extremely basic prototype

Complete rewrite of pacman database logic && Check if db.lck exists && Create db.lck when the program backups the database and delete it afterwords

Program.cs

@@ -1,22 +0,0 @@
-using System.Diagnostics;
-
-    string homePath;
-    if(Environment.OSVersion.Platform == PlatformID.Unix) {
-        homePath = Environment.GetEnvironmentVariable("HOME");
-    } else {
-        Console.WriteLine("This script doesn't support your operating system.");
-    }
-
-    Process process = new Process();
-
-    ProcessStartInfo processStartInfo = new ProcessStartInfo();
-    //processStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
-    processStartInfo.FileName = @"yay";
-    //processStartInfo.WorkingDirectory = homePath;
-    //processStartInfo.Arguments = "--color";
-    processStartInfo.RedirectStandardOutput = false;
-    processStartInfo.RedirectStandardError = false;
-    processStartInfo.UseShellExecute = true;
-
-    process.StartInfo = processStartInfo;
-    process.Start();

README.md

@@ -1,6 +1,8 @@
 # update-c#
 
 A rewrite of the legendary update script in C#
+
+This time with file handling entirely in C# while keeping all scripting parts in bash.
 ## Authors
 
 - [@ProfessionalUwU](http://192.168.0.69:3000/ProfessionalUwU)
@@ -46,11 +48,20 @@ Run executable
 ```bash
   ./update
 ```
-## Roadmap
+## Roadmap/ToDo
 
 - Figure out how to do options/arguments
-- Backup important files
+- Backup all necessary files
-- Figure out how to make a single executable
+- Hopefully shrink size of the executable
+- Potentially speed up file handling
+- Color output according to state (success = green, failure = red, info = yellow)
+- Option to change backup location (instead of home)
+- Keep backups for a configurable amount of days
+
+## Sites I used to help make this project
+- [dotnetperls](https://dotnetperls.com)
+- [stackoverflow](https://stackoverflow.com/questions/tagged/c%23)
+- [c-sharpcorner](https://www.c-sharpcorner.com)
 ## Contributing
 
 Contributions are always welcome!

justfile

@@ -0,0 +1,31 @@
+default:
+    @just --list
+
+project_name := `printf '%s\n' "${PWD##*/}"`
+uppercase_project_name := capitalize(project_name)
+
+setup:
+    @mkdir src
+    @dotnet new sln --name src/{{project_name}}
+    @dotnet new classlib -o  src/{{uppercase_project_name}}
+    @dotnet new xunit -o src/{{uppercase_project_name}}.Tests
+    @dotnet sln add src/{{uppercase_project_name}}/{{uppercase_project_name}}.csproj
+    @dotnet sln add src/{{uppercase_project_name}}.Tests/{{uppercase_project_name}}.Tests.csproj
+    @dotnet add src/{{uppercase_project_name}}/{{uppercase_project_name}}.csproj reference src/{{uppercase_project_name}}.Tests/{{uppercase_project_name}}.Tests.csproj
+
+run:
+    @dotnet run
+
+build:
+    @dotnet build src/{{uppercase_project_name}}/{{uppercase_project_name}}.csproj
+    @dotnet build src/{{uppercase_project_name}}.Tests/{{uppercase_project_name}}.Tests.csproj
+
+publish:
+    @dotnet publish --configuration Release src/{{uppercase_project_name}}/{{uppercase_project_name}}.csproj
+
+format:
+    @dotnet format src/{{uppercase_project_name}}
+    @dotnet format src/{{uppercase_project_name}}.Tests
+
+test: build
+    @dotnet test src/{{uppercase_project_name}}.Tests

src/Update-csharp.Tests/UnitTest1.cs

@@ -0,0 +1,10 @@
+namespace Update_csharp.Tests;
+
+public class UnitTest1
+{
+    [Fact]
+    public void Test1()
+    {
+
+    }
+}

src/Update-csharp.Tests/Update-csharp.Tests.csproj

@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <RootNamespace>Update_csharp.Tests</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="3.1.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+</Project>

src/Update-csharp.Tests/Usings.cs

@@ -0,0 +1 @@
+global using Xunit;

