branch: error copying or renaming a detached HEAD

[alt-git.git] / t / t3200-branch.sh

#!/bin/sh
#
# Copyright (c) 2005 Amos Waterland
#

test_description='git branch assorted tests'

GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh

test_expect_success 'prepare a trivial repository' '
        echo Hello >A &&
        git update-index --add A &&
        git commit -m "Initial commit." &&
        git branch -M main &&
        echo World >>A &&
        git update-index --add A &&
        git commit -m "Second commit." &&
        HEAD=$(git rev-parse --verify HEAD)
'

test_expect_success 'git branch --help should not have created a bogus branch' '
        test_might_fail git branch --man --help </dev/null >/dev/null 2>&1 &&
        test_path_is_missing .git/refs/heads/--help
'

test_expect_success 'branch -h in broken repository' '
        mkdir broken &&
        (
                cd broken &&
                git init -b main &&
                >.git/refs/heads/main &&
                test_expect_code 129 git branch -h >usage 2>&1
        ) &&
        test_i18ngrep "[Uu]sage" broken/usage
'

test_expect_success 'git branch abc should create a branch' '
        git branch abc && test_path_is_file .git/refs/heads/abc
'

test_expect_success 'git branch abc should fail when abc exists' '
        test_must_fail git branch abc
'

test_expect_success 'git branch --force abc should fail when abc is checked out' '
        test_when_finished git switch main &&
        git switch abc &&
        test_must_fail git branch --force abc HEAD~1
'

test_expect_success 'git branch --force abc should succeed when abc exists' '
        git rev-parse HEAD~1 >expect &&
        git branch --force abc HEAD~1 &&
        git rev-parse abc >actual &&
        test_cmp expect actual
'

test_expect_success 'git branch a/b/c should create a branch' '
        git branch a/b/c && test_path_is_file .git/refs/heads/a/b/c
'

test_expect_success 'git branch mb main... should create a branch' '
        git branch mb main... && test_path_is_file .git/refs/heads/mb
'

test_expect_success 'git branch HEAD should fail' '
        test_must_fail git branch HEAD
'

cat >expect <<EOF
$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000     branch: Created from main
EOF
test_expect_success 'git branch --create-reflog d/e/f should create a branch and a log' '
        GIT_COMMITTER_DATE="2005-05-26 23:30" \
        git -c core.logallrefupdates=false branch --create-reflog d/e/f &&
        test_path_is_file .git/refs/heads/d/e/f &&
        test_path_is_file .git/logs/refs/heads/d/e/f &&
        test_cmp expect .git/logs/refs/heads/d/e/f
'

test_expect_success 'git branch -d d/e/f should delete a branch and a log' '
        git branch -d d/e/f &&
        test_path_is_missing .git/refs/heads/d/e/f &&
        test_must_fail git reflog exists refs/heads/d/e/f
'

test_expect_success 'git branch j/k should work after branch j has been deleted' '
        git branch j &&
        git branch -d j &&
        git branch j/k
'

test_expect_success 'git branch l should work after branch l/m has been deleted' '
        git branch l/m &&
        git branch -d l/m &&
        git branch l
'

test_expect_success 'git branch -m dumps usage' '
        test_expect_code 128 git branch -m 2>err &&
        test_i18ngrep "branch name required" err
'

test_expect_success 'git branch -m m broken_symref should work' '
        test_when_finished "git branch -D broken_symref" &&
        git branch --create-reflog m &&
        git symbolic-ref refs/heads/broken_symref refs/heads/i_am_broken &&
        git branch -m m broken_symref &&
        git reflog exists refs/heads/broken_symref &&
        test_must_fail git reflog exists refs/heads/i_am_broken
'

test_expect_success 'git branch -m m m/m should work' '
        git branch --create-reflog m &&
        git branch -m m m/m &&
        git reflog exists refs/heads/m/m
'

test_expect_success 'git branch -m n/n n should work' '
        git branch --create-reflog n/n &&
        git branch -m n/n n &&
        git reflog exists refs/heads/n
'

# The topmost entry in reflog for branch bbb is about branch creation.
# Hence, we compare bbb@{1} (instead of bbb@{0}) with aaa@{0}.

test_expect_success 'git branch -m bbb should rename checked out branch' '
        test_when_finished git branch -D bbb &&
        test_when_finished git checkout main &&
        git checkout -b aaa &&
        git commit --allow-empty -m "a new commit" &&
        git rev-parse aaa@{0} >expect &&
        git branch -m bbb &&
        git rev-parse bbb@{1} >actual &&
        test_cmp expect actual &&
        git symbolic-ref HEAD >actual &&
        echo refs/heads/bbb >expect &&
        test_cmp expect actual
'

test_expect_success 'renaming checked out branch works with d/f conflict' '
        test_when_finished "git branch -D foo/bar || git branch -D foo" &&
        test_when_finished git checkout main &&
        git checkout -b foo &&
        git branch -m foo/bar &&
        git symbolic-ref HEAD >actual &&
        echo refs/heads/foo/bar >expect &&
        test_cmp expect actual
'

test_expect_success 'git branch -m o/o o should fail when o/p exists' '
        git branch o/o &&
        git branch o/p &&
        test_must_fail git branch -m o/o o
'

test_expect_success 'git branch -m o/q o/p should fail when o/p exists' '
        git branch o/q &&
        test_must_fail git branch -m o/q o/p
'

test_expect_success 'git branch -M o/q o/p should work when o/p exists' '
        git branch -M o/q o/p
'

test_expect_success 'git branch -m -f o/q o/p should work when o/p exists' '
        git branch o/q &&
        git branch -m -f o/q o/p
'

test_expect_success 'git branch -m q r/q should fail when r exists' '
        git branch q &&
        git branch r &&
        test_must_fail git branch -m q r/q
'

test_expect_success 'git branch -M foo bar should fail when bar is checked out' '
        git branch bar &&
        git checkout -b foo &&
        test_must_fail git branch -M bar foo
'

test_expect_success 'git branch -M foo bar should fail when bar is checked out in worktree' '
        git branch -f bar &&
        test_when_finished "git worktree remove wt && git branch -D wt" &&
        git worktree add wt &&
        test_must_fail git branch -M bar wt
'

