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//+build mage
package main
import (
"bytes"
"errors"
"fmt"
"os"
"time"
"github.com/magefile/mage/sh"
)
// Runs "go install" for mage. This generates the version info the binary.
func Build() error {
ldf, err := flags()
if err != nil {
return err
}
return sh.Run("go", "install", "-ldflags="+ldf, "github.com/magefile/mage")
}
// Generates a new release. Expects the TAG environment variable to be set,
// which will create a new tag with that name.
func Release() (err error) {
if os.Getenv("TAG") == "" {
return errors.New("MSG and TAG environment variables are required")
}
if err := sh.RunV("git", "tag", "-a", "$TAG"); err != nil {
return err
}
if err := sh.RunV("git", "push", "origin", "$TAG"); err != nil {
return err
}
defer func() {
if err != nil {
sh.RunV("git", "tag", "--delete", "$TAG")
sh.RunV("git", "push", "--delete", "origin", "$TAG")
}
}()
return sh.RunV("goreleaser")
}
// Remove the temporarily generated files from Release.
func Clean() error {
return sh.Rm("dist")
}
func flags() (string, error) {
timestamp := time.Now().Format(time.RFC3339)
hash := hash()
tag := tag()
if tag == "" {
tag = "dev"
}
return fmt.Sprintf(`-X "github.com/magefile/mage/mage.timestamp=%s" -X "github.com/magefile/mage/mage.commitHash=%s" -X "github.com/magefile/mage/mage.gitTag=%s"`, timestamp, hash, tag), nil
}
// tag returns the git tag for the current branch or "" if none.
func tag() string {
buf := &bytes.Buffer{}
_, _ = sh.Exec(nil, buf, nil, "git", "describe", "--tags")
return buf.String()
}
// hash returns the git hash for the current repo or "" if none.
func hash() string {
hash, _ := sh.Output("git", "rev-parse", "--short", "HEAD")
return hash
}
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