install_modcacherw_issue64282.txt

Documentation: cmd/go/testdata/script

     1# Regression test for https://go.dev/issue/64282.
     2#
     3# 'go install' and 'go run' with pkg@version arguments should make
     4# a best effort to parse flags relevant to downloading modules
     5# (currently only -modcacherw) before actually downloading the module
     6# to identify which toolchain version to use.
     7#
     8# However, the best-effort flag parsing should not interfere with
     9# actual flag parsing if we don't switch toolchains. In particular,
    10# unrecognized flags should still be diagnosed after the module for
    11# the requested package has been downloaded and checked for toolchain
    12# upgrades.
    13
    14
    15! go install -cake=delicious -modcacherw example.com/printversion@v0.1.0
    16stderr '^flag provided but not defined: -cake$'
    17	# Because the -modcacherw flag was set, we should be able to modify the contents
    18	# of a directory within the module cache.
    19cp $WORK/extraneous.txt $GOPATH/pkg/mod/example.com/printversion@v0.1.0/extraneous_file.go
    20go clean -modcache
    21
    22
    23! go install -unknownflag -tags -modcacherw example.com/printversion@v0.1.0
    24stderr '^flag provided but not defined: -unknownflag$'
    25cp $WORK/extraneous.txt $GOPATH/pkg/mod/example.com/printversion@v0.1.0/extraneous_file.go
    26go clean -modcache
    27
    28
    29# Also try it with a 'go install' that succeeds.
    30# (But skip in short mode, because linking a binary is expensive.)
    31[!short] go install -modcacherw example.com/printversion@v0.1.0
    32[!short] cp $WORK/extraneous.txt $GOPATH/pkg/mod/example.com/printversion@v0.1.0/extraneous_file.go
    33[!short] go clean -modcache
    34
    35
    36# The flag should also be applied if given in GOFLAGS
    37# instead of on the command line.
    38env GOFLAGS=-modcacherw
    39! go install -cake=delicious example.com/printversion@v0.1.0
    40stderr '^flag provided but not defined: -cake$'
    41cp $WORK/extraneous.txt $GOPATH/pkg/mod/example.com/printversion@v0.1.0/extraneous_file.go
    42
    43
    44-- $WORK/extraneous.txt --
    45This is not a Go source file.
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