From c20b75252b7e8cea1c603421629349784300a19d Mon Sep 17 00:00:00 2001
From: Daniel Huigens <d.huigens@protonmail.com>
Date: Tue, 12 May 2020 22:50:55 +0200
Subject: [PATCH] Add --build-only parameter to filter build outputs

Also, don't generate test bundle by default, but provide
`npm run build-test` instead.
---
 package.json     |  2 ++
 rollup.config.js | 14 ++++++++++++--
 travis.sh        |  1 +
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 955dce86..c63312f3 100644
--- a/package.json
+++ b/package.json
@@ -27,9 +27,11 @@
   ],
   "scripts": {
     "build": "rollup --config",
+    "build-test": "npm run build --build-only=test",
     "prepare": "npm run build",
     "test": "mocha --timeout 120000 test/unittests.js",
     "start": "http-server",
+    "prebrowsertest": "npm run build-test",
     "browsertest": "npm start -- -o test/unittests.html",
     "coverage": "nyc npm test",
     "lint": "eslint 'src/**/*.js' 'test/crypto/**/*.js'",
diff --git a/rollup.config.js b/rollup.config.js
index 5a668d9e..4fa16b21 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -23,7 +23,7 @@ const terserOptions = {
   }
 };
 
-export default [
+export default Object.assign([
   {
     input: 'src/index.js',
     output: [
@@ -100,4 +100,14 @@ export default [
       })
     ]
   }
-];
+].filter(config => {
+  config.output = config.output.filter(output => {
+    return (output.file || output.dir + '/' + output.entryFileNames).includes(
+      process.env.npm_config_build_only || // E.g. `npm install --build-only=lightweight`.
+      'dist' // Don't build test bundle by default.
+    );
+  });
+  return config.output.length;
+}), {
+  allow_empty: true // Fake option to trick rollup into accepting empty config array when filtered above.
+});
diff --git a/travis.sh b/travis.sh
index 7824a171..2cfa3cb3 100755
--- a/travis.sh
+++ b/travis.sh
@@ -14,6 +14,7 @@ elif [ $OPENPGPJSTEST = "unit" ]; then
 elif [ $OPENPGPJSTEST = "browserstack" ]; then
   echo "Running OpenPGP.js browser unit tests on Browserstack."
 
+  npm run build-test
   echo -n "Using config: "
   echo "{\"browsers\": [$BROWSER], \"test_framework\": \"mocha\", \"test_path\": [\"test/unittests.html?ci=true${LIGHTWEIGHT+&lightweight=true&grep=lightweight}\"], \"timeout\": 1800, \"exit_with_fail\": true, \"project\": \"openpgpjs/${TRAVIS_EVENT_TYPE:-push}${LIGHTWEIGHT:+/lightweight}\"}" > browserstack.json
   cat browserstack.json