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When flipping commits around on topic branches, I often end up doing this sequence: * Run "log --oneline next..jc/frotz" to find out the first commit on 'jc/frotz' branch not yet merged to 'next'; * Run "checkout $that_commit^" to detach HEAD to the parent of it; * Rebuild the series on top of that commit; and * "show-branch jc/frotz HEAD" and "diff jc/frotz HEAD" to verify. Introduce a new syntax to "git checkout" to name the commit to switch to, to make the first two steps easier. When the branch to switch to is specified as A...B (you can omit either A or B but not both, and HEAD is used instead of the omitted side), the merge base between these two commits are computed, and if there is one unique one, we detach the HEAD at that commit. With this, I can say "checkout next...jc/frotz". Signed-off-by: Junio C Hamano <gitster@pobox.com>
119 lines
2.7 KiB
Bash
Executable file
119 lines
2.7 KiB
Bash
Executable file
#!/bin/sh
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test_description='checkout can switch to last branch and merge base'
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. ./test-lib.sh
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test_expect_success 'setup' '
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echo hello >world &&
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git add world &&
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git commit -m initial &&
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git branch other &&
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echo "hello again" >>world &&
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git add world &&
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git commit -m second
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'
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test_expect_success '"checkout -" does not work initially' '
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test_must_fail git checkout -
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'
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test_expect_success 'first branch switch' '
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git checkout other
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'
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test_expect_success '"checkout -" switches back' '
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git checkout - &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/master"
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'
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test_expect_success '"checkout -" switches forth' '
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git checkout - &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/other"
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'
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test_expect_success 'detach HEAD' '
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git checkout $(git rev-parse HEAD)
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'
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test_expect_success '"checkout -" attaches again' '
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git checkout - &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/other"
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'
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test_expect_success '"checkout -" detaches again' '
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git checkout - &&
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test "z$(git rev-parse HEAD)" = "z$(git rev-parse other)" &&
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test_must_fail git symbolic-ref HEAD
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'
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test_expect_success 'more switches' '
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for i in 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
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do
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git checkout -b branch$i
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done
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'
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more_switches () {
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for i in 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
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do
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git checkout branch$i
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done
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}
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test_expect_success 'switch to the last' '
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more_switches &&
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git checkout @{-1} &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch2"
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'
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test_expect_success 'switch to second from the last' '
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more_switches &&
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git checkout @{-2} &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch3"
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'
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test_expect_success 'switch to third from the last' '
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more_switches &&
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git checkout @{-3} &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch4"
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'
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test_expect_success 'switch to fourth from the last' '
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more_switches &&
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git checkout @{-4} &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch5"
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'
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test_expect_success 'switch to twelfth from the last' '
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more_switches &&
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git checkout @{-12} &&
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test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch13"
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'
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test_expect_success 'merge base test setup' '
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git checkout -b another other &&
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echo "hello again" >>world &&
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git add world &&
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git commit -m third
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'
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test_expect_success 'another...master' '
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git checkout another &&
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git checkout another...master &&
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test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify master^)"
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'
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test_expect_success '...master' '
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git checkout another &&
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git checkout ...master &&
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test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify master^)"
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'
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test_expect_success 'master...' '
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git checkout another &&
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git checkout master... &&
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test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify master^)"
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'
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test_done
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