Node JS directory compare
$ npm install dir-compare
orshell $ npm install -g dir-compare
for command line utility.
const dircompare = require('dir-compare');
const options = { compareSize: true };
// Multiple compare strategy can be used simultaneously - compareSize, compareContent, compareDate, compareSymlink.
// If one comparison fails for a pair of files, they are considered distinct.
const path1 = '...';
const path2 = '...';
// Synchronous
const res = dircompare.compareSync(path1, path2, options)
print(res)
// Asynchronous
dircompare.compare(path1, path2, options)
.then(res => print(res))
.catch(error => console.error(error));
function print(result) {
console.log('Directories are %s', result.same ? 'identical' : 'different')
console.log('Statistics - equal entries: %s, distinct entries: %s, left only entries: %s, right only entries: %s, differences: %s',
result.equal, result.distinct, result.left, result.right, result.differences)
result.diffSet.forEach(dif => console.log('Difference - name1: %s, type1: %s, name2: %s, type2: %s, state: %s',
dif.name1, dif.type1, dif.name2, dif.type2, dif.state))
}
Typescript
```typescript
import { compare, compareSync, Options, Result } from "dir-compare";
const path1 = '...';
const path2 = '...';
const options: Options = { compareSize: true };
const res: Result = compareSync(path1, path2, options);
console.log(res)
compare(path1, path2, options)
.then(res => console.log(res))
.catch(error => console.error(error));
```
Below is a quick recap of the api. For more details check the reference documentation.typescript compare(path1: string, path2: string, options?: Options): Promise<Result> compareSync(path1: string, path2: string, options?: Options): Result
* **compareSize**: true/false - Compares files by size. Defaults to 'false'.
* **compareContent**: true/false - Compares files by content. Defaults to 'false'.
* **compareFileSync**, **compareFileAsync**: Callbacks for file comparison. See [Custom file content comparators](#custom-file-content-comparators).
* **compareDate**: true/false - Compares files by date of modification (stat.mtime). Defaults to 'false'.
* **compareNameHandler**: Callback for name comparison. See [Custom name comparators](#custom-name-comparators).
* **dateTolerance**: milliseconds - Two files are considered to have the same date if the difference between their modification dates fits within date tolerance. Defaults to 1000 ms.
* **compareSymlink**: true/false - Compares entries by symlink. Defaults to 'false'.
* **skipSymlinks**: true/false - Ignore symbolic links. Defaults to 'false'.
* **skipSubdirs**: true/false - Skips sub directories. Defaults to 'false'.
* **ignoreCase**: true/false - Ignores case when comparing names. Defaults to 'false'.
* **noDiffSet**: true/false - Toggles presence of diffSet in output. If true, only statistics are provided. Use this when comparing large number of files to avoid out of memory situations. Defaults to 'false'.
* **includeFilter**: File name filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns. See [Glob patterns](#glob-patterns) below.
* **excludeFilter**: File/directory name exclude filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns. See [Glob patterns](#glob-patterns) below.
* **resultBuilder**: Callback for constructing result. Called for each compared entry pair. Updates `statistics` and `diffSet`. More details in [Custom result builder](#custom-result-builder).
compareSymlink options is used
options.noDiffSet is false)
Minimatch patterns are used to include/exclude files to be compared.
The pattern is matched against the relative path of the entry being compared.
Following examples assume we are comparing two dir-compare code bases.
dircompare -x ".git,node_modules" dir1 dir2') exclude git and node modules directories
dircompare -x "expected" dir1 dir2') exclude '/tests/expected' directory
dircompare -x "/tests/expected" dir1 dir2') exclude '/tests/expected' directory
dircompare -x "**/expected" dir1 dir2') exclude '/tests/expected' directory
dircompare -x "**/tests/**/*.js" dir1 dir2') exclude all js files in '/tests' directory and subdirectories
dircompare -f "*.js,*.yml" dir1 dir2') include js and yaml files
dircompare -f "/tests/**/*.js" dir1 dir2') include all js files in '/tests' directory and subdirectories
dircompare -f "**/tests/**/*.ts" dir1 dir2') include all js files in '/tests' directory and subdirectories
By default file content is binary compared. As of version 1.5.0 custom file comparison handlers may be specified.
Custom handlers are specified by compareFileSync and compareFileAsync options which correspond to dircompare.compareSync() or dircompare.compare() methods.
A couple of handlers are included in the library:
* binary sync compare - dircompare.fileCompareHandlers.defaultFileCompare.compareSync
* binary async compare - dircompare.fileCompareHandlers.defaultFileCompare.compareAsync
* text sync compare - dircompare.fileCompareHandlers.lineBasedFileCompare.compareSync
* text async compare - dircompare.fileCompareHandlers.lineBasedFileCompare.compareAsync
Use defaultFileCompare.js as an example to create your own.
Line based comparator can be used to ignore line ending and white space differences. This comparator is not available in CLI mode.
