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#!/bin/sh

test_description='clone --branch option'
. ./test-lib.sh

check_HEAD() {
	echo refs/heads/"$1" >expect &&
	git symbolic-ref HEAD >actual &&
	test_cmp expect actual
}

check_file() {
	echo "$1" >expect &&
	test_cmp expect file
}

test_expect_success 'setup' '
	mkdir parent &&
	(cd parent && git init &&
	 echo one >file && git add file && git commit -m one &&
	 git checkout -b two &&
	 echo two >file && git add file && git commit -m two &&
	 blob=$(git rev-parse HEAD:file) &&
	 echo $blob > .git/refs/heads/broken-tag &&
	 echo $blob > .git/refs/heads/broken-head &&
	 git checkout master) &&
	mkdir empty &&
	(cd empty && git init)
'

test_expect_success 'vanilla clone chooses HEAD' '
	git clone parent clone &&
	(cd clone &&
	 check_HEAD master &&
	 check_file one
	)
'

test_expect_success 'clone -b chooses specified branch' '
	git clone -b two parent clone-two &&
	(cd clone-two &&
	 check_HEAD two &&
	 check_file two
	)
'

test_expect_success 'clone -b sets up tracking' '
	(cd clone-two &&
	 echo origin >expect &&
	 git config branch.two.remote >actual &&
	 echo refs/heads/two >>expect &&
	 git config branch.two.merge >>actual &&
	 test_cmp expect actual
	)
'

test_expect_success 'clone -b does not munge remotes/origin/HEAD' '
	(cd clone-two &&
	 echo refs/remotes/origin/master >expect &&
	 git symbolic-ref refs/remotes/origin/HEAD >actual &&
	 test_cmp expect actual
	)
'

test_expect_success 'clone -b with bogus branch' '
	test_must_fail git clone -b bogus parent clone-bogus
'

test_expect_success 'clone -b not allowed with empty repos' '
	test_must_fail git clone -b branch empty clone-branch-empty
'

test_expect_success 'cloning -b for invalid tag must fail and fallback on remote head' '
	test_must_fail git clone -b broken-tag parent broken-tag 2>error &&
	test_i18ngrep "non-commit branch cannot be checked out." error &&
	(cd broken-tag && check_HEAD master)
'

test_expect_success 'cloning -b for broken head must fail and fallback on remote head' '
	test_must_fail git clone -b broken-head parent broken-head &&
	test_i18ngrep "non-commit branch cannot be checked out." error &&
	(cd broken-head && check_HEAD master)
'

test_done
debug log:

solving a589db9aa0 ...
found a589db9aa0 in https://public-inbox.org/git/pull.906.v2.git.git.1604510485432.gitgitgadget@gmail.com/
found 6e7a7be052 in git.git.git
preparing index
index prepared:
100755 6e7a7be052276613bf5f83551d93b4d90536ea4e	t/t5609-clone-branch.sh

applying [1/1] https://public-inbox.org/git/pull.906.v2.git.git.1604510485432.gitgitgadget@gmail.com/
diff --git a/t/t5609-clone-branch.sh b/t/t5609-clone-branch.sh
index 6e7a7be052..a589db9aa0 100755

Checking patch t/t5609-clone-branch.sh...
Applied patch t/t5609-clone-branch.sh cleanly.

index at:
100755 a589db9aa0c3e27842af37279e254d0ff1c68704	t/t5609-clone-branch.sh

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