Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.
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Scripts/node_modules/tar-fs/README.md
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# tar-fs
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Filesystem bindings for [tar-stream](https://github.com/mafintosh/tar-stream).
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```
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npm install tar-fs
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```
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## Usage
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tar-fs allows you to pack directories into tarballs and extract tarballs into directories.
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It doesn't gunzip for you, so if you want to extract a `.tar.gz` with this you'll need to use something like [gunzip-maybe](https://github.com/mafintosh/gunzip-maybe) in addition to this.
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``` js
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const tar = require('tar-fs')
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const fs = require('fs')
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// packing a directory
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tar.pack('./my-directory').pipe(fs.createWriteStream('my-tarball.tar'))
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// extracting a directory
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fs.createReadStream('my-other-tarball.tar').pipe(tar.extract('./my-other-directory'))
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```
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To ignore various files when packing or extracting add a ignore function to the options. `ignore`
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is also an alias for `filter`. Additionally you get `header` if you use ignore while extracting.
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That way you could also filter by metadata.
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``` js
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const pack = tar.pack('./my-directory', {
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ignore (name) {
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return path.extname(name) === '.bin' // ignore .bin files when packing
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}
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})
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const extract = tar.extract('./my-other-directory', {
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ignore (name) {
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return path.extname(name) === '.bin' // ignore .bin files inside the tarball when extracing
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}
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})
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const extractFilesDirs = tar.extract('./my-other-other-directory', {
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ignore (_, header) {
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// pass files & directories, ignore e.g. symlinks
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return header.type !== 'file' && header.type !== 'directory'
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}
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})
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```
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You can also specify which entries to pack using the `entries` option
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```js
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const pack = tar.pack('./my-directory', {
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entries: ['file1', 'subdir/file2'] // only the specific entries will be packed
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})
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```
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If you want to modify the headers when packing/extracting add a map function to the options
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``` js
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const pack = tar.pack('./my-directory', {
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map (header) {
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header.name = 'prefixed/'+header.name
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return header
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}
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})
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const extract = tar.extract('./my-directory', {
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map (header) {
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header.name = 'another-prefix/'+header.name
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return header
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}
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})
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```
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Similarly you can use `mapStream` incase you wanna modify the input/output file streams
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``` js
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const pack = tar.pack('./my-directory', {
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mapStream (fileStream, header) {
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// NOTE: the returned stream HAS to have the same length as the input stream.
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// If not make sure to update the size in the header passed in here.
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if (path.extname(header.name) === '.js') {
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return fileStream.pipe(someTransform)
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}
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return fileStream
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}
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})
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const extract = tar.extract('./my-directory', {
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mapStream (fileStream, header) {
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if (path.extname(header.name) === '.js') {
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return fileStream.pipe(someTransform)
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}
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return fileStream
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}
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})
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```
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Set `options.fmode` and `options.dmode` to ensure that files/directories extracted have the corresponding modes
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``` js
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const extract = tar.extract('./my-directory', {
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dmode: parseInt(555, 8), // all dirs should be readable
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fmode: parseInt(444, 8) // all files should be readable
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})
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```
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It can be useful to use `dmode` and `fmode` if you are packing/unpacking tarballs between *nix/windows to ensure that all files/directories unpacked are readable.
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Alternatively you can set `options.readable` and/or `options.writable` to set the dmode and fmode to readable/writable.
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``` js
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var extract = tar.extract('./my-directory', {
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readable: true, // all dirs and files should be readable
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writable: true, // all dirs and files should be writable
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})
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```
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Set `options.strict` to `false` if you want to ignore errors due to unsupported entry types (like device files)
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To dereference symlinks (pack the contents of the symlink instead of the link itself) set `options.dereference` to `true`.
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## Copy a directory
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Copying a directory with permissions and mtime intact is as simple as
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``` js
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tar.pack('source-directory').pipe(tar.extract('dest-directory'))
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```
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## Interaction with [`tar-stream`](https://github.com/mafintosh/tar-stream)
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Use `finalize: false` and the `finish` hook to
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leave the pack stream open for further entries (see
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[`tar-stream#pack`](https://github.com/mafintosh/tar-stream#packing)),
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and use `pack` to pass an existing pack stream.
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``` js
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const mypack = tar.pack('./my-directory', {
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finalize: false,
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finish (sameAsMypack) {
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mypack.entry({name: 'generated-file.txt'}, "hello")
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tar.pack('./other-directory', {
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pack: sameAsMypack
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})
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}
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})
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```
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## License
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MIT
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