Escape deprecation messages before interpolating into source text

CHANGELOG_PENDING.md

@@ -14,3 +14,5 @@
 
 ### Bug Fixes
 
+- [codegen/node] - Fix an issue with escaping deprecation messages.
+  [#9371](https://github.com/pulumi/pulumi/pull/9371)

pkg/codegen/nodejs/gen.go

@@ -64,6 +64,17 @@ func title(s string) string {
 	return string(append([]rune{unicode.ToUpper(runes[0])}, runes[1:]...))
 }
 
+// escape returns the string escaped for a JS string literal
+func escape(s string) string {
+	// Seems the most fool-proof way of doing this is by using the JSON marshaler and then stripping the surrounding quotes
+	escaped, err := json.Marshal(s)
+	contract.AssertNoError(err)
+	contract.Assertf(len(escaped) >= 2, "JSON(%s) expected a quoted string but returned %s", s, escaped)
+	contract.Assertf(escaped[0] == byte('"') && escaped[len(escaped)-1] == byte('"'), "JSON(%s) expected a quoted string but returned %s", s, escaped)
+
+	return string(escaped)[1:(len(escaped) - 1)]
+}
+
 // camel converts s to camel case.
 //
 // Examples:
@@ -648,7 +659,7 @@ func (mod *modContext) genResource(w io.Writer, r *schema.Resource) error {
 		fmt.Fprintf(w, "    public static get(name: string, id: pulumi.Input<pulumi.ID>, %sopts?: pulumi.%s): %s {\n",
 			stateParam, optionsType, name)
 		if r.DeprecationMessage != "" && mod.compatibility != kubernetes20 {
-			fmt.Fprintf(w, "        pulumi.log.warn(\"%s is deprecated: %s\")\n", name, r.DeprecationMessage)
+			fmt.Fprintf(w, "        pulumi.log.warn(\"%s is deprecated: %s\")\n", name, escape(r.DeprecationMessage))
 		}
 		fmt.Fprintf(w, "        return new %s(name, %s{ ...opts, id: id });\n", name, stateRef)
 		fmt.Fprintf(w, "    }\n")
@@ -815,7 +826,7 @@ func (mod *modContext) genResource(w io.Writer, r *schema.Resource) error {
 				argsType, stateType, optionsType)
 		}
 		if r.DeprecationMessage != "" && mod.compatibility != kubernetes20 {
-			fmt.Fprintf(w, "        pulumi.log.warn(\"%s is deprecated: %s\")\n", name, r.DeprecationMessage)
+			fmt.Fprintf(w, "        pulumi.log.warn(\"%s is deprecated: %s\")\n", name, escape(r.DeprecationMessage))
 		}
 		fmt.Fprintf(w, "        let resourceInputs: pulumi.Inputs = {};\n")
 		fmt.Fprintf(w, "        opts = opts || {};\n")
@@ -954,7 +965,7 @@ func (mod *modContext) genResource(w io.Writer, r *schema.Resource) error {
 		fmt.Fprintf(w, "    %s(%s): %s {\n", methodName, argsig, retty)
 		if fun.DeprecationMessage != "" {
 			fmt.Fprintf(w, "        pulumi.log.warn(\"%s.%s is deprecated: %s\")\n", name, methodName,
-				fun.DeprecationMessage)
+				escape(fun.DeprecationMessage))
 		}
 
 		// Zero initialize the args if empty and necessary.
@@ -1084,7 +1095,7 @@ func (mod *modContext) genFunction(w io.Writer, fun *schema.Function) error {
 	fmt.Fprintf(w, "export function %s(%sopts?: pulumi.InvokeOptions): Promise<%s> {\n",
 		name, argsig, functionReturnType(fun))
 	if fun.DeprecationMessage != "" && mod.compatibility != kubernetes20 {
-		fmt.Fprintf(w, "    pulumi.log.warn(\"%s is deprecated: %s\")\n", name, fun.DeprecationMessage)
+		fmt.Fprintf(w, "    pulumi.log.warn(\"%s is deprecated: %s\")\n", name, escape(fun.DeprecationMessage))
 	}
 
 	// Zero initialize the args if empty and necessary.

pkg/codegen/nodejs/gen_test.go

@@ -218,3 +218,27 @@ func Test_isStringType(t *testing.T) {
 		})
 	}
 }
+
+func TestEscape(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		input    string
+		expected string
+	}{
+		{"test", "test"},
+		{"sub\"string\"", "sub\\\"string\\\""},
+		{"slash\\s", "slash\\\\s"},
+		{"N\\A \"bad data\"", "N\\\\A \\\"bad data\\\""},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.input, func(t *testing.T) {
+			t.Parallel()
+
+			got := escape(tt.input)
+			if tt.expected != got {
+				t.Errorf("escape(%s) was %s want %s", tt.input, got, tt.expected)
+			}
+		})
+	}
+}