Fix theme-auto loading (#23504)

Fix regression from https://github.com/go-gitea/gitea/pull/23481. The conditional on the CSS import was being stripped away by webpack's `css-loader`, resulting in the dark theme always loading. The old syntax with `@import` nested inside `@media` also did not work as `css-loader` (rightfully) ignores such non-standard `@import` syntax that was previously supported by Less. Unfortunately, we have to re-introduce postcss to the CSS pipeline to fix this and I loaded only the minimal plugins to make it work. There is one variant of the fix that does work without postcss, which is to exclude the file from transpilation but I did not consider it as it would have meant the `@import` was being done without a version suffix in the URL, which would have caused cache issue. Related: https://github.com/webpack-contrib/css-loader/issues/1503 --------- Co-authored-by: John Olheiser <john.olheiser@gmail.com>
2 years ago · 19cbd5c3d9
parent 25ed8c25f3
commit 19cbd5c3d9
4 changed files with 313 additions and 54 deletions
--- a/package-lock.json
+++ b/package-lock.json
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+    "klona": {
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+      "resolved": "https://registry.npmjs.org/klona/-/klona-2.0.6.tgz",
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@ -14353,8 +14499,7 @@
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@ -15173,8 +15316,7 @@
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      "version": "0.2.0",
@ -15302,6 +15444,40 @@
        "source-map-js": "^1.0.2"
      }
    },
+    "postcss-import": {
+      "version": "15.1.0",
+      "resolved": "https://registry.npmjs.org/postcss-import/-/postcss-import-15.1.0.tgz",
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+        "read-cache": "^1.0.0",
+        "resolve": "^1.1.7"
+      }
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+      "resolved": "https://registry.npmjs.org/postcss-loader/-/postcss-loader-7.0.2.tgz",
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+        "cosmiconfig": "^7.0.0",
+        "klona": "^2.0.5",
+        "semver": "^7.3.8"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-7.1.0.tgz",
+          "integrity": "sha512-AdmX6xUzdNASswsFtmwSt7Vj8po9IuqXm0UXz7QKPuEUmPB4XyjGfaAr2PSuELMwkRMVH1EpIkX5bTZGRB3eCA==",
+          "requires": {
+            "@types/parse-json": "^4.0.0",
+            "import-fresh": "^3.2.1",
+            "parse-json": "^5.0.0",
+            "path-type": "^4.0.0",
+            "yaml": "^1.10.0"
+          }
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+    },
    "postcss-media-query-parser": {
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      "resolved": "https://registry.npmjs.org/postcss-media-query-parser/-/postcss-media-query-parser-0.2.3.tgz",
@ -15362,6 +15538,45 @@
        "util-deprecate": "^1.0.2"
      }
    },
+    "postcss-url": {
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+      "resolved": "https://registry.npmjs.org/postcss-url/-/postcss-url-10.1.3.tgz",
+      "integrity": "sha512-FUzyxfI5l2tKmXdYc6VTu3TWZsInayEKPbiyW+P6vmmIrrb4I6CGX0BFoewgYHLK+oIL5FECEK02REYRpBvUCw==",
+      "requires": {
+        "make-dir": "~3.1.0",
+        "mime": "~2.5.2",
+        "minimatch": "~3.0.4",
+        "xxhashjs": "~0.2.2"
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+      "dependencies": {
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+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
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+          "requires": {
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+          }
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+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.5.2.tgz",
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+        },
+        "minimatch": {
+          "version": "3.0.8",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.8.tgz",
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+          }
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+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw=="
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+    },
    "postcss-value-parser": {
      "version": "4.2.0",
      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
@ -15495,6 +15710,21 @@
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+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/read-cache/-/read-cache-1.0.0.tgz",
+      "integrity": "sha512-Owdv/Ft7IjOgm/i0xvNDZ1LrRANRfew4b2prF3OWMQLxLfu3bS8FVhCsrSCMK4lR56Y9ya+AThoTpDCTxCmpRA==",
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+        "pify": "^2.3.0"
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+      "dependencies": {
+        "pify": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
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+        }
+      }
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    "read-pkg": {
      "version": "5.2.0",
      "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-5.2.0.tgz",
@ -15697,8 +15927,7 @@
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      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
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@ -17214,6 +17443,14 @@
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      "dev": true
    },
+    "xxhashjs": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/xxhashjs/-/xxhashjs-0.2.2.tgz",
+      "integrity": "sha512-AkTuIuVTET12tpsVIQo+ZU6f/qDmKuRUcjaqR+OIvm+aCBsZ95i7UVY5WJ9TMsSaZ0DA2WxoZ4acu0sPH+OKAw==",
+      "requires": {
+        "cuint": "^0.2.2"
+      }
+    },
    "y18n": {
      "version": "5.0.8",
      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
@ -17226,6 +17463,11 @@
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      "dev": true
    },
+    "yaml": {
+      "version": "1.10.2",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.2.tgz",
+      "integrity": "sha512-r3vXyErRCYJ7wg28yvBY5VSoAF8ZvlcW9/BwUzEtUsjvX/DKs24dIkuwjtuprwJJHsbyUbLApepYTR1BN4uHrg=="
+    },
    "yargs": {
      "version": "17.3.1",
      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.3.1.tgz",
--- a/package.json
+++ b/package.json
@ -33,6 +33,9 @@
    "mini-css-extract-plugin": "2.7.2",
    "monaco-editor": "0.34.1",
    "monaco-editor-webpack-plugin": "7.0.1",
+    "postcss-import": "15.1.0",
+    "postcss-loader": "7.0.2",
+    "postcss-url": "10.1.3",
    "pretty-ms": "8.0.0",
    "sortablejs": "1.15.0",
    "swagger-ui-dist": "4.15.5",
--- a/web_src/css/themes/theme-auto.css
+++ b/web_src/css/themes/theme-auto.css
@ -1 +1,2 @@
+/* This import requires postcss-import so the media query is preserved in the output */
@import "./theme-arc-green.css" (prefers-color-scheme: dark);
--- a/webpack.config.js
+++ b/webpack.config.js
@ -145,10 +145,23 @@ export default {
            loader: 'css-loader',
            options: {
              sourceMap: true,
+              importLoaders: 1,
              url: {filter: filterCssImport},
              import: {filter: filterCssImport},
            },
          },
+          {
+            loader: 'postcss-loader', /* for conditional import in theme-auto.css */
+            options: {
+              sourceMap: true,
+              postcssOptions: {
+                plugins: [
+                  'postcss-import',
+                  'postcss-url',
+                ],
+              },
+            },
+          },
        ],
      },
      {