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cmd.go
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cmd.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strconv"
"github.com/deejross/github-release/github"
)
func infocmd(opt Options) error {
user := nvls(opt.Info.User, EnvUser)
repo := nvls(opt.Info.Repo, EnvRepo)
token := nvls(opt.Info.Token, EnvToken)
tag := opt.Info.Tag
if user == "" || repo == "" {
return fmt.Errorf("user and repo need to be passed as arguments")
}
// Find regular git tags.
foundTags, err := Tags(user, repo, token)
if err != nil {
return fmt.Errorf("could not fetch tags, %v", err)
}
if len(foundTags) == 0 {
return fmt.Errorf("no tags available for %v/%v", user, repo)
}
tags := foundTags[:0]
for _, t := range foundTags {
// If the user only requested one tag, filter out the rest.
if tag == "" || t.Name == tag {
tags = append(tags, t)
}
}
renderer := renderInfoText
if opt.Info.JSON {
renderer = renderInfoJSON
}
// List releases + assets.
var releases []Release
if tag == "" {
// Get all releases.
vprintf("%v/%v: getting information for all releases\n", user, repo)
releases, err = Releases(user, repo, token)
if err != nil {
return err
}
} else {
// Get only one release.
vprintf("%v/%v/%v: getting information for the release\n", user, repo, tag)
release, err := ReleaseOfTag(user, repo, tag, token)
if err != nil {
return err
}
releases = []Release{*release}
}
return renderer(tags, releases)
}
func renderInfoText(tags []Tag, releases []Release) error {
fmt.Println("tags:")
for _, tag := range tags {
fmt.Println("-", &tag)
}
fmt.Println("releases:")
for _, release := range releases {
fmt.Println("-", &release)
}
return nil
}
func renderInfoJSON(tags []Tag, releases []Release) error {
out := struct {
Tags []Tag
Releases []Release
}{
Tags: tags,
Releases: releases,
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(&out)
}
func uploadcmd(opt Options) error {
user := nvls(opt.Upload.User, EnvUser)
repo := nvls(opt.Upload.Repo, EnvRepo)
token := nvls(opt.Upload.Token, EnvToken)
tag := opt.Upload.Tag
name := opt.Upload.Name
label := opt.Upload.Label
file := opt.Upload.File
vprintln("uploading...")
if file == nil {
return fmt.Errorf("provided file was not valid")
}
defer file.Close()
if err := ValidateCredentials(user, repo, token, tag); err != nil {
return err
}
// Find the release corresponding to the entered tag, if any.
rel, err := ReleaseOfTag(user, repo, tag, token)
if err != nil {
return err
}
// If the user has attempted to upload this asset before, someone could
// expect it to be present in the release struct (rel.Assets). However,
// we have to separately ask for the specific assets of this release.
// Reason: the assets in the Release struct do not contain incomplete
// uploads (which regrettably happen often using the Github API). See
// issue #26.
var assets []Asset
err = github.Client{Token: token, BaseURL: EnvApiEndpoint}.Get(fmt.Sprintf(ASSET_RELEASE_LIST_URI, user, repo, rel.Id), &assets)
if err != nil {
return err
}
// Incomplete (failed) uploads will have their state set to new. These
// assets are (AFAIK) useless in all cases. The only thing they will do
// is prevent the upload of another asset of the same name. To work
// around this GH API weirdness, let's just delete assets if:
//
// 1. Their state is new.
// 2. The user explicitly asked to delete/replace the asset with -R.
if asset := findAsset(assets, name); asset != nil &&
(asset.State == "new" || opt.Upload.Replace) {
vprintf("asset (id: %d) already existed in state %s: removing...\n", asset.Id, asset.Name)
if err := asset.Delete(user, repo, token); err != nil {
return fmt.Errorf("could not replace asset: %v", err)
}
}
v := url.Values{}
v.Set("name", name)
if label != "" {
v.Set("label", label)
}
url := rel.CleanUploadUrl() + "?" + v.Encode()
resp, err := github.DoAuthRequest("POST", url, "application/octet-stream",
token, nil, file)
if err != nil {
return fmt.Errorf("can't create upload request to %v, %v", url, err)
}
defer resp.Body.Close()
vprintln("RESPONSE:", resp)
var r io.Reader = resp.Body
if VERBOSITY != 0 {
r = io.TeeReader(r, os.Stderr)
}
var asset *Asset
// For HTTP status 201 and 502, Github will return a JSON encoding of
// the (partially) created asset.
