feat: add support for escaping . in address

README.md

@@ -304,6 +304,26 @@ resource "foo" "bar" {
 }
 ```
 
+### Address escaping
+
+Address escaping is supported for labels that contain `.`.
+
+Given the following file:
+
+```body.hcl
+resource "foo.bar" {
+  attr1 = "val1"
+  nested {
+    attr2 = "val2"
+  }
+}
+```
+
+```
+$ cat tmp/attr.hcl | hcledit attribute get 'resource.foo\.bar.nested.attr2'
+"val2"
+```
+
 ## License
 
 MIT

editor/address.go

@@ -0,0 +1,42 @@
+package editor
+
+import (
+	"strings"
+)
+
+func createAddressFromString(address string) []string {
+	var separator byte = '.'
+	var escapeString byte = '\\'
+
+	var result []string
+	var token []byte
+	for i := 0; i < len(address); i++ {
+		if address[i] == separator {
+			result = append(result, string(token))
+			token = token[:0]
+		} else if address[i] == escapeString && i+1 < len(address) {
+			i++
+			token = append(token, address[i])
+		} else {
+			token = append(token, address[i])
+		}
+	}
+	result = append(result, string(token))
+	return result
+}
+
+func createStringFromAddress(address []string) string {
+	separator := "."
+	escapeString := "\\"
+
+	result := ""
+
+	for i, s := range address {
+		if i > 0 {
+			result = result + separator
+		}
+		result = result + strings.ReplaceAll(s, separator, escapeString+separator)
+	}
+
+	return result
+}

editor/address_test.go

@@ -0,0 +1,75 @@
+package editor
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestCreateAddressFromString(t *testing.T) {
+	cases := []struct {
+		name    string
+		address string
+		want    []string
+	}{
+		{
+			name:    "simple address",
+			address: "b1",
+			want:    []string{"b1"},
+		},
+		{
+			name:    "attribute address",
+			address: "b1.l1.a1",
+			want:    []string{"b1", "l1", "a1"},
+		},
+		{
+			name:    "escaped address",
+			address: `b1.l\.1.a1`,
+			want:    []string{"b1", "l.1", "a1"},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := createAddressFromString(tc.address)
+
+			if diff := cmp.Diff(tc.want, got); diff != "" {
+				t.Fatalf("got:\n%s\nwant:\n%s\ndiff(-want +got):\n%v", got, tc.want, diff)
+			}
+		})
+	}
+}
+
+func TestCreateStringFromAddress(t *testing.T) {
+	cases := []struct {
+		name    string
+		address []string
+		want    string
+	}{
+		{
+			name:    "simple address",
+			address: []string{"b1"},
+			want:    "b1",
+		},
+		{
+			name:    "simple address",
+			address: []string{"b1", "l1", "a1"},
+			want:    "b1.l1.a1",
+		},
+		{
+			name:    "simple address",
+			address: []string{"b1", `l.1`, "a1"},
+			want:    `b1.l\.1.a1`,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := createStringFromAddress(tc.address)
+
+			if diff := cmp.Diff(tc.want, got); diff != "" {
+				t.Fatalf("got:\n%s\nwant:\n%s\ndiff(-want +got):\n%v", got, tc.want, diff)
+			}
+		})
+	}
+}

editor/filter_attribute_append.go

@@ -2,7 +2,6 @@ package editor
 
 import (
 	"fmt"
-	"strings"
 
 	"github.com/hashicorp/hcl/v2/hclwrite"
 )
@@ -33,12 +32,12 @@ func (f *AttributeAppendFilter) Filter(inFile *hclwrite.File) (*hclwrite.File, e
 	attrName := f.address
 	body := inFile.Body()
 
-	a := strings.Split(f.address, ".")
+	a := createAddressFromString(f.address)
 	if len(a) > 1 {
 		// if address contains dots, the last element is an attribute name,
 		// and the rest is the address of the block.
 		attrName = a[len(a)-1]
-		blockAddr := strings.Join(a[:len(a)-1], ".")
+		blockAddr := createStringFromAddress(a[:len(a)-1])
 		blocks, err := findLongestMatchingBlocks(body, blockAddr)
 		if err != nil {
 			return nil, err

editor/filter_attribute_append_test.go

@@ -102,6 +102,26 @@ b1 "l1" {
 			ok:      false,
 			want:    ``,
 		},
+		{
+			name: "escaped address",
+			src: `
+a0 = v0
+b1 "l.1" {
+  a1 = v1
+}
+`,
+			address: `b1.l\.1.a2`,
+			value:   "v2",
+			newline: false,
+			ok:      true,
+			want: `
+a0 = v0
+b1 "l.1" {
+  a1 = v1
+  a2 = v2
+}
+`,
+		},
 	}
 
 	for _, tc := range cases {

editor/filter_attribute_remove_test.go

@@ -98,6 +98,24 @@ a0 = v0
 b1 "l1" {
   a1 = v1
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+a0 = v0
+b1 "l.1" {
+  a1 = v1
+  a2 = v2
+}
+`,
+			address: `b1.l\.1.a1`,
+			ok:      true,
+			want: `
+a0 = v0
+b1 "l.1" {
+  a2 = v2
+}
 `,
 		},
 	}

editor/filter_attribute_set_test.go

@@ -149,6 +149,24 @@ a0 = v0
 b1 "l1" {
   a1 = v1
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+a0 = v0
+b1 "l.1" {
+  a1 = v1
+}
+`,
+			address: `b1.l\.1.a1`,
+			value:   "v2",
+			ok:      true,
+			want: `
+a0 = v0
+b1 "l.1" {
+  a1 = v2
+}
 `,
 		},
 	}

editor/filter_block_append_test.go

@@ -150,6 +150,33 @@ b1 {
   b11 {
   }
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+a0 = v0
+b1 {
+  a2 = v2
+}
+
+b1 "l.1" {
+}
+`,
+			parent:  `b1.l\.1`,
+			child:   `b11.l\.1.l12`,
+			newline: false,
+			ok:      true,
+			want: `
+a0 = v0
+b1 {
+  a2 = v2
+}
+
+b1 "l.1" {
+  b11 "l.1" "l12" {
+  }
+}
 `,
 		},
 	}

editor/filter_block_get.go

@@ -2,7 +2,6 @@ package editor
 
 import (
 	"fmt"
-	"strings"
 
 	"github.com/hashicorp/hcl/v2/hclwrite"
 )
@@ -59,7 +58,7 @@ func parseAddress(address string) (string, []string, error) {
 		return "", []string{}, fmt.Errorf("failed to parse address: %s", address)
 	}
 
-	a := strings.Split(address, ".")
+	a := createAddressFromString(address)
 	typeName := a[0]
 	labels := []string{}
 	if len(a) > 1 {

editor/filter_block_get_test.go

@@ -237,6 +237,26 @@ b1 {
 			want: `b3 {
   a3 = v3
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+b1 "b.2" {
+  a1 = v1
+  b2 {
+    a1 = v2
+  }
+}
+`,
+			address: `b1.b\.2`,
+			ok:      true,
+			want: `b1 "b.2" {
+  a1 = v1
+  b2 {
+    a1 = v2
+  }
+}
 `,
 		},
 	}

editor/filter_block_remove_test.go

@@ -114,6 +114,21 @@ b1 l1 l3 {
 
 b1 l1 {
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+b1 {
+}
+
+b1 "l.1" {
+}
+`,
+			address: `b1.l\.1`,
+			ok:      true,
+			want: `b1 {
+}
 `,
 		},
 	}

editor/filter_block_rename_test.go

@@ -31,6 +31,29 @@ b1 "l2" {
   a2 = v2
 }
 
+b2 "l2" {
+}
+`,
+		},
+
+		{
+			name: "escaped address",
+			src: `a0 = v0
+b1 "l.1" {
+  a2 = v2
+}
+
+b2 "l2" {
+}
+`,
+			from: `b1.l\.1`,
+			to:   `b1.l\.2`,
+			ok:   true,
+			want: `a0 = v0
+b1 "l.2" {
+  a2 = v2
+}
+
 b2 "l2" {
 }
 `,

editor/filter_body_get_test.go

@@ -113,6 +113,22 @@ b1 {
 b2 {
   a2 = v2
 }
+`,
+		},
+		{
+			name: "escaped address",
+			src: `
+b1 {
+  a1 =  v1
+}
+
+b1 "l.1" {
+  a2 = v2
+}
+`,
+			address: `b1.l\.1`,
+			ok:      true,
+			want: `a2 = v2
 `,
 		},
 	}