jekyll: Error: different prefix: "/" and "G:/"

What version of Jekyll are you using (`jekyll -v`)?

jekyll 3.0.3

What operating system are you using?

Windows 10 x64

What did you do?

Being a lazy developer I got tired of typing a long path to my GitHub repository where I run Jekyll, so I created a script to run at login time that uses the subst command to associate a drive letter with the path:

 subst G: E:\<long-path>\GitHub\dbc60.github.io

Now I can just type G: in my console and be instantly transported to my repo. Unfortunately Jekyll crashes with an error about different prefixes.

That said, there is a simple workaround for the problem described below. I can set G: to the parent directory and cd to the repo before running Jekyll. It’s just that the crash was surprising, so I thought you should know about it.

Anyway, here’s what I did. I ran bundle exec jekyll s --drafts

What did you expect to see?

I expected something like:

G:\> bundle exec jekyll s --trace
Configuration file: G:/_config.yml
            Source: G:/
       Destination: G:/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
                    done in 4.408 seconds.
 Auto-regeneration: enabled for 'G:/'
Configuration file: G:/_config.yml
    Server address: http://127.0.0.1:4000/
  Server running... press ctrl-c to stop.

What did you see instead?

Here’s the error output:

G:\> bundle exec jekyll s --drafts
Configuration file: /_config.yml
            Source: G:/
       Destination: G:/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
jekyll 3.0.3 | Error:  different prefix: "/" and "G:/"

I reran the command with the --trace option:

G:\> bundle exec jekyll s --trace
Configuration file: /_config.yml
            Source: G:/
       Destination: G:/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
E:/Apps/Ruby22/lib/ruby/2.2.0/pathname.rb:508:in `relative_path_from': different prefix: "/" and "G:/" (ArgumentError)
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/document.rb:93:in `relative_path'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/document.rb:85:in `draft?'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/document.rb:27:in `initialize'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:55:in `new'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:55:in `block in read_content'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:52:in `map'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:52:in `read_content'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:35:in `read_publishable'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/readers/post_reader.rb:25:in `read_posts'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/reader.rb:59:in `retrieve_posts'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/reader.rb:46:in `read_directories'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/reader.rb:17:in `read'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/site.rb:144:in `read'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/site.rb:57:in `process'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/command.rb:28:in `process_site'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/commands/build.rb:60:in `build'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/commands/build.rb:35:in `process'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/lib/jekyll/commands/serve.rb:26:in `block (2 levels) in init_with_program'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `call'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
    from E:/Apps/Ruby22/lib/ruby/gems/2.2.0/gems/jekyll-3.0.3/bin/jekyll:17:in `<top (required)>'
    from E:/Apps/Ruby22/bin/jekyll:23:in `load'
    from E:/Apps/Ruby22/bin/jekyll:23:in `<main>'

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 38 (13 by maintainers)

Most upvoted comments

FYI: I just rolled back to 3.1.6 and it works fine for me.

chryw on Jul 28, 2016

@sangimed gem uninstall jekyll -v 3.2.0 gem install jekyll -v 3.1.6

chryw on Jul 29, 2016

Same issue. Reverted to 2.5.3 to start working again. gem install jekyll -v ‘2.5.3’

@erikjohnsen Did you try 3.1.6?

parkr on Jul 28, 2016

@sasivarnan Tracking that in #5192

parkr on Aug 3, 2016

Thanks for working on this. I tried 3.2.0.pre.beta1, so here’s an update. I always get this error on Windows 10, regardless of the current directory. From the N:\ (created via the subst command):

Configuration file: /_config.yml
 LiveReload Server: 127.0.0.1:35729
Configuration file: /_config.yml
            Source: N:/
       Destination: N:/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
jekyll 3.2.0.pre.beta1 | Error:  different prefix: "/" and "N:/"

and also from C:\Users\Doug\Notes (which works correctly under 3.1.6):

Configuration file: C:/Users/Doug/Notes/_config.yml
 LiveReload Server: 127.0.0.1:35729
Configuration file: C:/Users/Doug/Notes/_config.yml
            Source: C:/Users/Doug/Notes
       Destination: C:/Users/Doug/Notes/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
jekyll 3.2.0.pre.beta1 | Error:  different prefix: "/" and "C:/Users/Doug/Notes"

dbc60 on Jul 2, 2016

3.2.0 can’t work but 3.1.6

Lucius0 on Jul 29, 2016

@brutalcrozt when i used the version of jekyll 3.2.0.pre.beta1 ，I met an error above，my system is Windows 10 x64 too,So i decide to change the version and find that version 3.1.6 is okay

leoorpio on Jul 11, 2016

last stable at this time 3.1.6 but i got performance issue, not sure why? should i open new issue instead? 😄

sukrosono on Jul 1, 2016

@dbc60 it will happen until I either make sure Pathutil doesn’t have this bug also and fix it and then move our stuff to Pathutil the rest of the way or, Pathname suddenly decides to fix it (doubtful since they’ve been told before.)

envygeeks on Jun 6, 2016

It’s still happening with Jekyll v3.1.6.

dbc60 on Jun 6, 2016

@SuriyaaKudoIsc The subst command doesn’t allow a backslash for the first argument:

C:\> subst G:\ E:\Users\Doug\Projects\Github\dbc60.github.io
Invalid parameter - G:\

but it does automatically put it in:

C:\> subst
H:\: => E:\Users\Doug\Projects\Handmade\dev
N:\: => C:\Users\Doug\Notes
P:\: => E:\Users\Doug\Projects
S:\: => E:\Users\Doug\Projects\Sandbox

dbc60 on Apr 6, 2016

Looks like a bug to me in Jekyll::Configuration.

/cc @jekyll/windows

parkr on Mar 19, 2016