Fix filters for theme templates

1 files changed, 14 insertions, 1 deletions

diff --git a/lib/utils/location.js b/lib/utils/location.js
index f1159f1..94d9b2a 100644
--- a/lib/utils/location.js
+++ b/lib/utils/location.js
@@ -71,11 +71,24 @@ function relative(dir, file) {
     return normalize(path.relative(dir, file));
 }
 
+/**
+    Convert an absolute path to a relative path for a specific folder (dir)
+    ('test/test.md', 'hello.md') -> '../hello.md'
+
+    @param {String} baseFile: current file
+    @param {String} file: absolute path of file
+    @return {String}
+*/
+function relativeForFile(baseFile, file) {
+    return relative(path.dirname(baseFile), file);
+}
+
 module.exports = {
     isExternal: isExternal,
     isRelative: isRelative,
     isAnchor: isAnchor,
     normalize: normalize,
     toAbsolute: toAbsolute,
-    relative: relative
+    relative: relative,
+    relativeForFile: relativeForFile
 };