Use relative path for links (#2)

Signed-off-by: black-desk <[email protected]>

Author: black-desk

README.md

@@ -69,8 +69,8 @@ relative to the directory from which they are included. I.e., if a file `a/b.md`
 is included in the main document, and another file `a/b/c.md` should be included
 from `a/b.md`, then the relative path from `a/b.md` must be used, in this case
 `b/c.md`. The full relative path will be automatically generated in the final
-document. The same goes for image paths and codeblock file paths using the
-`include-code-files` filter.
+document. The same goes for image paths, link paths and codeblock file paths
+using the `include-code-files` filter.
 
 ## Example
 

expected-auto.native

@@ -128,6 +128,12 @@
             ( "subdir/someimage.png" , "" )
         ]
     ]
+, Para
+    [ Link
+        ( "" , [] , [] )
+        [ Str "Some" , Space , Str "link" ]
+        ( "subdir/someimage.png" , "" )
+    ]
 , Header
     2
     ( "source-include" , [] , [] )

expected.native

@@ -128,6 +128,12 @@
             ( "subdir/someimage.png" , "" )
         ]
     ]
+, Para
+    [ Link
+        ( "" , [] , [] )
+        [ Str "Some" , Space , Str "link" ]
+        ( "subdir/someimage.png" , "" )
+    ]
 , Header
     1
     ( "source-include" , [] , [] )

include-files.lua

@@ -34,6 +34,13 @@ local function update_contents(blocks, shift_by, include_path)
       end
       return header
     end,
+    -- If link paths are relative then prepend include file path
+    Link = function (link)
+        if path.is_relative(link.target) then
+            link.target = path.normalize(path.join({include_path, link.target}))
+        end
+        return link
+    end,
     -- If image paths are relative then prepend include file path
     Image = function (image)
       if path.is_relative(image.src) then

subdir/file-g.md

@@ -4,6 +4,8 @@ Image relative path will be updated.
 
 ![Image title](someimage.png)
 
+[Some link](someimage.png)
+
 # Source include
 
 File inclusion codeblocks for use with include-code-files will be