src/Update-csharp/Program.cs

@@ -0,0 +1,128 @@
+public class Program {
+    static void Main(string[] args) {
+        var exitCommand = "nothing";
+        string backupLocation = "/home/rene/";
+        var pacmanWrapper = "yay";
+        var backupAmount = 2;
+
+        if (args.Length == 0) {
+            beforeUpdate();
+            Console.WriteLine(pacmanWrapper);
+            afterUpdate();
+            return;
+        }
+
+        string arg = args[0].TrimStart('-');;
+        if (args[0].StartsWith("--")) {
+            switch (arg) {
+                case "help":
+                    Console.WriteLine(help());
+                    break;
+                case "preview":
+                    // need to execute 'yay -Sy && yay -Qu'
+                    break;
+                case "version":
+                    Console.WriteLine("version");
+                    break;
+                case "backup":
+                    beforeUpdate();
+                    break;
+                default:
+                    return;
+            }
+            return;
+        }
+
+        beforeUpdate();
+
+        foreach (var option in arg) {
+            switch (option) {
+                case 'f':
+                    // flatpak update -u --noninteractive && flatpak list > "$TMP"/after-backup_"$DATE"/flatpak-after.txt
+                    Console.WriteLine("flatpak update");
+                    break;
+                case 'p':
+                    // "$PACMAN_WRAPPER" && pacman -Qq > "$TMP"/after-backup_"$DATE"/pacman-after.txt
+                    Console.WriteLine(pacmanWrapper);
+                    break;
+                case 'a':
+                    // 'p' && 'f'
+                    Console.WriteLine("flatpak update && " + pacmanWrapper);
+                    break;
+                case 'g':
+                    if (args[0].TrimStart('-') == "g") {
+                        Console.WriteLine(pacmanWrapper);
+                    }
+                    exitCommand = "systemctl -i poweroff";
+                    break;
+                case 'r':
+                    if (args[0].TrimStart('-') == "r") {
+                        Console.WriteLine(pacmanWrapper);
+                    }
+                    exitCommand = "systemctl -i reboot";
+                    break;
+                default:
+                    help();
+                    return;
+            }
+        }
+
+        afterUpdate();
+
+        void readConfig() {
+            backupLocation = "/mnt/Hephaistos/update/";
+            pacmanWrapper = "yay";
+            backupAmount = 2;
+
+            if (!Directory.Exists(backupLocation)) {
+                Console.WriteLine("update-csharp: Backup location does not exist or cannot be reached");
+                return;
+            }
+        }
+
+        //find the amount of backups in the backupLocation and delete the oldest
+        void deleteOldestBackup() {
+            Console.WriteLine(backupAmount);
+        }
+
+        void beforeUpdate() {
+            readConfig();
+            deleteOldestBackup();
+
+            Update.backup("before");
+            Update.zipPacmanDatabase();
+            Update.copyToBackupLocation(backupLocation);
+
+            Console.ForegroundColor = ConsoleColor.Green;
+            Console.WriteLine("pre-backup complete");
+            Console.ResetColor();
+        }
+
+        void afterUpdate() {
+            Update.backup("after");
+            Update.copyToBackupLocation(backupLocation);
+            Directory.Delete("/tmp/update", true);
+
+            Console.ForegroundColor = ConsoleColor.Green;
+            Console.WriteLine("after-backup complete");
+            Console.ResetColor();
+            Console.WriteLine(exitCommand);     // execute exitCommand
+        }
+
+        string help() {
+            string helpMessage = "Usage: update [OPTION]\n";
+            helpMessage += "\noptions:\n";
+            helpMessage += "no flag        same as -p\n";
+            helpMessage += "-f             updates using flatpak update only\n";
+            helpMessage += "-p             updates using a pacman-wrapper only\n";
+            helpMessage += "-a             updates using flatpak update and a pacman-wrapper\n";
+            helpMessage += "-g             shutdowns the computer afterwards\n";
+            helpMessage += "-r             reboots the computer afterwards\n";
+            helpMessage += "--help         displays this message\n";
+            helpMessage += "--preview      shows a preview of which pkg's can be updated\n";
+            helpMessage += "--version      prints out the version number\n";
+            helpMessage += "--backup       just does the pre-backup without updating";
+            return helpMessage;
+        }
+    }
+}

src/Update-csharp/Update-csharp.csproj

@@ -3,12 +3,19 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net7.0</TargetFramework>
+    <RootNamespace>Update_csharp</RootNamespace>
     <PublishSingleFile>true</PublishSingleFile>
     <SelfContained>true</SelfContained>
     <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
-    <PublishReadyToRun>true</PublishReadyToRun>
+    <PublishTrimmed>true</PublishTrimmed>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Update-csharp.Tests\Update-csharp.Tests.csproj" />
+    <Reference Include="System.IO.Compression" />
+    <Reference Include="System.IO.Compression.ZipFile" />
+  </ItemGroup>
+
 </Project>

