go clean -modcache


# Also try it with a 'go install' that succeeds.
# (But skip in short mode, because linking a binary is expensive.)
[!short] go install -modcacherw example.com/printversion@v0.1.0
[!short] cp $WORK/extraneous.txt $GOPATH/pkg/mod/example.com/printversion@v0.1.0/extraneous_file.go
[!short] go clean -modcache


# The flag should also be applied if given in GOFLAGS

# This test verifies that GOMODCACHE does not affect whether checksums are embedded
# with vendored files.
# See issue #46400
[short] skip 'builds and links a binary twice'
go mod tidy
go mod vendor

go build -mod=vendor
go version -m example$GOEXE
cp stdout version-m.txt

env GOMODCACHE=$WORK${/}modcache
go build -mod=vendor
go version -m example$GOEXE
cmp stdout version-m.txt

-- go.mod --
module example
go 1.22

					base.Error(err)
				}
			}
		}
	}

	if cleanModcache {
		if cfg.GOMODCACHE == "" {
			base.Fatalf("go: cannot clean -modcache without a module cache")
		}
		if cfg.BuildN || cfg.BuildX {
			sh.ShowCmd("", "rm -rf %s", cfg.GOMODCACHE)
		}
		if !cfg.BuildN {
			if err := modfetch.RemoveAll(cfg.GOMODCACHE); err != nil {
				base.Error(err)
			}
		}
	}

	if cleanFuzzcache {

# downloaded dependencies are read-only
exists -readonly $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
exists -readonly $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/buggy

# go clean -modcache can delete read-only dependencies
go clean -modcache
! exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2

# list {{.Dir}} shows replaced directories
cp go.mod2 go.mod
go list -mod=mod -f {{.Dir}} rsc.io/quote

cp stdout all.json

# clean the module cache, make sure that makes go mod download re-run git fetch, clean again
go clean -modcache
go mod download -x -json vcs-test.golang.org/git/hello.git@latest
stderr 'git( .*)* fetch'
go clean -modcache

# reuse go mod download vcstest/hello result
go mod download -reuse=hello.json -x -json vcs-test.golang.org/git/hello.git@latest
! stderr 'git( .*)* fetch'

	// go tool may complain.
	os.Setenv("GOPATH", pathf("%s/pkg/obj/gopath", goroot))

	// Set GOPROXY=off to avoid downloading modules to the modcache in
	// the GOPATH set above to be inside GOROOT. The modcache is read
	// only so if we downloaded to the modcache, we'd create readonly
	// files in GOROOT, which is undesirable. See #67463)
	os.Setenv("GOPROXY", "off")

	// opened files in the temporary directory.
	//
	// Go 1.14.2 and higher respect .partial files. Older versions may use
	// partially extracted directories. 'go mod verify' can detect this,
	// and 'go clean -modcache' can fix it.
	if err := os.MkdirAll(parentDir, 0777); err != nil {
		return "", err
	}
	if err := os.WriteFile(partialPath, nil, 0666); err != nil {
		return "", err
	}

 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
 * model builder.
 *
 */
public interface ModelCache {

    <T> T computeIfAbsent(String groupId, String artifactId, String version, String tag, Supplier<T> data);

    <T> T computeIfAbsent(Source path, String tag, Supplier<T> data);

 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
 * model builder.
 *
 */
public interface ModelCache {

    <T> T computeIfAbsent(String groupId, String artifactId, String version, String tag, Supplier<T> data);

    <T> T computeIfAbsent(Source path, String tag, Supplier<T> data);

		}
		modcacheOk := false
		if gomodcache := string(bytes.TrimSpace(out)); gomodcache != "" {
			if _, err := os.Stat(gomodcache); err == nil {
				modcacheOk = true
			}
		}
		if !modcacheOk {
			modcacheEnv = []string{
				"GOMODCACHE=" + t.TempDir(),
				"GOFLAGS=" + os.Getenv("GOFLAGS") + " -modcacherw", // Allow t.TempDir() to clean up subdirectories.
			}
		}
	}