Add --check option

package.json

@@ -36,12 +36,16 @@
     "chalk": "4.1.0",
     "chokidar": "3.4.0",
     "css-color-function": "1.3.3",
+    "csso": "^4.0.3",
     "deepmerge": "4.2.2",
     "fast-glob": "3.2.2",
     "fs-extra": "8.1.0",
+    "fs-monkey": "^1.0.1",
+    "memfs": "^3.2.0",
     "normalize-path": "3.0.0",
     "read-pkg-up": "7.0.1",
     "style-dictionary": "2.10.0",
+    "unionfs": "^4.4.0",
     "yaml": "1.10.0"
   },
   "devDependencies": {

src/cli/build.ts

@@ -1,18 +1,23 @@
+import { dirname, relative } from 'path'
+import { Union } from 'unionfs'
+import { Volume } from 'memfs'
+import * as fs from 'fs-extra'
 import { resolve } from 'path'
 import { Command, flags } from '@oclif/command'
 import { watch } from 'chokidar'
 import chalk from 'chalk'
 
-import { loadConfig } from '../core/config'
+import { Config, loadConfig } from '../core/config'
 import { build } from '../core/build'
 import { loadTheme } from '../core/load-theme'
-import { debounce, flatten } from '../core/utils'
+import { debounce, flatten, normalizeCss } from '../core/utils'
 
 type Flags = {
   config: string
   watch: boolean
   entry: string[]
   output: string[]
+  check: boolean
 }
 
 export default class Build extends Command {
@@ -38,6 +43,10 @@ export default class Build extends Command {
       multiple: true,
       description: 'Builds selected outputs.',
     }),
+    check: flags.boolean({
+      description: 'Checks existent output files satisfy the config file.',
+      default: false,
+    }),
   }
 
   async run() {
@@ -47,6 +56,10 @@ export default class Build extends Command {
       outputs: flags.output,
     })
 
+    if (flags.check) {
+      return this.check(config)
+    }
+
     await this.build(config)
 
     if (flags.watch) {
@@ -85,12 +98,61 @@ export default class Build extends Command {
     }
   }
 
-  private async build(config: any) {
+  private async build(config: Config) {
     console.log(`----------------- ${chalk.yellow('Build started')} -----------------`)
     await build(config)
     console.log(`\n---------------- ${chalk.green('Build completed')} ----------------`)
   }
 
+  private async check(config: Config) {
+    const memfs = Volume.fromJSON({})
+    const ufs = new Union().use(fs as any).use(memfs as any)
+
+    // workaround https://github.com/streamich/unionfs/issues/425
+    const { openSync } = ufs
+    ufs.openSync = function(this, path) {
+      if (typeof path === 'string') {
+        memfs.mkdirpSync(dirname(path))
+      }
+      return openSync.apply(this, arguments as any)
+    }
+
+    const unpatchFsExtra = require('fs-monkey').patchFs(ufs, require('fs-extra'))
+    const unpatchFs = require('fs-monkey').patchFs(ufs)
+    try {
+      await build(config)
+    } finally {
+      unpatchFsExtra()
+      unpatchFs()
+    }
+
+    let failed = false
+    const files = memfs.toJSON()
+
+    for (const [fileName, fileContent] of Object.entries(files)) {
+      if (fileContent) {
+        if (!fs.existsSync(fileName)) {
+          console.log(chalk.red(`${relative(process.cwd(), fileName)} doesn't exist`))
+          continue
+        }
+        const fileOldContent = fs.readFileSync(fileName, 'utf8')
+        if (fileName.endsWith('.css')) {
+          if (normalizeCss(fileContent) !== normalizeCss(fileOldContent)) {
+            failed = true
+            console.log(chalk.red(`${relative(process.cwd(), fileName)} (CSS file) is outdated`))
+          }
+        } else if (fileContent !== fileOldContent) {
+          failed = true
+          console.log(chalk.red(`${relative(process.cwd(), fileName)} (text file) is outdated`))
+        }
+      }
+    }
+
+    if (failed) {
+      throw 'failed'
+    }
+  }
+
   private emitWatching() {
     console.log('\nWatching for changes...')
   }

src/core/utils.ts

@@ -43,3 +43,9 @@ export function flatten<T extends any[]>(arrays: T[]): ArrayType<T>[] {
 export function normalizePaths(paths: string[]): string[] {
   return paths.map((path) => normalize(path))
 }
+
+export function normalizeCss(text: string): string {
+  const csso = require('csso')
+  // workaround https://github.com/css/csso/issues/422
+  return csso.minify(text.replace(/--/g, '____')).css.replace(/____/g, '--')
+}

tsconfig.json

@@ -1,62 +1,14 @@
 {
   "compilerOptions": {
-    /* Basic Options */
-    "target": "ESNext" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */,
-    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
-    // "lib": [],                             /* Specify library files to be included in the compilation. */
-    // "allowJs": true,                       /* Allow javascript files to be compiled. */
-    // "checkJs": true,                       /* Report errors in .js files. */
-    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
-    "declaration": true /* Generates corresponding '.d.ts' file. */,
-    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
-    // "outFile": "./",                       /* Concatenate and emit output to single file. */
-    "outDir": "./lib" /* Redirect output structure to the directory. */,
-    "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
-    // "composite": true,                     /* Enable project compilation */
-    // "removeComments": true,                /* Do not emit comments to output. */
-    // "noEmit": true,                        /* Do not emit outputs. */
-    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
-    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+    "target": "es6",
+    "module": "commonjs",
+    "declaration": true,
+    "outDir": "./lib",
+    "rootDir": "./src",
     "stripInternal": true,
-
-    /* Strict Type-Checking Options */
-    "strict": true /* Enable all strict type-checking options. */,
-    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
-    // "strictNullChecks": true,              /* Enable strict null checks. */
-    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
-    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
-    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-
-    /* Additional Checks */
-    // "noUnusedLocals": true,                /* Report errors on unused locals. */
-    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-
-    /* Module Resolution Options */
-    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
-    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
-    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                       /* List of folders to include type definitions from. */
-    // "types": [],                           /* Type declaration files to be included in compilation. */
-    "allowSyntheticDefaultImports": true /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */,
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
-    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
-
-    /* Source Map Options */
-    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-
-    /* Experimental Options */
-    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+    "strict": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true
   },
   "include": ["src"]
 }