Address first pass of comments

README.md

@@ -126,7 +126,7 @@ set -g theme_newline_prompt '$ '
 
 - `theme_display_ruby`. Use `no` to completely hide all information about Ruby version. By default Ruby version displayed if there is the difference from default settings.
 - `theme_display_node`. If set to `always`, will display current NPM, NVM or FNM node version. If set to `yes`, will display the version if an `.nvmrc`, `.node-version` or `package.json` file is found in the parent directories.
-- `theme_display_rustc`. If set to `always`, will always show the rustc version. If set to `yes`, will show the version when inside a Cargo project. Use `diff` to show the rustc version if there is a difference from global rustc installed (if any). By default, we do not show the information.
+- `theme_display_rustc`. Use `no` to completely hide all information about the Rust compiler version. By default the Rust compiler version will be displayed if there is a difference from the globally installed one.
 - `theme_display_vagrant`. This feature is disabled by default, use `yes` to display Vagrant status in your prompt. Please note that only the VirtualBox and VMWare providers are supported.
 - `theme_display_vi`. By default the vi mode indicator will be shown if vi or hybrid key bindings are enabled. Use `no` to hide the indicator, or `yes` to show the indicator.
 - `theme_display_k8s_context`. This feature is disabled by default. Use `yes` to show the current kubernetes context (`> kubectl config current-context`).

functions/__bobthefish_glyphs.fish

@@ -21,7 +21,7 @@ function __bobthefish_glyphs -S -d 'Define glyphs used by bobthefish'
   set -x pypy_glyph              \u1D56
 
   set -x ruby_glyph              ''
-  set -x rustc_glyph              ''
+  set -x rustc_glyph             ''
   set -x go_glyph                ''
   set -x nix_glyph               ''
 
@@ -71,7 +71,7 @@ function __bobthefish_glyphs -S -d 'Define glyphs used by bobthefish'
     set nix_glyph        \uF313 ' ' # nf-linux-nixos
     set virtualenv_glyph \uE73C ' '
     set ruby_glyph       \uE791 ' '
-    set rustc_glyph       \uE7a8 ' ' # Rust Nerd Font logo
+    set rustc_glyph      \uE7a8 ' ' # Rust Nerd Font logo
     set go_glyph         \uE626 ' '
     set node_glyph       \uE718 ' '
 

functions/fish_prompt.fish

@@ -847,14 +847,16 @@ function __bobthefish_prompt_rubies -S -d 'Display current Ruby information'
     echo -ns $ruby_glyph $ruby_version ' '
 end
 
-function __bobthefish_get_cargo_version -S -d 'Display the cargo version in a directory'
-    pushd $argv[1]
-    command rustc --version | cut -d ' ' -f 2
-    popd
+function __bobthefish_get_global_rustc_version -S -d 'Display the global cargo version'
+    command fish -c "cd /; rustc --version | cut -d ' ' -f 2"
+end
+
+function __bobthefish_get_local_rustc_version -S -d 'Display the local cargo version in the CWD'
+    rustc --version | cut -d ' ' -f 2
 end
 
 function __bobthefish_prompt_rustc -S -d 'Display current cargo version if different than system'
-    [ "$theme_display_rustc" = '' ]
+    [ "$theme_display_rustc" = 'no' ]
     and return
 
     type -fq rustc
@@ -865,17 +867,14 @@ function __bobthefish_prompt_rustc -S -d 'Display current cargo version if diffe
 
     switch "$theme_display_rustc"
         case always
-            set local_rustc_version (__bobthefish_get_cargo_version (__bobthefish_pwd))
+            set local_rustc_version (__bobthefish_get_local_rustc_version)
         case yes
-            cargo locate-project --message-format plain --quiet >/dev/null 2>/dev/null
-            and set local_rustc_version (__bobthefish_get_cargo_version (__bobthefish_pwd))
-        case diff
-            if not set -q __bobthefish_global_cargo_version
-                set -g __bobthefish_global_cargo_version (__bobthefish_get_cargo_version /)
+            if not set -q __bobthefish_global_rustc_version
+                set -g __bobthefish_global_rustc_version (__bobthefish_get_global_rustc_version)
             end
 
-            set local_rustc_version (__bobthefish_get_cargo_version (__bobthefish_pwd))
-            if [ "$local_rustc_version" = "$__bobthefish_global_cargo_version" ]
+            set local_rustc_version (__bobthefish_get_local_rustc_version)
+            if [ "$local_rustc_version" = "$__bobthefish_global_rustc_version" ]
                 set local_rustc_version ''
             end
     end