blocks|key|4631289|text|如果你想这样做，你可以创建一个“假的”黑胶文件流，并像往常一样调用pipe。下面是一个用于创建流的函数。"stream“是一个核心模块，所以你不需要安装任何东西：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4631290|const+Vinyl+=+require('vinyl')

function+string_src(filename,+string)+{
++var+src+=+require('stream').Readable({+objectMode:+true+})
++src._read+=+function+()+{
++++this.push(new+Vinyl({
++++++cwd:+"",
++++++base:+"",
++++++path:+filename,
++++++contents:+Buffer.from(string,+'utf-8')
++++}))
++++this.push(null)
++}
++return+src
}|code-block|syntax|javascript|4631291|你可以这样使用它：|4631292|gulp.task('version',+function+()+{
++var+pkg+=+require('package.json')
++return+string_src("version",+pkg.version)
++++.pipe(gulp.dest('build/'))
})|4631293|entityMap^0|X|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

If you'd like to do this in a gulp-like way, you can create a stream of &quot;fake&quot; vinyl files and call <code>pipe</code> per usual. Here's a function for creating the stream. &quot;stream&quot; is a core module, so you don't need to install anything:
<pre><code>const Vinyl = require('vinyl')

function string_src(filename, string) {
 var src = require('stream').Readable({ objectMode: true })
 src._read = function () {
 this.push(new Vinyl({
 cwd: &quot;&quot;,
 base: &quot;&quot;,
 path: filename,
 contents: Buffer.from(string, 'utf-8')
 }))
 this.push(null)
 }
 return src
}
</code></pre>
You can use it like this:
<pre><code>gulp.task('version', function () {
 var pkg = require('package.json')
 return string_src(&quot;version&quot;, pkg.version)
 .pipe(gulp.dest('build/'))
})
</code></pre>

blocks|key|4631467|text|这也可以使用vinyl-source-stream来完成。请参阅gulp存储库中的this+document。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4631468|var+gulp+=+require('gulp'),
++++source+=+require('vinyl-source-stream');

gulp.task('some-task',+function()+{
++++var+stream+=+source('file.txt');

++++stream.end('some+data');
++++stream.pipe(gulp.dest('output'));
});|code-block|syntax|javascript|4631469|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/vinyl-source-stream|1|https://github.com/gulpjs/gulp/blob/master/docs/recipes/make-stream-from-buffer.md^0|6|J|0|15|D|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

This can also be done with <a href="https://www.npmjs.com/package/vinyl-source-stream" rel="noreferrer">vinyl-source-stream</a>. See <a href="https://github.com/gulpjs/gulp/blob/master/docs/recipes/make-stream-from-buffer.md" rel="noreferrer">this document</a> in the gulp repository.

<pre><code>var gulp = require('gulp'),
 source = require('vinyl-source-stream');

gulp.task('some-task', function() {
 var stream = source('file.txt');

 stream.end('some data');
 stream.pipe(gulp.dest('output'));
});
</code></pre>

blocks|key|125450|text|据Gulp的维护者介绍，将字符串写入文件的首选方式是使用带有任务回调的fs.writeFile。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|125451|var+fs+=+require('fs');
var+gulp+=+require('gulp');

gulp.task('taskname',+function(cb){
++fs.writeFile('filename.txt',+'contents',+cb);
});|code-block|syntax|javascript|125452|来源：https://github.com/gulpjs/gulp/issues/332#issuecomment-36970935|125453|entityMap|0|LINK|mutability|MUTABLE|url|https://nodejs.org/api/fs.html#fs_fs_writefile_file_data_options_callback|1|https://github.com/gulpjs/gulp/issues/332#issuecomment-36970935^0|Z|C|Z|C|0|0|0|3|1R|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|M|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]]]

According to the maintainer of Gulp, the preferred way to write a string to a file is using <a href="https://nodejs.org/api/fs.html#fs_fs_writefile_file_data_options_callback" rel="noreferrer"><code>fs.writeFile</code></a> with the task callback.

<pre><code>var fs = require('fs');
var gulp = require('gulp');

gulp.task('taskname', function(cb){
 fs.writeFile('filename.txt', 'contents', cb);
});
</code></pre>

Source: <a href="https://github.com/gulpjs/gulp/issues/332#issuecomment-36970935" rel="noreferrer">https://github.com/gulpjs/gulp/issues/332#issuecomment-36970935</a>

blocks|key|125377|text|您也可以使用gulp-file|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|125378|var+gulp+=+require('gulp');
var+file+=+require('gulp-file');

gulp.task('version',+function+()+{
++++var+pkg+=+require('package.json')

++++return+gulp.src('src/**')
++++++++.pipe(file('version',+pkg.version))
++++++++.pipe(gulp.dest('build/'))
});|code-block|syntax|javascript|125379|或者不使用gulp.src()|style|CODE|125380|gulp.task('version',+function+()+{
++++var+pkg+=+require('package.json')

++++return+file('version',+pkg.version,+{src:+true})
++++++++.pipe(gulp.dest('build/'))
});|125381|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/gulp-file^0|6|9|0|0|0|5|A|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

You can also use <a href="https://www.npmjs.com/package/gulp-file">gulp-file</a>:

