Make dependencies of config watchable

Author: Serhii Pashchenko

package.json

@@ -42,6 +42,7 @@
     "autoprefixer": "^9.4.5",
     "bytes": "^3.0.0",
     "chalk": "^2.4.1",
+    "detective": "^5.2.0",
     "fs-extra": "^8.0.0",
     "lodash": "^4.17.11",
     "node-emoji": "^1.8.1",

src/index.js

@@ -4,6 +4,7 @@ import fs from 'fs'
 import _ from 'lodash'
 import postcss from 'postcss'
 
+import getModuleDependencies from './lib/getModuleDependencies'
 import registerConfigAsDependency from './lib/registerConfigAsDependency'
 import processTailwindFeatures from './processTailwindFeatures'
 import formatCSS from './lib/formatCSS'
@@ -49,7 +50,9 @@ const getConfigFunction = config => () => {
   }
 
   if (!_.isObject(config)) {
-    delete require.cache[require.resolve(config)]
+    getModuleDependencies(config).forEach(mdl => {
+      delete require.cache[require.resolve(mdl.file)]
+    })
   }
 
   return resolveConfig([

src/lib/getModuleDependencies.js

@@ -0,0 +1,30 @@
+import fs from 'fs'
+import path from 'path'
+import resolve from 'resolve'
+import detective from 'detective'
+
+function createModule(file) {
+  const source = fs.readFileSync(file, 'utf-8')
+  const requires = detective(source)
+
+  return { file, requires }
+}
+
+export default function getModuleDependencies(entryFile) {
+  const rootModule = createModule(entryFile)
+  const modules = [rootModule]
+
+  // Iterate over the modules, even when new
+  // ones are being added
+  for (const mdl of modules) {
+    mdl.requires.forEach(dep => {
+      const basedir = path.dirname(mdl.file)
+      const depPath = resolve.sync(dep, { basedir })
+      const depModule = createModule(depPath)
+
+      modules.push(depModule)
+    })
+  }
+
+  return modules
+}

src/lib/registerConfigAsDependency.js

@@ -1,15 +1,18 @@
 import fs from 'fs'
+import getModuleDependencies from './getModuleDependencies'
 
 export default function(configFile) {
   if (!fs.existsSync(configFile)) {
     throw new Error(`Specified Tailwind config file "${configFile}" doesn't exist.`)
   }
 
   return function(css, opts) {
-    opts.messages.push({
-      type: 'dependency',
-      file: configFile,
-      parent: css.source.input.file,
+    getModuleDependencies(configFile).forEach(mdl => {
+      opts.messages.push({
+        type: 'dependency',
+        parent: css.source.input.file,
+        file: mdl.file,
+      })
     })
   }
 }

yarn.lock

@@ -914,6 +914,11 @@ abbrev@1:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
   integrity sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==
 
+acorn-dynamic-import@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-4.0.0.tgz#482210140582a36b83c3e342e1cfebcaa9240948"
+  integrity sha512-d3OEjQV4ROpoflsnUA8HozoIR504TFxNivYEUi6uwz0IYhBkTDXGuWlNdMtybRt3nqVx/L6XqMt0FxkXuWKZhw==
+
 acorn-globals@^4.1.0:
   version "4.3.2"
   resolved "https://registry.yarnpkg.com/acorn-globals/-/acorn-globals-4.3.2.tgz#4e2c2313a597fd589720395f6354b41cd5ec8006"
@@ -927,7 +932,17 @@ acorn-jsx@^5.0.0:
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.1.tgz#32a064fd925429216a09b141102bfdd185fae40e"
   integrity sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==
 
-acorn-walk@^6.0.1:
+acorn-node@^1.6.1:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/acorn-node/-/acorn-node-1.7.0.tgz#aac6a559d27af6176b076ab6fb13c5974c213e3b"
+  integrity sha512-XhahLSsCB6X6CJbe+uNu3Mn9sJBNFxtBN9NLgAOQovfS6Kh0lDUtmlclhjn9CvEK7A7YyRU13PXlNcpSiLI9Yw==
+  dependencies:
+    acorn "^6.1.1"
+    acorn-dynamic-import "^4.0.0"
+    acorn-walk "^6.1.1"
+    xtend "^4.0.1"
+
+acorn-walk@^6.0.1, acorn-walk@^6.1.1:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-6.2.0.tgz#123cb8f3b84c2171f1f7fb252615b1c78a6b1a8c"
   integrity sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==
@@ -942,6 +957,11 @@ acorn@^6.0.1, acorn@^6.0.7:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.2.0.tgz#67f0da2fc339d6cfb5d6fb244fd449f33cd8bbe3"
   integrity sha512-8oe72N3WPMjA+2zVG71Ia0nXZ8DpQH+QyyHO+p06jT8eg8FGG3FbcUIi8KziHlAfheJQZeoqbvq1mQSQHXKYLw==
 
+acorn@^6.1.1:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.2.1.tgz#3ed8422d6dec09e6121cc7a843ca86a330a86b51"
+  integrity sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q==
+
 ajv@^6.10.0, ajv@^6.5.5, ajv@^6.9.1:
   version "6.10.0"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.10.0.tgz#90d0d54439da587cd7e843bfb7045f50bd22bdf1"
@@ -1588,6 +1608,11 @@ define-property@^2.0.2:
     is-descriptor "^1.0.2"
     isobject "^3.0.1"
 
+defined@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
+  integrity sha1-yY2bzvdWdBiOEQlpFRGZ45sfppM=
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
@@ -1608,6 +1633,15 @@ detect-newline@^2.1.0:
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
   integrity sha1-9B8cEL5LAOh7XxPaaAdZ8sW/0+I=
 
+detective@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/detective/-/detective-5.2.0.tgz#feb2a77e85b904ecdea459ad897cc90a99bd2a7b"
+  integrity sha512-6SsIx+nUUbuK0EthKjv0zrdnajCCXVYGmbYYiYjFVpzcjwEs/JMDZ8tPRG29J/HhN56t3GJp2cGSWDRjjot8Pg==
+  dependencies:
+    acorn-node "^1.6.1"
+    defined "^1.0.0"
+    minimist "^1.1.1"
+
 diff-sequences@^24.3.0:
   version "24.3.0"
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.3.0.tgz#0f20e8a1df1abddaf4d9c226680952e64118b975"
@@ -4963,6 +4997,11 @@ xml-name-validator@^3.0.0:
   resolved "https://registry.yarnpkg.com/xml-name-validator/-/xml-name-validator-3.0.0.tgz#6ae73e06de4d8c6e47f9fb181f78d648ad457c6a"
   integrity sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==
 
+xtend@^4.0.1:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
+  integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
+
 "y18n@^3.2.1 || ^4.0.0":
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.0.tgz#95ef94f85ecc81d007c264e190a120f0a3c8566b"