2017-12-25 07:32:28 +00:00
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Self-Update Mechanism for Go Commands using GitHub
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==================================================
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2017-12-30 05:14:08 +00:00
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[![GoDoc Badge][]][GoDoc]
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[![TravisCI Status][]][TravisCI]
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[![AppVeyor Status][]][AppVeyor]
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[![Codecov Status][]][Codecov]
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2017-12-25 07:32:28 +00:00
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[go-github-selfupdate][] is a Go library to provide self-update mechanism to command line tools.
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2018-02-11 14:36:50 +00:00
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Go does not provide the way to install/update the stable version of tools. By default, Go command line
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tools are updated:
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2017-12-25 07:32:28 +00:00
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2018-03-28 02:00:13 +00:00
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1. using `go get -u`, but it is not stable because HEAD of the repository is built
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2. using system's package manager, but it is harder to release because of dpeneding on the platform
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3. downloading executables from GitHub release page, but it requires users to download and put it manually
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2017-12-25 07:32:28 +00:00
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2018-03-28 02:00:13 +00:00
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[go-github-selfupdate][] resolves the problem of 3. by detecting the latest release, downloading it and
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putting it to `$GOPATH/bin` automatically.
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2017-12-25 07:32:28 +00:00
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2018-02-11 14:36:50 +00:00
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[go-github-selfupdate][] detects the information of the latest release via [GitHub Releases API][] and
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2018-03-28 02:00:13 +00:00
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checks the current version. If newer version than itself is detected, it downloads released binary from
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GitHub and replaces itself.
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2017-12-25 07:32:28 +00:00
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2017-12-30 02:45:47 +00:00
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- Automatically detects the latest version of released binary on GitHub
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- Retrieve the proper binary for the OS and arch where the binary is running
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- Update the binary with rollback support on failure
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2017-12-30 05:14:08 +00:00
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- Tested on Linux, macOS and Windows (using Travis CI and AppVeyor)
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2017-12-31 03:14:17 +00:00
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- Many archive and compression formats are supported (zip, tar, gzip, xzip)
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2018-01-19 09:04:30 +00:00
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- Support private repositories
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- Support [GitHub Enterprise][]
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2018-11-06 15:28:06 +00:00
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- Support hash, signature validation
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2017-12-25 07:32:28 +00:00
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2017-12-30 08:40:59 +00:00
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And small wrapper CLIs are provided:
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2017-12-30 07:14:06 +00:00
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- [detect-latest-release](./cmd/detect-latest-release): Detect the latest release of given GitHub repository from command line
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2018-03-28 02:00:13 +00:00
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- [go-get-release](./cmd/go-get-release): Like `go get`, but install a release binary from GitHub instead
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2017-12-30 07:14:06 +00:00
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2018-04-17 12:51:09 +00:00
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[Slide at GoCon 2018 Spring (Japanese)](https://speakerdeck.com/rhysd/go-selfupdate-github-de-turuwozi-ji-atupudetosuru)
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2017-12-25 07:32:28 +00:00
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[go-github-selfupdate]: https://github.com/rhysd/go-github-selfupdate
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[GitHub Releases API]: https://developer.github.com/v3/repos/releases/
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2017-12-30 02:45:47 +00:00
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## Try Out Example
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2017-12-30 05:27:31 +00:00
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Example to understand what this library does is prepared as [CLI](./cmd/selfupdate-example/main.go).
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Install it at first.
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```
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2018-10-18 09:04:52 +00:00
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$ go get -u github.com/rhysd/go-github-selfupdate/cmd/selfupdate-example
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```
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And check the version by `-version`. `-help` flag is also available to know all flags.
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```
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$ selfupdate-example -version
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```
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It should show `v1.2.3`.
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Then run `-selfupdate`
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```
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$ selfupdate-example -selfupdate
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```
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It should replace itself and finally shows a message containing release notes.
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2018-02-11 14:36:50 +00:00
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Please check the binary version is updated to `v1.2.4` with `-version`. The binary is up-to-date.
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So running `-selfupdate` again only shows 'Current binary is the latest version'.
