feat: initial commit

.eslintignore

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+example/android/
+example/node_modules/
+example/ios/

.eslintrc.js

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+module.exports = {
+  root: true,
+  extends: '@react-native-community',
+};

.gitattributes

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+*.pbxproj -text

.gitignore

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+# OSX
+#
+.DS_Store
+
+# node.js
+#
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# Xcode
+#
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+project.xcworkspace
+
+# Android/IntelliJ
+#
+build/
+.idea
+.gradle
+local.properties
+*.iml
+
+# BUCK
+buck-out/
+\.buckd/
+*.keystore

.huskyrc

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+{
+  "hooks": {
+    "pre-commit": "yarn lint && yarn pretty-quick --staged",
+    "commit-msg": "commitlint -E HUSKY_GIT_PARAMS"
+  }
+}

.prettierrc.yml

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+printWidth: 80
+singleQuote: true
+trailingComma: 'all'
+arrowParens: 'always'

.releaserc.json

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+{
+  "branch": "master",
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/npm",
+    "@semantic-release/git",
+    "@semantic-release/github"
+  ]
+}

.travis.yml

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+language: node_js
+
+cache:
+  directories:
+    - node_modules
+node_js:
+  - 10
+
+branches:
+  only:
+    - master
+
+before_script:
+  - npm prune
+script:
+  - npm run semantic-release

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2019 Konstantin Kuznetsov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# react-native-startup-time
+
+This module helps you to measure your app launch time. It is measured from the earliest point in time available to the native module, that is the module's initialization. When `getTimeSinceStartup` is called on JS side, you'll get a promise which resolves with difference between these two moments in ms. This is not very accurate, but should give you good enough base for further optimizations.
+
+On iOS time measurement is based on [this article](https://medium.com/@michael.eisel/measuring-your-ios-apps-pre-main-time-in-the-wild-98197f3d95b4). On Android [SystemClock.uptimeMills](https://developer.android.com/reference/android/os/SystemClock.html) is used.
+
+As far as I know, there's no way to programmatically obtain time passed since the moment when user taps on app icon. For this you have to use native dev tools. On Android this module will call `reportFullyDrawn` so you can inspect adb logs.
+
+If you know a better way to measure startup time (in a module), let me know or better shoot a PR.
+
+## Getting started
+
+`$ yarn add react-native-startup-time`
+
+### Mostly automatic installation
+
+This module supports autolinking so if you use RN 0.60+ then no additional action is required.
+
+Otherwise, run
+
+`$ react-native link react-native-startup-time`
+
+## Usage
+
+```javascript
+import { getTimeSinceStartup } from 'react-native-startup-time';
+
+// somewhere where you app is ready:
+getTimeSinceStartup().then((time) => {
+  console.log(`Time since startup: ${time} ms`);
+});
+```

android/build.gradle

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+apply plugin: 'com.android.library'
+
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
+android {
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
+    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
+
+    defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 16)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
+        versionCode 1
+        versionName "1.0.0"
+    }
+}
+
+dependencies {
+    implementation 'com.facebook.react:react-native:+'
+}

android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.github.doomsower">
+
+</manifest>

android/src/main/java/com/github/doomsower/RNStartupTimeModule.java

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+package com.github.doomsower;
+
+import android.app.Activity;
+import android.os.Build;
+import android.os.SystemClock;
+import android.util.Log;
+
+import com.facebook.react.bridge.Promise;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.module.annotations.ReactModule;
+
+@ReactModule(name = "RNStartupTime")
+public class RNStartupTimeModule extends ReactContextBaseJavaModule {
+    public static final String NAME = "RNStartupTime";
+
+    private final long startMark;
+
+    public RNStartupTimeModule(ReactApplicationContext reactContext, long startMark) {
+        super(reactContext);
+        this.startMark = startMark;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+    @ReactMethod
+    public void getTimeSinceStartup(Promise promise) {
+        int ms = (int) (SystemClock.uptimeMillis() - startMark);
+        Activity activity = getCurrentActivity();
+        if (activity != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+            activity.reportFullyDrawn();
+        }
+        promise.resolve(ms);
+    }
+}

