Previously, the build ended up embedding an empty string, which made
the shell wrapper rebuild gocross on every invocation. This is still
reasonably fast, but fixing the bypass shaves 80% off gocross's overhead
when no rebuild is needed.
Signed-off-by: David Anderson <danderson@tailscale.com>
A bunch of us invoke tool/go from outside the repo that hosts gocross,
as a way of accessing our version-controlled toolchain. This removes
assumptions from gocross that it's being invoked within the repository
that contains its source code and toolchain configuration.
Fixestailscale/corp#9627
Signed-off-by: David Anderson <danderson@tailscale.com>
This used to make sense, but after a refactor somewhere along the line
this results in trying to download from a malformed URL and generally
confusing failures.
Signed-off-by: David Anderson <danderson@tailscale.com>
Xcode changed how/what data it exports to build steps at some point
recently, so our old way of figuring out the minimum support version
for clang stopped working.
Updates tailscale/corp#4095
Signed-off-by: David Anderson <danderson@tailscale.com>
Sometimes, our cached toolchain ends up being an older version of
Go, older than our go.mod allows. In that scenario, gocross-wrapper.sh
would find a usable toolchain, but then fail to compile gocross.
This change makes the wrapper script check that the cached toolchain's
minor version is good enough to build tailscale.com, and re-bootstraps
in shell if not.
Signed-off-by: David Anderson <danderson@tailscale.com>
This makes gocross and its bootstrap script understand an absolute
path in go.toolchain.rev to mean "use the given toolchain directly".
Signed-off-by: David Anderson <danderson@tailscale.com>
We need to build gocross from multiple repos, but Go's innate
git hash embedding only works when you build gocross from this repo,
not when you build it from elsewhere via 'go build
tailscale.com/tool/gocross'. Instead, explicitly embed the version
found with 'git rev-parse HEAD', which will work from any git repo.
Signed-off-by: David Anderson <danderson@tailscale.com>
This avoids accidentally overwriting variables from the input
environment, which might non-deterministically change the behavior
of gocross.
Signed-off-by: David Anderson <danderson@tailscale.com>
Turns out directing the printed script into the bootstrap location leads
to irritating "text file busy" problems and then having to muck about with
tempfiles and chmod and all that. Instead, have gocross write everything
with the right values.
Signed-off-by: David Anderson <danderson@tailscale.com>
So that when importing and using gocross from other repos, there's
an easy way to get at the right wrapper script that's in sync with
the gocross binary.
Signed-off-by: David Anderson <danderson@tailscale.com>
The use of GOOS to mean "the compiler's host architecture" ends up
overriding whatever GOOS the user passed in, resulting in befuddling
errors like "unsupported GOOS/GOARCH pair linux/wasm" when the caller
requests js/wasm.
Signed-off-by: David Anderson <danderson@tailscale.com>
Also removes the toolchain builds from flake.nix. For now the flake
build uses upstream Go 1.20, a followup change will switch it back to
our custom toolchain.
Updates tailscale/corp#9005
Signed-off-by: David Anderson <danderson@tailscale.com>
Saves about 1.4MB from the generated wasm file. The Brotli size is
basically unchanged (it's actually slightly larger, by 40K), suggesting
that most of the size delta is due to not inlining and other changes
that were easily compressible.
However, it still seems worthwhile to have a smaller final binary, to
reduce parse time and increase likelihood that we fit in the browser's
disk cache. Actual performance appears to be unchanged.
Updates #5142
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
Technically not the same as the wasm cross-compilation, but it's
closely connected to it.
Also includes some fixes to tool/yasm to make it actually work on
non-ARM platforms.
Fixes#5134
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
Somewhere my local configuration or program versions are producing
marker files earlier in the process that lack a line terminator. This
doesn't need to cause an exit via set -e, we can just continue the
process. $extracted matches $REV anyway, so the process works.
Signed-off-by: James Tucker <james@tailscale.com>
Adds a tool/yarn helper script that uses specific versions of yarn and
node, downloading them if necessary.
Modeled after tool/go (and the yarn and node Redo scripts from the
corp repo).
Also allows the path to yarn to be overidden (in case the user does not
want to use this script) and always pipes yarn output (to make debugging
and viewing of process easier).
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
