Trigger ci build by comment

.github/workflows/android-ci.yml

@@ -7,14 +7,14 @@ env:
   TRAVIS_OS_NAME: linux
   BUILD_TARGET: android
   # Simple let github action to build all (TODO: optimize in the future)
-  TRAVIS_PULL_REQUEST: false
+  TRAVIS_PULL_REQUEST: true
   BUILD_TYPE: Release
   GITHUB_CI: true
   PYENV_VERSION: 2.7.18
 
 jobs:
   build:
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
+    if: "contains(github.event.commits[0].message, '[ci build]')"
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.

.github/workflows/ios-ci.yml

@@ -7,13 +7,13 @@ env:
   TRAVIS_OS_NAME: osx
   BUILD_TARGET: ios
   # Simple let github action to build all (TODO: optimize in the future)
-  TRAVIS_PULL_REQUEST: false
+  TRAVIS_PULL_REQUEST: true
   BUILD_TYPE: Release
   GITHUB_CI: true
 
 jobs:
   build:
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
+    if: "contains(github.event.commits[0].message, '[ci build]')"
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.

.github/workflows/linux-ci.yml

@@ -7,13 +7,13 @@ env:
   TRAVIS_OS_NAME: linux
   BUILD_TARGET: linux
   # Simple let github action to build all (TODO: optimize in the future)
-  TRAVIS_PULL_REQUEST: false
+  TRAVIS_PULL_REQUEST: true
   BUILD_TYPE: Release
   GITHUB_CI: true
 
 jobs:
   build:
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
+    if: "contains(github.event.commits[0].message, '[ci build]')"
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.

.github/workflows/osx-ci.yml

@@ -13,7 +13,7 @@ env:
 
 jobs:
   build:
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
+    if: "contains(github.event.commits[0].message, '[ci build]')"
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.

.github/workflows/pr-ci.yml

@@ -12,7 +12,6 @@ env:
 jobs:
   build-win32:
     name: build-win32
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v2
@@ -29,7 +28,6 @@ jobs:
 
   build-linux:
     name: build-linux
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-18.04
     env:
       TRAVIS_OS_NAME: linux
@@ -45,7 +43,6 @@ jobs:
 
   build-android:
     name: build-android
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: ubuntu-16.04
     env:
       TRAVIS_OS_NAME: linux
@@ -62,7 +59,6 @@ jobs:
 
   build-osx:
     name: build-osx
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: macos-latest
     env:
       TRAVIS_OS_NAME: osx
@@ -78,7 +74,6 @@ jobs:
  
   build-ios:
     name: build-ios
-    if: "!contains(github.event.commits[0].message, '[skip ci]')"
     runs-on: macos-latest
     env:
       TRAVIS_OS_NAME: osx

.github/workflows/win32-ci.yml

@@ -5,11 +5,10 @@ on: [push]
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
-  TRAVIS_PULL_REQUEST: false
 
 jobs:
   build:
-    if: "!contains(github.event.commits[0].message, '[skip ci]') && contains(github.event.commits[0].message, 'Merge pull request')"
+    if: "contains(github.event.commits[0].message, '[ci build]')"
     # The CMake configure and build commands are platform agnostic and should work equally
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.