Merge pull request #27 from NickvisionApps/sysdirs

Add SystemDirectories

Nickvision.Aura.Tests/SystemDirectoriesTest.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+
+namespace Nickvision.Aura.Tests;
+
+public class SystemDirectoriesTest
+{
+    [Fact]
+    public void Path()
+    {
+        var path = new []{ "test0", "test1" };
+        Environment.SetEnvironmentVariable("PATH", string.Join(RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? ";" : ":", path));
+        Assert.True(SystemDirectories.Path.SequenceEqual(path));
+    }
+
+    [Fact]
+    public void Config()
+    {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+        {
+            Assert.True(SystemDirectories.Config.Length == 0);
+        }
+        var config = new []{ "test0", "test1" };
+        Environment.SetEnvironmentVariable("XDG_CONFIG_DIRS", string.Join(":", config));
+        Assert.True(SystemDirectories.Config.SequenceEqual(config));
+    }
+
+    [Fact]
+    public void Data()
+    {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+        {
+            Assert.True(SystemDirectories.Data.Length == 0);
+        }
+        var data = new []{ "test0", "test1" };
+        Environment.SetEnvironmentVariable("XDG_DATA_DIRS", string.Join(":", data));
+        Assert.True(SystemDirectories.Data.SequenceEqual(data));
+    }
+}

Nickvision.Aura/SystemDirectories.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+
+namespace Nickvision.Aura;
+
+/// <summary>
+/// System directories paths
+/// </summary>
+public class SystemDirectories {
+    private static string[]? _path;
+    private static string[]? _config;
+    private static string[]? _data;
+
+    /// <summary>
+    /// Array of paths from PATH variable
+    /// </summary>
+    public static string[] Path
+    {
+        get
+        {
+            _path ??= Environment.GetEnvironmentVariable("PATH")?.Split(RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? ';' : ':').ToArray() ?? Array.Empty<string>();
+            return _path;
+        }
+    }
+
+    /// <summary>
+    /// Array of paths from XDG_CONFIG_DIRS
+    /// </summary>
+    /// <remarks>Returns empty array when accessed not on Linux</remarks>
+    public static string[] Config
+    {
+        get
+        {
+            if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                return Array.Empty<string>();
+            }
+            _config ??= Environment.GetEnvironmentVariable("XDG_CONFIG_DIRS")?.Split(':').ToArray() ?? Array.Empty<string>();
+            return _config;
+        }
+    }
+
+    /// <summary>
+    /// Array of paths from XDG_DATA_DIRS
+    /// </summary>
+    /// <remarks>Returns empty array when accessed not on Linux</remarks>
+    public static string[] Data
+    {
+        get
+        {
+            if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                return Array.Empty<string>();
+            }
+            _data ??= Environment.GetEnvironmentVariable("XDG_DATA_DIRS")?.Split(':').ToArray() ?? Array.Empty<string>();
+            return _data;
+        }
+    }
+}