meson: Detect Linux distro and choose an appropriate init style, GitHub

#1270

.github/workflows/build.yml

@@ -119,7 +119,6 @@ jobs:
         run: |
           meson setup build \
             -Dwith-appletalk=true \
-            -Dwith-init-style=openrc \
             -Dwith-tests=true
       - name: Build
         run: meson compile -C build
@@ -162,7 +161,6 @@ jobs:
             -Dwith-appletalk=true \
             -Dwith-docbook-path=/usr/share/xml/docbook/xsl-stylesheets-1.79.2 \
             -Dwith-init-hooks=false \
-            -Dwith-init-style=systemd \
             -Dwith-tests=true
       - name: Build
         run: meson compile -C build
@@ -246,7 +244,6 @@ jobs:
           meson setup build \
             -Dwith-appletalk=true \
             -Dwith-init-hooks=false \
-            -Dwith-init-style=systemd \
             -Dwith-tests=true
       - name: Build
         run: meson compile -C build
@@ -303,7 +300,6 @@ jobs:
             -Dwith-appletalk=true \
             -Dwith-docbook-path=/usr/share/xml/docbook/stylesheet/nwalsh/1.79.2 \
             -Dwith-init-hooks=false \
-            -Dwith-init-style=systemd \
             -Dwith-tests=true
       - name: Build
         run: meson compile -C build

meson.build

@@ -29,6 +29,32 @@ cpu = host_machine.cpu_family()
 host_os = host_machine.system()
 target_os = target_machine.system()
 
+linux_distro = ''
+
+if host_os == 'linux' and fs.exists('/etc/os-release')
+    os_release = fs.read('/etc/os-release').strip()
+    if os_release.contains('alpine')
+        linux_distro = 'alpine'
+    elif os_release.contains('arch')
+        linux_distro = 'arch'
+    elif os_release.contains('centos')
+        linux_distro = 'centos'
+    elif os_release.contains('gentoo')
+        linux_distro = 'gentoo'
+    elif os_release.contains('suse')
+        linux_distro = 'suse'
+    elif os_release.contains('fedora')
+        linux_distro = 'fedora'
+    elif os_release.contains('rhel')
+        linux_distro = 'rhel'
+    elif os_release.contains('ubuntu')
+        linux_distro = 'ubuntu'
+    elif os_release.contains('debian')
+        linux_distro = 'debian'
+    endif
+    message('Linux distro detected: ' + linux_distro)
+endif
+
 #########
 # Paths #
 #########
@@ -1955,8 +1981,12 @@ init_style = get_option('with-init-style')
 init_dirs = []
 
 if 'auto' in init_style
-    if uname_stdout.to_lower().contains('debian') or uname_stdout.to_lower().contains('ubuntu')
-        init_style = ['systemd']
+    if host_os == 'linux'
+        if linux_distro in ['arch', 'centos', 'debian', 'fedora', 'rhel', 'suse', 'ubuntu']
+            init_style = ['systemd']
+        elif linux_distro in ['alpine', 'gentoo']
+            init_style = ['openrc']
+        endif
     elif host_os == 'freebsd'
         init_style = ['freebsd']
     elif host_os == 'netbsd'