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2017-12-30 05:27:31 +00:00
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2017-12-30 06:42:13 +00:00
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### Real World Examples
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Following tools are using this library.
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- [dot-github](https://github.com/rhysd/dot-github)
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- [dotfiles](https://github.com/rhysd/dotfiles)
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2018-01-01 09:21:01 +00:00
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- [github-clone-all](https://github.com/rhysd/github-clone-all)
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2018-02-06 06:48:03 +00:00
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- [pythonbrew](https://github.com/utahta/pythonbrew)
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- [akashic](https://github.com/cowlick/akashic)
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- [butler](https://github.com/netzkern/butler)
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2017-12-30 02:45:47 +00:00
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2017-12-25 07:32:28 +00:00
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## Usage
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2017-12-30 02:45:47 +00:00
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### Code Usage
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2017-12-25 07:32:28 +00:00
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It provides `selfupdate` package.
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2017-12-30 04:12:56 +00:00
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- `selfupdate.UpdateSelf()`: Detect the latest version of itself and run self update.
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- `selfupdate.UpdateCommand()`: Detect the latest version of given repository and update given command.
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- `selfupdate.DetectLatest()`: Detect the latest version of given repository.
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2018-02-02 11:24:01 +00:00
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- `selfupdate.DetectVersion()`: Detect the user defined version of given repository.
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2017-12-30 04:12:56 +00:00
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- `selfupdate.UpdateTo()`: Update given command to the binary hosted on given URL.
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2018-04-19 08:58:07 +00:00
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- `selfupdate.Updater`: Context manager of self-update process. If you want to customize some behavior
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2018-01-19 09:04:30 +00:00
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of self-update (e.g. specify API token, use GitHub Enterprise, ...), please make an instance of
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`Updater` and use its methods.
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2017-12-30 04:12:56 +00:00
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2017-12-30 02:45:47 +00:00
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Following is the easiest way to use this package.
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2017-12-25 07:32:28 +00:00
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```go
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import (
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"log"
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2017-12-30 04:12:56 +00:00
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"github.com/blang/semver"
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2017-12-26 02:45:08 +00:00
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"github.com/rhysd/go-github-selfupdate/selfupdate"
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2017-12-25 07:32:28 +00:00
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)
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2017-12-30 02:45:47 +00:00
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const version = "1.2.3"
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func doSelfUpdate() {
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v := semver.MustParse(version)
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latest, err := selfupdate.UpdateSelf(v, "myname/myrepo")
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if err != nil {
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2017-12-30 02:45:47 +00:00
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log.Println("Binary update failed:", err)
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2017-12-25 07:32:28 +00:00
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return
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}
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2017-12-30 02:45:47 +00:00
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if latest.Version.Equals(v) {
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// latest version is the same as current version. It means current binary is up to date.
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log.Println("Current binary is the latest version", version)
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} else {
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log.Println("Successfully updated to version", latest.Version)
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2017-12-30 04:12:56 +00:00
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log.Println("Release note:\n", latest.ReleaseNotes)
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2017-12-25 07:32:28 +00:00
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}
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}
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```
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2017-12-30 04:12:56 +00:00
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Following asks user to update or not.
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```go
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import (
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"bufio"
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"github.com/blang/semver"
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"github.com/rhysd/go-github-selfupdate/selfupdate"
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"log"
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"os"
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)
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const version = "1.2.3"
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func confirmAndSelfUpdate() {
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latest, found, err := selfupdate.DetectLatest("owner/repo")
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if err != nil {
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log.Println("Error occurred while detecting version:", err)
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return
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}
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v := semver.MustParse(version)
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if !found || latest.Version.Equals(v) {
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log.Println("Current version is the latest")
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return
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}
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fmt.Print("Do you want to update to", latest.Version, "? (y/n): ")
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input, err := bufio.NewReader(os.Stdin).ReadString('\n')
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if err != nil || (input != "y\n" && input != "n\n") {
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log.Println("Invalid input")
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return
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}
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if input == "n\n" {
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return
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}
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if err := selfupdate.UpdateTo(latest.AssetURL, os.Args[0]); err != nil {
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log.Println("Error occurred while updating binary:", err)
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return
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}
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log.Println("Successfully updated to version", latest.Version)
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}
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```
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2017-12-25 07:32:28 +00:00
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2018-01-19 09:04:30 +00:00
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If GitHub API token is set to `[token]` section in `gitconfig` or `$GITHUB_TOKEN` environment variable,
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this library will use it to call GitHub REST API. It's useful when reaching rate limits or when using
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this library with private repositories.
