每轮只推进合理适量的上下文、禁止顺手扩功能 smoke：源码链接构建约束

check-linuxcnc-inputs-cached.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+cache_dir=${CNC_SIM_PREFLIGHT_CACHE_DIR:-}
+check_args=("$@")
+if [[ "${1:-}" == "--cache-dir" ]]; then
+    if [[ "$#" -lt 2 ]]; then
+        echo "missing --cache-dir value" >&2
+        exit 1
+    fi
+    cache_dir=$2
+    shift 2
+    check_args=("$@")
+fi
+
+manifest=${1:-}
+require_complete=${2:-}
+linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
+
+if [[ -z "$cache_dir" ]]; then
+    LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh "${check_args[@]}"
+    exit 0
+fi
+if [[ "$cache_dir" =~ [[:space:]] ]]; then
+    echo "CNC_SIM_PREFLIGHT_CACHE_DIR must not contain whitespace: $cache_dir" >&2
+    exit 1
+fi
+
+mkdir -p "$cache_dir"
+cache_dir=$(cd "$cache_dir" && pwd)
+if [[ "$cache_dir" == "/" ]]; then
+    echo "CNC_SIM_PREFLIGHT_CACHE_DIR must not be the filesystem root" >&2
+    exit 1
+fi
+exec 8>"$cache_dir/check-linuxcnc-inputs.lock"
+flock 8
+
+if [[ ! -d "$linuxcnc_root" ]]; then
+    LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh "${check_args[@]}"
+    exit 0
+fi
+linuxcnc_root=$(cd "$linuxcnc_root" && pwd)
+
+manifest_key=ROOT_ONLY
+manifest_path=
+if [[ -n "$manifest" && "$manifest" != "--root-only" ]]; then
+    if [[ ! -f "$manifest" ]]; then
+        LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh "${check_args[@]}"
+        exit 0
+    fi
+    manifest_path=$(cd "$(dirname "$manifest")" && pwd)/$(basename "$manifest")
+    manifest_key=$(printf '%s' "$manifest_path" | sha256sum | awk '{ print $1 }')
+fi
+
+safe_require=${require_complete:-none}
+safe_require=${safe_require//[^A-Za-z0-9_.-]/_}
+args_key=$(
+    {
+        printf 'ARGS='
+        printf ' %q' "${check_args[@]}"
+        printf '\n'
+    } | sha256sum | awk '{ print $1 }'
+)
+cache_file="$cache_dir/check-linuxcnc-inputs.${manifest_key}.${safe_require}.${args_key}.signature"
+next_signature=$(mktemp "$cache_file.next.XXXXXX")
+
+write_source_stat_signature() {
+    local source_path
+    [[ -z "$manifest_path" ]] && return 0
+    while IFS=: read -r group path note extra; do
+        case "$group" in
+            ""|\#*)
+                continue
+                ;;
+        esac
+        [[ -z "${path:-}" ]] && continue
+        source_path="$linuxcnc_root/$path"
+        if [[ ! -f "$source_path" ]]; then
+            return 1
+        fi
+        stat -c 'SOURCE=%n:%s:%y' "$source_path"
+    done < "$manifest_path"
+}
+
+write_complete_mode_signature() {
+    case "$require_complete" in
+        --require-rs274-complete)
+            find "$linuxcnc_root/src/emc/rs274ngc" -maxdepth 1 -type f \
+                -printf 'RS274=%P:%s:%T@\n' | sort
+            ;;
+        --require-kinematics-complete)
+            for source_dir in \
+                "$linuxcnc_root/src/emc/kinematics" \
+                "$linuxcnc_root/src/libnml/posemath" \
+                "$linuxcnc_root/configs/sim"; do
+                [[ -d "$source_dir" ]] || return 1
+                find "$source_dir" -type f -printf "KIN=$source_dir/%P:%s:%T@\n" | sort
+            done
+            ;;
+    esac
+}
+
+if ! {
+    printf 'CHECK_SCRIPT='
+    sha256sum check-linuxcnc-inputs.sh
+    printf 'LINUXCNC_ROOT=%s\n' "$linuxcnc_root"
+    printf 'ARGS='
+    printf ' %q' "${check_args[@]}"
+    printf '\n'
+    if [[ -n "$manifest_path" ]]; then
+        printf 'MANIFEST_PATH=%s\n' "$manifest_path"
+        printf 'MANIFEST='
+        sha256sum "$manifest_path"
+        write_source_stat_signature
+    fi
+    write_complete_mode_signature
+} > "$next_signature"; then
+    rm -f "$next_signature"
+    LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh "${check_args[@]}"
+    exit 0
+fi
+
+if [[ -f "$cache_file" ]] && cmp -s "$cache_file" "$next_signature"; then
+    rm -f "$next_signature"
+    exit 0
+fi
+
+LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs.sh "${check_args[@]}"
+mv "$next_signature" "$cache_file"