test_expect_success 'git branch -M baz bam should succeed when baz is checked out' '
        git checkout -b baz &&
        git branch bam &&
        git branch -M baz bam &&
        test $(git rev-parse --abbrev-ref HEAD) = bam
'

test_expect_success 'git branch -M baz bam should add entries to .git/logs/HEAD' '
        msg="Branch: renamed refs/heads/baz to refs/heads/bam" &&
        grep " $ZERO_OID.*$msg$" .git/logs/HEAD &&
        grep "^$ZERO_OID.*$msg$" .git/logs/HEAD
'

test_expect_success 'git branch -M should leave orphaned HEAD alone' '
        git init -b main orphan &&
        (
                cd orphan &&
                test_commit initial &&
                git checkout --orphan lonely &&
                grep lonely .git/HEAD &&
                test_path_is_missing .git/refs/head/lonely &&
                git branch -M main mistress &&
                grep lonely .git/HEAD
        )
'

test_expect_success 'resulting reflog can be shown by log -g' '
        oid=$(git rev-parse HEAD) &&
        cat >expect <<-EOF &&
        HEAD@{0} $oid $msg
        HEAD@{2} $oid checkout: moving from foo to baz
        EOF
        git log -g --format="%gd %H %gs" -2 HEAD >actual &&
        test_cmp expect actual
'

test_expect_success 'git branch -M baz bam should succeed when baz is checked out as linked working tree' '
        git checkout main &&
        git worktree add -b baz bazdir &&
        git worktree add -f bazdir2 baz &&
        git branch -M baz bam &&
        test $(git -C bazdir rev-parse --abbrev-ref HEAD) = bam &&
        test $(git -C bazdir2 rev-parse --abbrev-ref HEAD) = bam &&
        rm -r bazdir bazdir2 &&
        git worktree prune
'

test_expect_success 'git branch -M baz bam should succeed within a worktree in which baz is checked out' '
        git checkout -b baz &&
        git worktree add -f bazdir baz &&
        (
                cd bazdir &&
                git branch -M baz bam &&
                test $(git rev-parse --abbrev-ref HEAD) = bam
        ) &&
        test $(git rev-parse --abbrev-ref HEAD) = bam &&
        rm -r bazdir &&
        git worktree prune
'

test_expect_success 'git branch -M main should work when main is checked out' '
        git checkout main &&
        git branch -M main
'

test_expect_success 'git branch -M main main should work when main is checked out' '
        git checkout main &&
        git branch -M main main
'

test_expect_success 'git branch -M topic topic should work when main is checked out' '
        git checkout main &&
        git branch topic &&
        git branch -M topic topic
'

test_expect_success 'git branch -M and -C fail on detached HEAD' '
        git checkout HEAD^{} &&
        test_when_finished git checkout - &&
        echo "fatal: cannot rename the current branch while not on any." >expect &&
        test_must_fail git branch -M must-fail 2>err &&
        test_cmp expect err &&
        echo "fatal: cannot copy the current branch while not on any." >expect &&
        test_must_fail git branch -C must-fail 2>err &&
        test_cmp expect err
'

test_expect_success 'git branch -v -d t should work' '
        git branch t &&
        git rev-parse --verify refs/heads/t &&
        git branch -v -d t &&
        test_must_fail git rev-parse --verify refs/heads/t
'

test_expect_success 'git branch -v -m t s should work' '
        git branch t &&
        git rev-parse --verify refs/heads/t &&
        git branch -v -m t s &&
        test_must_fail git rev-parse --verify refs/heads/t &&
        git rev-parse --verify refs/heads/s &&
        git branch -d s
'

test_expect_success 'git branch -m -d t s should fail' '
        git branch t &&
        git rev-parse refs/heads/t &&
        test_must_fail git branch -m -d t s &&
        git branch -d t &&
        test_must_fail git rev-parse refs/heads/t
'

test_expect_success 'git branch --list -d t should fail' '
        git branch t &&
        git rev-parse refs/heads/t &&
        test_must_fail git branch --list -d t &&
        git branch -d t &&
        test_must_fail git rev-parse refs/heads/t
'

test_expect_success 'deleting checked-out branch from repo that is a submodule' '
        test_when_finished "rm -rf repo1 repo2" &&

        git init repo1 &&
        git init repo1/sub &&
        test_commit -C repo1/sub x &&
        test_config_global protocol.file.allow always &&
        git -C repo1 submodule add ./sub &&
        git -C repo1 commit -m "adding sub" &&

        git clone --recurse-submodules repo1 repo2 &&
        git -C repo2/sub checkout -b work &&
        test_must_fail git -C repo2/sub branch -D work
'

test_expect_success 'bare main worktree has HEAD at branch deleted by secondary worktree' '
        test_when_finished "rm -rf nonbare base secondary" &&

        git init -b main nonbare &&
        test_commit -C nonbare x &&
        git clone --bare nonbare bare &&
        git -C bare worktree add --detach ../secondary main &&
        git -C secondary branch -D main
'

test_expect_success 'git branch --list -v with --abbrev' '
        test_when_finished "git branch -D t" &&
        git branch t &&
        git branch -v --list t >actual.default &&
        git branch -v --list --abbrev t >actual.abbrev &&
        test_cmp actual.default actual.abbrev &&

        git branch -v --list --no-abbrev t >actual.noabbrev &&
        git branch -v --list --abbrev=0 t >actual.0abbrev &&
        git -c core.abbrev=no branch -v --list t >actual.noabbrev-conf &&
        test_cmp actual.noabbrev actual.0abbrev &&
        test_cmp actual.noabbrev actual.noabbrev-conf &&

        git branch -v --list --abbrev=36 t >actual.36abbrev &&
        # how many hexdigits are used?
        read name objdefault rest <actual.abbrev &&
        read name obj36 rest <actual.36abbrev &&
        objfull=$(git rev-parse --verify t) &&

        # are we really getting abbreviations?
        test "$obj36" != "$objdefault" &&
        expr "$obj36" : "$objdefault" >/dev/null &&
        test "$objfull" != "$obj36" &&
        expr "$objfull" : "$obj36" >/dev/null