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2017-12-25 07:32:28 +00:00
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Please see [the documentation page][GoDoc] for more detail.
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2018-01-19 09:04:30 +00:00
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This library should work with [GitHub Enterprise][]. To configure API base URL, please setup `Updater`
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instance and use its method instead (Actually all functions above are just a shortcuts of methods of
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`Updater` instance).
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Following is an example of usage with GitHub Enterprise.
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```go
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import (
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"log"
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"github.com/blang/semver"
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"github.com/rhysd/go-github-selfupdate/selfupdate"
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)
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const version = "1.2.3"
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func doSelfUpdate(token string) {
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v := semver.MustParse(version)
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up, err := selfupdate.NewUpdater(selfupdate.Config{
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APIToken: token,
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EnterpriseBaseURL: "https://github.your.company.com/api/v3",
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})
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latest, err := up.UpdateSelf(v, "myname/myrepo")
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if err != nil {
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log.Println("Binary update failed:", err)
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return
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}
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if latest.Version.Equals(v) {
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// latest version is the same as current version. It means current binary is up to date.
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log.Println("Current binary is the latest version", version)
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} else {
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log.Println("Successfully updated to version", latest.Version)
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log.Println("Release note:\n", latest.ReleaseNotes)
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}
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}
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```
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If `APIToken` field is not given, it tries to retrieve API token from `[token]` section of `.gitconfig`
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or `$GITHUB_TOKEN` environment variable. If no token is found, it raises an error because GitHub Enterprise
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API does not work without authentication.
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If your GitHub Enterprise instance's upload URL is different from the base URL, please also set `EnterpriseUploadURL`
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field
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2017-12-25 07:32:28 +00:00
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### Naming Rules of Released Binaries
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go-github-selfupdate assumes that released binaries are put for each combination of platforms and archs.
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2017-12-30 02:45:47 +00:00
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Binaries for each platform can be easily built using tools like [gox][]
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2017-12-25 07:32:28 +00:00
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2017-12-30 02:45:47 +00:00
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You need to put the binaries with the following format.
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```
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{cmd}_{goos}_{goarch}{.ext}
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```
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`{cmd}` is a name of command.
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`{goos}` and `{goarch}` are the platform and the arch type of the binary.
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2017-12-31 03:14:17 +00:00
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`{.ext}` is a file extension. go-github-selfupdate supports `.zip`, `.gzip`, `.tar.gz` and `.tar.xz`.
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2017-12-30 02:45:47 +00:00
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You can also use blank and it means binary is not compressed.
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2018-02-02 11:24:01 +00:00
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If you compress binary, uncompressed directory or file must contain the executable named `{cmd}`.
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2017-12-30 02:45:47 +00:00
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And you can also use `-` for separator instead of `_` if you like.
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For example, if your command name is `foo-bar`, one of followings is expected to be put in release
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page on GitHub as binary for platform `linux` and arch `amd64`.
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- `foo-bar_linux_amd64` (executable)
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- `foo-bar_linux_amd64.zip` (zip file containing `foo-bar`)
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- `foo-bar_linux_amd64.tar.gz` (tar file containing `foo-bar`)
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2017-12-31 03:14:17 +00:00
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- `foo-bar_linux_amd64.xz` (xzip file of the executable `foo-bar`)
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- `foo-bar-linux-amd64.tar.gz` (`-` is also ok for separator)
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2017-12-30 03:52:59 +00:00
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To archive the executable directly on Windows, `.exe` can be added before file extension like
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`foo-bar_windows_amd64.exe.zip`.
