Adding upstream version 1.2.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

selfupdate/doc.go

@@ -0,0 +1,38 @@
+/*
+Package selfupdate provides self-update mechanism to Go command line tools.
+
+Go does not provide the way to install/update the stable version of tools. By default, Go command line tools are updated
+
+- using `go get -u` (updating to HEAD)
+- using system's package manager (depending on the platform)
+- downloading executables from GitHub release page manually
+
+By using this library, you will get 4th choice:
+
+- from your command line tool directly (and automatically)
+
+go-github-selfupdate detects the information of the latest release via GitHub Releases API and check the current version.
+If newer version than itself is detected, it downloads released binary from GitHub and replaces itself.
+
+- Automatically detects the latest version of released binary on GitHub
+- Retrieve the proper binary for the OS and arch where the binary is running
+- Update the binary with rollback support on failure
+- Tested on Linux, macOS and Windows
+- Many archive and compression formats are supported (zip, gzip, xzip, tar)
+
+There are some naming rules. Please read following links.
+
+Naming Rules of Released Binaries:
+  https://github.com/rhysd/go-github-selfupdate#naming-rules-of-released-binaries
+
+Naming Rules of Git Tags:
+  https://github.com/rhysd/go-github-selfupdate#naming-rules-of-git-tags
+
+This package is hosted on GitHub:
+  https://github.com/rhysd/go-github-selfupdate
+
+Small CLI tools as wrapper of this library are available also:
+  https://github.com/rhysd/go-github-selfupdate/cmd/detect-latest-release
+  https://github.com/rhysd/go-github-selfupdate/cmd/go-get-release
+*/
+package selfupdate