'

test_expect_success 'git branch --column' '
        COLUMNS=81 git branch --column=column >actual &&
        cat >expect <<\EOF &&
  a/b/c   bam     foo     l     * main    n       o/p     r
  abc     bar     j/k     m/m     mb      o/o     q       topic
EOF
        test_cmp expect actual
'

test_expect_success 'git branch --column with an extremely long branch name' '
        long=this/is/a/part/of/long/branch/name &&
        long=z$long/$long/$long/$long &&
        test_when_finished "git branch -d $long" &&
        git branch $long &&
        COLUMNS=80 git branch --column=column >actual &&
        cat >expect <<EOF &&
  a/b/c
  abc
  bam
  bar
  foo
  j/k
  l
  m/m
* main
  mb
  n
  o/o
  o/p
  q
  r
  topic
  $long
EOF
        test_cmp expect actual
'

test_expect_success 'git branch with column.*' '
        git config column.ui column &&
        git config column.branch "dense" &&
        COLUMNS=80 git branch >actual &&
        git config --unset column.branch &&
        git config --unset column.ui &&
        cat >expect <<\EOF &&
  a/b/c   bam   foo   l   * main   n     o/p   r
  abc     bar   j/k   m/m   mb     o/o   q     topic
EOF
        test_cmp expect actual
'

test_expect_success 'git branch --column -v should fail' '
        test_must_fail git branch --column -v
'

test_expect_success 'git branch -v with column.ui ignored' '
        git config column.ui column &&
        COLUMNS=80 git branch -v | cut -c -8 | sed "s/ *$//" >actual &&
        git config --unset column.ui &&
        cat >expect <<\EOF &&
  a/b/c
  abc
  bam
  bar
  foo
  j/k
  l
  m/m
* main
  mb
  n
  o/o
  o/p
  q
  r
  topic
EOF
        test_cmp expect actual
'

mv .git/config .git/config-saved

test_expect_success SHA1 'git branch -m q q2 without config should succeed' '
        git branch -m q q2 &&
        git branch -m q2 q
'

mv .git/config-saved .git/config

git config branch.s/s.dummy Hello

test_expect_success 'git branch -m s/s s should work when s/t is deleted' '
        git branch --create-reflog s/s &&
        git reflog exists refs/heads/s/s &&
        git branch --create-reflog s/t &&
        git reflog exists refs/heads/s/t &&
        git branch -d s/t &&
        git branch -m s/s s &&
        git reflog exists refs/heads/s
'

test_expect_success 'config information was renamed, too' '
        test $(git config branch.s.dummy) = Hello &&
        test_must_fail git config branch.s/s.dummy
'

test_expect_success 'git branch -m correctly renames multiple config sections' '
        test_when_finished "git checkout main" &&
        git checkout -b source main &&

        # Assert that a config file with multiple config sections has
        # those sections preserved...
        cat >expect <<-\EOF &&
        branch.dest.key1=value1
        some.gar.b=age
        branch.dest.key2=value2
        EOF
        cat >config.branch <<\EOF &&
;; Note the lack of -\EOF above & mixed indenting here. This is
;; intentional, we are also testing that the formatting of copied
;; sections is preserved.

;; Comment for source. Tabs
[branch "source"]
        ;; Comment for the source value
        key1 = value1
;; Comment for some.gar. Spaces
[some "gar"]
    ;; Comment for the some.gar value
    b = age
;; Comment for source, again. Mixed tabs/spaces.
[branch "source"]
    ;; Comment for the source value, again
        key2 = value2
EOF
        cat config.branch >>.git/config &&
        git branch -m source dest &&
        git config -f .git/config -l | grep -F -e source -e dest -e some.gar >actual &&
        test_cmp expect actual &&

        # ...and that the comments for those sections are also
        # preserved.
        cat config.branch | sed "s/\"source\"/\"dest\"/" >expect &&
        sed -n -e "/Note the lack/,\$p" .git/config >actual &&
        test_cmp expect actual
'

test_expect_success 'git branch -c dumps usage' '
        test_expect_code 128 git branch -c 2>err &&
        test_i18ngrep "branch name required" err
'

test_expect_success 'git branch --copy dumps usage' '
        test_expect_code 128 git branch --copy 2>err &&
        test_i18ngrep "branch name required" err
'

test_expect_success 'git branch -c d e should work' '
        git branch --create-reflog d &&
        git reflog exists refs/heads/d &&
        git config branch.d.dummy Hello &&
        git branch -c d e &&
        git reflog exists refs/heads/d &&
        git reflog exists refs/heads/e &&
        echo Hello >expect &&
        git config branch.e.dummy >actual &&
        test_cmp expect actual &&
        echo Hello >expect &&
        git config branch.d.dummy >actual &&
        test_cmp expect actual
'

test_expect_success 'git branch --copy is a synonym for -c' '
        git branch --create-reflog copy &&
        git reflog exists refs/heads/copy &&
        git config branch.copy.dummy Hello &&
        git branch --copy copy copy-to &&
        git reflog exists refs/heads/copy &&
        git reflog exists refs/heads/copy-to &&
        echo Hello >expect &&
        git config branch.copy.dummy >actual &&
        test_cmp expect actual &&
        echo Hello >expect &&
        git config branch.copy-to.dummy >actual &&
        test_cmp expect actual
'

test_expect_success 'git branch -c ee ef should copy ee to create branch ef' '
        git checkout -b ee &&
        git reflog exists refs/heads/ee &&
        git config branch.ee.dummy Hello &&
        git branch -c ee ef &&
        git reflog exists refs/heads/ee &&
        git reflog exists refs/heads/ef &&
        test $(git config branch.ee.dummy) = Hello &&
        test $(git config branch.ef.dummy) = Hello &&
        test $(git rev-parse --abbrev-ref HEAD) = ee
'

test_expect_success 'git branch -c f/f g/g should work' '
        git branch --create-reflog f/f &&
        git reflog exists refs/heads/f/f &&
        git config branch.f/f.dummy Hello &&
        git branch -c f/f g/g &&
        git reflog exists refs/heads/f/f &&
        git reflog exists refs/heads/g/g &&
        test $(git config branch.f/f.dummy) = Hello &&
        test $(git config branch.g/g.dummy) = Hello
'

test_expect_success 'git branch -c m2 m2 should work' '
        git branch --create-reflog m2 &&
        git reflog exists refs/heads/m2 &&
        git config branch.m2.dummy Hello &&
        git branch -c m2 m2 &&
        git reflog exists refs/heads/m2 &&
        test $(git config branch.m2.dummy) = Hello
'

