epm: add desktop manager (eterbug #17617)

bin/epm

@@ -475,6 +475,11 @@ check_command()
         epm_cmd=create-fake
         direct_args=1
         ;;
+    desktop)
+        epm_cmd=desktop
+        direct_args=1
+        ;;
+
     -V|checkpkg|integrity)    # HELPCMD: check package file integrity (checksum)
         epm_cmd=checkpkg
         ;;

bin/epm-desktop

+#!/bin/sh
+#
+# Copyright (C) 2024  Etersoft
+# Copyright (C) 2024  Ivan Mazhukin <vanomj@etersoft.ru>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+json=0
+
+is_de_exist() {
+    local json_file="$(realpath $epm_vardir/desktop.d/$1.json)"
+    local de_name=$1
+
+    if [ -f "$json_file" ]; then
+        return 0 
+    else
+        message "Error: Manifest for '$de_name' not found."
+        exit 1  
+    fi
+}
+
+copy_files_if_absent() {
+    local source_dir="$CONFIGDIR/desktop.d/"
+    local target_dir="$epm_vardir/desktop.d"
+
+    sudorun mkdir -p "$target_dir"
+
+    for file in "$source_dir"/*.json; do
+        filename=$(basename "$file")
+        target_file="$target_dir/$filename"
+
+        if [ ! -f "$target_file" ]; then
+           sudorun cp "$file" "$target_file"
+        fi
+    done
+}
+
+check_installed_des() {
+    for json_file in $epm_vardir/desktop.d/*.json; do
+        de_name=$(basename "$json_file" .json)
+        dependencies=$(get_value "$de_name" "dependencies")
+        
+        is_installed "$dependencies" && status=true || status=false
+        update_installed_status $de_name $status
+    done
+}
+
+is_installed() {
+    local dependencies=$1
+    epm installed $dependencies > /dev/null 2>&1
+    return
+}
+
+check_and_update_version() {
+    for json_file in $epm_vardir/desktop.d/*.json; do
+        de_name=$(basename "$json_file" .json)
+        main_package=$(get_value "$de_name" dependencies | awk '{print $1}')
+        
+        current_version=$(get_value "$de_name" version)
+        repo_version=$(get_repo_version "$main_package")
+
+        if [ "$repo_version" != "Version unchanged" ] && [ -n "$repo_version" ] && [ "$repo_version" != "$current_version" ]; then
+            update_json_version "$de_name" "$repo_version"
+        fi
+
+    done
+}
+
+update_installed_status() {
+    local de_name=$1
+    local status=$2
+    local json_file="$(realpath $epm_vardir/desktop.d/$de_name.json)"
+
+ 
+    sudorun sed -i "s/\"installed\": .*/\"installed\": $status,/" "$json_file"
+}
+
+update_json_version() {
+    local de_name=$1
+    local new_version=$2
+    local json_file="$epm_vardir/desktop.d/$de_name.json"
+
+    sudorun sed -i "s/\"version\": \".*\"/\"version\": \"$new_version\"/" "$json_file"
+}
+
+get_value() {
+    local json_file="$(realpath $epm_vardir/desktop.d/$1.json)"
+    local key="$2"
+
+    if [ "$key" = "description" ]; then
+        cat "$json_file" | epm --quiet tool json -b  | grep "\[\"$key\"" | cut -d ' ' -f2- | sed 's/[",]//g'
+    else
+        cat "$json_file" | epm --quiet tool json -b  | grep "\[\"$key\"" | awk '{print $2}' | sed 's/[",]//g' | tr '\n' ' '
+    fi
+}
+
+get_repo_version() {
+    local package_name=$1
+    local latest_version
+
+    latest_version=$(eget --quiet -O- "https://rdb.altlinux.org/api/package/package_info?name=$package_name&arch=x86_64&source=false&branch=sisyphus&full=false" \
+        | epm --quiet tool json -b | grep '"packages",0,"version"]' | awk '{print $2}' | tr -d '"')
+
+    if [ -n "$latest_version" ]; then
+        echo "$latest_version"
+    else
+        latest_version=$(epm --quiet info $package_name | grep 'Version:' | awk '{print $2}' | sed 's/-.*//') 
