cssnano · ludofischer · Dec 18, 2021 · Dec 17, 2021 · Dec 17, 2021
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -12,17 +12,21 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 6.24.0
       - name: Install Node.js 16.x
         uses: actions/setup-node@v2
         with:
           node-version: '16'
-          cache: 'yarn'
+          cache: 'pnpm'
 
       - name: Install dependencies
-        run: yarn --frozen-lockfile
+        run: pnpm install --frozen-lockfile
 
       - name: Run lint
-        run: yarn lint
+        run: pnpm lint
 
   test:
     needs: lint
@@ -39,20 +43,41 @@ jobs:
 
       - uses: actions/checkout@v2
 
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        if: matrix.node-version != '10'
+        with:
+          version: 6.24.0
+
       - name: Install Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v2
+        if: matrix.node-version != '10'
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'pnpm'
+
+      - name: Install old pnpm
+        uses: pnpm/action-setup@v2
+        if: matrix.node-version == '10'
+        with:
+          version: 5.18.4
+
+      # No cache support on GH actions for old pnpm 
+      - name: Install Node.js without cache ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        if: matrix.node-version == '10'
         with:
           node-version: ${{ matrix.node-version }}
-          cache: 'yarn'
 
       - name: Install dependencies
-        run: yarn --frozen-lockfile
+        run: pnpm install --frozen-lockfile
 
       - name: Run tests with coverage
-        run: yarn test:coverage
+        run: pnpm test:coverage
 
       - name: Publish code coverage report
         if: matrix.os == 'ubuntu-latest' && matrix.node-version == '16'
         uses: codecov/codecov-action@v2
         with:
           name: codecov
+
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -9,19 +9,19 @@ you add yourself to the list of contributors, found in [CONTRIBUTORS.md].
 ## How can I contribute to cssnano's code?
 
 Since version 4, we develop in a monorepo. This is because a lot of transforms overlap with each other; it's
-easier to test them together. Other than this, you'll need Node.js, yarn &
+easier to test them together. Other than this, you'll need Node.js, pnpm &
 git installed. Then, you can run these commands to get the repository set up:
 
 ```
 git clone git@github.com:cssnano/cssnano.git
 cd cssnano
-yarn install
+pnpm install
 ```
 
 You can run the tests with:
 
 ```
-yarn test
+pnpm test
 ```
 
 We recommend that you look in the issue tracker to find anything tagged
@@ -38,9 +38,9 @@ To help us generate the changelog, follow the [conventional commits](https://www
 ### Documentation
 
 The documentation website is also included with the repository, under `/site`.
-It runs [docusaurus](https://docusaurus.io) and requires a separate `yarn install`
+It runs [docusaurus](https://docusaurus.io) and requires a separate `pnpm install`
 to pull down the dependencies. You can then browse the documentation locally
-by running `yarn start`.
+by running `pnpm start`.
 
 Note that some of the documentation is automatically generated and should not
 be edited by hand.
@@ -53,7 +53,7 @@ with the description of the change and the affected packages.
 To create a changeset run
 
 ```
-yarn changeset
+pnpm changeset
 ```
 
 It's best to select the affected packages by hand rather than rely on the tools automatically
@@ -62,19 +62,19 @@ select the plugin and `cssnano-preset-default` by hand (as well as any other dep
 To tag a release and generate the changelog, run:
 
 ```
-yarn changeset version
+pnpm changeset version
 ```
 
 To publish release to npm, run:
 
 ```
-yarn all-publish
+pnpm all-publish
 ```
 
 If you don't use the `package.json` script, do not forget to rebuild the packages first!
 
-1. `yarn prepare`
-2. `yarn changeset publish`
+1. `pnpm prepare`
+2. `pnpm changeset publish`
 
 ## Are there other ways of contributing?
 

diff --git a/package.json b/package.json
@@ -3,14 +3,14 @@
   "private": true,
   "scripts": {
     "lint": "eslint . --cache --ignore-path .gitignore --ext .js,.mjs",
-    "fixlint": "yarn lint -- --fix",
-    "prepare": "yarn workspaces run prepare",
+    "fixlint": "pnpm lint -- --fix",
+    "prepare": "pnpm run -r prepare",
     "build:integration": "node ./util/buildFrameworks.mjs",
-    "pretest": "yarn lint",
+    "pretest": "pnpm lint",
     "test:only": "uvu -r @babel/register packages \"__tests__.*\\.js$\"",
-    "test:coverage": "c8 yarn test:only",
-    "test": "yarn test:coverage",
-    "all-publish": "yarn prepare && yarn changeset publish"
+    "test:coverage": "c8 pnpm test:only",
+    "test": "pnpm test:coverage",
+    "all-publish": "pnpm prepare && pnpm changeset publish"
   },
   "workspaces": [
     "./packages/*"

