如何在 gulp 中创建重复管道?

How to create repeating pipe in gulp?

我有一个 gulp 任务要在 index.html 中注入几个依赖项,如下所示:

return gulp.src(config.serve.html)
          .pipe($.inject(gulp.src(prependSource(config.inject.source.indexes)), {
            read: false,
            starttag: config.inject.indexes,
            addRootSlash: false,
            addPrefix: prefix,
            ignorePath: ignore
          }))
          .pipe($.inject(gulp.src(managerList), {
            read: false,
            starttag: config.inject.managers,
            addRootSlash: false,
            addPrefix: prefix,
            ignorePath: ignore
          }))
          .pipe($.inject(gulp.src(prependSource(config.inject.source.directives)), {
            read: false,
            starttag: config.inject.directives,
            addRootSlash: false,
            addPrefix: prefix,
            ignorePath: ignore
          }))

          .pipe($.inject(gulp.src(prependSource(config.inject.source.routes)), {
            read: false,
            starttag: config.inject.routes,
            addRootSlash: false,
            addPrefix: prefix,
            ignorePath: ignore
          }))
          .pipe($.inject(gulp.src(prependSource(config.inject.source.css)), {
            read: false,
            starttag: config.inject.css,
            addRootSlash: false,
            addPrefix: prefix,
            ignorePath: ignore
          }))


          .pipe($.size())
          .pipe(gulp.dest(dest));
};

如您所见,所有管道都以某种方式重复(managerList 除外)。所以我想要的是在一系列注入的帮助下将重复的管道合并为一个管道。如何实现相同?

gulp.src returns 流(每个 .pipe 也是如此)。如果您考虑每个 .pipe 调用在做什么,您可以简单地将它变成一个 for 循环。像这样:

config = { /* your config object */ };

var stream = gulp.src(/* source glob */);
for (var i = 0; i < injects.length; i++) {
  stream = stream.pipe($.inject(gulp.src(prependSource(config.inject.source[i])), config.inject.starttag[i]));
}

stream.pipe($.size())
      .pipe(gulp.dest(dest));

return stream;