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.gitignore

@@ -1 +1,8 @@
-.idea
+.idea
+.vscode
+.vscode/launch.json
+
+bin
+
+obj
+

proj/omnisharp.json

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+{
+  "script": {
+    "enableScriptNuGetReferences": true,
+    "defaultTargetFramework": "net6.0"
+  }
+}

proj/please_formatter.cs

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+#!/usr/bin/env dotnet-script
+
+using System.Text.RegularExpressions;
+
+ProcessDirectory(Directory.GetCurrentDirectory());
+
+void ProcessDirectory(string baseDir) {
+    foreach (var subDir in Directory.EnumerateFileSystemEntries(baseDir))
+    {
+        var fs = Path.Combine(baseDir, subDir);
+        if (File.Exists(fs))
+        {
+            if (Path.GetFileName(fs) == "BUILD")
+            {
+                Console.WriteLine();
+                Console.WriteLine(fs);
+                Console.WriteLine("======== ======== ======== ======== ======== ======== ======== ========");
+                FormatBuildFile(fs);
+                Console.WriteLine("======== ======== ======== ======== ======== ======== ======== ========");
+                Console.WriteLine();
+            }
+        } 
+        else if (Directory.Exists(fs))
+        {
+            ProcessDirectory(fs);
+        }
+    }
+}
+
+void FormatBuildFile(string filename)
+{
+    var oldcontent = File.ReadAllText(filename);
+    var newcontent = FormatFile(filename, oldcontent);
+
+    if (oldcontent != newcontent)
+    {
+        //File.WriteAllText(filename, newcontent);
+        Console.WriteLine("Auto-Formatted file :: " + filename);
+    }
+}
+
+string FormatFile(string filename, string content)
+{
+    var depsRex = new Regex(@"^\s*deps\s*=\s*\[(\s*\n)?(?<deps>[^\]\)]+?)[\s\r\n]*\]", RegexOptions.Multiline);    
+    
+    var matches = depsRex.Matches(content);
+
+    foreach (Match m in matches)
+    {
+        var oldDeps = m.Groups["deps"].Value;
+        if (string.IsNullOrWhiteSpace(oldDeps)) continue;
+        
+        var linenum = 1 + content[..m.Groups["deps"].Index].AsEnumerable().Count(p => p == '\n');
+        
+        var newDeps = FormatDeps(filename, linenum, oldDeps);
+
+        if (oldDeps != newDeps)
+        {
+            Console.WriteLine("+++++++++++++ OLD +++++++++++++++++");
+            Console.WriteLine(oldDeps);
+            Console.WriteLine("++++++++++++++ NEW ++++++++++++++++");
+            Console.WriteLine(newDeps);
+            Console.WriteLine("++++++++++++++++++++++++++++++");
+            Console.WriteLine();
+        }
+    }
+    
+    return content;
+}
+
+string FormatDeps(string filename, int linenum, string deps)
+{
+    var lines = deps.Split("\n");
+    if (lines.Length == 0) return deps;
+
+    var allindents = lines.Where(l => !string.IsNullOrWhiteSpace(l)).Select(l => l.Length - l.TrimStart().Length).Distinct().ToList();
+    if (allindents.Count != 1)
+    {
+        throw new Exception($"Different deps-indents in file {filename}:{linenum} ( [ {string.Join(", ", allindents)} ] )");
+    }
+
+    var indent = new string(' ',  allindents[0]);
+
+    var result = lines.
+        Where(p => !string.IsNullOrWhiteSpace(p)).
+        Select(p => GetDepGroup(filename, linenum, p)).
+        GroupBy(p => p.group).
+        OrderBy(p => p.Key).
+        SelectMany(p => p.OrderBy(q => q.clean).Select(q => $"{indent}\"{q.clean}\",").Append("")).
+        Aggregate((a, b) => a + "\n" + b);
+
+    return result;
+}
+
+(int group, string clean, string raw) GetDepGroup(string filename, int linenum, string value)
+{
+    var v = value.Trim();
+
+    var rowA = v.Length > 3 && v[0] == '"' && v[^2] == '"' && v[^1] == ',';
+    var rowB = v.Length > 2 && v[0] == '"' && v[^1] == '"';
+    
+    if (!rowA && !rowB) throw new Exception($"Invalid Dependency in file {filename}:{linenum} => '{v}'");
+
+    if (rowA)
+    {
+        v = v.Substring(1, v.Length - 4);
+    } 
+    else if (rowB)
+    {
+        v = v.Substring(1, v.Length - 3);
+    }
+
+    v = v.Trim();
+    
+    //TODO group
+    
+    return (0, v, value);
+}

proj/proj.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net6.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <RootNamespace>X</RootNamespace>
+    </PropertyGroup>
+
+</Project>