Enable DocsLink for attributes (#115)

* add links for dependecy key attribute expressions

* copy docs link on schema merge

* add test case for attribute links

* Update decoder/links_test.go

Co-authored-by: Radek Simko <[email protected]>

Co-authored-by: Radek Simko <[email protected]>

Author: dbanck

decoder/decoder.go

@@ -71,6 +71,7 @@ func mergeBlockBodySchemas(block *hcl.Block, blockSchema *schema.BlockSchema) (*
 		}
 
 		mergedSchema.Targets = depSchema.Targets.Copy()
+		mergedSchema.DocsLink = depSchema.DocsLink.Copy()
 	}
 
 	return mergedSchema, nil

decoder/links.go

@@ -44,16 +44,24 @@ func (d *PathDecoder) linksInBody(body *hclsyntax.Body, bodySchema *schema.BodyS
 		if block.Body != nil {
 			depSchema, dk, ok := NewBlockSchema(blockSchema).DependentBodySchema(block.AsHCLBlock())
 			if ok && depSchema.DocsLink != nil {
+				link := depSchema.DocsLink
+				u, err := d.docsURL(link.URL, "documentLink")
+				if err != nil {
+					continue
+				}
 				for _, labelDep := range dk.Labels {
-					link := depSchema.DocsLink
-					u, err := d.docsURL(link.URL, "documentLink")
-					if err == nil {
-						links = append(links, lang.Link{
-							URI:     u.String(),
-							Tooltip: link.Tooltip,
-							Range:   block.LabelRanges[labelDep.Index],
-						})
-					}
+					links = append(links, lang.Link{
+						URI:     u.String(),
+						Tooltip: link.Tooltip,
+						Range:   block.LabelRanges[labelDep.Index],
+					})
+				}
+				for _, attrDep := range dk.Attributes {
+					links = append(links, lang.Link{
+						URI:     u.String(),
+						Tooltip: link.Tooltip,
+						Range:   block.Body.Attributes[attrDep.Name].Expr.Range(),
+					})
 				}
 			}
 		}

decoder/links_test.go

@@ -13,7 +13,7 @@ import (
 	"github.com/zclconf/go-cty/cty"
 )
 
-func TestLinksInFile(t *testing.T) {
+func TestLinksInFileBlock(t *testing.T) {
 	resourceLabelSchema := []*schema.LabelSchema{
 		{Name: "type", IsDepKey: true},
 		{Name: "name"},
@@ -101,6 +101,91 @@ func TestLinksInFile(t *testing.T) {
 	}
 }
 
+func TestLinksInFileAttribute(t *testing.T) {
+	resourceLabelSchema := []*schema.LabelSchema{
+		{Name: "name"},
+	}
+	blockSchema := &schema.BlockSchema{
+		Labels:      resourceLabelSchema,
+		Description: lang.Markdown("My special block"),
+		Body: &schema.BodySchema{
+			Attributes: map[string]*schema.AttributeSchema{
+				"num_attr": {Expr: schema.LiteralTypeOnly(cty.Number)},
+				"source": {
+					Expr:        schema.LiteralTypeOnly(cty.String),
+					Description: lang.PlainText("Special attribute"),
+					IsDepKey:    true,
+				},
+			},
+		},
+		DependentBody: map[schema.SchemaKey]*schema.BodySchema{
+			schema.NewSchemaKey(schema.DependencyKeys{
+				Attributes: []schema.AttributeDependent{
+					{
+						Name: "source",
+						Expr: schema.ExpressionValue{
+							Static: cty.StringVal("example.com/source"),
+						},
+					},
+				},
+			}): {
+				DocsLink: &schema.DocsLink{URL: "https://example.com/some/source"},
+			},
+		},
+	}
+	bodySchema := &schema.BodySchema{
+		Blocks: map[string]*schema.BlockSchema{
+			"myblock": blockSchema,
+		},
+	}
+	testConfig := []byte(`myblock "example" {
+  source = "example.com/source"
+  num_attr = 4
+}
+`)
+
+	f, pDiags := hclsyntax.ParseConfig(testConfig, "test.tf", hcl.InitialPos)
+	if len(pDiags) > 0 {
+		t.Fatal(pDiags)
+	}
+
+	d := testPathDecoder(t, &PathContext{
+		Schema: bodySchema,
+		Files: map[string]*hcl.File{
+			"test.tf": f,
+		},
+	})
+
+	links, err := d.LinksInFile("test.tf")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedLinks := []lang.Link{
+		{
+			URI: "https://example.com/some/source",
+			Range: hcl.Range{
+				Filename: "test.tf",
+				Start: hcl.Pos{
+					Line:   2,
+					Column: 12,
+					Byte:   31,
+				},
+				End: hcl.Pos{
+					Line:   2,
+					Column: 32,
+					Byte:   51,
+				},
+			},
+		},
+	}
+
+	diff := cmp.Diff(expectedLinks, links)
+	if diff != "" {
+		t.Fatalf("unexpected links: %s", diff)
+	}
+}
+
 func TestLinksInFile_json(t *testing.T) {
 	f, pDiags := json.Parse([]byte(`{
 	"customblock": {
@@ -117,6 +202,7 @@ func TestLinksInFile_json(t *testing.T) {
 		},
 	})
 
+	// We never want to provide links in JSON configs
 	_, err := d.LinksInFile("test.tf.json")
 	unknownFormatErr := &UnknownFileFormatError{}
 	if !errors.As(err, &unknownFormatErr) {