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generate.go
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generate.go
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// Copyright (c) 2020 BlockDev AG
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
package env
import (
"fmt"
"os"
"path/filepath"
"strconv"
"strings"
"time"
git "github.com/go-git/go-git/v5"
"github.com/mysteriumnetwork/go-ci/github"
"github.com/pkg/errors"
)
// EnvVar represents an environment variable's value.
type EnvVar struct {
Key BuildVar
Val string
}
var buildTime = time.Now().UTC()
// GenerateEnvFile for sourcing in other stages
func GenerateEnvFile() error {
version, err := buildVersion()
if err != nil {
return err
}
vars := []EnvVar{
{TagBuild, strconv.FormatBool(isTag())},
{RCBuild, strconv.FormatBool(isRC())},
{SnapshotBuild, strconv.FormatBool(isSnapshot())},
{PRBuild, strconv.FormatBool(isPR())},
{BuildVersion, version},
{BuildNumber, Str(BuildNumber)},
{GithubOwner, Str(GithubOwner)},
{GithubRepository, Str(GithubRepository)},
{GithubSnapshotRepository, Str(GithubSnapshotRepository)},
}
return WriteEnvVars(vars, "./build/env.sh")
}
func isTag() bool {
return Str(BuildTag) != ""
}
func isRC() bool {
return strings.Contains(Str(BuildTag), "-rc")
}
func isSnapshot() bool {
return Str(BuildBranch) == "master" && !isTag()
}
func isPR() bool {
return !isSnapshot() && !isTag()
}
func buildVersion() (string, error) {
if isTag() {
return Str(BuildTag), EnsureEnvVars(BuildTag)
}
if isPR() {
previousReleaseTagName, err := latestReleaseTagName()
if err != nil {
return "", err
}
return fmt.Sprintf("%s-1branch-%.10s-1", previousReleaseTagName, Str(BuildBranchSafe)), nil
}
return snapshotVersion()
}
func snapshotVersion() (string, error) {
previousReleaseTagName, err := latestReleaseTagName()
if err != nil {
return "", err
}
gitLocalRepo, err := git.PlainOpen("./")
if err != nil {
return "", err
}
gitHead, err := gitLocalRepo.Head()
if err != nil {
return "", err
}
return fmt.Sprintf("%s-1snapshot-%s-%s",
previousReleaseTagName,
buildTime.Format("20060102T1504"),
gitHead.Hash().String()[:8]), nil
}
func latestReleaseTagName() (string, error) {
if err := EnsureEnvVars(GithubOwner, GithubRepository, GithubAPIToken); err != nil {
return "", err
}
releaser, err := github.NewReleaser(Str(GithubOwner), Str(GithubRepository), Str(GithubAPIToken))
if err != nil {
return "", err
}
latestRelease, err := releaser.Latest()
if err != nil {
return "", err
} else if latestRelease == nil {
return "", errors.Errorf("could not find latest release in githubRepo %s/%s", Str(GithubOwner), Str(GithubRepository))
}
return latestRelease.TagName, nil
}
// WriteEnvVars writes vars to a shell script so they can be sourced `source env.sh` in latter build stages
func WriteEnvVars(vars []EnvVar, filename string) error {
err := os.MkdirAll(filepath.Dir(filename), 0755)
if err != nil {
return err
}
file, err := os.Create(filename)
if err != nil {
return err
}
defer file.Close()
for _, v := range vars {
_, err := fmt.Fprintf(file, "export %s=%s;\n", v.Key, v.Val)
if err != nil {
return err
}
}
return nil
}