); + + named_remote = remote_get(arg); + bare_ns = !strchr(arg, '/') || + (named_remote && remote_is_configured(named_remote, 1)); + if (bare_ns) { + char *head_path = xstrfmt("refs/remotes/%s/HEAD", arg); + const char *head_target = + refs_resolve_ref_unsafe(get_main_ref_store(the_repository), + head_path, + RESOLVE_REF_READING | + RESOLVE_REF_NO_RECURSE, + &oid, NULL); + if (head_target && + starts_with(head_target, dst.buf) && + head_target[dst.len] == '/' && + !check_refname_format(head_target, 0)) { + strbuf_reset(&dst); + strbuf_addstr(&dst, head_target); + bare_ns = 0; + } + free(head_path); + } + + memset(&tracking, 0, sizeof(tracking)); + tracking.spec.dst = dst.buf; + tracking.srcs = &tracking_srcs; + find_tracking_remote_for_ref(&tracking, &ambiguous_remotes); + + if (tracking.matches > 1) { + int status = die_message(_("cannot fetch start-point '%s': " + "fetch refspecs of multiple remotes " + "map to '%s'"), arg, dst.buf); + advise_ambiguous_fetch_refspec(dst.buf, &ambiguous_remotes); + exit(status); + } + + if (!tracking.matches) { + if (bare_ns && named_remote && + remote_is_configured(named_remote, 1)) + die(_("cannot fetch start-point '%s': " + "'refs/remotes/%s/HEAD' is not set; run " + "'git remote set-head %s --auto' to set it"), + arg, arg, arg); + die(_("cannot fetch start-point '%s': no configured remote's " + "fetch refspec matches it"), arg); + } + + strvec_push(&cmd.args, "fetch"); + if (quiet) + strvec_push(&cmd.args, "--quiet"); + strvec_pushl(&cmd.args, tracking.remote, + tracking_srcs.items[0].string, NULL); + cmd.git_cmd = 1; + if (run_command(&cmd)) { + if (!refs_read_ref(get_main_ref_store(the_repository), + dst.buf, &oid)) + warning(_("failed to fetch start-point '%s'; " + "using existing '%s'"), arg, dst.buf); + else + die(_("failed to fetch start-point '%s'"), arg); + } + + string_list_clear(&tracking_srcs, 0); + string_list_clear(&ambiguous_remotes, 0); + strbuf_release(&dst); +} + +static int parse_opt_checkout_track(const struct option *opt, + const char *arg, int unset) +{ + struct checkout_opts *opts = opt->value; + struct string_list tokens = STRING_LIST_INIT_DUP; + struct string_list_item *item; + int saw_direct = 0; + int ret = 0; + + opts->fetch = 0; + if (unset) { + opts->track = BRANCH_TRACK_NEVER; + return 0; + } + opts->track = BRANCH_TRACK_EXPLICIT; + if (!arg) + return 0; + + string_list_split(&tokens, arg, ",", -1); + for_each_string_list_item(item, &tokens) { + if (!strcmp(item->string, "fetch")) + opts->fetch = 1; + else if (!strcmp(item->string, "direct")) + saw_direct = 1; + else if (!strcmp(item->string, "inherit")) + opts->track = BRANCH_TRACK_INHERIT; + else { + ret = error(_("option `%s' expects \"%s\", \"%s\", " + "or \"%s\""), + "--track", "direct", "inherit", "fetch"); + goto out; + } + } + if (saw_direct && opts->track == BRANCH_TRACK_INHERIT) + ret = error(_("option `%s' cannot combine \"%s\" and \"%s\""), + "--track", "direct", "inherit"); +out: + string_list_clear(&tokens, 0); + return ret; +} + static void branch_info_release(struct branch_info *info) { free(info->name); @@ -1733,10 +1859,10 @@ static struct option *add_common_switch_branch_options( { struct option options[] = { OPT_BOOL('d', "detach", &opts->force_detach, N_("detach HEAD at named commit")), - OPT_CALLBACK_F('t', "track", &opts->track, "(direct|inherit)", + OPT_CALLBACK_F('t', "track", opts, "(direct|inherit|fetch)[,...]", N_("set branch tracking configuration"), PARSE_OPT_OPTARG, - parse_opt_tracking_mode), + parse_opt_checkout_track), OPT__FORCE(&opts->force, N_("force checkout (throw away local modifications)"), PARSE_OPT_NOCOMPLETE), OPT_STRING(0, "orphan", &opts->new_orphan_branch, N_("new-branch"), N_("new unborn branch")), @@ -1941,8 +2067,13 @@ static int checkout_main(int argc, const char **argv, const char *prefix, opts->dwim_new_local_branch && opts->track == BRANCH_TRACK_UNSPECIFIED && !opts->new_branch; - int n = parse_branchname_arg(argc, argv, dwim_ok, which_command, - &new_branch_info, opts, &rev); + int n; + + if (opts->fetch) + fetch_remote_for_start_point(argv[0], opts->quiet); + + n = parse_branchname_arg(argc, argv, dwim_ok, which_command, + &new_branch_info, opts, &rev); argv += n; argc -= n; } else if (!opts->accept_ref && opts->from_treeish) { diff --git a/t/t7201-co.sh b/t/t7201-co.sh index 7613b1d2a4..1e321b1512 100755 --- a/t/t7201-co.sh +++ b/t/t7201-co.sh @@ -870,4 +870,280 @@ test_expect_success 'tracking info copied with autoSetupMerge=inherit' ' test_cmp_config "" --default "" branch.main2.merge ' +test_expect_success 'setup upstream for --track=fetch tests' ' + git checkout main && + git init fetch_upstream && + test_commit -C fetch_upstream u_main && + git remote add fetch_upstream fetch_upstream && + git fetch fetch_upstream && + git -C fetch_upstream checkout -b fetch_new && + test_commit -C fetch_upstream u_new +' + +test_expect_success 'checkout --track=fetch -b picks up branch created upstream after clone' ' + git checkout main && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_new && + git checkout --track=fetch -b local_new fetch_upstream/fetch_new && + test_cmp_rev refs/remotes/fetch_upstream/fetch_new HEAD && + test_cmp_config fetch_upstream branch.local_new.remote && + test_cmp_config refs/heads/fetch_new branch.local_new.merge +' + +test_expect_success 'checkout --track=fetch / leaves other tracking branches untouched' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_target && + test_commit -C fetch_upstream u_target_pre && + git -C fetch_upstream checkout -b fetch_other && + test_commit -C fetch_upstream u_other_pre && + git fetch fetch_upstream && + other_before=$(git rev-parse refs/remotes/fetch_upstream/fetch_other) && + git -C fetch_upstream checkout fetch_target && + test_commit -C fetch_upstream u_target_post && + git -C fetch_upstream checkout fetch_other && + test_commit -C fetch_upstream u_other_post && + git checkout --track=fetch -b local_target fetch_upstream/fetch_target && + test_cmp_rev refs/remotes/fetch_upstream/fetch_target HEAD && + test "$(git rev-parse refs/remotes/fetch_upstream/fetch_other)" = "$other_before" +' + +test_expect_success 'checkout --track=fetch with bare remote name fetches only /HEAD target' ' + git checkout main && + git -C fetch_upstream checkout main && + git remote set-head fetch_upstream main && + git -C fetch_upstream checkout -b fetch_unrelated && + test_commit -C fetch_upstream u_unrelated_pre && + git fetch fetch_upstream fetch_unrelated && + unrelated_before=$(git rev-parse refs/remotes/fetch_upstream/fetch_unrelated) && + git -C fetch_upstream checkout main && + test_commit -C fetch_upstream u_main_post && + git -C fetch_upstream checkout fetch_unrelated && + test_commit -C fetch_upstream u_unrelated_post && + git checkout --track=fetch -b local_from_remote fetch_upstream && + test_cmp_rev refs/remotes/fetch_upstream/main HEAD && + test "$(git rev-parse refs/remotes/fetch_upstream/fetch_unrelated)" = "$unrelated_before" +' + +test_expect_success 'checkout --track=fetch aborts and does not create branch when no existing ref' ' + git checkout main && + test_might_fail git branch -D bogus && + test_must_fail git checkout --track=fetch -b bogus fetch_upstream/does_not_exist && + test_must_fail git rev-parse --verify refs/heads/bogus +' + +test_expect_success 'checkout --track=fetch warns and proceeds when fetch fails but ref exists' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_offline && + test_commit -C fetch_upstream u_offline && + git fetch fetch_upstream fetch_offline && + saved_url=$(git config remote.fetch_upstream.url) && + test_when_finished "git config remote.fetch_upstream.url \"$saved_url\"" && + git config remote.fetch_upstream.url ./does-not-exist && + git checkout --track=fetch -b local_offline fetch_upstream/fetch_offline 2>err && + test_grep "failed to fetch" err && + test_cmp_rev refs/remotes/fetch_upstream/fetch_offline HEAD +' + +test_expect_success 'checkout --track=fetch resolves through configured fetch refspec' ' + git checkout main && + git remote add fetch_custom ./fetch_upstream && + test_when_finished "git remote remove fetch_custom" && + git config --replace-all remote.fetch_custom.fetch \ + "+refs/heads/*:refs/remotes/custom-ns/*" && + git -C fetch_upstream checkout -b fetch_refspec && + test_commit -C fetch_upstream u_refspec && + test_must_fail git rev-parse --verify refs/remotes/custom-ns/fetch_refspec && + git checkout --track=fetch -b local_refspec