```javascript
var dircompare = require('dir-compare');
var options = {
compareContent: true,
compareFileSync: dircompare.fileCompareHandlers.lineBasedFileCompare.compareSync,
compareFileAsync: dircompare.fileCompareHandlers.lineBasedFileCompare.compareAsync,
ignoreLineEnding: true,
ignoreWhiteSpaces: true
};
var path1 = '...';
var path2 = '...';
var res = dircompare.compareSync(path1, path2, options);
console.log(res)
dircompare.compare(path1, path2, options)
.then(res => console.log(res)) ## Custom name comparators If [default](https://github.com/gliviu/dir-compare/blob/master/src/nameCompare/defaultNameCompare.js) name comparison is not enough, custom behavior can be specified with [compareNameHandler](https://gliviu.github.io/dc-api/index.html#comparenamehandler) option. Following example adds the possibility to ignore file extensions. typescript
import { Options, compare } from 'dir-compare'
import path from 'path'
var options: Options = {
compareSize: false, // compare only name by disabling size and content criteria
compareContent: false,
compareNameHandler: customNameCompare, // new name comparator used to ignore extensions
ignoreExtension: true, // supported by the custom name compare below
};
function customNameCompare(name1: string, name2: string, options: Options) {
if (options.ignoreCase) {
name1 = name1.toLowerCase()
name2 = name2.toLowerCase()
}
if (options.ignoreExtension) {
name1 = path.basename(name1, path.extname(name1))
name2 = path.basename(name2, path.extname(name2))
}
return ((name1 === name2) ? 0 : ((name1 > name2) ? 1 : -1))
}
var path1 = '/tmp/a';
var path2 = '/tmp/b';
var res = compare(path1, path2, options).then(res => {
console.log(Same: ${res.same})
if (!res.diffSet) {
return
}
res.diffSet.forEach(dif => console.log(${dif.name1} ${dif.name2} ${dif.state}))
})
// Outputs
// icon.svg icon.png equal
// logo.svg logo.jpg equal
```
Result builder is called for each pair of entries encountered during comparison. Its purpose is to append entries in diffSet and eventually update statistics object with new stats.
If needed it can be replaced with custom implementation.
var dircompare = require("dircompare")
var customResultBuilder = function (entry1, entry2, state, level, relativePath, options, statistics, diffSet, reason) {
...
}
var options = {
compareSize: true,
resultBuilder: customResultBuilder
}
var res = dircompare.compareSync('...', '...', options)
The default builder can be used as an example.
Unless compareSymlink option is used, symbolic links are resolved and any comparison is applied to the file/directory they point to.
Circular loops are handled by breaking the loop as soon as it is detected.
Version 1.x treats broken links as ENOENT: no such file or directory.
Since 2.0 they are treated as a special type of entry - broken-link - and are available as stats (totalBrokenLinks, distinctBrokenLinks, ...).
Using compareSymlink option causes dircompare to check symlink values for equality.
In this mode two entries with identical name are considered different if
* one is symlink, the other is not
* both are symlinks but point to different locations
These rules are applied in addition to the other comparison modes; ie. by content, by size...
If entries are different because of symlinks, reason will be different-symlink. Also statistics summarizes differences caused by symbolik links.
Usage: dircompare [options] leftdir rightdir
Options:
-h, --help output usage information
-V, --version output the version number
-c, --compare-content compare files by content
-D, --compare-date compare files by date
--date-tolerance [type] tolerance to be used in date comparison (milliseconds)
--compare-symlink compare files and directories by symlink
-f, --filter [type] file name filter
-x, --exclude [type] file/directory name exclude filter
-S, --skip-subdirs do not recurse into subdirectories
-L, --skip-symlinks ignore symlinks
-i, --ignore-case ignores case when comparing file names
-l, --show-left report - show entries occurring in left dir
-r, --show-right report - show entries occurring in right dir
-e, --show-equal report - show identic entries occurring in both dirs
-d, --show-distinct report - show distinct entries occurring in both dirs
-a, --show-all report - show all entries
-w, --whole-report report - include directories in detailed report
--reason report - show reason when entries are distinct
--csv report - print details as csv
--nocolors don't use console colors
--async Make use of multiple cores
By default files are compared by size.
--date-tolerance defaults to 1000 ms. Two files are considered to have
the same date if the difference between their modification dates fits
within date tolerance.
Exit codes:
0 - entries are identical
1 - entries are different
2 - error occurred
Examples:
compare by content dircompare -c dir1 dir2
show only different files dircompare -d dir1 dir2
exclude filter dircompare -x ".git,node_modules" dir1 dir2
dircompare -x "/tests/expected" dir1 dir2
dircompare -x "**/expected" dir1 dir2
dircompare -x "**/tests/**/*.ts" dir1 dir2
include filter dircompare -f "*.js,*.yml" dir1 dir2
dircompare -f "/tests/**/*.js" dir1 dir2
dircompare -f "**/tests/**/*.ts" dir1 dir2
Breaking changes:
* Broken links are no longer treated as errors. As a result there are new statistics (leftBrokenLinks, rightBrokenLinks, distinctBrokenLinks, totalBrokenLinks) and new entry type - broken-link.
Details in Symbolic links.
* Typescript correction: new interface Result replaced Statistics.
* v1.8.0
* globstar patterns
* typescript corrections
* removed support for node 0.11, 0.12, iojs
* v1.7.0 performance improvements
* v1.6.0 typescript support
* v1.5.0 added option to ignore line endings and white space differences
* v1.3.0 added date tolerance option
* v1.2.0 added compare by date option
* v1.1.0
* detect symlink loops
* improved color scheme for command line utility
* v1.0.0
* asynchronous processing
* new library options: noDiffSet, resultBuilder
* new statistics: distinctFiles, equalFiles, leftFiles, rightFiles, distinctDirs, equalDirs, leftDirs, rightDirs
* new --async command line option
* Fix for https://github.com/tj/commander.js/issues/125
* v0.0.3 Fix fille ordering issue for newer node versions