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2017-12-30 02:45:47 +00:00
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[gox]: https://github.com/mitchellh/gox
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2017-12-25 07:32:28 +00:00
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2017-12-30 02:45:47 +00:00
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### Naming Rules of Versions (=Git Tags)
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2017-12-25 07:32:28 +00:00
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2017-12-30 02:45:47 +00:00
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go-github-selfupdate searches binaries' versions via Git tag names (not a release title).
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When your tool's version is `1.2.3`, you should use the version number for tag of the Git
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repository (i.e. `1.2.3` or `v1.2.3`).
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This library assumes you adopt [semantic versioning][]. It is necessary for comparing versions
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systematically.
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Prefix before version number `\d+\.\d+\.\d+` is automatically omitted. For example, `ver1.2.3` or
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`release-1.2.3` are also ok.
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Tags which don't contain a version number are ignored (i.e. `nightly`). And releases marked as `pre-release`
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are also ignored.
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2017-12-25 07:32:28 +00:00
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2017-12-30 03:31:07 +00:00
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[semantic versioning]: https://semver.org/
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2017-12-25 07:32:28 +00:00
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### Structure of Releases
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In summary, structure of releases on GitHub looks like:
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- `v1.2.0`
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- `foo-bar-linux-amd64.tar.gz`
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- `foo-bar-linux-386.tar.gz`
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- `foo-bar-darwin-amd64.tar.gz`
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- `foo-bar-windows-amd64.zip`
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- ... (Other binaries for v1.2.0)
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- `v1.1.3`
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- `foo-bar-linux-amd64.tar.gz`
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- `foo-bar-linux-386.tar.gz`
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- `foo-bar-darwin-amd64.tar.gz`
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- `foo-bar-windows-amd64.zip`
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- ... (Other binaries for v1.1.3)
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- ... (older versions)
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2018-02-11 14:36:50 +00:00
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Tags which don't contain a version number are ignored (i.e. `nightly`). And releases marked
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as `pre-release` are also ignored.
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2017-12-30 02:45:47 +00:00
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2018-11-06 15:28:06 +00:00
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### Hash or Signature Validation
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go-github-selfupdate supports hash or signature validatiom of the downloaded files. It comes
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with support for sha256 hashes or ECDSA signatures. In addition to internal functions the
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user can implement the `Validator` interface for own validation mechanisms.
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```go
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// Validator represents an interface which enables additional validation of releases.
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type Validator interface {
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// Validate validates release bytes against an additional asset bytes.
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// See SHA2Validator or ECDSAValidator for more information.
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Validate(release, asset []byte) error
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// Suffix describes the additional file ending which is used for finding the
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// additional asset.
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Suffix() string
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}
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```
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## SHA256
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To verify the integrity by SHA256 generate a hash sum and save it within a file which has the
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same naming as original file with the suffix `.sha256`.
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For e.g. use sha256sum, the file `selfupdate/testdata/foo.zip.sha256` is generated with:
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```shell
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sha256sum foo.zip > foo.zip.sha256
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```
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## ECDSA
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To verify the signature by ECDSA generate a signature and save it within a file which has the
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same naming as original file with the suffix `.sig`.
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For e.g. use openssl, the file `selfupdate/testdata/foo.zip.sig` is generated with:
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```shell
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openssl dgst -sha256 -sign Test.pem -out foo.zip.sig foo.zip
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```
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go-github-selfupdate makes use of go internal crypto package. Therefore the used private key
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has to be compatbile with FIPS 186-3.
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2018-02-11 14:36:50 +00:00
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### Development
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#### Running tests
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All library sources are put in `/selfupdate` directory. So you can run tests as following
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at the top of the repository:
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```
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$ go test -v ./selfupdate
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```
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Some tests are not run without setting a GitHub API token because they call GitHub API too many times.
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To run them, please generate an API token and set it to an environment variable.
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```
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$ export GITHUB_TOKEN="{token generated by you}"
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$ go test -v ./selfupdate
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```
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Above command run almost all tests and it's enough to check the behavior before creating a pull request.
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Some tests are still not tested because they depend on my personal API access token, though; for repositories
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on GitHub Enterprise or private repositories on GitHub.
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#### Debugging
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2017-12-30 02:45:47 +00:00
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This library can output logs for debugging. By default, logger is disabled.
