import fs from "node:fs/promises" ;
import path from "node:path" ;
import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime" ;
export const DEFAULT_OPEN_SHELL_MIRROR_EXCLUDE_DIRS = ["hooks" , "git-hooks" , ".git" ] as const ;
const COPY_TREE_FS_CONCURRENCY = 16 ;
function createExcludeMatcher(excludeDirs?: readonly string[]) {
const excluded = new Set((excludeDirs ?? []).map((d) => normalizeLowercaseStringOrEmpty(d)));
return (name: string) => excluded.has(normalizeLowercaseStringOrEmpty(name));
}
function createConcurrencyLimiter(limit: number) {
let active = 0 ;
const queue: Array<() => void > = [];
const release = () => {
active -= 1 ;
queue.shift()?.();
};
return async <T>(task: () => Promise<T>): Promise<T> => {
if (active >= limit) {
await new Promise<void >((resolve) => {
queue.push(resolve);
});
}
active += 1 ;
try {
return await task();
} finally {
release();
}
};
}
const runLimitedFs = createConcurrencyLimiter(COPY_TREE_FS_CONCURRENCY);
async function lstatIfExists(targetPath: string) {
return await runLimitedFs(async () => await fs.lstat(targetPath)).catch (() => null );
}
async function copyTreeWithoutSymlinks(params: {
sourcePath: string;
targetPath: string;
preserveTargetSymlinks?: boolean ;
}): Promise<void > {
const stats = await runLimitedFs(async () => await fs.lstat(params.sourcePath));
// Mirror sync only carries regular files and directories across the
// host/sandbox boundary. Symlinks and special files are dropped.
if (stats.isSymbolicLink()) {
return ;
}
const targetStats = await lstatIfExists(params.targetPath);
if (params.preserveTargetSymlinks && targetStats?.isSymbolicLink()) {
return ;
}
if (stats.isDirectory()) {
await runLimitedFs(async () => await fs.mkdir(params.targetPath, { recursive: true }));
const entries = await runLimitedFs(async () => await fs.readdir(params.sourcePath));
await Promise.all(
entries.map(async (entry) => {
await copyTreeWithoutSymlinks({
sourcePath: path.join(params.sourcePath, entry),
targetPath: path.join(params.targetPath, entry),
preserveTargetSymlinks: params.preserveTargetSymlinks,
});
}),
);
return ;
}
if (stats.isFile()) {
await runLimitedFs(
async () => await fs.mkdir(path.dirname(params.targetPath), { recursive: true }),
);
await runLimitedFs(async () => await fs.copyFile(params.sourcePath, params.targetPath));
}
}
export async function replaceDirectoryContents(params: {
sourceDir: string;
targetDir: string;
/** Top-level directory names to exclude from sync (preserved in target, skipped from source). */
excludeDirs?: readonly string[];
}): Promise<void > {
const isExcluded = createExcludeMatcher(params.excludeDirs);
await fs.mkdir(params.targetDir, { recursive: true });
const existing = await fs.readdir(params.targetDir);
await Promise.all(
existing
.filter((entry) => !isExcluded(entry))
.map(async (entry) => {
const targetPath = path.join(params.targetDir, entry);
const stats = await lstatIfExists(targetPath);
if (stats?.isSymbolicLink()) {
return ;
}
await runLimitedFs(
async () =>
await fs.rm(targetPath, {
recursive: true ,
force: true ,
}),
);
}),
);
const sourceEntries = await fs.readdir(params.sourceDir);
for (const entry of sourceEntries) {
if (isExcluded(entry)) {
continue ;
}
await copyTreeWithoutSymlinks({
sourcePath: path.join(params.sourceDir, entry),
targetPath: path.join(params.targetDir, entry),
preserveTargetSymlinks: true ,
});
}
}
export async function stageDirectoryContents(params: {
sourceDir: string;
targetDir: string;
/** Top-level directory names to exclude from the staged upload. */
excludeDirs?: readonly string[];
}): Promise<void > {
const isExcluded = createExcludeMatcher(params.excludeDirs);
await fs.mkdir(params.targetDir, { recursive: true });
const sourceEntries = await fs.readdir(params.sourceDir);
for (const entry of sourceEntries) {
if (isExcluded(entry)) {
continue ;
}
await copyTreeWithoutSymlinks({
sourcePath: path.join(params.sourceDir, entry),
targetPath: path.join(params.targetDir, entry),
});
}
}
export async function movePathWithCopyFallback(params: {
from: string;
to: string;
}): Promise<void > {
try {
await fs.rename(params.from, params.to);
return ;
} catch (error) {
const code = (error as NodeJS.ErrnoException | null )?.code;
if (code !== "EXDEV" ) {
throw error;
}
}
await fs.cp(params.from, params.to, {
recursive: true ,
force: true ,
dereference: false ,
});
await fs.rm(params.from, { recursive: true , force: true });
}
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