Merge pull request #26 from hildjj/quotes

Make literal quoting configurable.

README.md

@@ -26,11 +26,11 @@ Usage: peggy-tracks [options] [input_file]
 Options:
   -a,--action              Wrap actions in a box
   -c,--css [file name]     With no file name, outputs the default CSS.  With a
-                           filename, substitutes the CSS in that file.
-  -d,--depth <number>      Maximum depth to expand references (set to Infinity
-                           with --expand).
-  -e,--expand              Expand rule references
+                           filename, substitutes the CSS in that file
+  -d,--depth <number>      Maximum depth to expand references
+  -e,--expand              Expand rule references without depth limit
   -o,--output <file name>  File in which to save output
+  -q,--quote <string>      Quote character for literals (default: "\"")
   -s,--start <rule name>   Rule to start with
   -h, --help               display help for command
 ```

lib/cli.js

@@ -66,6 +66,7 @@ export default class CliCommand extends Command {
       .addOption(new Option("-d,--depth <number>", "Maximum depth to expand references").conflicts("expand"))
       .option("-e,--expand", "Expand rule references without depth limit")
       .option("-o,--output <file name>", "File in which to save output")
+      .option("-q,--quote <string>", "Quote character for literals", '"')
       .option("-s,--start <rule name>", "Rule to start with");
   }
 

lib/index.js

@@ -85,9 +85,10 @@ const visit = peggy.compiler.visitor.build({
       { cls: "class" }
     );
   },
-  literal(node) {
+  literal(node, context) {
+    const q = context.opts.quote ?? '"';
     return new Terminal(
-      `"${stringEscape(node.value)}"${node.ignoreCase ? "i" : ""}`,
+      `${q}${stringEscape(node.value)}${q}${node.ignoreCase ? "i" : ""}`,
       { cls: "literal" }
     );
   },

test/cli.test.js

@@ -171,10 +171,12 @@ test("more examples", async t => {
 test("depth", async t => {
   const inp = url.fileURLToPath(new URL("test.peggy", import.meta.url));
 
+  let q = "";
   for (let i = 0; i < 5; i++) {
     const fullURL = url.fileURLToPath(new URL(`output/depth${i}.svg`, import.meta.url));
-    await exec(t, ["-d", String(i), "-o", fullURL, inp]);
+    await exec(t, ["-q", q, "-d", String(i), "-o", fullURL, inp]);
     t.snapshot(await readFile(fullURL, "utf8"));
+    q += "Q";
   }
 });