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You can enable the logger by following and can know the details of the self update.
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```go
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selfupdate.EnableLog()
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```
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2017-12-25 07:32:28 +00:00
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2018-02-11 14:36:50 +00:00
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#### CI
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Tests run on CIs (Travis CI, Appveyor) are run with the token I generated. However, because of security
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reason, it is not used for the tests for pull requests. In the tests, a GitHub API token is not set and
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API rate limit is often exceeding. So please ignore the test failures on creating a pull request.
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|
2017-12-25 07:32:28 +00:00
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## Dependencies
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|
2018-03-28 02:00:13 +00:00
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|
|
This library utilizes
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- [go-github][] to retrieve the information of releases
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- [go-update][] to replace current binary
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- [semver][] to compare versions
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- [xz][] to support XZ compress format
|
2017-12-25 07:32:28 +00:00
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|
> Copyright (c) 2013 The go-github AUTHORS. All rights reserved.
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|
> Copyright 2015 Alan Shreve
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> Copyright (c) 2014 Benedikt Lang <github at benediktlang.de>
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|
2018-03-28 02:00:13 +00:00
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|
> Copyright (c) 2014-2016 Ulrich Kunitz
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|
2017-12-25 07:32:28 +00:00
|
|
|
[go-github]: https://github.com/google/go-github
|
2017-12-26 02:48:09 +00:00
|
|
|
[go-update]: https://github.com/inconshreveable/go-update
|
2017-12-25 07:32:28 +00:00
|
|
|
[semver]: https://github.com/blang/semver
|
2018-03-28 02:00:13 +00:00
|
|
|
[xz]: https://github.com/ulikunitz/xz
|
2017-12-30 02:45:47 +00:00
|
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|
|
2017-12-30 17:19:45 +00:00
|
|
|
## What is different from [tj/go-update][]?
|
2017-12-30 02:45:47 +00:00
|
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|
|
2017-12-30 03:13:58 +00:00
|
|
|
This library goal is the same as tj/go-update, but it's different in following points.
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|
|
tj/go-update:
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|
|
|
|
|
- does not support Windows
|
|
|
|
- only allows `v` for version prefix
|
|
|
|
- does not ignore pre-release
|
|
|
|
- has [only a few tests](https://github.com/tj/go-update/blob/master/update_test.go)
|
2017-12-30 17:19:45 +00:00
|
|
|
- supports Apex store for putting releases
|
2017-12-30 02:45:47 +00:00
|
|
|
|
2017-12-30 03:55:12 +00:00
|
|
|
[tj/go-update]: https://github.com/tj/go-update
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|
|
|
|
|
|
|
## License
|
|
|
|
|
|
|
|
Distributed under the [MIT License](LICENSE)
|
2017-12-30 02:45:47 +00:00
|
|
|
|
2017-12-30 05:14:08 +00:00
|
|
|
[GoDoc Badge]: https://godoc.org/github.com/rhysd/go-github-selfupdate/selfupdate?status.svg
|
2017-12-30 03:31:07 +00:00
|
|
|
[GoDoc]: https://godoc.org/github.com/rhysd/go-github-selfupdate/selfupdate
|
2017-12-30 05:14:08 +00:00
|
|
|
[TravisCI Status]: https://travis-ci.org/rhysd/go-github-selfupdate.svg?branch=master
|
|
|
|
[TravisCI]: https://travis-ci.org/rhysd/go-github-selfupdate
|
|
|
|
[AppVeyor Status]: https://ci.appveyor.com/api/projects/status/1tpyd9q9tw3ime5u/branch/master?svg=true
|
|
|
|
[AppVeyor]: https://ci.appveyor.com/project/rhysd/go-github-selfupdate/branch/master
|
|
|
|
[Codecov Status]: https://codecov.io/gh/rhysd/go-github-selfupdate/branch/master/graph/badge.svg
|
|
|
|
[Codecov]: https://codecov.io/gh/rhysd/go-github-selfupdate
|
2018-01-19 09:04:30 +00:00
|
|
|
[GitHub Enterprise]: https://enterprise.github.com/home
|