src/Update-csharp/Update.cs

@@ -0,0 +1,115 @@
+using System.Diagnostics;
+using System.IO.Compression;
+
+public class Update {
+    static string tmpDirectory = "/tmp/update/";
+    public static void backup(string mode) {
+        string backupDir;
+        string pkgList;
+        string flatpakList;
+        List<string> filesToCopy = new List<string>();
+        string zipName;
+
+        switch (mode) {
+            case "before":
+                backupDir = tmpDirectory + "beforeBackup";
+                pkgList = backupDir + "pacman-pre.txt";
+                flatpakList = backupDir + "flatpak-pre.txt";
+                filesToCopy.Add("/etc/fstab");
+                filesToCopy.Add("/etc/makepkg.conf");
+                zipName =  tmpDirectory + "beforeBackup.zip";
+                break;
+            case "after":
+                backupDir = tmpDirectory + "afterBackup";
+                pkgList = backupDir + "pacman-after.txt";
+                flatpakList = backupDir + "flatpak-after.txt";
+                zipName = tmpDirectory + "afterBackup.zip";
+                break;
+            default:
+                throw new ArgumentException("No valid mode was given. Valid modes are before and after");
+        }
+
+        if (Directory.Exists(tmpDirectory)) {
+            Directory.Delete(tmpDirectory, true);
+        }
+        Directory.CreateDirectory(backupDir);
+
+        foreach (var file in filesToCopy) {
+            FileInfo info = new FileInfo(file);
+            string destFile = Path.Combine(backupDir, info.Name);
+            File.Copy(info.FullName, destFile);
+        }
+
+        ZipFile.CreateFromDirectory(backupDir, zipName);
+        Directory.Delete(backupDir, true);
+    }
+
+    public static void copyToBackupLocation(string backupLocation) {
+        foreach (var zip in Directory.GetFiles(tmpDirectory)) {
+            FileInfo info = new FileInfo(zip);
+            string destFile = Path.Combine(backupLocation, info.Name);
+            File.Copy(info.FullName, destFile, true);
+        }
+    }
+
+    public static void zipPacmanDatabase() {
+        string pacmanDatabaseLocation = "/var/lib/pacman/local";
+        string zipName = tmpDirectory + "pacmanDatabase.zip";
+
+        if(dbLockExists()) {
+            throw new ApplicationException("db.lck exists. Please try again later.");
+        }
+        
+        try {
+            lockDatabase();
+        
+            ZipFile.CreateFromDirectory(pacmanDatabaseLocation, zipName);
+        } catch (Exception e) {
+                Console.ForegroundColor = ConsoleColor.Red;
+                Console.WriteLine(e.Message);
+        } finally {
+            unlockDatabase();
+        }
+    }
+
+    private static bool dbLockExists() {
+        if (File.Exists("/var/lib/pacman/db.lck")) {
+            return true;
+        }
+        return false;
+    }
+
+    private static void lockDatabase() {
+        var psi = new ProcessStartInfo
+            {
+                FileName = "/bin/bash",
+                UseShellExecute = false,
+                RedirectStandardOutput = true,
+                Arguments = string.Format("-c \"cd /var/lib/pacman/ && sudo touch db.lck && sudo chmod 000 db.lck\"")
+            };
+
+        using (var p = Process.Start(psi))
+        {
+            if (p != null)
+            {
+                var strOutput = p.StandardOutput.ReadToEnd();
+                p.WaitForExit();
+            }
+        }
+    }
+
+    private static void unlockDatabase() {
+        var psi = new ProcessStartInfo {
+            FileName = "/bin/bash",
+            UseShellExecute = false,
+            RedirectStandardOutput = true,
+            Arguments = string.Format("-c \"cd /var/lib/pacman/ && sudo rm -f db.lck\"")
+        };
+        using (var p = Process.Start(psi)) {
+            if (p != null) {
+                var strOutput = p.StandardOutput.ReadToEnd();
+                p.WaitForExit();
+            }
+        }
+    }
+}

src/update-csharp.sln

@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Update-csharp", "Update-csharp\Update-csharp.csproj", "{6FE9BE72-7118-4CC5-AC47-20F5E145FA67}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Update-csharp.Tests", "Update-csharp.Tests\Update-csharp.Tests.csproj", "{F66860FA-9516-458E-87F3-245AC885AB96}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6FE9BE72-7118-4CC5-AC47-20F5E145FA67}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6FE9BE72-7118-4CC5-AC47-20F5E145FA67}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6FE9BE72-7118-4CC5-AC47-20F5E145FA67}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6FE9BE72-7118-4CC5-AC47-20F5E145FA67}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F66860FA-9516-458E-87F3-245AC885AB96}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F66860FA-9516-458E-87F3-245AC885AB96}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F66860FA-9516-458E-87F3-245AC885AB96}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F66860FA-9516-458E-87F3-245AC885AB96}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal