diff options
| -rw-r--r-- | Documentation/config/advice.txt | 4 | ||||
| -rw-r--r-- | advice.c | 1 | ||||
| -rw-r--r-- | advice.h | 1 | ||||
| -rw-r--r-- | branch.c | 63 | ||||
| -rwxr-xr-x | t/t3200-branch.sh | 18 |
5 files changed, 78 insertions, 9 deletions
diff --git a/Documentation/config/advice.txt b/Documentation/config/advice.txt index 83c2a95661..a00d0100a8 100644 --- a/Documentation/config/advice.txt +++ b/Documentation/config/advice.txt @@ -4,6 +4,10 @@ advice.*:: can tell Git that you do not need help by setting these to 'false': + -- + ambiguousFetchRefspec:: + Advice shown when fetch refspec for multiple remotes map to + the same remote-tracking branch namespace and causes branch + tracking set-up to fail. fetchShowForcedUpdates:: Advice shown when linkgit:git-fetch[1] takes a long time to calculate forced updates after ref updates, or to warn @@ -39,6 +39,7 @@ static struct { [ADVICE_ADD_EMPTY_PATHSPEC] = { "addEmptyPathspec", 1 }, [ADVICE_ADD_IGNORED_FILE] = { "addIgnoredFile", 1 }, [ADVICE_AM_WORK_DIR] = { "amWorkDir", 1 }, + [ADVICE_AMBIGUOUS_FETCH_REFSPEC] = { "ambiguousFetchRefspec", 1 }, [ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME] = { "checkoutAmbiguousRemoteBranchName", 1 }, [ADVICE_COMMIT_BEFORE_MERGE] = { "commitBeforeMerge", 1 }, [ADVICE_DETACHED_HEAD] = { "detachedHead", 1 }, @@ -17,6 +17,7 @@ struct string_list; ADVICE_ADD_EMPTY_PATHSPEC, ADVICE_ADD_IGNORED_FILE, ADVICE_AM_WORK_DIR, + ADVICE_AMBIGUOUS_FETCH_REFSPEC, ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME, ADVICE_COMMIT_BEFORE_MERGE, ADVICE_DETACHED_HEAD, @@ -18,17 +18,31 @@ struct tracking { int matches; }; +struct find_tracked_branch_cb { + struct tracking *tracking; + struct string_list ambiguous_remotes; +}; + static int find_tracked_branch(struct remote *remote, void *priv) { - struct tracking *tracking = priv; + struct find_tracked_branch_cb *ftb = priv; + struct tracking *tracking = ftb->tracking; if (!remote_find_tracking(remote, &tracking->spec)) { - if (++tracking->matches == 1) { + switch (++tracking->matches) { + case 1: string_list_append(tracking->srcs, tracking->spec.src); tracking->remote = remote->name; - } else { + break; + case 2: + /* there are at least two remotes; backfill the first one */ + string_list_append(&ftb->ambiguous_remotes, tracking->remote); + /* fall through */ + default: + string_list_append(&ftb->ambiguous_remotes, remote->name); free(tracking->spec.src); string_list_clear(tracking->srcs, 0); + break; } tracking->spec.src = NULL; } @@ -232,6 +246,10 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, struct tracking tracking; struct string_list tracking_srcs = STRING_LIST_INIT_DUP; int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE; + struct find_tracked_branch_cb ftb_cb = { + .tracking = &tracking, + .ambiguous_remotes = STRING_LIST_INIT_DUP, + }; if (!track) BUG("asked to set up tracking, but tracking is disallowed"); @@ -240,7 +258,7 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, tracking.spec.dst = (char *)orig_ref; tracking.srcs = &tracking_srcs; if (track != BRANCH_TRACK_INHERIT) - for_each_remote(find_tracked_branch, &tracking); + for_each_remote(find_tracked_branch, &ftb_cb); else if (inherit_tracking(&tracking, orig_ref)) goto cleanup; @@ -255,9 +273,39 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, goto cleanup; } - if (tracking.matches > 1) - die(_("not tracking: ambiguous information for ref %s"), - orig_ref); + if (tracking.matches > 1) { + int status = die_message(_("not tracking: ambiguous information for ref '%s'"), + orig_ref); + if (advice_enabled(ADVICE_AMBIGUOUS_FETCH_REFSPEC)) { + struct strbuf remotes_advice = STRBUF_INIT; + struct string_list_item *item; + + for_each_string_list_item(item, &ftb_cb.ambiguous_remotes) + /* + * TRANSLATORS: This is a line listing a remote with duplicate + * refspecs in the advice message below. For RTL languages you'll + * probably want to swap the "%s" and leading " " space around. + */ + strbuf_addf(&remotes_advice, _(" %s\n"), item->string); + + /* + * TRANSLATORS: The second argument is a \n-delimited list of + * duplicate refspecs, composed above. + */ + advise(_("There are multiple remotes whose fetch refspecs map to the remote\n" + "tracking ref '%s':\n" + "%s" + "\n" + "This is typically a configuration error.\n" + "\n" + "To support setting up tracking branches, ensure that\n" + "different remotes' fetch refspecs map into different\n" + "tracking namespaces."), orig_ref, + remotes_advice.buf); + strbuf_release(&remotes_advice); + } + exit(status); + } if (tracking.srcs->nr < 1) string_list_append(tracking.srcs, orig_ref); @@ -267,6 +315,7 @@ static void setup_tracking(const char *new_ref, const char *orig_ref, cleanup: string_list_clear(&tracking_srcs, 0); + string_list_clear(&ftb_cb.ambiguous_remotes, 0); } int read_branch_desc(struct strbuf *buf, const char *branch_name) diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh index 7a0ff75ba8..e12db59361 100755 --- a/t/t3200-branch.sh +++ b/t/t3200-branch.sh @@ -1039,13 +1039,27 @@ test_expect_success 'checkout -b with -l makes reflog when core.logAllRefUpdates git rev-parse --verify gamma@{0} ' -test_expect_success 'avoid ambiguous track' ' +test_expect_success 'avoid ambiguous track and advise' ' git config branch.autosetupmerge true && git config remote.ambi1.url lalala && git config remote.ambi1.fetch refs/heads/lalala:refs/heads/main && git config remote.ambi2.url lilili && git config remote.ambi2.fetch refs/heads/lilili:refs/heads/main && - test_must_fail git branch all1 main && + cat <<-EOF >expected && + fatal: not tracking: ambiguous information for ref '\''refs/heads/main'\'' + hint: There are multiple remotes whose fetch refspecs map to the remote + hint: tracking ref '\''refs/heads/main'\'': + hint: ambi1 + hint: ambi2 + hint: '' + hint: This is typically a configuration error. + hint: '' + hint: To support setting up tracking branches, ensure that + hint: different remotes'\'' fetch refspecs map into different + hint: tracking namespaces. + EOF + test_must_fail git branch all1 main 2>actual && + test_cmp expected actual && test -z "$(git config branch.all1.merge)" ' |