WIP

tests/FSharp.Compiler.Service.Tests2/Big.fs

@@ -0,0 +1,40 @@
+module FSharp.Compiler.Service.Tests.Big
+
+module A1 = let a = 3
+module A2 = let a = 3
+module A3 = let a = 3
+module A4 =
+
+    type AAttribute(name : string) =
+        inherit System.Attribute()
+
+    let a = 3
+    module A1 =
+        let a = 3
+    type X = int * int
+    type Y = Y of int
+
+module B =
+    open A2
+    let b = [|
+        A1.a
+        A2.a
+        A3.a
+    |]
+    let c : A4.X = 2,2
+    [<A4.A("name")>]
+    let d : A4.Y = A4.Y 2
+    type Z =
+        {
+            X : A4.X
+            Y : A4.Y
+        }
+
+let c = A4.a
+let d = A4.A1.a
+open A4
+let e = A1.a
+open A1
+let f = a
+
+//module X = B

tests/FSharp.Compiler.Service.Tests2/DepResolving.fs

@@ -0,0 +1,175 @@
+module FSharp.Compiler.Service.Tests.DepResolving
+
+open FSharp.Compiler.Service.Tests2.SyntaxTreeTests.TypeTests
+open FSharp.Compiler.Syntax
+open NUnit.Framework
+
+/// File * AST
+type FileAST = string * ParsedInput
+
+type List<'a> = System.Collections.Generic.List<'a>
+
+type Node =
+    {
+        Name : string
+        AST : ParsedInput
+        Top : LongIdent
+        ModuleRefs : LongIdent[]
+    }
+
+/// Filenames with dependencies
+type Graph = (Node * List<Node>)[]
+
+let extractModuleSegments (stuff : Stuff) : LongIdent[] =
+    stuff
+    |> Seq.choose (fun x ->
+        match x.Kind with
+        | ModuleOrNamespace -> x.Ident |> Some
+        | Type ->
+            match x.Ident.Length with
+            | 0
+            | 1 -> None
+            | n -> x.Ident.GetSlice(Some 0, n - 1 |> Some) |> Some
+    )
+    |> Seq.toArray
+
+type ModuleSegment = string
+
+type TrieNode =
+    {
+        // parent?
+        // TODO Use ValueTuples if not already
+        Children : System.Collections.Generic.IDictionary<ModuleSegment, TrieNode>
+        mutable Reachable : bool
+        /// Files/graph nodes represented by this TrieNode
+        /// All files whose top-level module/namespace are same as this TrieNode's 'path'
+        GraphNodes : System.Collections.Generic.List<Node>
+    }
+
+let emptyList<'a> () =
+    System.Collections.Generic.List<'a>()
+
+let cloneTrie (trie : TrieNode) : TrieNode =
+    failwith unsupported // TODO
+
+let emptyTrie () : TrieNode =
+    {
+        TrieNode.Children = dict([])
+        Reachable = false
+        GraphNodes = emptyList()
+    }
+
+/// Build initial Trie from files
+let buildTrie (nodes : Node[]) : TrieNode =
+    let root = emptyTrie()
+
+    // Add every file
+    let addItem (node : Node) =
+        let ident = node.Top
+
+        let mutable trieNode = root
+        // Go through module segments, possibly extending the Trie with new nodes
+        for segment in ident do
+            let child =
+                match trieNode.Children.TryGetValue segment.idText with
+                // Child exists
+                | true, child ->
+                    child
+                // Child doesn't exist
+                | false, _ ->
+                    let child = emptyTrie()
+                    trieNode.Children[segment.idText] <- child
+                    child
+            trieNode <- child
+
+        // Add the node to the found leaf's list
+        trieNode.GraphNodes.Add(node)
+
+    // Add all files to the Trie
+    nodes
+    |> Array.iter addItem
+
+    root
+
+let search (trie : TrieNode) (path : LongIdent) =
+    trie
+
+let algorithm (nodes : FileAST list) : Graph =
+    // Create ASTs, extract module refs
+    let nodes =
+        nodes
+        |> List.map (fun (name, ast) ->
+            let typeAndModuleRefs = visit ast 
+            let top = topModuleOrNamespace ast
+            let moduleRefs = extractModuleSegments typeAndModuleRefs
+            {
+                Name = name
+                AST = ast
+                Top = top
+                ModuleRefs = moduleRefs
+            }
+        )
+        |> List.toArray
+
+    let trie = buildTrie nodes
+
+    // Find dependencies for all files (can be in parallel)
+    nodes
+    |> Array.map (fun node ->
+        let trie = cloneTrie trie
+
+        // Keep a list of reachable nodes
+        let reachable = emptyList<TrieNode>()
+
+        let markReachable (node : TrieNode) =
+            if not node.Reachable then
+                printfn $"New node reachable"
+                node.Reachable <- true
+                reachable.Add(node)
+
+        // Mark two nodes as reachable:
+        // - root (no prefix)
+        // - top-level module/namespace
+        markReachable trie
+        let topNode = search trie node.Top
+        markReachable topNode
+
+        // Process module refs in order, marking more and more TrieNodes as reachable
+        let processRef (id : LongIdent) =
+            ()
+        node.ModuleRefs
+        |> Array.iter processRef
+
+        // Collect files from all reachable TrieNodes
+        let reachableItems =
+            reachable
+            |> Seq.collect (fun node -> node.GraphNodes)
+        node, List<Node>(reachableItems)
+    )
+
+[<Test>]
+let Foo() =
+
+    let A =
+        """
+module A
+open B
+let x = B.x
+"""
+    let B =
+        """
+module B
+let x = 3
+"""
+
+    let files = [
+        "A", A
+        "B", B
+    ]
+    let nodes =
+        files
+        |> List.map (fun (name, code) -> name, getParseResults code)
+
+    let graph = algorithm nodes
+
+    printfn $"%+A{graph}"

