Complete ebook generation using ebook-convert

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/utils/fs.js b/lib/utils/fs.js
index be3ec0e..3f97096 100644
--- a/lib/utils/fs.js
+++ b/lib/utils/fs.js
@@ -113,6 +113,22 @@ function assertFile(filePath, generator) {
     });
 }
 
+/**
+    Pick a file, returns the absolute path if exists, undefined otherwise
+
+    @param {String} rootFolder
+    @param {String} fileName
+    @return {String}
+*/
+function pickFile(rootFolder, fileName) {
+    var result = path.join(rootFolder, fileName);
+    if (fs.existsSync(result)) {
+        return result;
+    }
+
+    return undefined;
+}
+
 module.exports = {
     exists: fileExists,
     existsSync: fs.existsSync,
@@ -120,6 +136,7 @@ module.exports = {
     readFile: Promise.nfbind(fs.readFile),
     writeFile: Promise.nfbind(fs.writeFile),
     assertFile: assertFile,
+    pickFile: pickFile,
     stat: Promise.nfbind(fs.stat),
     statSync: fs.statSync,
     readdir: Promise.nfbind(fs.readdir),