test_expect_success 'git branch -c zz zz/zz should fail' '
        git branch --create-reflog zz &&
        git reflog exists refs/heads/zz &&
        test_must_fail git branch -c zz zz/zz
'

test_expect_success 'git branch -c b/b b should fail' '
        git branch --create-reflog b/b &&
        test_must_fail git branch -c b/b b
'

test_expect_success 'git branch -C o/q o/p should work when o/p exists' '
        git branch --create-reflog o/q &&
        git reflog exists refs/heads/o/q &&
        git reflog exists refs/heads/o/p &&
        git branch -C o/q o/p
'

test_expect_success 'git branch -c -f o/q o/p should work when o/p exists' '
        git reflog exists refs/heads/o/q &&
        git reflog exists refs/heads/o/p &&
        git branch -c -f o/q o/p
'

test_expect_success 'git branch -c qq rr/qq should fail when rr exists' '
        git branch qq &&
        git branch rr &&
        test_must_fail git branch -c qq rr/qq
'

test_expect_success 'git branch -C b1 b2 should fail when b2 is checked out' '
        git branch b1 &&
        git checkout -b b2 &&
        test_must_fail git branch -C b1 b2
'

test_expect_success 'git branch -C c1 c2 should succeed when c1 is checked out' '
        git checkout -b c1 &&
        git branch c2 &&
        git branch -C c1 c2 &&
        test $(git rev-parse --abbrev-ref HEAD) = c1
'

test_expect_success 'git branch -C c1 c2 should never touch HEAD' '
        msg="Branch: copied refs/heads/c1 to refs/heads/c2" &&
        ! grep "$msg$" .git/logs/HEAD
'

test_expect_success 'git branch -C main should work when main is checked out' '
        git checkout main &&
        git branch -C main
'

test_expect_success 'git branch -C main main should work when main is checked out' '
        git checkout main &&
        git branch -C main main
'

test_expect_success 'git branch -C main5 main5 should work when main is checked out' '
        git checkout main &&
        git branch main5 &&
        git branch -C main5 main5
'

test_expect_success 'git branch -C ab cd should overwrite existing config for cd' '
        git branch --create-reflog cd &&
        git reflog exists refs/heads/cd &&
        git config branch.cd.dummy CD &&
        git branch --create-reflog ab &&
        git reflog exists refs/heads/ab &&
        git config branch.ab.dummy AB &&
        git branch -C ab cd &&
        git reflog exists refs/heads/ab &&
        git reflog exists refs/heads/cd &&
        test $(git config branch.ab.dummy) = AB &&
        test $(git config branch.cd.dummy) = AB
'

test_expect_success 'git branch -c correctly copies multiple config sections' '
        FOO=1 &&
        export FOO &&
        test_when_finished "git checkout main" &&
        git checkout -b source2 main &&

        # Assert that a config file with multiple config sections has
        # those sections preserved...
        cat >expect <<-\EOF &&
        branch.source2.key1=value1
        branch.dest2.key1=value1
        more.gar.b=age
        branch.source2.key2=value2
        branch.dest2.key2=value2
        EOF
        cat >config.branch <<\EOF &&
;; Note the lack of -\EOF above & mixed indenting here. This is
;; intentional, we are also testing that the formatting of copied
;; sections is preserved.

;; Comment for source2. Tabs
[branch "source2"]
        ;; Comment for the source2 value
        key1 = value1
;; Comment for more.gar. Spaces
[more "gar"]
    ;; Comment for the more.gar value
    b = age
;; Comment for source2, again. Mixed tabs/spaces.
[branch "source2"]
    ;; Comment for the source2 value, again
        key2 = value2
EOF
        cat config.branch >>.git/config &&
        git branch -c source2 dest2 &&
        git config -f .git/config -l | grep -F -e source2 -e dest2 -e more.gar >actual &&
        test_cmp expect actual &&

        # ...and that the comments and formatting for those sections
        # is also preserved.
        cat >expect <<\EOF &&
;; Comment for source2. Tabs
[branch "source2"]
        ;; Comment for the source2 value
        key1 = value1
;; Comment for more.gar. Spaces
[branch "dest2"]
        ;; Comment for the source2 value
        key1 = value1
;; Comment for more.gar. Spaces
[more "gar"]
    ;; Comment for the more.gar value
    b = age
;; Comment for source2, again. Mixed tabs/spaces.
[branch "source2"]
    ;; Comment for the source2 value, again
        key2 = value2
[branch "dest2"]
    ;; Comment for the source2 value, again
        key2 = value2
EOF
        sed -n -e "/Comment for source2/,\$p" .git/config >actual &&
        test_cmp expect actual
'

test_expect_success 'deleting a symref' '
        git branch target &&
        git symbolic-ref refs/heads/symref refs/heads/target &&
        echo "Deleted branch symref (was refs/heads/target)." >expect &&
        git branch -d symref >actual &&
        test_path_is_file .git/refs/heads/target &&
        test_path_is_missing .git/refs/heads/symref &&
        test_cmp expect actual
'

test_expect_success 'deleting a dangling symref' '
        git symbolic-ref refs/heads/dangling-symref nowhere &&
        test_path_is_file .git/refs/heads/dangling-symref &&
        echo "Deleted branch dangling-symref (was nowhere)." >expect &&
        git branch -d dangling-symref >actual &&
        test_path_is_missing .git/refs/heads/dangling-symref &&
        test_cmp expect actual
'

test_expect_success 'deleting a self-referential symref' '
        git symbolic-ref refs/heads/self-reference refs/heads/self-reference &&
        test_path_is_file .git/refs/heads/self-reference &&
        echo "Deleted branch self-reference (was refs/heads/self-reference)." >expect &&
        git branch -d self-reference >actual &&
        test_path_is_missing .git/refs/heads/self-reference &&
        test_cmp expect actual
'

test_expect_success 'renaming a symref is not allowed' '
        git symbolic-ref refs/heads/topic refs/heads/main &&
        test_must_fail git branch -m topic new-topic &&
        git symbolic-ref refs/heads/topic &&
        test_path_is_file .git/refs/heads/main &&
        test_path_is_missing .git/refs/heads/new-topic
'

