From d3115660b4cc4b1a32e77ddfd289afde5e4b94d8 Mon Sep 17 00:00:00 2001 From: Josh Steadmon Date: Mon, 20 Dec 2021 19:30:23 -0800 Subject: branch: add flags and config to inherit tracking It can be helpful when creating a new branch to use the existing tracking configuration from the branch point. However, there is currently not a method to automatically do so. Teach git-{branch,checkout,switch} an "inherit" argument to the "--track" option. When this is set, creating a new branch will cause the tracking configuration to default to the configuration of the branch point, if set. For example, if branch "main" tracks "origin/main", and we run `git checkout --track=inherit -b feature main`, then branch "feature" will track "origin/main". Thus, `git status` will show us how far ahead/behind we are from origin, and `git pull` will pull from origin. This is particularly useful when creating branches across many submodules, such as with `git submodule foreach ...` (or if running with a patch such as [1], which we use at $job), as it avoids having to manually set tracking info for each submodule. Since we've added an argument to "--track", also add "--track=direct" as another way to explicitly get the original "--track" behavior ("--track" without an argument still works as well). Finally, teach branch.autoSetupMerge a new "inherit" option. When this is set, "--track=inherit" becomes the default behavior. [1]: https://lore.kernel.org/git/20180927221603.148025-1-sbeller@google.com/ Signed-off-by: Josh Steadmon Signed-off-by: Junio C Hamano diff --git a/Documentation/config/branch.txt b/Documentation/config/branch.txt index cc5f324..55f7522 100644 --- a/Documentation/config/branch.txt +++ b/Documentation/config/branch.txt @@ -7,7 +7,8 @@ branch.autoSetupMerge:: automatic setup is done; `true` -- automatic setup is done when the starting point is a remote-tracking branch; `always` -- automatic setup is done when the starting point is either a - local branch or remote-tracking + local branch or remote-tracking branch; `inherit` -- if the starting point + has a tracking configuration, it is copied to the new branch. This option defaults to true. branch.autoSetupRebase:: diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt index 5449767..75beea7 100644 --- a/Documentation/git-branch.txt +++ b/Documentation/git-branch.txt @@ -16,7 +16,7 @@ SYNOPSIS [--points-at ] [--format=] [(-r | --remotes) | (-a | --all)] [--list] [...] -'git branch' [--track | --no-track] [-f] [] +'git branch' [--track [direct|inherit] | --no-track] [-f] [] 'git branch' (--set-upstream-to= | -u ) [] 'git branch' --unset-upstream [] 'git branch' (-m | -M) [] @@ -206,24 +206,34 @@ This option is only applicable in non-verbose mode. Display the full sha1s in the output listing rather than abbreviating them. -t:: ---track:: +--track [inherit|direct]:: When creating a new branch, set up `branch..remote` and - `branch..merge` configuration entries to mark the - start-point branch as "upstream" from the new branch. This + `branch..merge` configuration entries to set "upstream" tracking + configuration for the new branch. This configuration will tell git to show the relationship between the two branches in `git status` and `git branch -v`. Furthermore, it directs `git pull` without arguments to pull from the upstream when the new branch is checked out. + -This behavior is the default when the start point is a remote-tracking branch. +The exact upstream branch is chosen depending on the optional argument: +`--track` or `--track direct` means to use the start-point branch itself as the +upstream; `--track inherit` means to copy the upstream configuration of the +start-point branch. ++ +`--track direct` is the default when the start point is a remote-tracking branch. Set the branch.autoSetupMerge configuration variable to `false` if you want `git switch`, `git checkout` and `git branch` to always behave as if `--no-track` were given. Set it to `always` if you want this behavior when the -start-point is either a local or remote-tracking branch. +start-point is either a local or remote-tracking branch. Set it to +`inherit` if you want to copy the tracking configuration from the +branch point. ++ +See linkgit:git-pull[1] and linkgit:git-config[1] for additional discussion on +how the `branch..remote` and `branch..merge` options are used. --no-track:: Do not set up "upstream" configuration, even if the - branch.autoSetupMerge configuration variable is true. + branch.autoSetupMerge configuration variable is set. --set-upstream:: As this option had confusing syntax, it is no longer supported. diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt index d473c9b..61825b0 100644 --- a/Documentation/git-checkout.txt +++ b/Documentation/git-checkout.txt @@ -156,7 +156,7 @@ of it"). linkgit:git-branch[1] for details. -t:: ---track:: +--track [direct|inherit]:: When creating a new branch, set up "upstream" configuration. See "--track" in linkgit:git-branch[1] for details. + diff --git a/Documentation/git-switch.txt b/Documentation/git-switch.txt index 5c438cd..96dc036 100644 --- a/Documentation/git-switch.txt +++ b/Documentation/git-switch.txt @@ -152,7 +152,7 @@ should result in deletion of the path). attached to a terminal, regardless of `--quiet`. -t:: ---track:: +--track [direct|inherit]:: When creating a new branch, set up "upstream" configuration. `-c` is implied. See `--track` in linkgit:git-branch[1] for details. diff --git a/branch.c b/branch.c index 299c8f0..a4e4631 100644 --- a/branch.c +++ b/branch.c @@ -11,7 +11,7 @@ struct tracking { struct refspec_item spec; - char *src; + struct string_list *srcs; const char *remote; int matches; }; @@ -22,11 +22,11 @@ static int find_tracked_branch(struct remote *remote, void *priv) if (!remote_find_tracking(remote, &tracking->spec)) { if (++tracking->matches == 1) { - tracking->src = tracking->spec.src; + string_list_append(tracking->srcs, tracking->spec.src); tracking->remote = remote->name; } else { free(tracking->spec.src); - FREE_AND_NULL(tracking->src); + string_list_clear(tracking->srcs, 0); } tracking->spec.src = NULL; } @@ -189,6 +189,34 @@ int install_branch_config(int flag, const char *local, const char *origin, return ret; } +static int inherit_tracking(struct tracking *tracking, const char *orig_ref) +{ + const char *bare_ref; + struct branch *branch; + int i; + + bare_ref = orig_ref; + skip_prefix(orig_ref, "refs/heads/", &bare_ref); + + branch = branch_get(bare_ref); + if (!branch->remote_name) { + warning(_("asked to inherit tracking from '%s', but no remote is set"), + bare_ref); + return -1; + } + + if (branch->merge_nr < 1 || !branch->merge_name || !branch->merge_name[0]) { + warning(_("asked to inherit tracking from '%s', but no merge configuration is set"), + bare_ref); + return -1; + } + + tracking->remote = xstrdup(branch->remote_name); + for (i = 0; i < branch->merge_nr; i++) + string_list_append(tracking->srcs, branch->merge_name[i]); + return 0; +} + /* * This is called when new_ref is branched off of orig_ref, and tries * to infer the settings for branch..