ci: install dependencies with a single script (#22241)

It's easier if the os-specific installations are done by the script itself

.github/scripts/install_dependencies.cmake

@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.10)
+
+if(APPLE)
+  execute_process(COMMAND brew update --quiet)
+  execute_process(COMMAND brew install automake ninja)
+  if(TEST_DEPS)
+    execute_process(COMMAND brew install cpanminus)
+  endif()
+else()
+  # Assuming ubuntu for now. May expand if required.
+  set(PACKAGES
+    autoconf
+    automake
+    build-essential
+    curl
+    gettext
+    libtool-bin
+    locales-all
+    ninja-build
+    pkg-config
+    unzip)
+  execute_process(COMMAND sudo apt-get update)
+  execute_process(COMMAND sudo apt-get install -y ${PACKAGES})
+  if(TEST_DEPS)
+    execute_process(COMMAND sudo apt-get install -y cpanminus)
+  endif()
+endif()

.github/scripts/install_deps_ubuntu.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-PACKAGES=(
-  autoconf
-  automake
-  build-essential
-  cmake
-  cpanminus
-  curl
-  gettext
-  libtool-bin
-  locales-all
-  ninja-build
-  pkg-config
-  unzip
-)
-
-sudo apt-get update
-sudo apt-get install -y "${PACKAGES[@]}"

.github/workflows/ci.yml

@@ -40,9 +40,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Install apt packages
+      - name: Install dependencies
         run: |
-          ./.github/scripts/install_deps_ubuntu.sh
+          cmake -P ./.github/scripts/install_dependencies.cmake
           sudo apt-get install -y lua-check
 
       - name: Cache uncrustify
@@ -129,10 +129,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Install apt packages
+      - name: Install dependencies
         run: |
           sudo add-apt-repository ppa:neovim-ppa/stable
-          ./.github/scripts/install_deps_ubuntu.sh
+          cmake -P ./.github/scripts/install_dependencies.cmake
           sudo apt-get install -y \
             libluajit-5.1-dev \
             libmsgpack-dev \
@@ -224,15 +224,8 @@ jobs:
       - name: Create log dir
         run: mkdir -p "$LOG_DIR"
 
-      - name: Install apt packages
-        if: runner.os == 'Linux'
-        run: ./.github/scripts/install_deps_ubuntu.sh
-
-      - name: Install brew packages
-        if: runner.os == 'macOS'
-        run: |
-          brew update --quiet
-          brew install automake cpanminus ninja
+      - name: Install dependencies
+        run: cmake -D TEST_DEPS=ON -P ./.github/scripts/install_dependencies.cmake
 
       - name: Setup interpreter packages
         run: |
@@ -370,8 +363,8 @@ jobs:
       - name: Set up environment
         run: echo "$BIN_DIR" >> $GITHUB_PATH
 
-      - name: Install apt packages
-        run: ./.github/scripts/install_deps_ubuntu.sh
+      - name: Install dependencies
+        run: cmake -P ./.github/scripts/install_dependencies.cmake
 
       - name: Install minimum required version of cmake
         run: |

.github/workflows/codeql.yml

@@ -17,8 +17,8 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Install apt packages
-      run: ./.github/scripts/install_deps_ubuntu.sh
+    - name: Install dependencies
+      run: cmake -P ./.github/scripts/install_dependencies.cmake
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2

.github/workflows/coverity.yml

@@ -11,9 +11,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Install dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y autoconf automake build-essential cmake gettext libtool-bin locales ninja-build pkg-config unzip
+        run: cmake -P ./.github/scripts/install_dependencies.cmake
 
       - name: Download Coverity
         run: |