build: add support to gcov and codecov

Add support to gcov through a `npm install` flag
(`--llnode_coverage=true`), and update Travis settings to upload
coverage report to CodeCov on success.

PR-URL: #258
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>

Author: mmarchini

.gitignore

@@ -15,3 +15,5 @@ package-lock.json
 # Generated by scripts/configure.js
 config.gypi
 llnode.js
+*.gcov
+*.info

.travis.yml

@@ -10,31 +10,42 @@ matrix:
       dist: trusty
       before_install:
         - sudo apt-get -qq update
-        - sudo apt-get install lldb-3.9 liblldb-3.9-dev -y
-      install: npm install --llnode_build_addon=true
+        - sudo apt-get install lldb-3.9 liblldb-3.9-dev lcov -y
+      install:
+        - npm install --llnode_build_addon=true --llnode_coverage=true
       script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test-all
       node_js: "6"
+      after_success:
+        - npm run coverage
+        - npm run codecov-upload
 
     - name: "[Trusty] Node.js v8.x"
       sudo: required
       dist: trusty
       before_install:
         - sudo apt-get -qq update
-        - sudo apt-get install lldb-3.9 liblldb-3.9-dev -y
-      install: npm install --llnode_build_addon=true
+        - sudo apt-get install lldb-3.9 liblldb-3.9-dev lcov -y
+      install:
+        - npm install --llnode_build_addon=true
       script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test-all
       node_js: "8"
+      after_success:
+        - npm run coverage
+        - npm run codecov-upload
 
     - name: "[Trusty] Node.js v10.x"
       sudo: required
       dist: trusty
       before_install:
         - sudo apt-get -qq update
-        - sudo apt-get install lldb-3.9 liblldb-3.9-dev -y
-      install: npm install --llnode_build_addon=true
+        - sudo apt-get install lldb-3.9 liblldb-3.9-dev lcov -y
+      install:
+        - npm install --llnode_build_addon=true --llnode_coverage=true
       script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test-all
       node_js: "10"
-
+      after_success:
+        - npm run coverage
+        - npm run codecov-upload
 
     ###########################
     # Nightlies & V8 Canaries #
@@ -47,13 +58,16 @@ matrix:
       dist: trusty
       before_install:
         - sudo apt-get -qq update
-        - sudo apt-get install lldb-3.9 liblldb-3.9-dev -y
+        - sudo apt-get install lldb-3.9 liblldb-3.9-dev lcov -y
       install:
         - npm install --nodedir=$(dirname $(dirname $(which node)))/include/node
-      script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test-plugin
+      script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test
       env:
         - NVM_NODEJS_ORG_MIRROR=https://nodejs.org/download/nightly
         - NODEJS_ORG_MIRROR=https://nodejs.org/download/nightly
+      after_success:
+        - npm run coverage
+        - npm run codecov-upload
 
     # Addon is not tested due to lack of node-addon-api
     - name: "[Trusty] Node.js V8 Canary"
@@ -62,13 +76,16 @@ matrix:
       dist: trusty
       before_install:
         - sudo apt-get -qq update
-        - sudo apt-get install lldb-3.9 liblldb-3.9-dev -y
+        - sudo apt-get install lldb-3.9 liblldb-3.9-dev lcov -y
       install:
         - npm install --nodedir=$(dirname $(dirname $(which node)))/include/node
-      script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test-plugin
+      script: TEST_LLDB_BINARY=`which lldb-3.9` npm run test
       env:
         - NVM_NODEJS_ORG_MIRROR=https://nodejs.org/download/v8-canary
         - NODEJS_ORG_MIRROR=https://nodejs.org/download/v8-canary
+      after_success:
+        - npm run coverage
+        - npm run codecov-upload
 
     ########
     # OS X #

Makefile

@@ -44,6 +44,12 @@ plugin: configure
 addon: configure-with-addon
 	node-gyp rebuild
 
+.PHONY: coverage
+coverage:
+	lcov --capture --directory build/ --output-file coverage-cc.info
+	lcov --remove coverage-cc.info "/usr/*" "*/deps/*" "*/node_modules/*" --output-file coverage-cc.info # filter system-files
+	lcov --list coverage-cc.info
+
 .PHONY: clean
 clean:
 	$(RM) -r build

binding.gyp

@@ -10,6 +10,7 @@
       "lldb_lib_dir%": "",
       "lldb_lib_so%": "",
       "build_addon": "false",
+      "coverage": "false",
   },
 
   "target_defaults": {
@@ -39,6 +40,10 @@
           "<(lldb_lib_dir)/<(lldb_lib)",
         ],
       }],
+      [ "coverage == 'true'", {
+        "cflags": [ "--coverage" ],
+        "ldflags" : [ "--coverage" ],
+      }],
     ]
   },
 

package.json

@@ -16,7 +16,9 @@
     "test-plugin": "tape test/plugin/*-test.js",
     "test-addon": "tape test/addon/*-test.js",
     "test-all": "npm run test-addon && npm run test-plugin",
-    "test": "npm run test-plugin"
+    "test": "npm run test-plugin",
+    "coverage": "make coverage",
+    "codecov-upload": "codecov --disable=gcov --file=coverage-cc.info"
   },
   "repository": {
     "type": "git",
@@ -44,6 +46,7 @@
   },
   "homepage": "https://github.com/nodejs/llnode#readme",
   "devDependencies": {
+    "codecov": "^3.1.0",
     "tape": "^4.4.0"
   },
   "dependencies": {

scripts/configure.js

@@ -19,15 +19,24 @@ function main() {
 
 main();
 
-// Do not build addon by default until it's less experimental
 function configureBuildOptions(config) {
+  // Do not build addon by default until it's less experimental
   const build_addon = (process.env.npm_config_llnode_build_addon ||
     process.env.LLNODE_BUILD_ADDON);
   if (build_addon) {
     config.variables.build_addon = build_addon;
   } else {
     config.variables.build_addon = 'false';
   }
+
+  // Optionally build with support for gcov
+  const coverage = (process.env.npm_config_llnode_coverage ||
+    process.env.LLNODE_COVERAGE);
+  if (coverage) {
+    config.variables.coverage = coverage;
+  } else {
+    config.variables.coverage = 'false';
+  }
 }
 
 /**