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Merge pull request #340 from mjgiarlo/rvm-indicator
Add RVM segment for Rubyists who use RVM
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "errors" | ||
| "os" | ||
| "os/exec" | ||
| "strings" | ||
|
|
||
| pwl "github.com/justjanne/powerline-go/powerline" | ||
| ) | ||
|
|
||
| func runRvmCommand(cmd string, args ...string) (string, error) { | ||
| command := exec.Command(cmd, args...) | ||
| out, err := command.Output() | ||
| return string(out), err | ||
| } | ||
|
|
||
| // check RUBY_VERSION variable | ||
| func checkEnvForRubyVersion() (string, error) { | ||
| rubyVersion := os.Getenv("RUBY_VERSION") | ||
| if len(rubyVersion) <= 0 { | ||
| return "", errors.New("Not found in RUBY_VERSION") | ||
| } | ||
| return rubyVersion, nil | ||
| } | ||
|
|
||
| // check GEM_HOME variable for gemset information | ||
| func checkEnvForRubyGemset() (string, error) { | ||
| gemHomeSegments := strings.Split(os.Getenv("GEM_HOME"), "@") | ||
|
|
||
| if len(gemHomeSegments) <= 1 { | ||
| return "", errors.New("Gemset not found in GEM_HOME") | ||
| } | ||
|
|
||
| return gemHomeSegments[1], nil | ||
| } | ||
|
|
||
| // retrieve ruby version from RVM | ||
| func checkForRvmOutput() (string, error) { | ||
| // ask RVM what the current ruby version is | ||
| out, err := runRvmCommand("rvm", "current") | ||
| if err != nil { | ||
| return "", errors.New("Not found in RVM output") | ||
| } | ||
| items := strings.Split(out, " ") | ||
| if len(items) <= 0 { | ||
| return "", errors.New("Not found in RVM output") | ||
| } | ||
|
|
||
| return items[0], nil | ||
| } | ||
|
|
||
| func segmentRvm(p *powerline) []pwl.Segment { | ||
| var ( | ||
| segment string | ||
| err error | ||
| ) | ||
|
|
||
| segment, err = checkEnvForRubyVersion() | ||
| if err != nil { | ||
| segment, err = checkForRubyVersionFileInTree() | ||
| } | ||
| if err != nil { | ||
| segment, err = checkForRvmOutput() | ||
| } | ||
| if err != nil { | ||
| return []pwl.Segment{} | ||
| } | ||
|
|
||
| // Remove explicit "ruby-" prefix from segment because it's superfluous | ||
| segment_components := strings.Split(segment, "-") | ||
| if len(segment_components) > 1 { | ||
| segment = segment_components[1] | ||
| } | ||
|
|
||
| // If gemset is missing from segment, get that info from the environment | ||
| segment_components = strings.Split(segment, "@") | ||
| if len(segment_components) < 2 { | ||
| gemset, err := checkEnvForRubyGemset() | ||
| if err == nil && gemset != "" { | ||
| segment = segment + "@" + gemset | ||
| } | ||
| } | ||
|
|
||
| return []pwl.Segment{{ | ||
| Name: "rvm", | ||
| Content: p.symbols.RvmIndicator + " " + segment, | ||
| Foreground: p.theme.RvmFg, | ||
| Background: p.theme.RvmBg, | ||
| }} | ||
| } |
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