feature: better topological sorting

.github/workflows/codeql-analysis.yml

@@ -7,12 +7,12 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [master]
+    branches: [ master ]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [master]
+    branches: [ master ]
   schedule:
-    - cron: '0 16 * * 6'
+    - cron: '0 15 * * 6'
 
 jobs:
   analyze:
@@ -24,48 +24,50 @@ jobs:
       matrix:
         # Override automatic language detection by changing the below list
         # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
-        language: ['go']
+        language: [ 'go' ]
         # Learn more...
         # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v4
-      with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          # We must fetch at least the immediate parents so that if this is
+          # a pull request then we can checkout the head.
+          fetch-depth: 2
 
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
+      # Initializes the Golang environment for the CodeQL tools.
+      # https://github.com/github/codeql-action/issues/1842#issuecomment-1704398087
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: go.mod
 
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file. 
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+          # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
 
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
 
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+      #    and modify them (or add more) to build your code if your project
+      #    uses a compiled language
 
-    #- run: |
-    #   make bootstrap
-    #   make release
+      #- run: |
+      #   make bootstrap
+      #   make release
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2

edges.go

@@ -35,7 +35,7 @@
 }
 
 // resolveEdges adds edges between the vertices
-// At this point, we know all plugins and all provides values
+// At this point, we know all plugins, and all provides values
 func (e *Endure) resolveEdges() error {
 	vertices := e.graph.Vertices()
 
@@ -90,7 +90,7 @@
 
 			// we should have here exact the same number of the deps implementing every particular arg
 			if count != len(args[1:]) {
-				// if there are no plugins which implement Init deps, remove this vertex from the tree
+				// if there are no plugins that implement Init deps, remove this vertex from the tree
 				del := e.graph.Remove(vertices[i].Plugin())
 				for k := 0; k < len(del); k++ {
 					e.registar.Remove(del[k].Plugin())
@@ -115,9 +115,24 @@
 		}
 	}
 
-	ok := e.graph.TopologicalSort()
-	if !ok {
-		return errors.E("cyclic dependencies found, see the DEBUG log")
+	e.graph.TopologicalSort()
+
+	// notify user about the disabled plugins
+	// after topological sorting we remove all plugins with indegree > 0, because there are no edges to them
+	if len(e.graph.TopologicalOrder()) != len(e.graph.Vertices()) {
+		tpl := e.graph.TopologicalOrder()
+		vrt := e.graph.Vertices()
+
+		tmpM := make(map[string]struct{}, 2)
+		for _, v := range tpl {
+			tmpM[v.ID().String()] = struct{}{}
+		}
+
+		for _, v := range vrt {
+			if _, ok := tmpM[v.ID().String()]; !ok {
+				e.log.Warn("topological sort, plugin disabled", slog.String("plugin", v.ID().String()))
+			}
+		}
 	}
 
 	return nil

graph/toposort.go

@@ -1,6 +1,6 @@
 package graph
 
-func (g *Graph) TopologicalSort() bool {
+func (g *Graph) TopologicalSort() {
 	heap := &VertexHeap{}
 
 	for _, v := range g.vertices {
@@ -33,6 +33,4 @@ func (g *Graph) TopologicalSort() bool {
 			}
 		}
 	}
-
-	return len(g.topologicalOrder) >= len(g.vertices)
 }