test_expect_success SYMLINKS 'git branch -m u v should fail when the reflog for u is a symlink' '
        git branch --create-reflog u &&
        mv .git/logs/refs/heads/u real-u &&
        ln -s real-u .git/logs/refs/heads/u &&
        test_must_fail git branch -m u v
'

test_expect_success SYMLINKS 'git branch -m with symlinked .git/refs' '
        test_when_finished "rm -rf subdir" &&
        git init --bare subdir &&

        rm -rfv subdir/refs subdir/objects subdir/packed-refs &&
        ln -s ../.git/refs subdir/refs &&
        ln -s ../.git/objects subdir/objects &&
        ln -s ../.git/packed-refs subdir/packed-refs &&

        git -C subdir rev-parse --absolute-git-dir >subdir.dir &&
        git rev-parse --absolute-git-dir >our.dir &&
        ! test_cmp subdir.dir our.dir &&

        git -C subdir log &&
        git -C subdir branch rename-src &&
        git rev-parse rename-src >expect &&
        git -C subdir branch -m rename-src rename-dest &&
        git rev-parse rename-dest >actual &&
        test_cmp expect actual &&
        git branch -D rename-dest
'

test_expect_success 'test tracking setup via --track' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track my1 local/main &&
        test $(git config branch.my1.remote) = local &&
        test $(git config branch.my1.merge) = refs/heads/main
'

test_expect_success 'test tracking setup (non-wildcard, matching)' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/main:refs/remotes/local/main &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track my4 local/main &&
        test $(git config branch.my4.remote) = local &&
        test $(git config branch.my4.merge) = refs/heads/main
'

test_expect_success 'tracking setup fails on non-matching refspec' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git config remote.local.fetch refs/heads/s:refs/remotes/local/s &&
        test_must_fail git branch --track my5 local/main &&
        test_must_fail git config branch.my5.remote &&
        test_must_fail git config branch.my5.merge
'

test_expect_success 'test tracking setup via config' '
        git config branch.autosetupmerge true &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch my3 local/main &&
        test $(git config branch.my3.remote) = local &&
        test $(git config branch.my3.merge) = refs/heads/main
'

test_expect_success 'test overriding tracking setup via --no-track' '
        git config branch.autosetupmerge true &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track my2 local/main &&
        git config branch.autosetupmerge false &&
        ! test "$(git config branch.my2.remote)" = local &&
        ! test "$(git config branch.my2.merge)" = refs/heads/main
'

test_expect_success 'no tracking without .fetch entries' '
        git config branch.autosetupmerge true &&
        git branch my6 s &&
        git config branch.autosetupmerge false &&
        test -z "$(git config branch.my6.remote)" &&
        test -z "$(git config branch.my6.merge)"
'

test_expect_success 'test tracking setup via --track but deeper' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/o/o || git fetch local) &&
        git branch --track my7 local/o/o &&
        test "$(git config branch.my7.remote)" = local &&
        test "$(git config branch.my7.merge)" = refs/heads/o/o
'

test_expect_success 'test deleting branch deletes branch config' '
        git branch -d my7 &&
        test -z "$(git config branch.my7.remote)" &&
        test -z "$(git config branch.my7.merge)"
'

test_expect_success 'test deleting branch without config' '
        git branch my7 s &&
        sha1=$(git rev-parse my7 | cut -c 1-7) &&
        echo "Deleted branch my7 (was $sha1)." >expect &&
        git branch -d my7 >actual 2>&1 &&
        test_cmp expect actual
'

test_expect_success 'deleting currently checked out branch fails' '
        git worktree add -b my7 my7 &&
        test_must_fail git -C my7 branch -d my7 &&
        test_must_fail git branch -d my7 &&
        rm -r my7 &&
        git worktree prune
'

test_expect_success 'test --track without .fetch entries' '
        git branch --track my8 &&
        test "$(git config branch.my8.remote)" &&
        test "$(git config branch.my8.merge)"
'

test_expect_success 'branch from non-branch HEAD w/autosetupmerge=always' '
        git config branch.autosetupmerge always &&
        git branch my9 HEAD^ &&
        git config branch.autosetupmerge false
'

test_expect_success 'branch from non-branch HEAD w/--track causes failure' '
        test_must_fail git branch --track my10 HEAD^
'

test_expect_success 'branch from tag w/--track causes failure' '
        git tag foobar &&
        test_must_fail git branch --track my11 foobar
'

test_expect_success 'simple tracking works when remote branch name matches' '
        test_when_finished "rm -rf otherserver" &&
        git init otherserver &&
        test_commit -C otherserver my_commit 1 &&
        git -C otherserver branch feature &&
        test_config branch.autosetupmerge simple &&
        test_config remote.otherserver.url otherserver &&
        test_config remote.otherserver.fetch refs/heads/*:refs/remotes/otherserver/* &&
        git fetch otherserver &&
        git branch feature otherserver/feature &&
        test_cmp_config otherserver branch.feature.remote &&
        test_cmp_config refs/heads/feature branch.feature.merge
'

test_expect_success 'simple tracking skips when remote branch name does not match' '
        test_config branch.autosetupmerge simple &&
        test_config remote.local.url . &&
        test_config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git fetch local &&
        git branch my-other local/main &&
        test_cmp_config "" --default "" branch.my-other.remote &&
        test_cmp_config "" --default "" branch.my-other.merge
'

test_expect_success 'simple tracking skips when remote ref is not a branch' '
        test_config branch.autosetupmerge simple &&
        test_config remote.localtags.url . &&
        test_config remote.localtags.fetch refs/tags/*:refs/remotes/localtags/* &&
        git tag mytag12 main &&
        git fetch localtags &&
        git branch mytag12 localtags/mytag12 &&
        test_cmp_config "" --default "" branch.mytag12.remote &&
        test_cmp_config "" --default "" branch.mytag12.merge
'

test_expect_success '--set-upstream-to fails on multiple branches' '
        echo "fatal: too many arguments to set new upstream" >expect &&
        test_must_fail git branch --set-upstream-to main a b c 2>err &&
        test_cmp expect err
'

test_expect_success '--set-upstream-to fails on detached HEAD' '
        git checkout HEAD^{} &&
        test_when_finished git checkout - &&
        echo "fatal: could not set upstream of HEAD to main when it does not point to any branch." >expect &&
        test_must_fail git branch --set-upstream-to main 2>err &&
        test_cmp expect err
'

