/
gen.go
166 lines (136 loc) · 3.28 KB
/
gen.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"log"
"net/url"
"os"
"sort"
"text/template"
"time"
"github.com/hashicorp/go-cleanhttp"
"github.com/hashicorp/go-version"
)
var baseURL = "https://api.releases.hashicorp.com/v1"
type release struct {
Version *version.Version `json:"version"`
Created *time.Time `json:"timestamp_created"`
}
func main() {
var writePath string
flag.StringVar(&writePath, "w", "", "Path to write to")
flag.Parse()
output := os.Stdout
if writePath != "" {
f, err := os.OpenFile(writePath, os.O_RDWR|os.O_CREATE, 0o755)
if err != nil {
log.Fatal(err)
}
output = f
}
releases, err := GetTerraformReleases()
if err != nil {
log.Fatal(err)
}
sort.SliceStable(releases, func(i, j int) bool {
return releases[i].Version.GreaterThan(releases[j].Version)
})
outputTpl := `// Code generated by "versiongen"; DO NOT EDIT.
package schema
import (
"github.com/hashicorp/go-version"
)
var (
OldestAvailableVersion = version.Must(version.NewVersion("{{ .OldestVersion }}"))
LatestAvailableVersion = version.Must(version.NewVersion("{{ .LatestVersion }}"))
terraformVersions = version.Collection{
{{- range .Releases }}
version.Must(version.NewVersion("{{ .Version }}")),
{{- end }}
}
)
`
tpl, err := template.New("output").Parse(outputTpl)
if err != nil {
log.Fatal(err)
}
type data struct {
Releases []release
OldestVersion *version.Version
LatestVersion *version.Version
}
// we keep this hard-coded to 0.12 since
// we don't have schema for older versions
oldestVersion := version.Must(version.NewVersion("0.12.0"))
latestVersion, err := firstStableVersion(releases)
if err != nil {
log.Fatal(err)
}
err = tpl.Execute(output, data{
Releases: releases,
LatestVersion: latestVersion,
OldestVersion: oldestVersion,
})
if err != nil {
log.Fatal(err)
}
}
func firstStableVersion(releases []release) (*version.Version, error) {
for _, release := range releases {
if release.Version.Prerelease() == "" {
return release.Version, nil
}
}
return nil, fmt.Errorf("unable to find stable version in %d given releases", len(releases))
}
func GetTerraformReleases() ([]release, error) {
releases := make([]release, 0)
var after *time.Time
for {
r, err := getTerraformReleasesAfter(after)
if err != nil {
return releases, err
}
if len(r) == 0 {
break
}
releases = append(releases, r...)
after = r[len(r)-1].Created
}
return releases, nil
}
func getTerraformReleasesAfter(after *time.Time) ([]release, error) {
u, err := url.Parse(fmt.Sprintf("%s/releases/%s", baseURL, "terraform"))
if err != nil {
return nil, err
}
params := u.Query()
params.Set("limit", "20")
if after != nil {
params.Set("after", after.Format(time.RFC3339))
}
u.RawQuery = params.Encode()
client := cleanhttp.DefaultClient()
log.Printf("calling %q", u.String())
resp, err := client.Get(u.String())
if err != nil {
return nil, err
}
if resp.StatusCode != 200 {
return nil, fmt.Errorf("server returned %q", resp.Status)
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var releases []release
err = json.Unmarshal(b, &releases)
if err != nil {
return nil, err
}
return releases, nil
}