meson.build: update

Added new version that aligns with mkinitfs, added zlevis-mkinitfs
script.

meson.build

@@ -1,18 +1,20 @@
 # Project definition
-project('zlevis-mkinitfs', license: 'GPL-2.0-only')
+project('zlevis-mkinitfs', license: 'GPL-2.0-only', version: '3.12')
 
-# Define mkinitfs features and data dir
+# Define bin, mkinitfs features and data dir
+bin_dir = join_paths(get_option('prefix'), get_option('bindir'))
 features_dir = '/etc/mkinitfs/features.d/'
-data_dir = '/usr/share/mkinitfs/'
+data_dir = '/usr/share/zlevis-mkinitfs/'
 
 # Define features and data list
 features = []
 data = []
 
-# Define subdir with features and subdir with data
+# Define subdir with src, subdir with features and subdir with data
+subdir('src')
 subdir('features')
 subdir('data')
 
 # Install features in features dir and data in data dir
 install_data(features, install_dir: features_dir)
-install_data(data, install_dir: data_dir)
+install_data(data, install_dir: data_dir)

src/meson.build

@@ -0,0 +1,14 @@
+# Find the script
+script = find_program(meson.current_source_dir(), 'zlevis-mkinitfs.in')
+
+# Test the script
+test('zlevis-mkinitfs.in', script, args: '--summary')
+
+# Configure script
+configure_file(
+  input: 'zlevis-mkinitfs.in',
+  output: 'zlevis-mkinitfs',
+  configuration: {'VERSION': meson.project_version()},
+  install: true,
+  install_dir: bin_dir
+)

src/zlevis-mkinitfs.in

@@ -0,0 +1,103 @@
+#!/bin/sh
+
+# Exit immediately if a command exits with a non-zero status
+set -e
+
+# Summary of the functionality of zlevis-mkinitfs
+summary="A tool that implements zlevis into mkinitfs"
+
+# Version of zlevis-mkinitfs
+version="@VERSION@"
+
+# Display summary
+if [ "$1" = "--summary" ]; then
+    echo "$summary"
+    exit 0
+fi
+
+# Display version
+if [ "$1" = "--version" ]; then
+    echo "$version"
+    exit 0
+fi
+
+# Function to display usage information of zlevis-mkinitfs
+info() {
+    exec >&2
+    echo "Usage: \"zlevis-mkinitfs {install|uninstall}\""
+    exit 2
+}
+
+# Define locations
+loc_zlevis_mkinitfs="/usr/share/zlevis-mkinitfs"
+loc_mkinitfs="/usr/share/mkinitfs"
+loc_conf="/etc/mkinitfs/mkinitfs.conf"
+
+# Function to install zlevis into mkinitfs
+install() {
+    if [ -f "${loc_zlevis_mkinitfs}/initramfs-init" ]; then
+        continue
+    else
+        echo "cannot install zlevis-mkinitfs: zlevis-mkinitfs not present on system"
+        exit 1
+    fi
+
+    if [ -f "${loc_mkinitfs}/initramfs-init" ]; then
+        continue
+    else
+        echo "cannot install zlevis-mkinitfs: mkinitfs not present on system"
+        exit 1
+    fi
+    
+    cp "${loc_mkinitfs}/initramfs-init" "${loc_mkinitfs}/initramfs-init.bak"
+    echo "cp: ${loc_mkinitfs}/initramfs-init to ${loc_mkinitfs}/initramfs-init.bak"
+    
+    cp "${loc_zlevis_mkinitfs}/initramfs-init" "${loc_mkinitfs}/initramfs-init"
+    echo "cp: ${loc_zlevis_mkinitfs}/initramfs-init to ${loc_mkinitfs}/initramfs-init"
+    
+    if grep -q "^features=" "$loc_conf"; then
+        if grep -q "^features=.*zlevis" "$loc_conf"; then
+            echo "zlevis is already in features"
+            exit 0
+        else
+            sed -i '/^features=/s/"$/ zlevis"/' "$loc_conf"
+            echo "zlevis has been added to features"
+            exit 0
+        fi
+    else
+        echo "partially installed zlevis-mkinitfs: mkinitfs features does not exist"
+        exit 1
+    fi
+}
+
+# Function to uninstall zlevis from mkinitfs
+uninstall() {
+    if [ -f "${loc_mkinitfs}/initramfs-init.bak" ]; then
+        mv "${loc_mkinitfs}/initramfs-init.bak" "${loc_mkinitfs}/initramfs-init"
+        echo "mv: ${loc_mkinitfs}/initramfs-init.bak to ${loc_mkinitfs}/initramfs-init"
+        
+        if grep -q "^features=" "$loc_conf"; then
+            if grep -q "^features=.*zlevis" "$loc_conf"; then
+                sed -i '/^features=/s/ zlevis//g' "${loc_conf}"
+                echo "zlevis has been removed from features"
+                exit 0
+            else
+                echo "cannot remove zlevis from features: zlevis not present"
+                exit 2
+            fi
+        else
+            echo "uninstalled zlevis-mkinitfs: mkinitfs features does not exist"
+            exit 2
+        fi  
+    else
+        echo "cannot uninstall zlevis-mkinitfs: zlevis-mkinitfs not installed"
+        exit 2
+    fi
+}
+
+# Determine the argument path and execute the relevant function
+case "$1" in
+    "install") install;;
+    "uninstall") uninstall;;
+    *) info;;
+esac