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Russ Cox bf084ef758 imports: add support for vendor directories 
Editor modes that invoke the goimports command on temporary copies
of actual source files will need to invoke goimports -srcdir now to say
where the real source directory is. Otherwise goimports will not consider
vendored or internal packages when looking for new imports.

In lieu of a test for cmd/goimports (because it has no tests),
a command transcript:

	$ cd /tmp
	$ cat x.go
	package p
	var _ = hpack.HuffmanDecode
	$

	$ GOPATH= goimports < x.go
	package p

	var _ = hpack.HuffmanDecode
	$ GOPATH= goimports x.go
	package p

	var _ = hpack.HuffmanDecode
	$

But with the new flag:

	$ GOPATH= goimports -srcdir $GOROOT/src/math < x.go
	package p

	import "golang.org/x/net/http2/hpack"

	var _ = hpack.HuffmanDecode
	$ GOPATH= goimports -srcdir $GOROOT/src/math x.go
	package p

	import "golang.org/x/net/http2/hpack"

	var _ = hpack.HuffmanDecode
	$

The tests in this CL and the above transcript assume that
$GOROOT/src/vendor/golang.org/x/net/http2/hpack exists.
It did in 40a26c9, but it does not today.
It will again soon (once Go 1.7 opens).

For golang/go#12278 (original request).

Change-Id: I27b136041f54edcde4bf474215b48ebb0417f34d
Reviewed-on: https://go-review.googlesource.com/17728
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
 		2016-02-18 16:47:46 +00:00
..
doc.go all: update links from code.google.com to new homes 2014-12-12 03:10:55 +00:00
goimports.go imports: add support for vendor directories 2016-02-18 16:47:46 +00:00