/
github.go
261 lines (237 loc) · 6.53 KB
/
github.go
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// Copyright (c) 2018 Dean Jackson <deanishe@deanishe.net>
// MIT Licence - http://opensource.org/licenses/MIT
package update
import (
"encoding/json"
"errors"
"fmt"
"log"
"path/filepath"
"regexp"
"sort"
aw "github.com/deanishe/awgo"
)
const ghBaseURL = "https://api.github.com/repos/"
var rxWorkflowFile = regexp.MustCompile(`\.alfred(\d+)?workflow$`)
/*
// GitHub is a Workflow Option. It sets a Workflow Updater for the specified GitHub repo.
// Repo name should be of the form "username/repo", e.g. "deanishe/alfred-ssh".
func GitHub(repo string) aw.Option {
return func(wf *aw.Workflow) aw.Option {
v, _ := NewSemVer(wf.Version())
u, _ := New(v,
&gitHubReleaser{Repo: repo, fetch: getURL},
filepath.Join(wf.CacheDir(), "_aw/update"),
)
return aw.Update(u)(wf)
}
}
*/
// GitHub2is a Workflow Option. It sets a Workflow Updater for the specified GitHub repo.
// Repo name should be of the form "username/repo", e.g. "deanishe/alfred-ssh".
func GitHub(repo string) aw.Option {
return func(wf *aw.Workflow) aw.Option {
u, _ := NewUpdater(
&githubSource{Repo: repo, fetch: getURL},
wf.Version(),
filepath.Join(wf.CacheDir(), "_aw/update"),
)
return aw.Update(u)(wf)
}
}
type githubSource struct {
Repo string
dls []Download
fetch func(URL string) ([]byte, error)
}
// Downloads implements Source.
func (src *githubSource) Downloads() ([]Download, error) {
if src.dls == nil {
src.dls = []Download{}
// rels := []*Release{}
js, err := src.fetch(src.url())
if err != nil {
// log.Printf("error: fetch GitHub releases: %s", err)
return nil, err
}
// log.Printf("%d bytes of JSON", len(js))
if src.dls, err = parseGitHubReleases(js); err != nil {
// log.Printf("error: parse GitHub releases: %s", err)
return nil, err
}
}
log.Printf("%d download(s) in repo %s", len(src.dls), src.Repo)
return src.dls, nil
}
// url returns URL of releases list.
func (src *githubSource) url() string { return fmt.Sprintf("%s%s/releases", ghBaseURL, src.Repo) }
/*
// gitHubReleaser updates from a GitHub repo's releases. Repo should be in
// the form "username/reponame", e.g. "deanishe/alfred-ssh". Releases
// are marked as pre-releases based on the "This is a pre-release"
// checkbox on the website, *not* the version number/tag.
type gitHubReleaser struct {
Repo string // Repo name in form username/repo
releases []*Release // GitHub releases for Repo
fetch func(URL string) ([]byte, error)
}
// Releases implements Releaser. Returns a slice of available releases that
// contain an .alfredworkflow file.
func (gh *gitHubReleaser) Releases() ([]*Release, error) {
if gh.releases == nil {
gh.releases = []*Release{}
// rels := []*Release{}
js, err := gh.fetch(gh.url())
if err != nil {
log.Printf("Error fetching GitHub releases: %s", err)
return nil, err
}
// log.Printf("%d bytes of JSON", len(js))
rels, err := parseGitHubReleases(js)
if err != nil {
log.Printf("Error parsing GitHub releases: %s", err)
return nil, err
}
gh.releases = rels
}
log.Printf("%d release(s) in repo %s", len(gh.releases), gh.Repo)
return gh.releases, nil
}
func (gh *gitHubReleaser) url() string { return fmt.Sprintf("%s%s/releases", ghBaseURL, gh.Repo) }
*/
// ghRelease is the data model for GitHub releases JSON.
type ghRelease struct {
Name string `json:"name"`
Prerelease bool `json:"prerelease"`
Assets []*ghAsset `json:"assets"`
Tag string `json:"tag_name"`
}
// ghAsset is the data model for GitHub releases JSON.
type ghAsset struct {
Name string `json:"name"`
URL string `json:"browser_download_url"`
MinAlfredVersion SemVer `json:"-"`
}
// parseGitHubReleases parses GitHub releases JSON.
func parseGitHubReleases(js []byte) ([]Download, error) {
var (
dls = []Download{}
rels = []*ghRelease{}
)
if err := json.Unmarshal(js, &rels); err != nil {
return nil, err
}
for _, r := range rels {
if len(r.Assets) == 0 {
continue
}
v, err := NewSemVer(r.Tag)
if err != nil {
log.Printf("ignored release %s: not semantic: %v", r.Tag, err)
continue
}
var all []Download
for _, a := range r.Assets {
m := rxWorkflowFile.FindStringSubmatch(a.Name)
if len(m) != 2 {
log.Printf("ignored release %s: no workflow files", r.Tag)
continue
}
w := Download{
URL: a.URL,
Filename: a.Name,
Version: v,
Prerelease: r.Prerelease,
}
all = append(all, w)
}
if err := validRelease(all); err != nil {
log.Printf("ignored release %s: %v", r.Tag, err)
continue
}
dls = append(dls, all...)
}
sort.Sort(sort.Reverse(byVersion(dls)))
return dls, nil
}
// Reject releases that contain multiple files with the same extension.
func validRelease(dls []Download) error {
if len(dls) == 0 {
return errors.New("empty slice")
}
dupes := map[string]int{}
for _, dl := range dls {
x := filepath.Ext(dl.Filename)
dupes[x] = dupes[x] + 1
}
for x, n := range dupes {
if n > 1 {
return fmt.Errorf("multiple files with extension %q", x)
}
}
return nil
}
/*
// parseGitHubReleases parses GitHub releases JSON.
func parseGitHubReleases(js []byte) ([]*Release, error) {
ghrels := []*ghRelease{}
rels := []*Release{}
if err := json.Unmarshal(js, &ghrels); err != nil {
return nil, err
}
for _, ghr := range ghrels {
r, err := ghReleaseToRelease(ghr)
if err != nil {
log.Printf("invalid release: %s", err)
} else {
rels = append(rels, r)
}
}
return rels, nil
}
func ghReleaseToRelease(ghr *ghRelease) (*Release, error) {
r := &Release{Prerelease: ghr.Prerelease}
// Check version
v, err := NewSemVer(ghr.Tag)
if err != nil {
return nil, fmt.Errorf("invalid version/tag %q: %s", ghr.Tag, err)
}
r.Version = v
// Check files (assets)
assets := []*ghAsset{}
dupes := map[string]int{}
for _, a := range ghr.Assets {
m := rxWorkflowFile.FindStringSubmatch(a.Name)
if len(m) != 2 {
continue
}
v, _ := NewSemVer(m[1])
a.MinAlfredVersion = v
dupes[v.String()] = dupes[v.String()] + 1
assets = append(assets, a)
}
// Reject bad releases
for s, n := range dupes {
if n > 1 {
return nil, fmt.Errorf("multiple workflow files with extension %q in release %s", s, ghr.Tag)
}
}
if len(assets) == 0 {
return nil, fmt.Errorf("no workflow files in release %s", ghr.Tag)
}
r.Files = make([]File, len(assets))
for i, a := range assets {
u, err := url.Parse(a.URL)
if err != nil {
return nil, err
}
r.Files[i] = File{
Filename: a.Name,
URL: u,
MinVersion: a.MinAlfredVersion,
}
}
sort.Sort(sort.Reverse(Files(r.Files)))
return r, nil
}
*/