custom-ns/fetch_refspec && + test_cmp_rev refs/remotes/custom-ns/fetch_refspec HEAD +' + +test_expect_success 'checkout --track=fetch on namespace bare name follows /HEAD' ' + git checkout main && + git remote add fetch_ns ./fetch_upstream && + test_when_finished "git remote remove fetch_ns" && + test_when_finished "git update-ref -d refs/remotes/ns_alias/HEAD" && + git config --replace-all remote.fetch_ns.fetch \ + "+refs/heads/*:refs/remotes/ns_alias/*" && + git fetch fetch_ns && + git symbolic-ref refs/remotes/ns_alias/HEAD refs/remotes/ns_alias/main && + git -C fetch_upstream checkout main && + test_commit -C fetch_upstream u_ns_post && + git checkout --track=fetch -b local_ns ns_alias && + test_cmp_rev refs/remotes/ns_alias/main HEAD && + test_cmp_config fetch_ns branch.local_ns.remote && + test_cmp_config refs/heads/main branch.local_ns.merge +' + +test_expect_success '--track=fetch on bare hierarchical remote name follows /HEAD' ' + git checkout main && + git remote add nested/bare ./fetch_upstream && + test_when_finished "git remote remove nested/bare" && + test_when_finished "git update-ref -d refs/remotes/nested/bare/HEAD" && + git fetch nested/bare && + git symbolic-ref refs/remotes/nested/bare/HEAD \ + refs/remotes/nested/bare/main && + git -C fetch_upstream checkout main && + test_commit -C fetch_upstream u_nested_bare_post && + git checkout --track=fetch -b local_nested_bare nested/bare && + test_cmp_rev refs/remotes/nested/bare/main HEAD +' + +test_expect_success 'checkout --track=fetch handles hierarchical remote name' ' + git checkout main && + git remote add nested/remote ./fetch_upstream && + test_when_finished "git remote remove nested/remote" && + git -C fetch_upstream checkout -b fetch_hier && + test_commit -C fetch_upstream u_hier && + test_must_fail git rev-parse --verify refs/remotes/nested/remote/fetch_hier && + git checkout --track=fetch -b local_hier nested/remote/fetch_hier && + test_cmp_rev refs/remotes/nested/remote/fetch_hier HEAD +' + +test_expect_success 'checkout --track=fetch dies on bare remote name with no /HEAD' ' + git checkout main && + git remote add fetch_nohead ./fetch_upstream && + test_when_finished "git remote remove fetch_nohead" && + test_might_fail git symbolic-ref -d refs/remotes/fetch_nohead/HEAD && + test_must_fail git checkout --track=fetch -b local_nohead fetch_nohead 2>err && + test_grep "refs/remotes/fetch_nohead/HEAD" err && + test_grep "git remote set-head fetch_nohead --auto" err && + test_must_fail git rev-parse --verify refs/heads/local_nohead +' + +test_expect_success 'checkout --track=fetch on bare unknown name does not suggest set-head' ' + git checkout main && + test_must_fail git rev-parse --verify refs/remotes/no_such_ns/HEAD && + test_must_fail git config --get remote.no_such_ns.url && + test_must_fail git checkout --track=fetch -b local_unknown no_such_ns 2>err && + test_grep "no configured remote" err && + test_grep ! "set-head" err && + test_must_fail git rev-parse --verify refs/heads/local_unknown +' + +test_expect_success 'checkout --track=fetch rejects /HEAD pointing outside namespace' ' + git checkout main && + git remote add fetch_crossns ./fetch_upstream && + test_when_finished "git remote remove fetch_crossns" && + test_when_finished "git update-ref -d refs/remotes/fetch_crossns/HEAD" && + git fetch fetch_crossns && + git symbolic-ref refs/remotes/fetch_crossns/HEAD \ + refs/remotes/fetch_upstream/u_main && + test_must_fail git checkout --track=fetch -b local_crossns fetch_crossns 2>err && + test_grep "refs/remotes/fetch_crossns/HEAD" err && + test_must_fail git rev-parse --verify refs/heads/local_crossns +' + +test_expect_success 'checkout --track=fetch dies on ambiguous fetch refspec match' ' + git checkout main && + git remote add fetch_ambig_a ./fetch_upstream && + git remote add fetch_ambig_b ./fetch_upstream && + test_when_finished "git remote remove fetch_ambig_a" && + test_when_finished "git remote remove fetch_ambig_b" && + git config --replace-all remote.fetch_ambig_a.fetch \ + "+refs/heads/*:refs/remotes/ambig_ns/*" && + git config --replace-all remote.fetch_ambig_b.fetch \ + "+refs/heads/*:refs/remotes/ambig_ns/*" && + git -C fetch_upstream checkout -b fetch_ambig && + test_commit -C