[DOC] Skip tests if only documents change [ci skip]

Run only checks for source code.  Currently, our CIs do almost
nothing about the documents.

.appveyor.yml

@@ -11,6 +11,7 @@ clone_depth: 10
 platform:
   - x64
 skip_commits:
+  message: /^\[DOC\]/
   files:
     - doc/*
     - '**/*.md'

.github/workflows/baseruby.yml

@@ -20,6 +20,7 @@ jobs:
   baseruby:
     name: BASERUBY
     runs-on: ubuntu-20.04
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     strategy:
       matrix:
         ruby:

.github/workflows/check_dependencies.yml

@@ -22,6 +22,7 @@ jobs:
         os: [ubuntu-20.04]
       fail-fast: true
     runs-on: ${{ matrix.os }}
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - name: Install libraries
         run: |

.github/workflows/codeql-analysis.yml

@@ -23,6 +23,7 @@ jobs:
 
     # CodeQL runs on ubuntu-latest and windows-latest
     runs-on: ubuntu-latest
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
 
     env:
       enable_install_doc: no

.github/workflows/compilers.yml

@@ -188,6 +188,7 @@ jobs:
     container:
       image: ghcr.io/ruby/ruby-ci-image:${{ matrix.entry.container || 'clang-14' }}
       options: --user root
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - run: id
         working-directory:

.github/workflows/mingw.yml

@@ -42,6 +42,7 @@ jobs:
             base_ruby: head
             test_task: [ "check" ] # to make job names consistent
       fail-fast: false
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - run: mkdir build
         working-directory:

.github/workflows/mjit.yml

@@ -23,6 +23,7 @@ jobs:
         jit_opts: [ "--mjit", "--mjit-wait" ]
       fail-fast: false
     runs-on: ubuntu-latest
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     env:
       TESTOPTS: '-q --tty=no'
       RUN_OPTS: '--disable-gems ${{ matrix.jit_opts }} --mjit-debug=-ggdb3'

.github/workflows/spec_guards.yml

@@ -20,6 +20,7 @@ jobs:
   rubyspec:
     name: Rubyspec
     runs-on: ubuntu-20.04
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     strategy:
       matrix:
         # Specs from ruby/spec should still run on all supported Ruby versions.

.github/workflows/ubuntu.yml

@@ -36,6 +36,7 @@ jobs:
       GITPULLOPTIONS: --no-tags origin ${{github.ref}}
       RUBY_DEBUG: ci
     runs-on: ${{ matrix.os }}
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - run: mkdir build
         working-directory:

.github/workflows/windows.yml

@@ -28,6 +28,7 @@ jobs:
           #   vcvars: '"C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"'
       fail-fast: false
     runs-on: ${{ matrix.os }}
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     name: VisualStudio ${{ matrix.vs }}
     env:
       GITPULLOPTIONS: --no-tags origin ${{github.ref}}

.github/workflows/yjit-ubuntu.yml

@@ -43,6 +43,7 @@ jobs:
       RUN_OPTS: ${{ matrix.yjit_opts }}
       RUBY_DEBUG: ci
     runs-on: ${{ matrix.os }}
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - run: mkdir build
         working-directory:

.github/workflows/yjit_asm_tests.yml

@@ -19,6 +19,7 @@ concurrency:
 jobs:
   test:
     runs-on: ubuntu-latest
+    if: ${{ !startsWith(github.event.head_commit.message, '[DOC]') }}
     steps:
       - name: Install dependencies
         run: |

.travis.yml

@@ -13,6 +13,8 @@ language: c
 
 os: linux
 
+if: commit_message !~ /^\[DOC\]/
+
 dist: focal
 
 git: