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banner.go
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banner.go
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package main
import (
"io"
"io/ioutil"
"os"
"runtime"
"text/template"
"time"
)
type vars struct {
GoVersion string
GOOS string
GOARCH string
NumCPU int
GOPATH string
GOROOT string
Compiler string
BeeVersion string
BeegoVersion string
}
// Now returns the current local time in the specified layout
func Now(layout string) string {
return time.Now().Format(layout)
}
// InitBanner loads the banner and prints it to output
// All errors are ignored, the application will not
// print the banner in case of error.
func InitBanner(out io.Writer, in io.Reader) {
if in == nil {
ColorLog("[ERRO] The input is nil\n")
os.Exit(2)
}
banner, err := ioutil.ReadAll(in)
if err != nil {
ColorLog("[ERRO] Error trying to read the banner\n")
ColorLog("[HINT] %v\n", err)
os.Exit(2)
}
show(out, string(banner))
}
func show(out io.Writer, content string) {
t, err := template.New("banner").
Funcs(template.FuncMap{"Now": Now}).
Parse(content)
if err != nil {
ColorLog("[ERRO] Cannot parse the banner template\n")
ColorLog("[HINT] %v\n", err)
os.Exit(2)
}
err = t.Execute(out, vars{
runtime.Version(),
runtime.GOOS,
runtime.GOARCH,
runtime.NumCPU(),
os.Getenv("GOPATH"),
runtime.GOROOT(),
runtime.Compiler,
version,
getBeegoVersion(),
})
if err != nil {
panic(err)
}
}