fetch_upstream u_ambig && + test_must_fail git checkout --track=fetch -b local_ambig ambig_ns/fetch_ambig 2>err && + test_grep "fetch_ambig_a" err && + test_grep "fetch_ambig_b" err && + test_grep "tracking namespaces" err && + test_must_fail git rev-parse --verify refs/heads/local_ambig +' + +test_expect_success 'checkout --track=fetch rejects invalid refname components' ' + git checkout main && + test_must_fail git checkout --track=fetch -b local_invalid "foo..bar" 2>err && + test_grep "valid" err && + test_must_fail git rev-parse --verify refs/heads/local_invalid +' + +test_expect_success 'checkout --track=fetch,inherit rejects invalid refname components' ' + git checkout main && + test_must_fail git checkout --track=fetch,inherit -b local_invalid \ + "foo..bar" 2>err && + test_grep "valid" err && + test_must_fail git rev-parse --verify refs/heads/local_invalid +' + +test_expect_success 'checkout --track=inherit,direct is rejected' ' + test_must_fail git checkout --track=inherit,direct -b bad fetch_upstream/fetch_new 2>err && + test_grep "cannot combine" err +' + +test_expect_success 'checkout --track=direct,inherit is rejected' ' + test_must_fail git checkout --track=direct,inherit -b bad fetch_upstream/fetch_new 2>err && + test_grep "cannot combine" err +' + +test_expect_success 'checkout --track=fetch then --track=direct drops fetch (last-one-wins)' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_lastwin && + test_commit -C fetch_upstream u_lastwin && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_lastwin && + test_must_fail git checkout --track=fetch --track=direct \ + -b local_lastwin fetch_upstream/fetch_lastwin && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_lastwin +' + +test_expect_success 'checkout --track=fetch then --no-track drops fetch' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_notrack && + test_commit -C fetch_upstream u_notrack && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_notrack && + test_must_fail git checkout --track=fetch --no-track \ + -b local_notrack fetch_upstream/fetch_notrack && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_notrack +' + +test_expect_success 'checkout --track=fetch,inherit fetches remote-tracking start-point' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_inherit && + test_commit -C fetch_upstream u_inherit && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_inherit && + git checkout --track=fetch,inherit -b local_inherit \ + fetch_upstream/fetch_inherit && + test_cmp_rev refs/remotes/fetch_upstream/fetch_inherit HEAD +' + +test_expect_success 'checkout --track=fetch,inherit errors when start-point does not map to a remote' ' + git checkout main && + test_must_fail git checkout --track=fetch,inherit -b bad main 2>err && + test_grep "no configured remote" err && + test_must_fail git rev-parse --verify refs/heads/bad +' + +test_expect_success 'checkout --track=fetch on local start-point errors' ' + git checkout main && + test_must_fail git checkout --track=fetch -b bad main 2>err && + test_grep "no configured remote" err && + test_must_fail git rev-parse --verify refs/heads/bad +' + +test_expect_success 'checkout --track=bogus reports an error' ' + git checkout main && + test_must_fail git checkout --track=bogus -b bogus_branch fetch_upstream/fetch_new 2>err && + test_grep "expects" err +' + +test_expect_success 'checkout -q --track=fetch silences the fetch output' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_quiet && + test_commit -C fetch_upstream u_quiet && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_quiet && + git checkout -q --track=fetch -b local_quiet \ + fetch_upstream/fetch_quiet 2>err && + test_grep ! "-> fetch_upstream/fetch_quiet" err && + test_cmp_rev refs/remotes/fetch_upstream/fetch_quiet HEAD +' + +test_expect_success 'switch --track=fetch -c picks up branch created upstream after clone' ' + git checkout main && + git -C fetch_upstream checkout -b fetch_switch && + test_commit -C fetch_upstream u_switch && + test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_switch && + git switch --track=fetch -c local_switch fetch_upstream/fetch_switch && + test_cmp_rev refs/remotes/fetch_upstream/fetch_switch HEAD +' + test_done -- gitgitgadget