Avoid Toolchain download before cache download #456
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`go version` is run before downloading the cache, but if this is run with a version of `go` that triggers a Toolchain download[1], e.g. if the installed Go is 1.20.0 but `go.mod` has a toolchain directive `go1.20.1` then a toolchain is downloaded to e.g. `$GOMODCACHE/golang.org/[email protected]`, if this file already exists in the cache (e.g. this is the second run of this action we not cache invalidation) then the cache download will try and overwrite these files resulting in noisy errors like: /usr/bin/tar: ../../../go/pkg/mod/golang.org/[email protected]/lib/time/mkzip.go: Cannot open: File exists Instead, force `go` to use the local toolchain (i.e. the one the one that shipped with the go command being run) via setting the `GOTOOLCHAIN` environment variable[1]: > When GOTOOLCHAIN is set to local, the go command always runs the bundled Go toolchain. This addresses actions#424 [1] https://go.dev/doc/toolchain#select
matthewhughes-uw
commented
Feb 8, 2024
src/main.ts
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| // run `go version` with the bundled Go toolchain to avoid potentially | ||
| // downloading one into the cache | ||
| const goVersion = (cp.execSync(`${goPath} version`) || '', | ||
| {env: {...process.env, GOTOOLCHAIN: 'local'}}).toString(); |
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Happy to hear any suggestions for testing this (i.e. test that a toolchain isn't downloaded)
EDIT: testing via https://github.com/matthewhughes-uw/setup-go-test, looks like I missed something
5 tasks
Also handle lookups on cache restore
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The code is a bit messy right now, but I just want to get a PoC working, which it looks like it is:
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#460 is a better solution to this |
matthewhughes-uw
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Description:
go versionis run before downloading the cache, but if this is run with a version ofgothat triggers a Toolchain download[1], e.g. if the installed Go is 1.20.0 butgo.modhas a toolchain directivego1.20.1then a toolchain is downloaded to e.g.$GOMODCACHE/golang.org/[email protected], if this file already exists in the cache (e.g. this is the second run of this action we not cache invalidation) then the cache download will try and overwrite these files resulting in noisy errors like:Instead, force
goto use the local toolchain (i.e. the one the one that shipped with the go command being run) via setting theGOTOOLCHAINenvironment variable[1]:[1] https://go.dev/doc/toolchain#select
Related issue:
This addresses #424
Check list: