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60 lines
2.0 KiB
Bash
60 lines
2.0 KiB
Bash
#!/usr/bin/env bash
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# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This git extension converts a chromium commit number to its git commit hash.
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# It accepts the following input formats:
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#
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# $ git crrev-parse Cr-Commit-Position: refs/heads/main@{#311769}
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# $ git crrev-parse ' Cr-Commit-Position: refs/heads/main@{#311769}'
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# $ git crrev-parse 'Cr-Commit-Position: refs/heads/main@{#311769}'
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# $ git crrev-parse refs/heads/main@{#311769}
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#
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# It also works for branches (assuming you have branches in your local
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# checkout):
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#
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# $ git crrev-parse refs/branch-heads/2278@{#2}
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#
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# If you don't specify a branch, refs/heads/main is assumed:
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#
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# $ git crrev-parse @{#311769}
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# $ git crrev-parse 311769
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# Developer note: this script makes heavy use of prefix/suffix/pattern
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# substitution for bash variables. Refer to the "Parameter Expansion"
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# section of the man page for bash.
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while [ -n "$1" ]; do
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if [[ "$1" = "Cr-Commit-Position:" ]] && [[ "$2" =~ .*@\{#[0-9][0-9]*\} ]]; then
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commit_pos="$2"
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shift
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else
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commit_pos="${1#*Cr-Commit-Position: }"
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fi
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ref="${commit_pos%@\{#*\}}"
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if [ "$ref" = "$commit_pos" -o -z "$ref" ]; then
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ref="refs/heads/main"
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fi
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remote_ref="${ref/refs\/heads/refs\/remotes\/origin}"
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remote_ref="${remote_ref/refs\/branch-heads/refs\/remotes\/branch-heads}"
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remote_ref="${remote_ref//\\}"
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num="${commit_pos#*@\{\#}"
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num="${num%\}}"
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if [ -z "$ref" -o -z "$num" ]; then
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git rev-parse "$1"
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else
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# When the ref is not specified on the command-line, accept either
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# Cr-refs/heads/master@{#$NUM} or refs/heads/main@{#$NUM}.
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if [[ "$ref" = "refs/heads/main" ]]; then
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grep_str="^Cr-Commit-Position: refs/heads/(master|main)@\\{#$num\\}"
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else
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grep_str="^Cr-Commit-Position: $ref@\\{#$num\\}"
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fi
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git rev-list -n 1 --extended-regexp --grep="$grep_str" "$remote_ref"
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fi
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shift
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done
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