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#!/usr/bin/env bash
set -uo pipefail
# @describe Apply a patch to a file at the specified path.
# @option --path! The path of the file to apply to
# @option --contents! The patch to apply to the file
# @env LLM_OUTPUT=/dev/stdout The output path
ROOT_DIR="${LLM_ROOT_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"
OUT="${LLM_OUTPUT:-/dev/stdout}"
err() {
echo "ERROR: $*" >> "$OUT"
exit 0
}
main() {
path="${argc_path:-}"
patch="${argc_contents:-}"
[[ -z "$path" ]] && err "missing --path"
[[ -z "$patch" ]] && err "missing --contents"
[[ ! -e "$path" ]] && err "file not found: $path"
[[ ! -f "$path" ]] && err "not a regular file: $path"
[[ ! -r "$path" ]] && err "file not readable: $path"
new_contents=""
if ! new_contents="$(awk -f "$ROOT_DIR/utils/patch.awk" "$path" <(printf "%s" "$patch") 2>/tmp/fs_patch.err)"; then
msg="$(cat /tmp/fs_patch.err 2>/dev/null || true)"
err "patch apply failed for $path: ${msg:-unknown error}"
fi
# Diff in Tool-Output schreiben (damit das LLM es sieht)
printf "%s" "$new_contents" | git diff --no-index "$path" - >> "$OUT" 2>/dev/null || true
# Guard kann “abbrechen” -> als ERROR ausgeben, aber exit 0
if ! "$ROOT_DIR/utils/guard_operation.sh" "Apply changes?" >>"$OUT" 2>&1; then
err "operation cancelled by user"
fi
if ! printf "%s" "$new_contents" > "$path" 2>/tmp/fs_patch_write.err; then
msg="$(cat /tmp/fs_patch_write.err 2>/dev/null || true)"
err "failed to write patched file $path: ${msg:-unknown error}"
fi
echo "The patch applied to: $path" >> "$OUT"
exit 0
}
eval "$(argc --argc-eval "$0" "$@")"
main
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