+
+        if [ -n "$latest_version" ]; then
+            echo "$latest_version"
+        else
+            echo "Version unchanged"
+        fi
+    fi
+}
+
+install_de() {
+    local de_name=$1
+
+    dependencies=$(get_value "$de_name" "dependencies")
+
+    if is_installed "$dependencies"; then
+        message "$de_name is already installed."
+        return 0
+    fi
+
+    message "Installing $de_name with dependencies: $dependencies"
+    
+    if epm install $dependencies; then
+        message "$de_name successfully installed."
+        update_installed_status "$de_name" true
+    else
+        message "Failed to install $de_name."
+        return 1
+    fi
+}
+
+remove_de() {
+    local de_name=$1
+
+    dependencies=$(get_value "$de_name" "dependencies")
+
+    if ! is_installed "$dependencies"; then
+        message "$de_name is not installed."
+        return 0
+    fi
+
+    message "Removing $de_name with dependencies: $dependencies"
+
+    if epm remove $dependencies; then
+        message "$de_name successfully removed."
+        update_installed_status "$de_name" false
+    else
+        message "Failed to remove $de_name."
+        return 1
+    fi
+}
+
+get_de_info() {
+    local de_name=$1
+    message "   Information for $de_name:
+    Name: $(get_value $de_name name)
+    Version: $(get_value $de_name version)
+    Installed: $(get_value $de_name installed)
+    Description: $(get_value $de_name description)"
+}
+
+list_des() {
+    if [ "$json" -eq 1 ]; then
+        echo '['
+        first=1
+        for de in $epm_vardir/desktop.d/*.json; do
+            if [ $first -eq 1 ]; then
+                first=0
+            else
+                echo ','
+            fi
+            cat "$de"
+        done
+        echo ']'
+    else
+        for de in $epm_vardir/desktop.d/*.json; do
+            basename "$de" .json
+        done
+    fi
+}
+
+show_help() {
+    message 'Usage: epm desktop [command]
+Commands:
+    install [de_name]    Install a desktop environment
+    remove [de_name]     Remove a desktop environment
+    info [de_name]       Get information about a desktop environment
+    list                 List all available desktop environments'
+}
+
+epm_desktop() {
+    copy_files_if_absent
+
+    check_installed_des
+    check_and_update_version
+
+    case "$2" in
+        --json)
+            json=1
+            ;;
+    esac
+
+    case "$1" in
+        install)
+            is_de_exist "$2"
+            install_de "$2"
+            ;;
+        remove)
+            is_de_exist "$2"
+            remove_de "$2"
+            ;;
+        info)
+            is_de_exist "$2"
+            get_de_info "$2"
+            ;;
+        list)
+            list_des
+            ;;
+        *)
+            show_help
+            ;;
+    esac
+}

desktop.d/gnome.json

+{
+    "name": "GNOME",
+    "version": "46.4",
+    "installed": false,
+    "dependencies": ["gnome-shell", "gdm"],
+    "description": "Window management and application launching for GNOME"
+}
+  
\ No newline at end of file

desktop.d/hyprland.json

+{
+    "name": "Hyprland",
+    "version": "0.42.0",
+    "installed": false,
+    "dependencies": [ "hyprland", "kitty", "waybar", "wlogout", "fonts-ttf-fira-code-nerd", "hyprpaper", "hyprshot", "wofi", "pwvucontrol", "cliphist", "polkit-gnome"],
+    "description": "Hyprland is a dynamic tiling Wayland compositor that doesn't sacrifice on its looks"
+}
+  
\ No newline at end of file

etc/desktop.d

+../desktop.d
\ No newline at end of file