test_expect_success '--set-upstream-to fails on a missing dst branch' '
        echo "fatal: branch '"'"'does-not-exist'"'"' does not exist" >expect &&
        test_must_fail git branch --set-upstream-to main does-not-exist 2>err &&
        test_cmp expect err
'

test_expect_success '--set-upstream-to fails on a missing src branch' '
        test_must_fail git branch --set-upstream-to does-not-exist main 2>err &&
        test_i18ngrep "the requested upstream branch '"'"'does-not-exist'"'"' does not exist" err
'

test_expect_success '--set-upstream-to fails on a non-ref' '
        echo "fatal: cannot set up tracking information; starting point '"'"'HEAD^{}'"'"' is not a branch" >expect &&
        test_must_fail git branch --set-upstream-to HEAD^{} 2>err &&
        test_cmp expect err
'

test_expect_success '--set-upstream-to fails on locked config' '
        test_when_finished "rm -f .git/config.lock" &&
        >.git/config.lock &&
        git branch locked &&
        test_must_fail git branch --set-upstream-to locked 2>err &&
        test_i18ngrep "could not lock config file .git/config" err
'

test_expect_success 'use --set-upstream-to modify HEAD' '
        test_config branch.main.remote foo &&
        test_config branch.main.merge foo &&
        git branch my12 &&
        git branch --set-upstream-to my12 &&
        test "$(git config branch.main.remote)" = "." &&
        test "$(git config branch.main.merge)" = "refs/heads/my12"
'

test_expect_success 'use --set-upstream-to modify a particular branch' '
        git branch my13 &&
        git branch --set-upstream-to main my13 &&
        test_when_finished "git branch --unset-upstream my13" &&
        test "$(git config branch.my13.remote)" = "." &&
        test "$(git config branch.my13.merge)" = "refs/heads/main"
'

test_expect_success '--unset-upstream should fail if given a non-existent branch' '
        echo "fatal: Branch '"'"'i-dont-exist'"'"' has no upstream information" >expect &&
        test_must_fail git branch --unset-upstream i-dont-exist 2>err &&
        test_cmp expect err
'

test_expect_success '--unset-upstream should fail if config is locked' '
        test_when_finished "rm -f .git/config.lock" &&
        git branch --set-upstream-to locked &&
        >.git/config.lock &&
        test_must_fail git branch --unset-upstream 2>err &&
        test_i18ngrep "could not lock config file .git/config" err
'

test_expect_success 'test --unset-upstream on HEAD' '
        git branch my14 &&
        test_config branch.main.remote foo &&
        test_config branch.main.merge foo &&
        git branch --set-upstream-to my14 &&
        git branch --unset-upstream &&
        test_must_fail git config branch.main.remote &&
        test_must_fail git config branch.main.merge &&
        # fail for a branch without upstream set
        echo "fatal: Branch '"'"'main'"'"' has no upstream information" >expect &&
        test_must_fail git branch --unset-upstream 2>err &&
        test_cmp expect err
'

test_expect_success '--unset-upstream should fail on multiple branches' '
        echo "fatal: too many arguments to unset upstream" >expect &&
        test_must_fail git branch --unset-upstream a b c 2>err &&
        test_cmp expect err
'

test_expect_success '--unset-upstream should fail on detached HEAD' '
        git checkout HEAD^{} &&
        test_when_finished git checkout - &&
        echo "fatal: could not unset upstream of HEAD when it does not point to any branch." >expect &&
        test_must_fail git branch --unset-upstream 2>err &&
        test_cmp expect err
'

test_expect_success 'test --unset-upstream on a particular branch' '
        git branch my15 &&
        git branch --set-upstream-to main my14 &&
        git branch --unset-upstream my14 &&
        test_must_fail git config branch.my14.remote &&
        test_must_fail git config branch.my14.merge
'

test_expect_success 'disabled option --set-upstream fails' '
        test_must_fail git branch --set-upstream origin/main
'

test_expect_success '--set-upstream-to notices an error to set branch as own upstream' "
        git branch --set-upstream-to refs/heads/my13 my13 2>actual &&
        cat >expect <<-\EOF &&
        warning: not setting branch 'my13' as its own upstream
        EOF
        test_expect_code 1 git config branch.my13.remote &&
        test_expect_code 1 git config branch.my13.merge &&
        test_cmp expect actual
"

# Keep this test last, as it changes the current branch
cat >expect <<EOF
$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000     branch: Created from main
EOF
test_expect_success 'git checkout -b g/h/i -l should create a branch and a log' '
        GIT_COMMITTER_DATE="2005-05-26 23:30" \
        git checkout -b g/h/i -l main &&
        test_path_is_file .git/refs/heads/g/h/i &&
        test_path_is_file .git/logs/refs/heads/g/h/i &&
        test_cmp expect .git/logs/refs/heads/g/h/i
'

test_expect_success 'checkout -b makes reflog by default' '
        git checkout main &&
        git config --unset core.logAllRefUpdates &&
        git checkout -b alpha &&
        git rev-parse --verify alpha@{0}
'

test_expect_success 'checkout -b does not make reflog when core.logAllRefUpdates = false' '
        git checkout main &&
        git config core.logAllRefUpdates false &&
        git checkout -b beta &&
        test_must_fail git rev-parse --verify beta@{0}
'

test_expect_success 'checkout -b with -l makes reflog when core.logAllRefUpdates = false' '
        git checkout main &&
        git checkout -lb gamma &&
        git config --unset core.logAllRefUpdates &&
        git rev-parse --verify gamma@{0}
'

