We aim to make the tsgo directories be read-only mounts on builders.
But gocross was previously writing within the ~/.cache/tsgo/$HASH/
directories to make the synthetic GOROOT directories.
This moves them to ~/.cache/tsgoroot/$HASH/ instead.
Updates tailscale/corp#28679
Updates tailscale/corp#26717
Change-Id: I0d17730bbdce3d6374e79d49486826575d4690af
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
So it doesn't delete and re-pull when switching between branches.
Updates tailscale/corp#17686
Change-Id: Iffb989781db42fcd673c5f03dbd0ce95972ede0f
Signed-off-by: Brad Fitzpatrick <bradfitz@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>
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>
