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| author | Jay Conrod <jayconrod@google.com> | 2021-07-27 10:22:35 -0700 |
|---|---|---|
| committer | Jay Conrod <jayconrod@google.com> | 2021-07-27 22:01:54 +0000 |
| commit | 7cd10c1149e51a9d2f0868babaf66b8091b9c0b9 (patch) | |
| tree | f190df0ead3f829b86d70b586c89516b9683f9b6 /src/cmd/go/testdata/script/mod_update_sum_readonly.txt | |
| parent | c8cf0f74e4a8f078ab5570e76c37621a0daf0309 (diff) | |
| download | go-7cd10c1149e51a9d2f0868babaf66b8091b9c0b9.tar.gz go-7cd10c1149e51a9d2f0868babaf66b8091b9c0b9.zip | |
cmd/go: use .mod instead of .zip to determine if version has go.mod file
When checking for updates, the go command checks whether the highest
compatible version has a go.mod file in order to determine whether
+incompatible versions may be considered "latest". Previously, to
perform this check, the go command would download the content of the
module (the .zip file) to see whether a go.mod file was present at the
root. This is slower than necessary, and it caused 'go list -m -u' to
try to save the sum for the .zip file in go.sum in some cases.
With this change, the go command only downloads the .mod file and
checks whether it appears to be a fake file generated for a version
that didn't have a go.mod file. This is faster and requires less
verification. Fake files only have a "module" directive. It's possible
to commit a file that passes this test, but it would be difficult to
do accidentally: Go 1.12 and later at least add a "go" directive. A
false positive here would cause version queries to have slightly
different results but would not affect builds.
Fixes #47377
Change-Id: Ie5ffd0b45e39bd0921328a60af99a9f6e5ab6346
Reviewed-on: https://go-review.googlesource.com/c/go/+/337850
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Diffstat (limited to 'src/cmd/go/testdata/script/mod_update_sum_readonly.txt')
| -rw-r--r-- | src/cmd/go/testdata/script/mod_update_sum_readonly.txt | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/cmd/go/testdata/script/mod_update_sum_readonly.txt b/src/cmd/go/testdata/script/mod_update_sum_readonly.txt new file mode 100644 index 0000000000..41f12e4084 --- /dev/null +++ b/src/cmd/go/testdata/script/mod_update_sum_readonly.txt @@ -0,0 +1,34 @@ +# When finding the latest version of a module, we should not download version +# contents. Previously, we downloaded .zip files to determine whether a real +# .mod file was present in order to decide whether +incompatible versions +# could be "latest". +# +# Verifies #47377. + +# rsc.io/breaker has two versions, neither of which has a .mod file. +go list -m -versions rsc.io/breaker +stdout '^rsc.io/breaker v1.0.0 v2.0.0\+incompatible$' +go mod download rsc.io/breaker@v1.0.0 +! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.mod +go mod download rsc.io/breaker@v2.0.0+incompatible +! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v2.0.0+incompatible.mod + +# Delete downloaded .zip files. +go clean -modcache + +# Check for updates. +go list -m -u rsc.io/breaker +stdout '^rsc.io/breaker v1.0.0 \[v2.0.0\+incompatible\]$' + +# We should not have downloaded zips. +! exists $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.zip +! exists $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v2.0.0+incompatible.zip + +-- go.mod -- +module m + +go 1.16 + +require rsc.io/breaker v1.0.0 +-- go.sum -- +rsc.io/breaker v1.0.0/go.mod h1:s5yxDXvD88U1/ESC23I2FK3Lkv4YIKaB1ij/Hbm805g= |