diff --git a/packages/css-size/package.json b/packages/css-size/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "files": [
     "LICENSE-MIT",

diff --git a/packages/cssnano-preset-advanced/package.json b/packages/cssnano-preset-advanced/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "files": [
     "LICENSE-MIT",

diff --git a/packages/cssnano-preset-default/package.json b/packages/cssnano-preset-default/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "files": [
     "LICENSE-MIT",

diff --git a/packages/cssnano-preset-lite/package.json b/packages/cssnano-preset-lite/package.json
@@ -6,7 +6,7 @@
     "scripts": {
         "prebuild": "rimraf dist",
         "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-        "prepare": "yarn build"
+        "prepare": "pnpm build"
     },
     "files": [
         "LICENSE-MIT",

diff --git a/packages/cssnano-utils/package.json b/packages/cssnano-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "homepage": "https://github.com/cssnano/cssnano",
   "bugs": {

diff --git a/packages/cssnano/package.json b/packages/cssnano/package.json
@@ -7,7 +7,7 @@
         "bundle-size": "webpack --json --config src/__tests__/_webpack.config.js | webpack-bundle-size-analyzer",
         "prebuild": "rimraf dist",
         "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-        "prepare": "yarn build"
+        "prepare": "pnpm build"
     },
     "funding": {
         "type": "opencollective",
@@ -25,7 +25,6 @@
     "license": "MIT",
     "dependencies": {
         "cssnano-preset-default": "^5.1.9",
-        "is-resolvable": "^1.1.0",
         "lilconfig": "^2.0.3",
         "yaml": "^1.10.2"
     },

diff --git a/packages/cssnano/src/index.js b/packages/cssnano/src/index.js
@@ -2,10 +2,22 @@ import path from 'path';
 import postcss from 'postcss';
 import yaml from 'yaml';
 import { lilconfigSync } from 'lilconfig';
-import isResolvable from 'is-resolvable';
 
 const cssnano = 'cssnano';
 
+/*
+ * @param {string} moduleId
+ * @returns {boolean}
+ */
+function isResolvable(moduleId) {
+  try {
+    require.resolve(moduleId);
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
 /*
  * preset can be one of four possibilities:
  * preset = 'default'

diff --git a/packages/postcss-colormin/package.json b/packages/postcss-colormin/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "color",

diff --git a/packages/postcss-convert-values/package.json b/packages/postcss-convert-values/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-discard-comments/package.json b/packages/postcss-discard-comments/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-discard-duplicates/package.json b/packages/postcss-discard-duplicates/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-discard-empty/package.json b/packages/postcss-discard-empty/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "compress",

diff --git a/packages/postcss-discard-overridden/package.json b/packages/postcss-discard-overridden/package.json
@@ -25,7 +25,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "engines": {
     "node": "^10 || ^12 || >=14.0"

diff --git a/packages/postcss-discard-unused/package.json b/packages/postcss-discard-unused/package.json
@@ -11,7 +11,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-merge-idents/package.json b/packages/postcss-merge-idents/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-merge-longhand/package.json b/packages/postcss-merge-longhand/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-merge-rules/package.json b/packages/postcss-merge-rules/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-minify-font-values/package.json b/packages/postcss-minify-font-values/package.json
@@ -27,7 +27,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "engines": {
     "node": "^10 || ^12 || >=14.0"

diff --git a/packages/postcss-minify-gradients/package.json b/packages/postcss-minify-gradients/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "files": [
     "LICENSE-MIT",

diff --git a/packages/postcss-minify-params/package.json b/packages/postcss-minify-params/package.json
@@ -30,7 +30,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "engines": {
     "node": "^10 || ^12 || >=14.0"

diff --git a/packages/postcss-minify-selectors/package.json b/packages/postcss-minify-selectors/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",

diff --git a/packages/postcss-normalize-charset/package.json b/packages/postcss-normalize-charset/package.json
@@ -22,7 +22,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "engines": {
     "node": "^10 || ^12 || >=14.0"

diff --git a/packages/postcss-normalize-display-values/package.json b/packages/postcss-normalize-display-values/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "files": [
     "LICENSE-MIT",

diff --git a/packages/postcss-normalize-positions/package.json b/packages/postcss-normalize-positions/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "babel src --config-file ../../babel.config.json --out-dir dist --ignore \"**/__tests__/\"",
-    "prepare": "yarn build"
+    "prepare": "pnpm build"
   },
   "keywords": [
     "css",