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loop/docs/release.md
Boris Nagaev 2464e942ec
release.sh: use git describe --abbrev=10 
Without --abbrev flag it may produce different number of hash characters
on different instances. It depends on the state of Git repo itself.
2025-09-29 11:27:25 -03:00

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Reproducible Builds

Building with Docker

To create a Loop release with binaries that are identical to an official release, run the following command (available since release v0.31.3-beta):

make docker-release tag=<tag-of-release>

This command will create a directory named loop-<tag-of-release> containing the source archive, vendored dependencies, and the built binaries packaged in .tar.gz or .zip format. It also creates a manifest file with SHA-256 checksums for all release files.

For example:

make docker-release tag=v0.31.3-beta

This will create the release artifacts in the loop-v0.31.3-beta directory.

If you want to build from an untagged commit, first check it out, then use the output of git describe --abbrev=10 as the tag:

git describe --abbrev=10
# v0.31.2-beta-135-g35d0fa26ac

make docker-release tag=v0.31.2-beta-135-g35d0fa26ac

You can filter the target platforms to speed up the build process. For example, to build only for linux-amd64:

make docker-release buildsys=linux-amd64 tag=v0.31.3-beta

Or for multiple platforms:

make docker-release buildsys='linux-amd64 windows-amd64' tag=v0.31.3-beta

Note: inside Docker the current directory is mapped as /repo and it might mention /repo as parts of file paths.

Building on the Host

You can also build a release on your host system without Docker. You will need to install the Go version specified in the go.mod file, as well as a few other tools:

sudo apt-get install build-essential git make zip perl gpg

Add GPG key of Alex Bosworth to verify release tag signature:

gpg --keyserver keys.openpgp.org --recv-keys DE23E73BFA8A0AD5587D2FCDE80D2F3F311FD87E

Then, run the release.sh script directly:

./release.sh <tag-of-release>

To filter the target platforms, pass them as a space-separated list in the LOOPBUILDSYS environment variable:

LOOPBUILDSYS='linux-amd64 windows-amd64' ./release.sh v0.31.3-beta

This will produce the same artifacts in a loop-<tag-of-release> directory as the make docker-release command. The latter simply runs the release.sh script inside a Docker container.