cmd/go: no rebuild with deleted files

[mb0]

$ go version
go version devel +f2e954f463e0 Thu Aug 29 10:16:09 2013 +0200 linux/amd64

steps that will reproduce the problem:
1. $ cd $GOPATH/src
   $ unzip path/to/attached/delfile.zip
2. $ go install delfile
   $ ../bin/delfile
   prints "still there"
3. $ rm delfile/deleted.go
   $ go install delfile
   $ ../bin/delfile
   prints "still there"

the expected output of the second go install is:
# delfile
./main.go:4: undefined: deleted

same behavior is observed for non command/main packages.

Attachments:

1. delfile.zip (598 bytes)

[robpike]

Comment 1:

A fix will require a different architecture for the go command involving file change
notification from the operating system.
See also issue #3832.

Labels changed: added priority-someday, removed priority-triage.

Status changed to Accepted.

[mb0]

Comment 2:

a quick check for the files that were used to build the command or package can be
achieved without a notification system. although not a pretty solution:
$ cd /opt/go # your $GOROOT here
$ strings pkg/linux_amd64/fmt.a | grep -e "<.*\.go"
<doc.go
<format.go
<print.go
<scan.go
$ strings bin/gofmt | grep -e "cmd/gofmt/.*\.go"
/opt/go/src/cmd/gofmt/simplify.go
/opt/go/src/cmd/gofmt/rewrite.go
/opt/go/src/cmd/gofmt/gofmt.go
/opt/go/src/cmd/gofmt/doc.go
just a suggestion.

[rsc]

Comment 3:

Status changed to Duplicate.

Merged into issue #3895.