21 lines
795 B
Nix
21 lines
795 B
Nix
{ coreutils, git, writeDashBin }:
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writeDashBin "git-preview" ''
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set -efu
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head_commit=$(${git}/bin/git log -1 --format=%H)
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merge_commit=$1; shift
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merge_message='Merge for git-preview'
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preview_dir=$(${coreutils}/bin/mktemp --tmpdir -d git-preview.XXXXXXXX)
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preview_name=$(${coreutils}/bin/basename "$preview_dir")
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${git}/bin/git worktree add --detach -f "$preview_dir" 2>/dev/null
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${git}/bin/git -C "$preview_dir" checkout -q "$head_commit"
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${git}/bin/git -C "$preview_dir" merge \
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''${GIT_PREVIEW_MERGE_STRATEGY+-s "$GIT_PREVIEW_MERGE_STRATEGY"} \
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-m "$merge_message" \
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-q \
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"$merge_commit"
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${git}/bin/git -C "$preview_dir" diff "$head_commit.." "$@"
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${coreutils}/bin/rm -fR "$preview_dir"
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${coreutils}/bin/rm -R .git/worktrees/"$preview_name"
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''
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