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 &&
        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)"
'

test_expect_success 'autosetuprebase local on a tracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase local &&
        (git show-ref -q refs/remotes/local/o || git fetch local) &&
        git branch mybase &&
        git branch --track myr1 mybase &&
        test "$(git config branch.myr1.remote)" = . &&
        test "$(git config branch.myr1.merge)" = refs/heads/mybase &&
        test "$(git config branch.myr1.rebase)" = true
'

test_expect_success 'autosetuprebase always on a tracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase always &&
        (git show-ref -q refs/remotes/local/o || git fetch local) &&
        git branch mybase2 &&
        git branch --track myr2 mybase &&
        test "$(git config branch.myr2.remote)" = . &&
        test "$(git config branch.myr2.merge)" = refs/heads/mybase &&
        test "$(git config branch.myr2.rebase)" = true
'

test_expect_success 'autosetuprebase remote on a tracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase remote &&
        (git show-ref -q refs/remotes/local/o || git fetch local) &&
        git branch mybase3 &&
        git branch --track myr3 mybase2 &&
        test "$(git config branch.myr3.remote)" = . &&
        test "$(git config branch.myr3.merge)" = refs/heads/mybase2 &&
        ! test "$(git config branch.myr3.rebase)" = true
'

test_expect_success 'autosetuprebase never on a tracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase never &&
        (git show-ref -q refs/remotes/local/o || git fetch local) &&
        git branch mybase4 &&
        git branch --track myr4 mybase2 &&
        test "$(git config branch.myr4.remote)" = . &&
        test "$(git config branch.myr4.merge)" = refs/heads/mybase2 &&
        ! test "$(git config branch.myr4.rebase)" = true
'

test_expect_success 'autosetuprebase local on a tracked remote branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase local &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track myr5 local/main &&
        test "$(git config branch.myr5.remote)" = local &&
        test "$(git config branch.myr5.merge)" = refs/heads/main &&
        ! test "$(git config branch.myr5.rebase)" = true
'

test_expect_success 'autosetuprebase never on a tracked remote branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase never &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track myr6 local/main &&
        test "$(git config branch.myr6.remote)" = local &&
        test "$(git config branch.myr6.merge)" = refs/heads/main &&
        ! test "$(git config branch.myr6.rebase)" = true
'

test_expect_success 'autosetuprebase remote on a tracked remote branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase remote &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track myr7 local/main &&
        test "$(git config branch.myr7.remote)" = local &&
        test "$(git config branch.myr7.merge)" = refs/heads/main &&
        test "$(git config branch.myr7.rebase)" = true
'

test_expect_success 'autosetuprebase always on a tracked remote branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        git config branch.autosetuprebase remote &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track myr8 local/main &&
        test "$(git config branch.myr8.remote)" = local &&
        test "$(git config branch.myr8.merge)" = refs/heads/main &&
        test "$(git config branch.myr8.rebase)" = true
'

test_expect_success 'autosetuprebase unconfigured on a tracked remote branch' '
        git config --unset branch.autosetuprebase &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --track myr9 local/main &&
        test "$(git config branch.myr9.remote)" = local &&
        test "$(git config branch.myr9.merge)" = refs/heads/main &&
        test "z$(git config branch.myr9.rebase)" = z
'

test_expect_success 'autosetuprebase unconfigured on a tracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/o || git fetch local) &&
        git branch mybase10 &&
        git branch --track myr10 mybase2 &&
        test "$(git config branch.myr10.remote)" = . &&
        test "$(git config branch.myr10.merge)" = refs/heads/mybase2 &&
        test "z$(git config branch.myr10.rebase)" = z
'

test_expect_success 'autosetuprebase unconfigured on untracked local branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr11 mybase2 &&
        test "z$(git config branch.myr11.remote)" = z &&
        test "z$(git config branch.myr11.merge)" = z &&
        test "z$(git config branch.myr11.rebase)" = z
'

test_expect_success 'autosetuprebase unconfigured on untracked remote branch' '
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr12 local/main &&
        test "z$(git config branch.myr12.remote)" = z &&
        test "z$(git config branch.myr12.merge)" = z &&
        test "z$(git config branch.myr12.rebase)" = z
'

test_expect_success 'autosetuprebase never on an untracked local branch' '
        git config branch.autosetuprebase never &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr13 mybase2 &&
        test "z$(git config branch.myr13.remote)" = z &&
        test "z$(git config branch.myr13.merge)" = z &&
        test "z$(git config branch.myr13.rebase)" = z
'

test_expect_success 'autosetuprebase local on an untracked local branch' '
        git config branch.autosetuprebase local &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr14 mybase2 &&
        test "z$(git config branch.myr14.remote)" = z &&
        test "z$(git config branch.myr14.merge)" = z &&
        test "z$(git config branch.myr14.rebase)" = z
'

test_expect_success 'autosetuprebase remote on an untracked local branch' '
        git config branch.autosetuprebase remote &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr15 mybase2 &&
        test "z$(git config branch.myr15.remote)" = z &&
        test "z$(git config branch.myr15.merge)" = z &&
        test "z$(git config branch.myr15.rebase)" = z
'

test_expect_success 'autosetuprebase always on an untracked local branch' '
        git config branch.autosetuprebase always &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr16 mybase2 &&
        test "z$(git config branch.myr16.remote)" = z &&
        test "z$(git config branch.myr16.merge)" = z &&
        test "z$(git config branch.myr16.rebase)" = z
'

test_expect_success 'autosetuprebase never on an untracked remote branch' '
        git config branch.autosetuprebase never &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr17 local/main &&
        test "z$(git config branch.myr17.remote)" = z &&
        test "z$(git config branch.myr17.merge)" = z &&
        test "z$(git config branch.myr17.rebase)" = z
'

test_expect_success 'autosetuprebase local on an untracked remote branch' '
        git config branch.autosetuprebase local &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr18 local/main &&
        test "z$(git config branch.myr18.remote)" = z &&
        test "z$(git config branch.myr18.merge)" = z &&
        test "z$(git config branch.myr18.rebase)" = z
'

test_expect_success 'autosetuprebase remote on an untracked remote branch' '
        git config branch.autosetuprebase remote &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr19 local/main &&
        test "z$(git config branch.myr19.remote)" = z &&
        test "z$(git config branch.myr19.merge)" = z &&
        test "z$(git config branch.myr19.rebase)" = z
'

test_expect_success 'autosetuprebase always on an untracked remote branch' '
        git config branch.autosetuprebase always &&
        git config remote.local.url . &&
        git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
        (git show-ref -q refs/remotes/local/main || git fetch local) &&
        git branch --no-track myr20 local/main &&
        test "z$(git config branch.myr20.remote)" = z &&
        test "z$(git config branch.myr20.merge)" = z &&
        test "z$(git config branch.myr20.rebase)" = z
'

