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authorLibravatar Junio C Hamano <gitster@pobox.com>2011-06-05 22:17:04 -0700
committerLibravatar Junio C Hamano <gitster@pobox.com>2011-06-05 22:17:04 -0700
commitc17b229454ac3f5d20fd0cff3a663b03c13cb38e (patch)
treef6b58684601a2da3bc6cf802ce764f072dd5c932 /Documentation/RelNotes-1.5.0.1.txt
parentbuiltin/checkout: learn -B (diff)
downloadtgif-c17b229454ac3f5d20fd0cff3a663b03c13cb38e.tar.xz
checkout -b <name>: correctly detect existing branch
When create a new branch, we fed "refs/heads/<proposed name>" as a string to get_sha1() and expected it to fail when a branch already exists. The right way to check if a ref exists is to check with resolve_ref(). A naïve solution that might appear attractive but does not work is to forbid slashes in get_describe_name() but that will not work. A describe name is is in the form of "ANYTHING-g<short sha1>", and that ANYTHING part comes from a original tag name used in the repository the user ran the describe command. A sick user could have a confusing hierarchical tag whose name is "refs/heads/foobar" (stored as refs/tags/refs/heads/foobar") to generate a describe name "refs/heads/foobar-6-g02ac983", and we should be able to use that name to refer to the object whose name is 02ac983. Signed-off-by: Junio C Hamano <gitster@pobox.com>
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