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fs: use streaming directory processing in cp() #41351

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Merged
nodejs-github-bot merged 2 commits into from
Dec 31, 2021
Merged

fs: use streaming directory processing in cp() #41351

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b5aa0b3
fs: use async directory processing in cp()
cjihrig Dec 29, 2021
625c12f
Update lib/internal/fs/cp/cp.js
cjihrig Dec 29, 2021
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24 changes: 16 additions & 8 deletions lib/internal/fs/cp/cp-sync.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ const {
existsSync,
lstatSync,
mkdirSync,
readdirSync,
opendirSync,
readlinkSync,
statSync,
symlinkSync,
Expand Down Expand Up @@ -275,14 +275,22 @@ function mkDirAndCopy(srcMode, src, dest, opts) {
}

function copyDir(src, dest, opts) {
readdirSync(src).forEach((item) => copyDirItem(item, src, dest, opts));
}
const dir = opendirSync(src);

try {
let dirent;

function copyDirItem(item, src, dest, opts) {
const srcItem = join(src, item);
const destItem = join(dest, item);
const { destStat } = checkPathsSync(srcItem, destItem, opts);
return startCopy(destStat, srcItem, destItem, opts);
while ((dirent = dir.readSync()) !== null) {
const { name } = dirent;
const srcItem = join(src, name);
const destItem = join(dest, name);
const { destStat } = checkPathsSync(srcItem, destItem, opts);

startCopy(destStat, srcItem, destItem, opts);
}
} finally {
dir.closeSync();
}
}

function onLink(destStat, src, dest) {
Expand Down
13 changes: 7 additions & 6 deletions lib/internal/fs/cp/cp.js
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@ const {
copyFile,
lstat,
mkdir,
readdir,
opendir,
readlink,
stat,
symlink,
Expand Down Expand Up @@ -325,11 +325,12 @@ async function mkDirAndCopy(srcMode, src, dest, opts) {
}

async function copyDir(src, dest, opts) {
const dir = await readdir(src);
for (let i = 0; i < dir.length; i++) {
const item = dir[i];
const srcItem = join(src, item);
const destItem = join(dest, item);
const dir = await opendir(src);

for await (const dirent of dir) {
const { name } = dirent;
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const srcItem = join(src, name);
const destItem = join(dest, name);
const { destStat } = await checkPaths(srcItem, destItem, opts);
await startCopy(destStat, srcItem, destItem, opts);
}
Expand Down