android/src/main/java/com/github/doomsower/RNStartupTimePackage.java

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+package com.github.doomsower;
+
+import android.os.SystemClock;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class RNStartupTimePackage implements ReactPackage {
+    private static final long START_MARK = SystemClock.uptimeMillis();
+
+    @Override
+    public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+        return Arrays.<NativeModule>asList(new RNStartupTimeModule(reactContext, START_MARK));
+    }
+
+    @Override
+    public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+        return Collections.emptyList();
+    }
+}

commitlint.config.js

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+module.exports = { extends: ['@commitlint/config-conventional'] };

example/.buckconfig

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+
+[android]
+  target = Google Inc.:Google APIs:23
+
+[maven_repositories]
+  central = https://repo1.maven.org/maven2

example/.flowconfig

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+[ignore]
+; We fork some components by platform
+.*/*[.]android.js
+
+; Ignore "BUCK" generated dirs
+<PROJECT_ROOT>/\.buckd/
+
+; Ignore unexpected extra "@providesModule"
+.*/node_modules/.*/node_modules/fbjs/.*
+
+; Ignore duplicate module providers
+; For RN Apps installed via npm, "Libraries" folder is inside
+; "node_modules/react-native" but in the source repo it is in the root
+node_modules/react-native/Libraries/react-native/React.js
+
+; Ignore polyfills
+node_modules/react-native/Libraries/polyfills/.*
+
+; These should not be required directly
+; require from fbjs/lib instead: require('fbjs/lib/warning')
+node_modules/warning/.*
+
+; Flow doesn't support platforms
+.*/Libraries/Utilities/HMRLoadingView.js
+
+[untyped]
+.*/node_modules/@react-native-community/cli/.*/.*
+
+[include]
+
+[libs]
+node_modules/react-native/Libraries/react-native/react-native-interface.js
+node_modules/react-native/flow/
+
+[options]
+emoji=true
+
+esproposal.optional_chaining=enable
+esproposal.nullish_coalescing=enable
+
+module.file_ext=.js
+module.file_ext=.json
+module.file_ext=.ios.js
+
+module.system=haste
+module.system.haste.use_name_reducers=true
+# get basename
+module.system.haste.name_reducers='^.*/\([a-zA-Z0-9$_.-]+\.js\(\.flow\)?\)$' -> '\1'
+# strip .js or .js.flow suffix
+module.system.haste.name_reducers='^\(.*\)\.js\(\.flow\)?$' -> '\1'
+# strip .ios suffix
+module.system.haste.name_reducers='^\(.*\)\.ios$' -> '\1'
+module.system.haste.name_reducers='^\(.*\)\.android$' -> '\1'
+module.system.haste.name_reducers='^\(.*\)\.native$' -> '\1'
+module.system.haste.paths.blacklist=.*/__tests__/.*
+module.system.haste.paths.blacklist=.*/__mocks__/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/node_modules/react-native/Libraries/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/node_modules/react-native/RNTester/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/node_modules/react-native/IntegrationTests/.*
+module.system.haste.paths.blacklist=<PROJECT_ROOT>/node_modules/react-native/Libraries/react-native/react-native-implementation.js
+module.system.haste.paths.blacklist=<PROJECT_ROOT>/node_modules/react-native/Libraries/Animated/src/polyfills/.*
+
+munge_underscores=true
+
+module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'
+
+suppress_type=$FlowIssue
+suppress_type=$FlowFixMe
+suppress_type=$FlowFixMeProps
+suppress_type=$FlowFixMeState
+
+suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native\\(_ios\\)?_\\(oss\\|fb\\)[a-z,_]*\\)?)\\)
+suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(<VERSION>\\)? *\\(site=[a-z,_]*react_native\\(_ios\\)?_\\(oss\\|fb\\)[a-z,_]*\\)?)\\)?:? #[0-9]+
+suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
+
+[lints]
+sketchy-null-number=warn
+sketchy-null-mixed=warn
+sketchy-number=warn
+untyped-type-import=warn
+nonstrict-import=warn
+deprecated-type=warn
+unsafe-getters-setters=warn
+inexact-spread=warn
+unnecessary-invariant=warn
+signature-verification-failure=warn
+deprecated-utility=error
+
+[strict]
+deprecated-type
+nonstrict-import
+sketchy-null
+unclear-type
+unsafe-getters-setters
+untyped-import
+untyped-type-import
+
+[version]
+^0.98.0

example/.gitattributes

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+*.pbxproj -text