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branch: description for non-existent branch errors

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When the repository does not yet have commits, some errors describe that
there is no branch:

    $ git init -b first

    $ git branch --edit-description first
    error: No branch named 'first'.

    $ git branch --set-upstream-to=upstream
    fatal: branch 'first' does not exist

    $ git branch -c second
    error: refname refs/heads/first not found
    fatal: Branch copy failed

That "first" branch is unborn but to say it doesn't exists is confusing.

Options "-c" (copy) and "-m" (rename) show the same error when the
origin branch doesn't exists:

    $ git branch -c non-existent-branch second
    error: refname refs/heads/non-existent-branch not found
    fatal: Branch copy failed

    $ git branch -m non-existent-branch second
    error: refname refs/heads/non-existent-branch not found
    fatal: Branch rename failed

Note that "--edit-description" without an explicit argument is already
considering the _empty repository_ circumstance in its error.  Also note
that "-m" on the initial branch it is an allowed operation.

Make the error descriptions for those branch operations with unborn or
non-existent branches, more informative.

This is the result of the change:

    $ git init -b first

    $ git branch --edit-description first
    error: No commit on branch 'first' yet.

    $ git branch --set-upstream-to=upstream
    fatal: No commit on branch 'first' yet.

    $ git branch -c second
    fatal: No commit on branch 'first' yet.

    $ git branch [-c/-m] non-existent-branch second
    fatal: No branch named 'non-existent-branch'.

Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Rubén Justo 2022-10-08 02:39:43 +02:00 committed by Junio C Hamano
parent bcd6bc478a
commit bcfc82bd48
2 changed files with 58 additions and 2 deletions
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14
builtin/branch.c
View file

@ -538,6 +538,13 @@ static void copy_or_rename_branch(const char *oldname, const char *newname, int
die(_("Invalid branch name: '%s'"), oldname);
}
if ((copy || strcmp(head, oldname)) && !ref_exists(oldref.buf)) {
if (copy && !strcmp(head, oldname))
die(_("No commit on branch '%s' yet."), oldname);
else
die(_("No branch named '%s'."), oldname);
}
/*
* A command like "git branch -M currentbranch currentbranch" cannot
* cause the worktree to become inconsistent with HEAD, so allow it.
@ -805,7 +812,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
if (!ref_exists(branch_ref.buf)) {
strbuf_release(&branch_ref);
if (!argc)
if (!argc || !strcmp(head, branch_name))
return error(_("No commit on branch '%s' yet."),
branch_name);
else
@ -848,8 +855,11 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
die(_("no such branch '%s'"), argv[0]);
}
if (!ref_exists(branch->refname))
if (!ref_exists(branch->refname)) {
if (!argc || !strcmp(head, branch->name))
die(_("No commit on branch '%s' yet."), branch->name);
die(_("branch '%s' does not exist"), branch->name);
}
dwim_and_setup_tracking(the_repository, branch->name,
new_upstream, BRANCH_TRACK_OVERRIDE,

46
t/t3202-show-branch.sh
View file

@ -7,6 +7,28 @@ test_description='test show-branch'
# arbitrary reference time: 2009-08-30 19:20:00
GIT_TEST_DATE_NOW=1251660000; export GIT_TEST_DATE_NOW
test_expect_success 'error descriptions on empty repository' '
current=$(git branch --show-current) &&
cat >expect <<-EOF &&
error: No commit on branch '\''$current'\'' yet.
EOF
test_must_fail git branch --edit-description 2>actual &&
test_cmp expect actual &&
test_must_fail git branch --edit-description $current 2>actual &&
test_cmp expect actual
'
test_expect_success 'fatal descriptions on empty repository' '
current=$(git branch --show-current) &&
cat >expect <<-EOF &&
fatal: No commit on branch '\''$current'\'' yet.
EOF
test_must_fail git branch --set-upstream-to=non-existent 2>actual &&
test_cmp expect actual &&
test_must_fail git branch -c new-branch 2>actual &&
test_cmp expect actual
'
test_expect_success 'setup' '
test_commit initial &&
for i in $(test_seq 1 10)
@ -175,4 +197,28 @@ done <<\EOF
--reflog --current
EOF
test_expect_success 'error descriptions on non-existent branch' '
cat >expect <<-EOF &&
error: No branch named '\''non-existent'\'.'
EOF
test_must_fail git branch --edit-description non-existent 2>actual &&
test_cmp expect actual
'
test_expect_success 'fatal descriptions on non-existent branch' '
cat >expect <<-EOF &&
fatal: branch '\''non-existent'\'' does not exist
EOF
test_must_fail git branch --set-upstream-to=non-existent non-existent 2>actual &&
test_cmp expect actual &&
cat >expect <<-EOF &&
fatal: No branch named '\''non-existent'\''.
EOF
test_must_fail git branch -c non-existent new-branch 2>actual &&
test_cmp expect actual &&
test_must_fail git branch -m non-existent new-branch 2>actual &&
test_cmp expect actual
'
test_done