test_expect_success 'autosetuprebase always on detached HEAD' '
        git config branch.autosetupmerge always &&
        test_when_finished git checkout main &&
        git checkout HEAD^0 &&
        git branch my11 &&
        test -z "$(git config branch.my11.remote)" &&
        test -z "$(git config branch.my11.merge)"
'

test_expect_success 'detect misconfigured autosetuprebase (bad value)' '
        git config branch.autosetuprebase garbage &&
        test_must_fail git branch
'

test_expect_success 'detect misconfigured autosetuprebase (no value)' '
        git config --unset branch.autosetuprebase &&
        echo "[branch] autosetuprebase" >>.git/config &&
        test_must_fail git branch &&
        git config --unset branch.autosetuprebase
'

test_expect_success 'attempt to delete a branch without base and unmerged to HEAD' '
        git checkout my9 &&
        git config --unset branch.my8.merge &&
        test_must_fail git branch -d my8
'

test_expect_success 'attempt to delete a branch merged to its base' '
        # we are on my9 which is the initial commit; traditionally
        # we would not have allowed deleting my8 that is not merged
        # to my9, but it is set to track main that already has my8
        git config branch.my8.merge refs/heads/main &&
        git branch -d my8
'

test_expect_success 'attempt to delete a branch merged to its base' '
        git checkout main &&
        echo Third >>A &&
        git commit -m "Third commit" A &&
        git branch -t my10 my9 &&
        git branch -f my10 HEAD^ &&
        # we are on main which is at the third commit, and my10
        # is behind us, so traditionally we would have allowed deleting
        # it; but my10 is set to track my9 that is further behind.
        test_must_fail git branch -d my10
'

test_expect_success 'branch --delete --force removes dangling branch' '
        git checkout main &&
        test_commit unstable &&
        hash=$(git rev-parse HEAD) &&
        objpath=$(echo $hash | sed -e "s|^..|.git/objects/&/|") &&
        git branch --no-track dangling &&
        mv $objpath $objpath.x &&
        test_when_finished "mv $objpath.x $objpath" &&
        git branch --delete --force dangling &&
        git for-each-ref refs/heads/dangling >actual &&
        test_must_be_empty actual
'

test_expect_success 'use --edit-description' '
        EDITOR=: git branch --edit-description &&
        test_must_fail git config branch.main.description &&

        write_script editor <<-\EOF &&
                echo "New contents" >"$1"
        EOF
        EDITOR=./editor git branch --edit-description &&
                write_script editor <<-\EOF &&
                git stripspace -s <"$1" >"EDITOR_OUTPUT"
        EOF
        EDITOR=./editor git branch --edit-description &&
        echo "New contents" >expect &&
        test_cmp expect EDITOR_OUTPUT
'

test_expect_success 'detect typo in branch name when using --edit-description' '
        write_script editor <<-\EOF &&
                echo "New contents" >"$1"
        EOF
        test_must_fail env EDITOR=./editor git branch --edit-description no-such-branch
'

test_expect_success 'refuse --edit-description on unborn branch for now' '
        test_when_finished "git checkout main" &&
        write_script editor <<-\EOF &&
                echo "New contents" >"$1"
        EOF
        git checkout --orphan unborn &&
        test_must_fail env EDITOR=./editor git branch --edit-description
'

test_expect_success '--merged catches invalid object names' '
        test_must_fail git branch --merged 0000000000000000000000000000000000000000
'

test_expect_success '--list during rebase' '
        test_when_finished "reset_rebase" &&
        git checkout main &&
        FAKE_LINES="1 edit 2" &&
        export FAKE_LINES &&
        set_fake_editor &&
        git rebase -i HEAD~2 &&
        git branch --list >actual &&
        test_i18ngrep "rebasing main" actual
'

test_expect_success '--list during rebase from detached HEAD' '
        test_when_finished "reset_rebase && git checkout main" &&
        git checkout main^0 &&
        oid=$(git rev-parse --short HEAD) &&
        FAKE_LINES="1 edit 2" &&
        export FAKE_LINES &&
        set_fake_editor &&
        git rebase -i HEAD~2 &&
        git branch --list >actual &&
        test_i18ngrep "rebasing detached HEAD $oid" actual
'

test_expect_success 'tracking with unexpected .fetch refspec' '
        rm -rf a b c d &&
        git init -b main a &&
        (
                cd a &&
                test_commit a
        ) &&
        git init -b main b &&
        (
                cd b &&
                test_commit b
        ) &&
        git init -b main c &&
        (
                cd c &&
                test_commit c &&
                git remote add a ../a &&
                git remote add b ../b &&
                git fetch --all
        ) &&
        git init -b main d &&
        (
                cd d &&
                git remote add c ../c &&
                git config remote.c.fetch "+refs/remotes/*:refs/remotes/*" &&
                git fetch c &&
                git branch --track local/a/main remotes/a/main &&
                test "$(git config branch.local/a/main.remote)" = "c" &&
                test "$(git config branch.local/a/main.merge)" = "refs/remotes/a/main" &&
                git rev-parse --verify a >expect &&
                git rev-parse --verify local/a/main >actual &&
                test_cmp expect actual
        )
'

test_expect_success 'configured committerdate sort' '
        git init -b main sort &&
        (
                cd sort &&
                git config branch.sort committerdate &&
                test_commit initial &&
                git checkout -b a &&
                test_commit a &&
                git checkout -b c &&
                test_commit c &&
                git checkout -b b &&
                test_commit b &&
                git branch >actual &&
                cat >expect <<-\EOF &&
                  main
                  a
                  c
                * b
                EOF
                test_cmp expect actual
        )
'

test_expect_success 'option override configured sort' '
        (
                cd sort &&
                git config branch.sort committerdate &&
                git branch --sort=refname >actual &&
                cat >expect <<-\EOF &&
                  a
                * b
                  c
                  main
                EOF
                test_cmp expect actual
        )
'

test_expect_success 'invalid sort parameter in configuration' '
        (
                cd sort &&
                git config branch.sort "v:notvalid" &&

                # this works in the "listing" mode, so bad sort key
                # is a dying offence.
                test_must_fail git branch &&

                # these do not need to use sorting, and should all
                # succeed
                git branch newone main &&
                git branch -c newone newerone &&
                git branch -m newone newestone &&
                git branch -d newerone newestone
        )
'

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