<pre><code>var gulp = require('gulp');
var file = require('gulp-file');

gulp.task('version', function () {
 var pkg = require('package.json')

 return gulp.src('src/**')
 .pipe(file('version', pkg.version))
 .pipe(gulp.dest('build/'))
});
</code></pre>

or without using <code>gulp.src()</code>:

<pre><code>gulp.task('version', function () {
 var pkg = require('package.json')

 return file('version', pkg.version, {src: true})
 .pipe(gulp.dest('build/'))
});
</code></pre>

blocks|key|125259|text|gulp-header包可用于为文件添加标题横幅前缀。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|125260|例如：这将在您的javascript文件的头中插入一个横幅。|125261|var+header+=+require('gulp-header');
var+pkg+=+require('./package.json');
var+banner+=+['/**',
++'+*+<%25=+pkg.name+%25>+-+<%25=+pkg.description+%25>',
++'+*+@version+v<%25=+pkg.version+%25>',
++'+*+@link+<%25=+pkg.homepage+%25>',
++'+*+@license+<%25=+pkg.license+%25>',
++'+*/',
++''].join('\n');

gulp.src('./foo/*.js')
++.pipe(header(banner,+{+pkg:+pkg+}+))
++.pipe(gulp.dest('./dist/')|code-block|syntax|javascript|125262|Gulp是一个利用管道的流式构建系统。|125263|如果你只是想写一个带有任意字符串的新文件，你可以使用内置node+fs对象。|125264|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/godaddy/gulp-header|1|http://nodejs.org/api/fs.html^0|0|B|0|0|0|0|0|S|7|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|C|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

The <a href="https://github.com/godaddy/gulp-header" rel="noreferrer">gulp-header</a> package can be used to prefix files with header banners.

eg. This will inject a banner into the header of your javascript files.

<pre><code>var header = require('gulp-header');
var pkg = require('./package.json');
var banner = ['/**',
 ' * &lt;%= pkg.name %&gt; - &lt;%= pkg.description %&gt;',
 ' * @version v&lt;%= pkg.version %&gt;',
 ' * @link &lt;%= pkg.homepage %&gt;',
 ' * @license &lt;%= pkg.license %&gt;',
 ' */',
 ''].join('\n');

gulp.src('./foo/*.js')
 .pipe(header(banner, { pkg: pkg } ))
 .pipe(gulp.dest('./dist/')
</code></pre>

Gulp is a streaming build system leveraging pipes.

If you simply want to write a new file with an arbitrary string, you can use built in <a href="http://nodejs.org/api/fs.html" rel="noreferrer">node fs</a> object.

blocks|key|125423|text|使用string-to-stream和vinyl-source-stream模块：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|125424|var+str+=+require('string-to-stream');
var+source+=+require('vinyl-source-stream');
var+gulp+=+require('gulp');

str('1.4.27').pipe(source('version.txt')).pipe(gulp.dest('dist'));|code-block|syntax|javascript|125425|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/string-to-stream|1|https://www.npmjs.com/package/vinyl-source-stream^0|2|G|0|J|J|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

Using the <a href="https://www.npmjs.com/package/string-to-stream" rel="nofollow">string-to-stream</a> and <a href="https://www.npmjs.com/package/vinyl-source-stream" rel="nofollow">vinyl-source-stream</a> modules:

<pre><code>var str = require('string-to-stream');
var source = require('vinyl-source-stream');
var gulp = require('gulp');

str('1.4.27').pipe(source('version.txt')).pipe(gulp.dest('dist'));
</code></pre>

blocks|key|4631411|text|这也可以使用gulp-tap来实现|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4631412|如果您标识了多个需要此标头的文件，这会特别有用。以下是相关代码(也来自gulp-tap文档)|4631413|var+gulp+=+require('gulp'),
++++tap+=+require('gulp-tap');

gulp.src("src/**")
++++.pipe(tap(function(file){
+++++++++++file.contents+=+Buffer.concat([
+++++++++++++new+Buffer('Some+Version+Header',+'utf8'),
+++++++++++++file.contents
+++++++++++]);
+++++++++}))
++++.pipe(gulp.dest('dist');|code-block|syntax|javascript|4631414|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/gulp-tap^0|6|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

This can also be achieved using <a href="https://www.npmjs.com/package/gulp-tap" rel="nofollow">gulp-tap</a>

This can be especially helpful if you have identified multiple files that require this header. Here is relevant code (Also from gulp-tap documentation)

<pre><code>var gulp = require('gulp'),
 tap = require('gulp-tap');

gulp.src("src/**")
 .pipe(tap(function(file){
 file.contents = Buffer.concat([
 new Buffer('Some Version Header', 'utf8'),
 file.contents
 ]);
 }))
 .pipe(gulp.dest('dist');
</code></pre>

In my gulpfile I have a version number in a string. I'd like to write the version number to a file. Is there a nice way to do this in Gulp, or should I be looking at more general NodeJS APIs?

How do you create a file from a string in Gulp?

在我的gulpfile中，我有一个字符串形式的版本号。我想把版本号写到一个文件里。在Gulp中有没有很好的方法来做到这一点，或者我应该考虑更通用的NodeJS API？

问如何从Gulp中的字符串创建文件？
EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何从Gulp中的字符串创建文件？EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何从Gulp中的字符串创建文件？
EN