github-release/cmd.go at master · github-release/github-release · GitHub

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package main

import (

"bytes"

"encoding/json"

"fmt"

"io"

"io/ioutil"

"net/http"

"net/url"

"os"

"strconv"

"github.com/github-release/github-release/github"

)

func infocmd(opt Options) error {

user := nvls(opt.Info.User, EnvUser)

authUser := nvls(opt.Info.AuthUser, EnvAuthUser)

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, authUser, 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, authUser, 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, authUser, 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)

authUser := nvls(opt.Upload.AuthUser, EnvAuthUser)

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, authUser, 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

client := github.NewClient(authUser, token, nil)

client.SetBaseURL(EnvApiEndpoint)

err = client.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)

authUser := nvls(opt.Download.AuthUser, EnvAuthUser)

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, authUser, token)

} else {

rel, err = ReleaseOfTag(user, repo, tag, authUser, 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 := cmdopt.Name

desc := cmdopt.Desc

target := nvls(cmdopt.Target)

draft := cmdopt.Draft

prerelease := cmdopt.Prerelease

generateReleaseNotes := cmdopt.GenerateReleaseNotes

if !generateReleaseNotes {

name = nvls(name, tag)

desc = nvls(desc, tag)

}

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,

GenerateReleaseNotes: generateReleaseNotes,

}

/* 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)

// NB: Github appears to ignore the user here - the only thing that seems to

// matter is that the token is valid.

client := github.NewClient(user, token, nil)

client.SetBaseURL(EnvApiEndpoint)

req, err := client.NewRequest("POST", fmt.Sprintf("/repos/%s/%s/releases", user, repo), reader)

if err != nil {

return fmt.Errorf("while submitting %v: %w", string(payload), err)

}

resp, err := client.Do(req)

if err != nil {

return fmt.Errorf("while submitting %v: %w", 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)

authUser := nvls(cmdopt.AuthUser, EnvAuthUser)

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, authUser, 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

authUser := nvls(opt.Delete.AuthUser, EnvAuthUser)

vprintln("deleting...")

id, err := IdOfTag(user, repo, tag, authUser, 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

}

github-release/cmd.go at master · github-release/github-release · GitHub

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