From: Junio C Hamano Date: Tue, 27 Jan 2026 19:29:36 GMT Subject: [PATCH 2/2] checkout: tell "parse_remote_branch" which command is calling it Message-ID: <20260127192936.904719-3-gitster@pobox.com> In-Reply-To: <20260127192936.904719-1-gitster@pobox.com> When "git checkout " and "git switch " need to error out due to ambiguity of the branch name , these command give an advise message that tells a sample command to show how to disambiguate from the parse_remote_branch() function. The sample command hardcodes "git checkout", since this feature predates "git switch" by a large margin. To a user who said "git switch " and got this message, it is confusing. Pass the "enum checkout_command", which was invented in the previous step for this exact purpose, down the call chain leading to parse_remote_branch() function to change the sample command shown to the user in this advise message. Reported-by: Simon Cheng Signed-off-by: Junio C Hamano --- builtin/checkout.c | 29 ++++++++++++++++++++++++----- t/t2027-checkout-track.sh | 21 +++++++++++++++++++++ 2 files changed, 45 insertions(+), 5 deletions(-) diff --git a/builtin/checkout.c b/builtin/checkout.c index 4f189fde48..17f31c30b2 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -1286,7 +1286,8 @@ enum checkout_command { static char *parse_remote_branch(const char *arg, struct object_id *rev, - int could_be_checkout_paths) + int could_be_checkout_paths, + enum checkout_command which_command) { int num_matches = 0; char *remote = unique_tracking_name(arg, rev, &num_matches); @@ -1299,14 +1300,30 @@ static char *parse_remote_branch(const char *arg, if (!remote && num_matches > 1) { if (advice_enabled(ADVICE_CHECKOUT_AMBIGUOUS_REMOTE_BRANCH_NAME)) { + const char *cmdname; + + switch (which_command) { + case CHECKOUT_CHECKOUT: + cmdname = "checkout"; + break; + case CHECKOUT_SWITCH: + cmdname = "switch"; + break; + default: + BUG("command <%d> should not reach parse_remote_branch", + which_command); + break; + } + advise(_("If you meant to check out a remote tracking branch on, e.g. 'origin',\n" "you can do so by fully qualifying the name with the --track option:\n" "\n" - " git checkout --track origin/\n" + " git %s --track origin/\n" "\n" "If you'd like to always have checkouts of an ambiguous prefer\n" "one remote, e.g. the 'origin' remote, consider setting\n" - "checkout.defaultRemote=origin in your config.")); + "checkout.defaultRemote=origin in your config."), + cmdname); } die(_("'%s' matched multiple (%d) remote tracking branches"), @@ -1318,6 +1335,7 @@ static char *parse_remote_branch(const char *arg, static int parse_branchname_arg(int argc, const char **argv, int dwim_new_local_branch_ok, + enum checkout_command which_command, struct branch_info *new_branch_info, struct checkout_opts *opts, struct object_id *rev) @@ -1427,7 +1445,8 @@ static int parse_branchname_arg(int argc, const char **argv, if (recover_with_dwim) { remote = parse_remote_branch(arg, rev, - could_be_checkout_paths); + could_be_checkout_paths, + which_command); if (remote) { *new_branch = arg; arg = remote; @@ -1916,7 +1935,7 @@ 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, + int n = parse_branchname_arg(argc, argv, dwim_ok, which_command, &new_branch_info, opts, &rev); argv += n; argc -= n; diff --git a/t/t2027-checkout-track.sh b/t/t2027-checkout-track.sh index a397790df5..e9f8d8ec48 100755 --- a/t/t2027-checkout-track.sh +++ b/t/t2027-checkout-track.sh @@ -47,4 +47,25 @@ test_expect_success 'checkout --track -b overrides autoSetupMerge=inherit' ' test_cmp_config refs/heads/main branch.b4.merge ' +test_expect_success 'ambiguous tracking info' ' + # Set up a few remote repositories + git init --bare --initial-branch=trunk src1 && + git init --bare --initial-branch=trunk src2 && + git push src1 one:refs/heads/trunk && + git push src2 two:refs/heads/trunk && + + git remote add -f src1 "file://$PWD/src1" && + git remote add -f src2 "file://$PWD/src2" && + + # DWIM + test_must_fail git checkout trunk 2>hint && + test_grep "hint: *git checkout --track" hint && + test_grep ! "hint: *git switch --track" hint && + + { git update-ref -d refs/heads/trunk || :; } && + test_must_fail git switch trunk 2>hint && + test_grep ! "hint: *git checkout --track" hint && + test_grep "hint: *git switch --track" hint +' + test_done -- 2.53.0-rc2-135-gb1217c0133