if resp.StatusCode == http.StatusBadGateway || resp.StatusCode == http.StatusCreated {
vprintf("ASSET: ")
asset = new(Asset)
if err := json.NewDecoder(r).Decode(&asset); err != nil {
return fmt.Errorf("upload failed (%s), could not unmarshal asset (err: %v)", resp.Status, err)
}
} else {
vprintf("BODY: ")
if msg, err := ToMessage(r); err == nil {
return fmt.Errorf("could not upload, status code (%s), %v",
resp.Status, msg)
}
return fmt.Errorf("could not upload, status code (%s)", resp.Status)
}
if resp.StatusCode == http.StatusBadGateway {
// 502 means the upload failed, but GitHub still retains metadata
// (an asset in state "new"). Attempt to delete that now since it
// would clutter the list of release assets.
vprintf("asset (id: %d) failed to upload, it's now in state %s: removing...\n", asset.Id, asset.Name)
if err := asset.Delete(user, repo, token); err != nil {
return fmt.Errorf("upload failed (%s), could not delete partially uploaded asset (ID: %d, err: %v) in order to cleanly reset GH API state, please try again", resp.Status, asset.Id, err)
}
return fmt.Errorf("could not upload, status code (%s)", resp.Status)
}
return nil
}
func downloadcmd(opt Options) error {
user := nvls(opt.Download.User, EnvUser)
repo := nvls(opt.Download.Repo, EnvRepo)
token := nvls(opt.Download.Token, EnvToken)
tag := opt.Download.Tag
name := opt.Download.Name
latest := opt.Download.Latest
vprintln("downloading...")
if err := ValidateTarget(user, repo, tag, latest); err != nil {
return err
}
// Find the release corresponding to the entered tag, if any.
var rel *Release
var err error
if latest {
rel, err = LatestRelease(user, repo, token)
} else {
rel, err = ReleaseOfTag(user, repo, tag, token)
}
if err != nil {
return err
}
asset := findAsset(rel.Assets, name)
if asset == nil {
return fmt.Errorf("coud not find asset named %s", name)
}
var resp *http.Response
if token == "" {
// Use the regular github.com site if we don't have a token.
resp, err = http.Get("https://github.com" + fmt.Sprintf("/%s/%s/releases/download/%s/%s", user, repo, tag, name))
} else {
url := nvls(EnvApiEndpoint, github.DefaultBaseURL) + fmt.Sprintf(ASSET_URI, user, repo, asset.Id)
resp, err = github.DoAuthRequest("GET", url, "", token, map[string]string{
"Accept": "application/octet-stream",
}, nil)
}
if err != nil {
return fmt.Errorf("could not fetch releases, %v", err)
}
defer resp.Body.Close()
vprintln("GET", resp.Request.URL, "->", resp)
contentLength, err := strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 64)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("github did not respond with 200 OK but with %v", resp.Status)
}
out := os.Stdout // Pipe the asset to stdout by default.
if isCharDevice(out) {
// If stdout is a char device, assume it's a TTY (terminal). In this
// case, don't pipe th easset to stdout, but create it as a file in
// the current working folder.
if out, err = os.Create(name); err != nil {
return fmt.Errorf("could not create file %s", name)
}
defer out.Close()
}
return mustCopyN(out, resp.Body, contentLength)
}
// mustCopyN attempts to copy exactly N bytes, if this fails, an error is
// returned.
func mustCopyN(w io.Writer, r io.Reader, n int64) error {
an, err := io.Copy(w, r)
if an != n {
return fmt.Errorf("data did not match content length %d != %d", an, n)
}
return err
}
func ValidateTarget(user, repo, tag string, latest bool) error {
if user == "" {
return fmt.Errorf("empty user")
}
if repo == "" {
return fmt.Errorf("empty repo")
}
if tag == "" && !latest {
return fmt.Errorf("empty tag")
}
return nil
}
func ValidateCredentials(user, repo, token, tag string) error {
if err := ValidateTarget(user, repo, tag, false); err != nil {
return err
}
if token == "" {
return fmt.Errorf("empty token")
}
return nil
}
func releasecmd(opt Options) error {
cmdopt := opt.Release
user := nvls(cmdopt.User, EnvUser)
repo := nvls(cmdopt.Repo, EnvRepo)
token := nvls(cmdopt.Token, EnvToken)
tag := cmdopt.Tag
name := nvls(cmdopt.Name, tag)
desc := nvls(cmdopt.Desc, tag)
target := nvls(cmdopt.Target)
draft := cmdopt.Draft
prerelease := cmdopt.Prerelease
vprintln("releasing...")