tests/FSharp.Compiler.Service.Tests2/FSharp.Compiler.Service.Tests2.fsproj

@@ -27,10 +27,13 @@
       <Link>Common.fs</Link>
     </Compile>
     <Compile Include="TypeTests.fs" />
-    <Compile Include="Test.fs" />
+    <Compile Include="DepResolving.fs" />
     <Compile Include="..\service\Program.fs">
       <Link>Program.fs</Link>
     </Compile>
+    <None Include="Big.fs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
   <ItemGroup>

tests/FSharp.Compiler.Service.Tests2/TypeTests.fs

@@ -1087,8 +1087,6 @@ let f = a
     printfn $"%+A{stuff}"
     ()
 
-let depends ()
-
 [<Test>]
 let ``Test two`` () =
 
@@ -1112,41 +1110,10 @@ let x = 3
     printfn $"A refs: %+A{visitedA}"
     ()
 
-module A1 = let a = 3
-module A2 = let a = 3
-module A3 = let a = 3
-module A4 =
-
-    type AAttribute(name : string) =
-        inherit System.Attribute()
-
-    let a = 3
-    module A1 =
-        let a = 3
-    type X = int * int
-    type Y = Y of int
-
-module B =
-    open A2
-    let b = [|
-        A1.a
-        A2.a
-        A3.a
-    |]
-    let c : A4.X = 2,2
-    [<A4.A("name")>]
-    let d : A4.Y = A4.Y 2
-    type Z =
-        {
-            X : A4.X
-            Y : A4.Y
-        }
-
-let c = A4.a
-let d = A4.A1.a
-open A4
-let e = A1.a
-open A1
-let f = a
 
-module X = B
+[<Test>]
+let ``Test big`` () =
+    let code = System.IO.File.ReadAllText("Big.fs")
+    let parsedA = getParseResults code
+    let visitedA = visit parsedA
+    printfn $"A refs: %+A{visitedA}"