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detector.go
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detector.go
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package source
import (
"os"
"path/filepath"
)
// Info is detected platform information from a source directory
type Info struct {
Platform string
Version string
}
// DetectorFunc is a function that returns source Info from a given directory.
// It returns true if it was able to detect the code in the given directory.
type DetectorFunc func(dir string) (*Info, bool)
// Detectors is a set of DetectorFunc that is used to detect the
// language/platform for a given source directory
type Detectors []DetectorFunc
// DefafultDetectors is a default set of Detector functions
var DefaultDetectors = Detectors{
DetectRuby,
DetectJava,
DetectNodeJS,
DetectPHP,
DetectPython,
DetectPerl,
DetectScala,
}
type sourceDetector struct {
detectors []DetectorFunc
}
// DetectSource returns source information from a given directory using
// a set of Detectors
func (s Detectors) DetectSource(dir string) (*Info, bool) {
for _, d := range s {
if info, found := d(dir); found {
return info, true
}
}
return nil, false
}
// DetectRuby detects Ruby source
func DetectRuby(dir string) (*Info, bool) {
return detect("ruby", dir, "Gemfile", "Rakefile", "config.ru")
}
// DetectJava detects Java source
func DetectJava(dir string) (*Info, bool) {
return detect("jee", dir, "pom.xml")
}
// DetectNodeJS detects NodeJS source
func DetectNodeJS(dir string) (*Info, bool) {
return detect("nodejs", dir, "app.json", "package.json")
}
// DetectPHP detects PHP source
func DetectPHP(dir string) (*Info, bool) {
return detect("php", dir, "index.php", "composer.json")
}
// DetectPython detects Python source
func DetectPython(dir string) (*Info, bool) {
return detect("python", dir, "requirements.txt", "config.py")
}
// DetectPerl detects Perl source
func DetectPerl(dir string) (*Info, bool) {
return detect("perl", dir, "index.pl", "cpanfile")
}
// DetectScala detects Scala source
func DetectScala(dir string) (*Info, bool) {
return detect("scala", dir, "build.sbt")
}
// detect returns an Info object with the given platform if the source at dir contains any of the argument files
func detect(platform string, dir string, files ...string) (*Info, bool) {
if filesPresent(dir, files) {
return &Info{
Platform: platform,
}, true
}
return nil, false
}
func filesPresent(dir string, files []string) bool {
for _, f := range files {
_, err := os.Stat(filepath.Join(dir, f))
if err == nil {
return true
}
}
return false
}