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types/gulp-postcss/gulp-postcss-test.ts

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+import * as gulp from 'gulp';
+import * as postcss from 'gulp-postcss';
+import * as autoprefixer from 'autoprefixer';
+import * as Vinyl from 'vinyl'
+
+gulp.task('postCss1', () => {
+    return gulp.src('./src/*.css')
+        .pipe(postcss())
+        .pipe(gulp.dest('./dest'));
+});
+
+gulp.task('postCss2', () => {
+    const postCssPlugins = [ autoprefixer({browsers: ['last 1 version']}) ];
+    return gulp.src('./src/*.css')
+        .pipe(postcss(postCssPlugins))
+        .pipe(gulp.dest('./dest'));
+});
+
+/*
+gulp.task('postCss3', () => {
+    const plugins = [ autoprefixer({browsers: ['last 1 version']}) ];
+    return gulp.src('in.sss')
+        .pipe(postcss(plugins, { parser: sugarss }))
+        .pipe(gulp.dest('out'));
+});
+*/
+
+gulp.task('postCss4', () => {
+    function callback(file: Vinyl) {
+        return {
+            plugins: [
+                require('postcss-import')({ root: file.dirname }),
+                require('postcss-modules')
+            ],
+            options: {
+                parser: file.extname === '.sss' ? require('sugarss') : false
+            }
+        };
+    }
+    return gulp.src('./src/*.css')
+        .pipe(postcss(callback))
+        .pipe(gulp.dest('./dest'));
+});

types/gulp-postcss/index.d.ts

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+// Type definitions for gulp-postcss 8.0
+// Project: https://www.npmjs.com/package/gulp-postcss
+// Definitions by: Takesi Tokugawa <https://github.com/TokugawaTakesi>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node"/>
+import Vinyl = require('vinyl');
+
+declare function GulpPostCss(plugins?: string[], options?: GulpPostCss.Options): NodeJS.ReadWriteStream;
+declare function GulpPostCss(callback?: (file: Vinyl) => { plugins?: string[], options?: GulpPostCss.Options }):
+    NodeJS.ReadWriteStream;
+
+declare namespace GulpPostCss {
+    interface Options {
+        parser?: Object;
+    }
+}
+
+export = GulpPostCss;

types/gulp-postcss/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "gulp-tap-tests.ts"
+    ]
+}

types/gulp-postcss/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}