Enhacement: Go Version segment uses Go colours and only the version n…

…umber is

shown.

1. Why is this change neccesary?
Because the go_version segment had a green background when other segments (like
rbenv) have a colour that matches the language.
The Go version had the string "go" before the semantic versioning being
redundant to have the Gopher icon and the String.
The segment was only visible when inside the GOPATH, and some users (like me)
may be interested in the segment being shown persistently.

2. How does it address the issue?
The background colour was changed from green to cyan and the foreground colour
from white to black in order to match Go colours.
Only the version of Go is shown in the segment.
A variable was added to see the segment persistently if the user wishes to.

3. What side effects does this change have?
None!

segments/go_version/README.md

@@ -10,6 +10,18 @@ where you want to show this segment.
 
 ## Configuration
 
+This segment shows the version of Go installed.
+
+It figures out the version being used by taking the output of the `go version` command.
+
+* If `go` is not in $PATH, nothing will be shown.
+* By default, if the current Go version is only shown while inside your GOPATH. See the configuration variable, below, to modify this behavior.
+
+| Variable | Default Value | Description |
+|----------|---------------|-------------|
+|`P9K_GO_VERSION_PROMPT_ALWAYS_SHOW` |`false`|Set to true if you wish to show the go_version segment even if you're not inside your GOPATH.                                  |
+
+
 ### Color Customization
 
 You can change the foreground and background color of this segment by setting
@@ -21,4 +33,4 @@ P9K_GO_VERSION_BACKGROUND='blue'
 ### Customize Icon
 
 The main Icon can be changed by setting `P9K_GO_VERSION_ICON="my_icon"`. To change the
-icon color only, set `P9K_GO_VERSION_ICON_COLOR="red"`.
+icon color only, set `P9K_GO_VERSION_ICON_COLOR="red"`.

segments/go_version/go_version.p9k

@@ -12,7 +12,11 @@
   # Parameters:
   #   segment_name  context  background  foreground  Generic  Flat/Awesome-Patched  Awesome-FontConfig  Awesome-Mapped-FontConfig  NerdFont
   #                                                                                                          
-  p9k::register_segment "GO_VERSION" '' 'green' 'grey93' 'Go'  ''  ''  '\u'${CODEPOINT_OF_DEVICONS_GIT_PULL_REQUEST}  $'\uE626'
+  p9k::register_segment "GO_VERSION" '' 'cyan' 'black' 'Go'  ''  ''  '\u'${CODEPOINT_OF_DEVICONS_GIT_PULL_REQUEST}  $'\uE626'
+
+  ################################################################
+  # Register segment default values
+  p9k::set_default P9K_GO_VERSION_PROMPT_ALWAYS_SHOW false
 }
 
 ################################################################
@@ -27,10 +31,10 @@
 prompt_go_version() {
   local go_version
   local go_path
-  go_version=$(go version 2>/dev/null | sed -E "s/.*(go[0-9.]*).*/\1/")
+  go_version=$(go version 2>/dev/null | sed -E 's/.*(go[0-9.]*).*/\1/; s/go//g')
   go_path=$(go env GOPATH 2>/dev/null)
 
-  if [[ -n "$go_version" && "${PWD##$go_path}" != "$PWD" ]]; then
+  if [[ -n "$go_version" && "${PWD##$go_path}" != "$PWD" || "${P9K_GO_VERSION_PROMPT_ALWAYS_SHOW}" == "true" ]]; then
     p9k::prepare_segment "$0" "" $1 "$2" $3 "$go_version"
   fi
 }

segments/go_version/go_version.spec

@@ -44,7 +44,7 @@ function testGo() {
 
   PWD="$HOME/go/src/github.com/bhilburn/powerlevel9k"
 
-  assertEquals "%K{002} %F{255}Go %F{255}go1.5.3 %k%F{002}%f " "$(__p9k_build_left_prompt)"
+  assertEquals "%K{006} %F{000}Go %F{000}1.5.3 %k%F{006}%f " "$(__p9k_build_left_prompt)"
 
   unset P9K_GO_ICON
   unset PWD