{remote,merge} from the @@ -198,11 +226,15 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, enum branch_track track, int quiet) { struct tracking tracking; + struct string_list tracking_srcs = STRING_LIST_INIT_DUP; int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE; memset(&tracking, 0, sizeof(tracking)); tracking.spec.dst = (char *)orig_ref; - if (for_each_remote(find_tracked_branch, &tracking)) + tracking.srcs = &tracking_srcs; + if (track != BRANCH_TRACK_INHERIT) + for_each_remote(find_tracked_branch, &tracking); + else if (inherit_tracking(&tracking, orig_ref)) return; if (!tracking.matches) @@ -210,6 +242,7 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, case BRANCH_TRACK_ALWAYS: case BRANCH_TRACK_EXPLICIT: case BRANCH_TRACK_OVERRIDE: + case BRANCH_TRACK_INHERIT: break; default: return; @@ -219,11 +252,13 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, die(_("Not tracking: ambiguous information for ref %s"), orig_ref); - if (install_branch_config(config_flags, new_ref, tracking.remote, - tracking.src ? tracking.src : orig_ref) < 0) + if (tracking.srcs->nr < 1) + string_list_append(tracking.srcs, orig_ref); + if (install_branch_config_multiple_remotes(config_flags, new_ref, + tracking.remote, tracking.srcs) < 0) exit(-1); - free(tracking.src); + string_list_clear(tracking.srcs, 0); } int read_branch_desc(struct strbuf *buf, const char *branch_name) diff --git a/branch.h b/branch.h index df0be61..815dcd4 100644 --- a/branch.h +++ b/branch.h @@ -10,7 +10,8 @@ enum branch_track { BRANCH_TRACK_REMOTE, BRANCH_TRACK_ALWAYS, BRANCH_TRACK_EXPLICIT, - BRANCH_TRACK_OVERRIDE + BRANCH_TRACK_OVERRIDE, + BRANCH_TRACK_INHERIT, }; extern enum branch_track git_branch_track; diff --git a/builtin/branch.c b/builtin/branch.c index 0b7ed82..1890afd 100644 --- a/builtin/branch.c +++ b/builtin/branch.c @@ -632,8 +632,10 @@ int cmd_branch(int argc, const char **argv, const char *prefix) OPT__VERBOSE(&filter.verbose, N_("show hash and subject, give twice for upstream branch")), OPT__QUIET(&quiet, N_("suppress informational messages")), - OPT_SET_INT('t', "track", &track, N_("set up tracking mode (see git-pull(1))"), - BRANCH_TRACK_EXPLICIT), + OPT_CALLBACK_F('t', "track", &track, "direct|inherit", + N_("set branch tracking configuration"), + PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP, + parse_opt_tracking_mode), OPT_SET_INT_F(0, "set-upstream", &track, N_("do not use"), BRANCH_TRACK_OVERRIDE, PARSE_OPT_HIDDEN), OPT_STRING('u', "set-upstream-to", &new_upstream, N_("upstream"), N_("change the upstream info")), diff --git a/builtin/checkout.c b/builtin/checkout.c index cbf73b8..8d511aa 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -1530,8 +1530,10 @@ 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_SET_INT('t', "track", &opts->track, N_("set upstream info for new branch"), - BRANCH_TRACK_EXPLICIT), + OPT_CALLBACK_F('t', "track", &opts->track, "direct|inherit", + N_("set up tracking mode (see git-pull(1))"), + PARSE_OPT_OPTARG | PARSE_OPT_LITERAL_ARGHELP, + parse_opt_tracking_mode), 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 unparented branch")), diff --git a/config.c b/config.c index 2dcbe90..532732f 100644 --- a/config.c +++ b/config.c @@ -1559,6 +1559,9 @@ static int git_default_branch_config(const char *var, const char *value) if (value && !strcasecmp(value, "always")) { git_branch_track = BRANCH_TRACK_ALWAYS; return 0; + } else if (value && !strcmp(value, "inherit")) { + git_branch_track = BRANCH_TRACK_INHERIT; + return 0; } git_branch_track = git_config_bool(var, value); return 0; diff --git a/parse-options-cb.c b/parse-options-cb.c index 3c811e1..d346dbe 100644 --- a/parse-options-cb.c +++ b/parse-options-cb.c @@ -1,5 +1,6 @@ #include "git-compat-util.h" #include "parse-options.h" +#include "branch.h" #include "cache.h" #include "commit.h" #include "color.h" @@ -293,3 +294,18 @@ int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset return 0; } + +int parse_opt_tracking_mode(const