Allow hiding project parent paths.

Set `theme_show_project_parent` to `no` to suppress the parent directory and path entirely when inside a Git or Mercurial project.

Fixes #358

README.md

@@ -107,6 +107,7 @@ set -g default_user your_normal_user
 set -g theme_color_scheme dark
 set -g fish_prompt_pwd_dir_length 0
 set -g theme_project_dir_length 1
+set -g theme_show_project_parent yes
 set -g theme_newline_cursor yes
 set -g theme_newline_prompt '$ '
 ```
@@ -140,6 +141,7 @@ set -g theme_newline_prompt '$ '
 - `theme_use_abbreviated_branch_name`. Set to `yes` to truncate git branch names in the prompt.
 - `fish_prompt_pwd_dir_length`. bobthefish respects the Fish `$fish_prompt_pwd_dir_length` setting to abbreviate the prompt path. Set to `0` to show the full path, `1` (default) to show only the first character of each parent directory name, or any other number to show up to that many characters.
 - `theme_project_dir_length`. The same as `$fish_prompt_pwd_dir_length`, but for the path relative to the current project root. Defaults to `0`; set to any other number to show an abbreviated path.
+- `theme_show_project_parent`. Set to `no` to only show the project directory name, and not its parent path, when inside a project.
 - `theme_newline_cursor`. Use `yes` to have cursor start on a new line. By default the prompt is only one line. When working with long directories it may be preferrend to have cursor on the next line. Setting this to `clean` instead of `yes` suppresses the caret on the new line.
 - `theme_newline_prompt`. Use a custom prompt with newline cursor. By default this is the chevron right glyph or `>` when powerline fonts are disabled.
 

functions/fish_prompt.fish

@@ -51,6 +51,7 @@
 #     set -g theme_color_scheme dark
 #     set -g fish_prompt_pwd_dir_length 0
 #     set -g theme_project_dir_length 1
+#     set -g theme_show_project_parent no
 #     set -g theme_newline_cursor yes
 
 # ==============================
@@ -358,7 +359,7 @@ function __bobthefish_start_segment -S -d 'Start a prompt segment'
     set __bobthefish_current_bg $bg
 end
 
-function __bobthefish_path_segment -S -a segment_dir -d 'Display a shortened form of a directory'
+function __bobthefish_path_segment -S -a segment_dir -a path_type -d 'Display a shortened form of a directory'
     set -l segment_color $color_path
     set -l segment_basename_color $color_path_basename
 
@@ -382,7 +383,9 @@ function __bobthefish_path_segment -S -a segment_dir -d 'Display a shortened for
             set directory (__bobthefish_basename "$segment_dir")
     end
 
-    echo -n $parent
+    [ "$theme_show_project_parent" != "no" -o "$path_type" != "project" ]
+    and echo -n $parent
+
     set_color -b $segment_basename_color
     echo -ns $directory ' '
 end
@@ -1057,7 +1060,7 @@ function __bobthefish_prompt_hg -S -a hg_root_dir -a real_pwd -d 'Display the ac
         set flag_colors $color_repo_dirty
     end
 
-    __bobthefish_path_segment $hg_root_dir
+    __bobthefish_path_segment $hg_root_dir project
 
     __bobthefish_start_segment $flag_colors
     echo -ns $hg_glyph ' '
@@ -1117,7 +1120,7 @@ function __bobthefish_prompt_git -S -a git_root_dir -a real_pwd -d 'Display the
         set flag_colors $color_repo_staged
     end
 
-    __bobthefish_path_segment $git_root_dir
+    __bobthefish_path_segment $git_root_dir project
 
     __bobthefish_start_segment $flag_colors
     echo -ns (__bobthefish_git_branch) $flags ' '
@@ -1199,7 +1202,7 @@ function __bobthefish_prompt_git -S -a git_root_dir -a real_pwd -d 'Display the
 end
 
 function __bobthefish_prompt_dir -S -a real_pwd -d 'Display a shortened form of the current directory'
-    __bobthefish_path_segment "$real_pwd"
+    __bobthefish_path_segment "$real_pwd" pwd
 end
 
 
@@ -1225,7 +1228,7 @@ function fish_prompt -d 'bobthefish, a fish theme optimized for awesome'
 
     # Start each line with a blank slate
     set -l __bobthefish_current_bg
-    
+
     set -l real_pwd (__bobthefish_pwd)
 
     # Status flags and input mode