93 lines
2.7 KiB
Bash
93 lines
2.7 KiB
Bash
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#!/bin/sh
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#
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# Reindent C sources to the project's canonical style (cc-mode "stroustrup",
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# 4-column offset, 8-column tabs). See AGENTS.md -> "Coding Style".
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#
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# scripts/reindent.sh reindent every tracked C source in place
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# scripts/reindent.sh FILE... reindent only the named files
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# scripts/reindent.sh --check ... report non-conforming files, change nothing
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#
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# Exit status: 0 if everything already conforms (or was reindented), 1 if
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# --check found a file that needs reindenting, 2 on a usage or environment
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# error.
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set -eu
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root=$(git rev-parse --show-toplevel)
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elisp="$root/scripts/reindent.el"
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# Directories whose C sources are hand-maintained. Anything outside these is
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# vendored (deps/) or generated (include/akgl/SDL_GameControllerDB.h) and is
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# left alone.
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SCOPE='src include tests util'
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GENERATED='include/akgl/SDL_GameControllerDB.h'
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check=0
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if [ "${1:-}" = "--check" ]; then
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check=1
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shift
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fi
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if ! command -v emacs >/dev/null 2>&1; then
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echo "reindent: emacs not found; cannot verify or apply the canonical style" >&2
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exit 2
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fi
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if [ ! -f "$elisp" ]; then
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echo "reindent: missing $elisp" >&2
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exit 2
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fi
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# Build the file list: explicit arguments, or every tracked C source in scope.
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if [ "$#" -gt 0 ]; then
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files=$(for f in "$@"; do printf '%s\n' "$f"; done)
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else
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files=$(cd "$root" && git ls-files $SCOPE | grep -E '\.[ch]$' || true)
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fi
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# Drop generated files and anything that no longer exists on disk.
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files=$(printf '%s\n' "$files" | grep -v -x -F "$GENERATED" || true)
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files=$(cd "$root" && for f in $files; do [ -f "$f" ] && printf '%s\n' "$f"; done)
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if [ -z "$files" ]; then
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exit 0
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fi
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if [ "$check" -eq 0 ]; then
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# Reindent in place. A non-zero status here is a real failure -- never
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# swallow it, or a broken Emacs would look like "everything already conforms".
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# shellcheck disable=SC2086
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(cd "$root" && emacs --batch -Q -l "$elisp" -- $files) || {
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echo "reindent: emacs failed; no files were reindented" >&2
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exit 2
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}
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exit 0
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fi
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# --check: reindent throwaway copies and report which originals differ. The
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# copies keep their extension so cc-mode still selects the right major mode.
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tmp=$(mktemp -d)
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trap 'rm -rf "$tmp"' EXIT INT TERM
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copies=''
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for f in $files; do
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dest="$tmp/$(printf '%s' "$f" | tr '/' '_')"
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cp "$root/$f" "$dest"
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copies="$copies $dest"
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done
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# shellcheck disable=SC2086
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emacs --batch -Q -l "$elisp" -- $copies >/dev/null || {
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echo "reindent: emacs failed; cannot determine whether sources conform" >&2
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exit 2
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}
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status=0
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for f in $files; do
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dest="$tmp/$(printf '%s' "$f" | tr '/' '_')"
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if ! cmp -s "$root/$f" "$dest"; then
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echo "$f"
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status=1
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fi
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done
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exit $status
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