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cmd/go: cannot find module for gonum.org/v1/gonum/stat/distmv #26632

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pwaller opened this issue Jul 26, 2018 · 3 comments
Closed

cmd/go: cannot find module for gonum.org/v1/gonum/stat/distmv #26632

pwaller opened this issue Jul 26, 2018 · 3 comments
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FrozenDueToAge modules NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.

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@pwaller
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pwaller commented Jul 26, 2018

I'm running the master branch as of this morning: devel +e5b1340 Wed Jul 25 23:53:54 2018 +0000 linux/amd64.

The following (importing gonum.org/v1/gonum/stat/distmv and syncing) does not work as I expect it to:

$ mkdir tmp && cd tmp
$ go mod -init -module foo.to/tmp
go: creating new go.mod: module foo.to/tmp

$ echo $'package tmp\nimport "gonum.org/v1/gonum/stat/distmv"' > tmp.go

$ go mod -sync
go: finding gonum.org/v1/gonum/stat/distmv latest
go: finding gonum.org/v1/gonum/stat latest
go: finding gonum.org/v1/gonum latest
go: import "foo.to/tmp" ->
	import "gonum.org/v1/gonum/stat/distmv": cannot find module providing package gonum.org/v1/gonum/stat/distmv

Apologies that I don't have time to dig deeper into this at the moment. One possible culprit seems to be build tags, as mentioned in the gonum vgo meta issue.

Other discussion: golang-dev thread.
@pwaller pwaller mentioned this issue Jul 26, 2018
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@agnivade agnivade added modules NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Jul 27, 2018
@rogpeppe
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FWIW I can't reproduce this (go version devel +b39fb9ec85 Fri Jul 27 16:29:52 2018 +0000 linux/amd64
).

What git version are you using?

@pwaller
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pwaller commented Jul 29, 2018

What git version are you using?

git version 2.7.4

Here's the output of go mod -sync:

$ go mod -sync -x
# /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030 for git2 https://github.com/gonum/gonum
cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git ls-remote -q https://github.com/gonum/gonum
0.392s # cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git ls-remote -q https://github.com/gonum/gonum
go: finding gonum.org/v1/gonum/stat/distmv latest
cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git -c log.showsignature=false log -n1 --format=format:%H %ct %D cebdade430ccb61c1feba4878085f6cf8cb3320e
0.002s # cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git -c log.showsignature=false log -n1 --format=format:%H %ct %D cebdade430ccb61c1feba4878085f6cf8cb3320e
cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git tag -l
0.002s # cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git tag -l
cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git fetch -f --depth=1 https://github.com/gonum/gonum cebdade430ccb61c1feba4878085f6cf8cb3320e:refs/dummy
0.345s # cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git fetch -f --depth=1 https://github.com/gonum/gonum cebdade430ccb61c1feba4878085f6cf8cb3320e:refs/dummy
go: finding gonum.org/v1/gonum/stat latest
go: finding gonum.org/v1/gonum latest
go: import "foo.to/tmp" ->
	import "gonum.org/v1/gonum/stat/distmv": cannot find module providing package gonum.org/v1/gonum/stat/distmv

If I run cd /home/pwaller/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030; git fetch -f --depth=1 https://github.com/gonum/gonum cebdade430ccb61c1feba4878085f6cf8cb3320e:refs/dummy, it returns exit status 1.

git cat-file -p cebdade430ccb61c1feba4878085f6cf8cb3320e works just fine in a fresh clone, but not from the /mod/cache/vcs/... directory, (I also tried setting GIT_DIR to point there, but I get back:

~/.local/src/mod/cache/vcs/4ad966aa57dadda5e35c195a5db2854067afd6f28b21af1b907991523a199030$ GIT_DIR=. git cat-file -p cebdade430ccb61c1feba4878085f6cf8cb3320e
fatal: Not a valid object name cebdade430ccb61c1feba4878085f6cf8cb3320e

The git fetch doesn't print any errors, so that's weird.

In case it's relevant, I also have this set in my $HOME/.gitconfig:

[url "ssh://git@github.com/"]
         insteadOf = https://github.com/
         insteadOf = git://github.com/

@pwaller
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pwaller commented Jul 31, 2018

I can't currently reproduce this unfortunately, and I don't know what caused it to be fixed. Perhaps a bad cache from a previous dev version of go/vgo.

Closing, will reopen if I hit it again.

@pwaller pwaller closed this as completed Jul 31, 2018
@thepudds thepudds mentioned this issue Apr 28, 2019
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