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- #!/usr/bin/env bash
- # git diff.external wrapper: render diffs with difftastic when it's installed,
- # else fall back to a plain unified diff so `git diff` never hard-fails on a
- # machine without difft.
- #
- # git calls an external differ with 7 args:
- # path old-file old-hex old-mode new-file new-hex new-mode
- if command -v difft >/dev/null 2>&1; then
- exec difft "$@"
- fi
- # Fallback: plain unified diff. `diff` exits 1 when files differ, but git treats a
- # non-zero exit from an external differ as failure ("external diff died"), so we
- # swallow it and always exit 0.
- diff -u -L "a/$1" -L "b/$1" -- "$2" "$5" || true
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