gulp-hashsum: Generate checksum files with Gulp

A Gulp plugin for generating a checksum file with the hash checksums of the passed files. The file follows the same format as shasum, sha1sum, md5sum, and similar tools.

Since it only writes the file when the checksums have changed, can also be used as a timestamp.

Installation

npm install gulp-hashsum --save-dev

Usage

Generate a hash file

The following generates a file app/SHA1SUMS with all the SHA-1 checksums of all the .js files in the app directory.

var hashsum = require("gulp-hashsum");

gulp.src(["app/**/*.js"]).
    pipe(hashsum({dest: "app"}));

The contents of the SHA1SUMS file will look like this:

	3ff1f9baca7bf41fe4a12222436025c036ba88bf  main.js
	14de86e007f14bc0c6bc9a84d21cb9da908495ae  submodule/sub.js

Use a different hash than SHA-1

The following generates a file app/MD5SUMS with all the MD5 checksums of all the .js files in the app directory.

var hashsum = require("gulp-hashsum");

gulp.src(["app/**/*.js"]).
    pipe(hashsum({dest: "app", hash: "md5"}));

Use it as a timestamp

Since gulp-hashsum only writes the hash file whenever its content changes, you can use it as a checksum file, e.g. to restart Passenger Phusion whenever a file changes, by specifying restart.txt as the filename:

var hashsum = require("gulp-hashsum");

gulp.src(["app/**/*.js"]).
    pipe(hashsum({filename: "tmp/restart.txt"}));

Stream

Instead of writing the checksum file to disk, you can stream it and pass it to pipes:

var hashsum = require("gulp-hashsum");

gulp.src(["app/**/*.js"]).
    pipe(hashsum({stream: true})).
pipe(gulp.dest("app"));

API

hashsum(options)

• options.dest - string
  The destination directory of the hash file.
  Default: process.cwd() (the current working directory)

• options.filename - string
  The filename of the hash file.
  Default: <HASH-NAME>SUMS (i.e. SHA1SUMS when sha1 is used as hash function)

• options.hash - string
  The hash function to use. Must be one supported by crypto.
  Default: sha1

• options.force - boolean
  Always overwrite the hashsum file, regardless of whether the contents changed.
  Default: false

• options.delimiter - string
  Separator between hashsum and filename. Default: `` (two spaces)

• options.json - boolean
  Format hash file as a JSON object (instead of a options.delimiter-delimited file). E.g.:

    {
      "dir1/file1": "3ff1f9baca7bf41fe4a12222436025c036ba88bf",
      "dir1/file2": "14de86e007f14bc0c6bc9a84d21cb9da908495ae"
    }

Default: false

• options.stream - boolean
  Instead of writing the file to disk, stream it (so it can be passed to later pipes)

  Default: false

Changelog

1.2.0 (2018-04-16)

• Add stream option.

1.1.0 (2016-06-16)

• Add json option.

1.0.1 (2016-01-29)

• Remove buffertools dependency

1.0.0 (2014-09-29)

• Initial release