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x/tools/cmd/goimports: removes necessary imports with certain characters #29044

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mattmoor opened this issue Nov 30, 2018 · 7 comments
Closed

x/tools/cmd/goimports: removes necessary imports with certain characters #29044

mattmoor opened this issue Nov 30, 2018 · 7 comments
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FrozenDueToAge WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided.
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@mattmoor
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Using goimports at release-branch.go1.10, I see it dropping necessary imports when they have - and are not aliased,

You can see it in this removal with a hyphen:
https://github.com/knative/eventing/pull/653/files#diff-abdff22f055e921908e64cdb584fa75cL25

... and this removal with a dot:
https://github.com/knative/docs/pull/611/files#diff-06a9a211281c9004b5638fc5207899d8L32

I can't use HEAD or 1.11 because of: #29041
@gopherbot gopherbot added this to the Unreleased milestone Nov 30, 2018
@mattmoor
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Another with a dot: https://github.com/google/go-containerregistry/pull/313/files#diff-84d0b2b66c1e04aafeb35b922e2a399cL23

@agnivade
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agnivade commented Dec 2, 2018 •
edited

Hi @mattmoor - Could you provide us with a self-contained code sample which reproduces this behavior ? I tried this myself but wasn't able to reproduce it.

I can't use HEAD or 1.11 because of: #29041

I believe that is a different issue than this, right ? Is there a reason you cannot use the tip goimports to test this bug ?

/cc @bradfitz

EDIT: I also have github.com/aws/aws-sdk-go throughout several codebases, and goimports work fine there. Trying to understand if there is a regression somewhere or this was fixed.

@agnivade agnivade added the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Dec 2, 2018
@mattmoor
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mattmoor commented Dec 2, 2018

Weird, so I cannot reproduce this when github.com/knative/docs is on ${GOPATH}, but I can reproduce this if the repo is simply cloned into /workspace.

@mattmoor
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mattmoor commented Dec 2, 2018

Steps:

  1. go get golang.org/x/tools/cmd/goimports
  2. Checkout release-branch.go1.10 (optional, I confirmed this reproduces @ HEAD)
  3. git clone https://github.com/knative/docs /tmp/docs && cd /tmp/docs
  4. go run golang.org/x/tools/cmd/goimports -w eventing/samples/iot-core/generator/main.go
  5. git diff eventing/samples/iot-core/generator/main.go

@agnivade
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agnivade commented Dec 2, 2018

I just tried with HEAD (d0ca393) and I am still unable to reproduce it.

$git clone https://github.com/knative/docs /tmp/docs && cd /tmp/docs
Cloning into '/tmp/docs'...
remote: Enumerating objects: 7, done.
remote: Counting objects: 100% (7/7), done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 4597 (delta 0), reused 0 (delta 0), pack-reused 4590
Receiving objects: 100% (4597/4597), 13.36 MiB | 2.34 MiB/s, done.
Resolving deltas: 100% (2401/2401), done.
12:28:36-agniva-/tmp/docs$
12:31:41-agniva-/tmp/docs$go run golang.org/x/tools/cmd/goimports -w eventing/samples/iot-core/generator/main.go
12:31:46-agniva-/tmp/docs$git st
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
12:31:56-agniva-/tmp/docs$git diff eventing/samples/iot-core/generator/main.go
12:32:53-agniva-/tmp/docs$

Could you please attach the output of go env ?

@agnivade agnivade added WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. and removed WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. labels Dec 3, 2018
@heschi
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heschi commented Dec 5, 2018

Weird, so I cannot reproduce this when github.com/knative/docs is on ${GOPATH}, but I can reproduce this if the repo is simply cloned into /workspace.

Yeah. In general, if a package's name doesn't match its import path, goimports is going to have to load it. In GOPATH mode, that means having it on GOPATH. tip goimports now adds a name to the import in these situations, which prevents the problem.

$ GOPATH=/tmp/foo go get -d github.com/knative/docs
package github.com/knative/docs: no Go files in /tmp/foo/src/github.com/knative/docs
$ cd /tmp/foo/src/github.com/knative/docs 
$ goimports -w eventing/samples/iot-core/generator/main.go 
$ git diff
diff --git a/eventing/samples/iot-core/generator/main.go b/eventing/samples/iot-core/generator/main.go
index 813e2b0..018e9b0 100644
--- a/eventing/samples/iot-core/generator/main.go
+++ b/eventing/samples/iot-core/generator/main.go
@@ -27,9 +27,7 @@ import (
        "math/rand"
        "time"
 
-       "github.com/dgrijalva/jwt-go"
        MQTT "github.com/eclipse/paho.mqtt.golang"
-       "github.com/satori/go.uuid"
 )
 
 const (
$ git reset --hard
HEAD is now at 098b76e move eventing to 0.2.1 release (#629)
$ GOPATH=/tmp/foo goimports -w eventing/samples/iot-core/generator/main.go
$ git diff                                                                                 
diff --git a/eventing/samples/iot-core/generator/main.go b/eventing/samples/iot-core/generator/main.go
index 813e2b0..052ad2d 100644
--- a/eventing/samples/iot-core/generator/main.go
+++ b/eventing/samples/iot-core/generator/main.go
@@ -27,9 +27,9 @@ import (
        "math/rand"
        "time"
 
-       "github.com/dgrijalva/jwt-go"
+       jwt "github.com/dgrijalva/jwt-go"
        MQTT "github.com/eclipse/paho.mqtt.golang"
-       "github.com/satori/go.uuid"
+       uuid "github.com/satori/go.uuid"
 )
 
 const (
$ git commit -a -m foo  
[master f0aefbd] foo
 1 file changed, 2 insertions(+), 2 deletions(-)
$ goimports -w eventing/samples/iot-core/generator/main.go                
$ git diff
$

@agnivade: you probably had a copy of the package in your GOPATH already when you ran goimports.

I don't think there's anything we can do to improve the situation further, so I'm closing this. Comment if you disagree.

@heschi heschi closed this as completed Dec 5, 2018
@mattmoor
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mattmoor commented Dec 5, 2018

@heschik I worked around this by symlinking the repo onto GOPATH. I will try tip when I get a chance. thanks.

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@agnivade @mattmoor @gopherbot @heschi