if err := ValidateCredentials(user, repo, token, tag); err != nil {
return err
}
// Check if we need to read the description from stdin.
if desc == "-" {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return fmt.Errorf("could not read description from stdin: %v", err)
}
desc = string(b)
}
params := ReleaseCreate{
TagName: tag,
TargetCommitish: target,
Name: name,
Body: desc,
Draft: draft,
Prerelease: prerelease,
}
/* encode params as json */
payload, err := json.Marshal(params)
if err != nil {
return fmt.Errorf("can't encode release creation params, %v", err)
}
reader := bytes.NewReader(payload)
URL := nvls(EnvApiEndpoint, github.DefaultBaseURL) + fmt.Sprintf("/repos/%s/%s/releases", user, repo)
resp, err := github.DoAuthRequest("POST", URL, "application/json", token, nil, reader)
if err != nil {
return fmt.Errorf("while submitting %v, %v", string(payload), err)
}
defer resp.Body.Close()
vprintln("RESPONSE:", resp)
if resp.StatusCode != http.StatusCreated {
if resp.StatusCode == 422 {
return fmt.Errorf("github returned %v (this is probably because the release already exists)",
resp.Status)
}
return fmt.Errorf("github returned %v", resp.Status)
}
if VERBOSITY != 0 {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("error while reading response, %v", err)
}
vprintln("BODY:", string(body))
}
return nil
}
func editcmd(opt Options) error {
cmdopt := opt.Edit
user := nvls(cmdopt.User, EnvUser)
repo := nvls(cmdopt.Repo, EnvRepo)
token := nvls(cmdopt.Token, EnvToken)
tag := cmdopt.Tag
name := nvls(cmdopt.Name, tag)
desc := nvls(cmdopt.Desc, tag)
draft := cmdopt.Draft
prerelease := cmdopt.Prerelease
vprintln("editing...")
if err := ValidateCredentials(user, repo, token, tag); err != nil {
return err
}
id, err := IdOfTag(user, repo, tag, token)
if err != nil {
return err
}
vprintf("release %v has id %v\n", tag, id)
// Check if we need to read the description from stdin.
if desc == "-" {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return fmt.Errorf("could not read description from stdin: %v", err)
}
desc = string(b)
}
/* the release create struct works for editing releases as well */
params := ReleaseCreate{
TagName: tag,
Name: name,
Body: desc,
Draft: draft,
Prerelease: prerelease,
}
/* encode the parameters as JSON, as required by the github API */
payload, err := json.Marshal(params)
if err != nil {
return fmt.Errorf("can't encode release creation params, %v", err)
}
URL := nvls(EnvApiEndpoint, github.DefaultBaseURL) + fmt.Sprintf("/repos/%s/%s/releases/%d", user, repo, id)
resp, err := github.DoAuthRequest("PATCH", URL, "application/json", token, nil, bytes.NewReader(payload))
if err != nil {
return fmt.Errorf("while submitting %v, %v", string(payload), err)
}
defer resp.Body.Close()
vprintln("RESPONSE:", resp)
if resp.StatusCode != http.StatusOK {
if resp.StatusCode == 422 {
return fmt.Errorf("github returned %v (this is probably because the release already exists)",
resp.Status)
}
return fmt.Errorf("github returned unexpected status code %v", resp.Status)
}
if VERBOSITY != 0 {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("error while reading response, %v", err)
}
vprintln("BODY:", string(body))
}
return nil
}
func deletecmd(opt Options) error {
user, repo, token, tag := nvls(opt.Delete.User, EnvUser),
nvls(opt.Delete.Repo, EnvRepo),
nvls(opt.Delete.Token, EnvToken),
opt.Delete.Tag
vprintln("deleting...")
id, err := IdOfTag(user, repo, tag, token)
if err != nil {
return err
}
vprintf("release %v has id %v\n", tag, id)
baseURL := nvls(EnvApiEndpoint, github.DefaultBaseURL)
resp, err := github.DoAuthRequest("DELETE", baseURL+fmt.Sprintf("/repos/%s/%s/releases/%d",
user, repo, id), "application/json", token, nil, nil)
if err != nil {
return fmt.Errorf("release deletion failed: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusNoContent {
return fmt.Errorf("could not delete the release corresponding to tag %s on repo %s/%s",
tag, user, repo)
}
return nil
}