chore: disable esm/terser cache in travis (#1560)

.travis.yml

@@ -54,6 +54,8 @@ after_script:
 script: travis_retry yarn run $COMMAND
 env:
   global:
+    - ESM_DISABLE_CACHE=1 # this cache causes travis to rebuild its cache every single time
+    - TERSER_DISABLE_CACHE=1 # ditto
     - secure: "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"
     - secure: "E9t4zTDdPX9I4XgeC5zJEy+mIM2s0MFPpNfJ/mc5q/JX+gQkHSNkE/32NKgfSce85v33kWWxiPK4qorgX4B+v/MkK6kVQ2HSC7p4XttlQucvSICh/hYSM21WnH7g7DRNj3mDWHWEAwQuquaxVLfGWL60M/svnKG9MOoewos9iDj9AvANm6J09DjRmLuqmDV+VL+cV6ZL/SvUZ5Ervkgs/s3nXHEMse9rKMH/6/KncTGGPRolqyx86XSU6/XtRKX2+bEdiOaIxUYYvjcHJZTKxpSelPpEHjoUfWCM2CG3WyjtYkLF/1Romh8Ft4pnz+iiTzN3eWaT2ralOFvW30oB3cKbDcFb6LDGfXYw7v+XIORc79Ehcb2XlweEymf7fPhbx+7bkCfudRCMLw6OUWXoh66BBjOh2gcQYQ2+3U8KV7YKl/ZQHYb722wE6rN0YvJ6zGriWomDuV1smdyu4teo4lY2oVUUUGflyz2HWxnjVbqWizw4k69TNIcEEQ8j8YgdXMUxNMUOJoCu0c3Lnd8J1BeU/7LX87c54/oCMjEivnsENGIC/EUgAoXDi3L0y7HzHgaDs112p5zjspJsSSON/T4E2uyyb2RpjBY4Ghl43a/RDAlv1gUFtvbanphg3PEGMfG7B2gxk9Z/v5J9pUP/NtsspmT2MvTHZXtH/44XPEU="
 matrix:

webpack/client.config.js

@@ -86,9 +86,10 @@ module.exports = {
     setImmediate: false
   },
   optimization: dev ? {} : {
+    minimize: !process.env.DEBUG,
     minimizer: [
       terser()
-    ].filter(Boolean),
+    ],
     splitChunks: {
       chunks: 'async',
       minSize: 5000,

webpack/server.config.js

@@ -2,6 +2,7 @@ const webpack = require('webpack')
 const config = require('sapper/config/webpack.js')
 const pkg = require('../package.json')
 const { mode, dev, resolve, inlineSvgs, allSvgs } = require('./shared.config')
+const terser = require('./terser.config')
 
 // modules that the server should ignore, either because they cause errors or warnings
 // (because they're only used on the client side)
@@ -47,6 +48,12 @@ module.exports = {
   performance: {
     hints: false // it doesn't matter if server.js is large
   },
+  optimization: dev ? {} : {
+    minimize: !process.env.DEBUG,
+    minimizer: [
+      terser()
+    ]
+  },
   plugins: [
     new webpack.DefinePlugin({
       'process.env.INLINE_SVGS': JSON.stringify(inlineSvgs),

webpack/service-worker.config.js

@@ -15,13 +15,18 @@ module.exports = {
       process.env.LEGACY && legacyBabel()
     ].filter(Boolean)
   },
+  optimization: dev ? {} : {
+    minimize: !process.env.DEBUG,
+    minimizer: [
+      terser()
+    ]
+  },
   plugins: [
     new webpack.DefinePlugin({
       'process.browser': true,
       'process.env.NODE_ENV': JSON.stringify(mode),
       'process.env.LEGACY': !!process.env.LEGACY,
       'process.env.SAPPER_TIMESTAMP': process.env.SAPPER_TIMESTAMP || Date.now()
-    }),
+    })
-    terser()
   ].filter(Boolean)
 }

webpack/terser.config.js

@@ -1,8 +1,8 @@
 const TerserWebpackPlugin = require('terser-webpack-plugin')
 
-module.exports = () => !process.env.DEBUG && new TerserWebpackPlugin({
+module.exports = () => new TerserWebpackPlugin({
   exclude: /tesseract-asset/,
-  cache: true,
+  cache: !process.env.TERSER_DISABLE_CACHE,
   parallel: true,
   sourceMap: true,
   terserOptions: {