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main.go
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main.go
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/*
* Copyright 2018-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"context"
"fmt"
"net/http"
"os"
"regexp"
"github.com/google/go-github/v32/github"
"golang.org/x/oauth2"
"github.com/paketo-buildpacks/pipeline-builder/actions"
)
func main() {
inputs := actions.NewInputs()
o, ok := inputs["owner"]
if !ok {
panic(fmt.Errorf("owner must be specified"))
}
r, ok := inputs["repository"]
if !ok {
panic(fmt.Errorf("repository must be specified"))
}
var (
err error
g *regexp.Regexp
)
if s, ok := inputs["glob"]; ok {
g, err = regexp.Compile(s)
if err != nil {
panic(fmt.Errorf("unable to compile %s as a regexp\n%w", s, err))
}
} else {
g = regexp.MustCompile(".+")
}
t := `v?([^v].*)`
if s, ok := inputs["tag_filter"]; ok {
t = s
}
var c *http.Client
if s, ok := inputs["token"]; ok {
c = oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(&oauth2.Token{AccessToken: s}))
}
gh := github.NewClient(c)
versions := make(actions.Versions)
re, err := regexp.Compile(t)
if err != nil {
panic(fmt.Errorf("%s is not a valid regex", t))
}
opt := &github.ListOptions{PerPage: 100}
for {
rel, rsp, err := gh.Repositories.ListReleases(context.Background(), o, r, opt)
if err != nil {
panic(fmt.Errorf("unable to list existing releases for %s/%s\n%w", o, r, err))
}
for _, r := range rel {
if *r.Prerelease {
continue
}
if p := re.FindStringSubmatch(*r.TagName); p != nil {
for _, a := range r.Assets {
if g.MatchString(*a.Name) {
n, err := actions.NormalizeVersion(p[1])
if err != nil {
panic(err)
}
versions[n] = *a.BrowserDownloadURL
break
}
}
}
}
if rsp.NextPage == 0 {
break
}
opt.Page = rsp.NextPage
}
if o, err := versions.GetLatest(inputs); err != nil {
panic(err)
} else {
o.Write(os.Stdout)
}
}