In this commit, we add a call to "go clean -cache" after each platform
build in the release script to prevent the Go build cache from accumulating
unbounded disk space during the sequential 15-platform build process.
When building for multiple platforms in sequence with "go build -v", Go
creates intermediate build artifacts and caches compiled packages for each
target platform. While this caching improves build performance within a
single platform build, it causes the cache to grow substantially when
building for many platforms sequentially. With 15 different platform/
architecture combinations, each with their own cached artifacts, this
accumulation was contributing to the disk space exhaustion.
By clearing the build cache after each platform completes, we prevent this
unbounded growth while still allowing each individual platform build to
benefit from caching during its own compilation. The module cache is
preserved (we only clear the build cache), so dependencies don't need to be
re-downloaded between platforms.
On MacOS, the default BSD gzip produces a different output than the GNU gzip
on Linux. To ensure reproducible builds, we need to use GNU gzip.
This is similar to what we do to enforce GNU tar.
This commit updates `scripts/release.sh` to include a check for the
correct Go version before executing the release build. This ensures that
the release binaries are built with the specified Go version,
maintaining consistency and integrity for developer signatures.
We add a new make goal called release-install that creates the same
reproducible binaries as the release script would create, but only for
the current OS/architecture. It then installs those binaries to the
system's GOBIN directory.
To allow easy verification of individual binaries (instead of just the
packag tarballs/zips), we also add the hashes of lnd and lncli binaries
to the manifest. We do the same in the docker build.
A number of tricks need to be applied to the tar and zip commands
respectively to make sure they always produce deterministic archives.
This includes setting the file timestamps to a fixed date and setting
specific ownership attributes (tar) or no attributes at all (zip).
Because this script is now run from the main Makefile, it is more
suitable to be located in the main scripts folder where the other
build related scripts reside.
