Correct wildcard naming as described in README (#385)

Author: paescuj

src/command-parser/expand-npm-wildcard.spec.ts

@@ -83,6 +83,25 @@ for (const npmCmd of ['npm', 'yarn', 'pnpm']) {
             ]);
         });
 
+        it('uses wildcard match of script as command name', () => {
+            readPkg.mockReturnValue({
+                scripts: {
+                    'watch-js': '',
+                    'watch-css': '',
+                },
+            });
+
+            expect(
+                parser.parse({
+                    name: '',
+                    command: `${npmCmd} run watch-*`,
+                })
+            ).toEqual([
+                { name: 'js', command: `${npmCmd} run watch-js` },
+                { name: 'css', command: `${npmCmd} run watch-css` },
+            ]);
+        });
+
         it('uses existing command name as prefix to the wildcard match', () => {
             readPkg.mockReturnValue({
                 scripts: {

src/command-parser/expand-npm-wildcard.ts

@@ -44,7 +44,9 @@ export class ExpandNpmWildcard implements CommandParser {
         const preWildcard = _.escapeRegExp(cmdNameSansOmission.slice(0, wildcardPosition));
         const postWildcard = _.escapeRegExp(cmdNameSansOmission.slice(wildcardPosition + 1));
         const wildcardRegex = new RegExp(`^${preWildcard}(.*?)${postWildcard}$`);
-        const currentName = commandInfo.name || '';
+        // If 'commandInfo.name' doesn't match 'cmdName', this means a custom name
+        // has been specified and thus becomes the prefix (as described in the README).
+        const prefix = commandInfo.name !== cmdName ? commandInfo.name : '';
 
         return this.scripts
             .map((script) => {
@@ -62,9 +64,9 @@ export class ExpandNpmWildcard implements CommandParser {
                     return {
                         ...commandInfo,
                         command: `${npmCmd} run ${script}${args}`,
-                        // Will use an empty command name if command has no name and the wildcard match is empty,
-                        // e.g. if `npm:watch-*` matches `npm run watch-`.
-                        name: currentName + match[1],
+                        // Will use an empty command name if no prefix has been specified and
+                        // the wildcard match is empty, e.g. if `npm:watch-*` matches `npm run watch-`.
+                        name: prefix + match[1],
                     };
                 }
             })