struct option *opt, const char *arg, int unset) +{ + if (unset) + *(enum branch_track *)opt->value = BRANCH_TRACK_NEVER; + else if (!arg || !strcmp(arg, "direct")) + *(enum branch_track *)opt->value = BRANCH_TRACK_EXPLICIT; + else if (!strcmp(arg, "inherit")) + *(enum branch_track *)opt->value = BRANCH_TRACK_INHERIT; + else + return error(_("option `%s' expects \"%s\" or \"%s\""), + "--track", "direct", "inherit"); + + return 0; +} diff --git a/parse-options.h b/parse-options.h index 1340547..47ba8dc 100644 --- a/parse-options.h +++ b/parse-options.h @@ -302,6 +302,8 @@ enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx, const char *, int); int parse_opt_passthru(const struct option *, const char *, int); int parse_opt_passthru_argv(const struct option *, const char *, int); +/* value is enum branch_track* */ +int parse_opt_tracking_mode(const struct option *, const char *, int); #define OPT__VERBOSE(var, h) OPT_COUNTUP('v', "verbose", (var), (h)) #define OPT__QUIET(var, h) OPT_COUNTUP('q', "quiet", (var), (h)) diff --git a/t/t2017-checkout-orphan.sh b/t/t2017-checkout-orphan.sh index 88d6992..4d689bd 100755 --- a/t/t2017-checkout-orphan.sh +++ b/t/t2017-checkout-orphan.sh @@ -62,8 +62,17 @@ test_expect_success '--orphan ignores branch.autosetupmerge' ' git checkout main && git config branch.autosetupmerge always && git checkout --orphan gamma && - test -z "$(git config branch.gamma.merge)" && + test_cmp_config "" --default "" branch.gamma.merge && test refs/heads/gamma = "$(git symbolic-ref HEAD)" && + test_must_fail git rev-parse --verify HEAD^ && + git checkout main && + git config branch.autosetupmerge inherit && + git checkout --orphan eta && + test_cmp_config "" --default "" branch.eta.merge && + test_cmp_config "" --default "" branch.eta.remote && + echo refs/heads/eta >expected && + git symbolic-ref HEAD >actual && + test_cmp expected actual && test_must_fail git rev-parse --verify HEAD^ ' diff --git a/t/t2027-checkout-track.sh b/t/t2027-checkout-track.sh index 4453741..dca35aa 100755 --- a/t/t2027-checkout-track.sh +++ b/t/t2027-checkout-track.sh @@ -24,4 +24,27 @@ test_expect_success 'checkout --track -b rejects an extra path argument' ' test_i18ngrep "cannot be used with updating paths" err ' +test_expect_success 'checkout --track -b overrides autoSetupMerge=inherit' ' + # Set up tracking config on main + test_config branch.main.remote origin && + test_config branch.main.merge refs/heads/some-branch && + test_config branch.autoSetupMerge inherit && + # With --track=inherit, we copy the tracking config from main + git checkout --track=inherit -b b1 main && + test_cmp_config origin branch.b1.remote && + test_cmp_config refs/heads/some-branch branch.b1.merge && + # With branch.autoSetupMerge=inherit, we do the same + git checkout -b b2 main && + test_cmp_config origin branch.b2.remote && + test_cmp_config refs/heads/some-branch branch.b2.merge && + # But --track overrides this + git checkout --track -b b3 main && + test_cmp_config . branch.b3.remote && + test_cmp_config refs/heads/main branch.b3.merge && + # And --track=direct does as well + git checkout --track=direct -b b4 main && + test_cmp_config . branch.b4.remote && + test_cmp_config refs/heads/main branch.b4.merge +' + test_done diff --git a/t/t2060-switch.sh b/t/t2060-switch.sh index 9bc6a3a..ebb961b 100755 --- a/t/t2060-switch.sh +++ b/t/t2060-switch.sh @@ -107,4 +107,32 @@ test_expect_success 'not switching when something is in progress' ' test_must_fail git switch -d @^ ' +test_expect_success 'tracking info copied with autoSetupMerge=inherit' ' + # default config does not copy tracking info + git switch -c foo-no-inherit foo && + test_cmp_config "" --default "" branch.foo-no-inherit.remote && + test_cmp_config "" --default "" branch.foo-no-inherit.merge && + # with --track=inherit, we copy tracking info from foo + git switch --track=inherit -c foo2 foo && + test_cmp_config origin branch.foo2.remote && + test_cmp_config refs/heads/foo branch.foo2.merge && + # with autoSetupMerge=inherit, we do the same + test_config branch.autoSetupMerge inherit && + git switch -c foo3 foo && + test_cmp_config origin branch.foo3.remote && + test_cmp_config refs/heads/foo branch.foo3.merge && + # with --track, we override autoSetupMerge + git switch --track -c foo4 foo && + test_cmp_config . branch.foo4.remote && + test_cmp_config refs/heads/foo branch.foo4.merge && + # and --track=direct does as well + git switch --track=direct -c foo5 foo && + test_cmp_config . branch.foo5.remote && + test_cmp_config refs/heads/foo branch.foo5.merge && + # no tracking info to inherit from main + git switch -c main2 main && + test_cmp_config "" --default "" branch.main2.remote && + test_cmp_config "" --default "" branch.main2.merge +' + test_done diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh index bcc1aca..a74b2e0 100755 --- a/t/t3200-branch.sh +++ b/t/t3200-branch.sh @@ -1422,4 +1422,37 @@ test_expect_success 'invalid sort parameter in configuration' ' ) ' +test_expect_success 'tracking info copied with --track=inherit' ' + git branch --track=inherit foo2 my1 && + test_cmp_config local branch.foo2.remote && + test_cmp_config refs/heads/main branch.foo2.merge +' + +test_expect_success 'tracking info copied with autoSetupMerge=inherit' ' + test_unconfig branch.autoSetupMerge && + # default config does not copy tracking info + git branch foo-no-inherit my1 && + test_cmp_config "" --default "" branch.foo-no-inherit.remote && + test_cmp_config "" --default "" branch.foo-no-inherit.merge && + # with autoSetupMerge=inherit, we copy tracking info from my1 + test_config branch.autoSetupMerge inherit && + git branch foo3 my1 && + test_cmp_config local branch.foo3.remote && + test_cmp_config refs/heads/main branch.foo3.merge && + # no tracking info to inherit from main + git branch main2 main && + test_cmp_config "" --default "" branch.main2.remote && + test_cmp_config "" --default "" branch.main2.merge +' + +test_expect_success '--track overrides branch.autoSetupMerge' ' + test_config branch.autoSetupMerge inherit && + git branch --track=direct foo4 my1 && + test_cmp_config . branch.foo4.remote && + test_cmp_config refs/heads/my1 branch.foo4.merge && + git branch --no-track foo5 my1 && + test_cmp_config "" --default "" branch.foo5.remote && + test_cmp_config "" --default "" branch.foo5.merge +' + test_done diff --git a/t/t7201-co.sh b/t/t7201-co.sh index b7ba1c3..61ad47b 100755 --- a/t/t7201-co.sh +++ b/t/t7201-co.sh @@ -658,4 +658,21 @@ test_expect_success 'custom merge driver with checkout -m' ' test_cmp expect arm ' +test_expect_success 'tracking info copied with autoSetupMerge=inherit' ' + git reset --hard main && + # default config does not copy tracking info + git checkout -b foo-no-inherit koala/bear && + test_cmp_config "" --default "" branch.foo-no-inherit.remote && + test_cmp_config "" --default "" branch.foo-no-inherit.merge && + # with autoSetupMerge=inherit, we copy tracking info from koala/bear + test_config branch.autoSetupMerge inherit && + git checkout -b foo koala/bear && + test_cmp_config origin branch.foo.remote && + test_cmp_config refs/heads/koala/bear branch.foo.merge && + # no tracking info to inherit from main + git checkout -b main2 main && + test_cmp_config "" --default "" branch.main2.remote && + test_cmp_config "" --default "" branch.main2.merge +' + test_done -- cgit v0.10.2-6-g49f6