1# Regression test for https://go.dev/issue/57754: 'go list' failed if ../src
2# relative to the location of the go executable was a symlink to the real src
3# directory. (cmd/go expects that ../src is GOROOT/src, but it appears that the
4# Debian build of the Go toolchain is attempting to split GOROOT into binary and
5# source artifacts in different parent directories.)
6
7[short] skip 'copies the cmd/go binary'
8[!symlink] skip 'tests symlink-specific behavior'
9[GOOS:darwin] skip 'Lstat on darwin does not conform to POSIX pathname resolution; see #59586'
10[GOOS:ios] skip 'Lstat on ios does not conform to POSIX pathname resolution; see #59586'
11
12# Ensure that the relative path to $WORK/lib/goroot/src from $PWD is a different
13# number of ".." hops than the relative path to it from $WORK/share/goroot/src.
14
15cd $WORK
16
17# Construct a fake GOROOT in $WORK/lib/goroot whose src directory is a symlink
18# to a subdirectory of $WORK/share. This mimics the directory structure reported
19# in https://go.dev/issue/57754.
20#
21# Symlink everything else to the original $GOROOT to avoid needless copying work.
22
23mkdir $WORK/lib/goroot
24mkdir $WORK/share/goroot
25symlink $WORK/share/goroot/src -> $GOROOT${/}src
26symlink $WORK/lib/goroot/src -> ../../share/goroot/src
27symlink $WORK/lib/goroot/pkg -> $GOROOT${/}pkg
28
29# Verify that our symlink shenanigans don't prevent cmd/go from finding its
30# GOROOT using os.Executable.
31#
32# To do so, we copy the actual cmd/go executable — which is implemented as the
33# cmd/go test binary instead of the original $GOROOT/bin/go, which may be
34# arbitrarily stale — into the bin subdirectory of the fake GOROOT, causing
35# os.Executable to report a path in that directory.
36
37mkdir $WORK/lib/goroot/bin
38cp $TESTGO_EXE $WORK/lib/goroot/bin/go$GOEXE
39
40env GOROOT='' # Clear to force cmd/go to find GOROOT itself.
41exec $WORK/lib/goroot/bin/go env GOROOT
42stdout $WORK${/}lib${/}goroot
43
44# Now verify that 'go list' can find standard-library packages in the symlinked
45# source tree, with paths matching the one reported by 'go env GOROOT'.
46
47exec $WORK/lib/goroot/bin/go list -f '{{.ImportPath}}: {{.Dir}}' encoding/binary
48stdout '^encoding/binary: '$WORK${/}lib${/}goroot${/}src${/}encoding${/}binary'$'
49
50exec $WORK/lib/goroot/bin/go list -f '{{.ImportPath}}: {{.Dir}}' std
51stdout '^encoding/binary: '$WORK${/}lib${/}goroot${/}src${/}encoding${/}binary'$'
52
53# Most path lookups in GOROOT are not sensitive to symlinks. However, patterns
54# involving '...' wildcards must use Walk to check the GOROOT tree, which makes
55# them more sensitive to symlinks (because Walk doesn't follow them).
56#
57# So we check such a pattern to confirm that it works and reports a path relative
58# to $GOROOT/src (and not the symlink target).
59
60exec $WORK/lib/goroot/bin/go list -f '{{.ImportPath}}: {{.Dir}}' .../binary
61stdout '^encoding/binary: '$WORK${/}lib${/}goroot${/}src${/}encoding${/}binary'$'
62! stderr .
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