Use non-exist filename to generate file.

Signed-off-by: Eric Wang <skygragon@gmail.com>
skygragon · Oct 15, 2016 · 1e85050 · 1e85050
1 parent 71d3ae2
commit 1e85050
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/lib/commands/show.js b/lib/commands/show.js
@@ -49,7 +49,13 @@ cmd.handler = function(argv) {
             'unknown language "' + argv.lang + '"');
       problem.code = template.defaultCode;
 
+      // try to use a new filename to avoid overwrite by mistake
       var filename = problem.key + h.langToExt(argv.lang);
+      var i = 0;
+      while (fs.existsSync(filename)) {
+        filename = problem.key + '.' + (i++) + h.langToExt(argv.lang);
+      }
+
       core.exportProblem(problem, filename, !argv.extra);
       msg = sprintf('(File: %s)', chalk.yellow.underline(filename));
     }