Since you put yourself as owner, I'm changing this to assigned.

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff

commit d52b666028d0e37b9b33eb6bd73d1938a3cd3fff
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 03:47:19 2017

Sever isolate package's dependency on client/internal.

This is in preparation for moving the isolate package to its own top-level
directory, where it will not have access to client/internal.

BUG= 732677 

Review-Url: https://codereview.chromium.org/2937663002

[modify] https://crrev.com/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff/client/isolate/format.go
[modify] https://crrev.com/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff/client/isolate/format_test.go
[modify] https://crrev.com/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff/client/isolate/isolate.go
[modify] https://crrev.com/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff/client/isolate/isolate_test.go
[modify] https://crrev.com/d52b666028d0e37b9b33eb6bd73d1938a3cd3fff/client/isolate/utils.go

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/2bf17973b3ef98d40feda9e113bcb8c6607b479b

commit 2bf17973b3ef98d40feda9e113bcb8c6607b479b
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 03:55:49 2017

Break isolate cmd dependency on Canceler.

BUG= 732677 

Review-Url: https://codereview.chromium.org/2936713003

[modify] https://crrev.com/2bf17973b3ef98d40feda9e113bcb8c6607b479b/client/cmd/isolate/archive.go
[modify] https://crrev.com/2bf17973b3ef98d40feda9e113bcb8c6607b479b/client/cmd/isolate/batch_archive.go

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/b903ee51e442ff3fdbe533b7e9cfec96139a8ad4

commit b903ee51e442ff3fdbe533b7e9cfec96139a8ad4
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 04:11:09 2017

Refactor genjson processing code.

BUG= 732677 

Review-Url: https://codereview.chromium.org/2937583003

[modify] https://crrev.com/b903ee51e442ff3fdbe533b7e9cfec96139a8ad4/client/cmd/isolate/batch_archive.go

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/a4a9617ec3dc88d18d92653b0270f584fcbcc98e

commit a4a9617ec3dc88d18d92653b0270f584fcbcc98e
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 04:20:00 2017

Remove ReadJSONFile

Also some refactoring in batcharchive.

BUG= 732677 

Review-Url: https://codereview.chromium.org/2933273002

[modify] https://crrev.com/a4a9617ec3dc88d18d92653b0270f584fcbcc98e/client/cmd/isolate/batch_archive.go
[modify] https://crrev.com/a4a9617ec3dc88d18d92653b0270f584fcbcc98e/client/internal/common/json.go

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/3b2cf368c09e435c41d69235e93ff7eb5980bd5b

commit 3b2cf368c09e435c41d69235e93ff7eb5980bd5b
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 05:30:27 2017

Move WriteJSONFile to its sole caller's package, with some refactoring.

BUG= 732677 

Review-Url: https://codereview.chromium.org/2938823003

[modify] https://crrev.com/3b2cf368c09e435c41d69235e93ff7eb5980bd5b/client/cmd/isolate/batch_archive.go
[delete] https://crrev.com/a4a9617ec3dc88d18d92653b0270f584fcbcc98e/client/internal/common/json.go

The following revision refers to this bug:
  https://chromium.googlesource.com/external/github.com/luci/luci-go.git/+/35426aab5e558df793b116a5f0c516633a32376b

commit 35426aab5e558df793b116a5f0c516633a32376b
Author: mcgreevy <mcgreevy@chromium.org>
Date: Thu Jun 15 06:23:11 2017

Remove batcharchive dependency on common.IsDirectory

BUG= 732677 

Review-Url: https://codereview.chromium.org/2941963002

[modify] https://crrev.com/35426aab5e558df793b116a5f0c516633a32376b/client/cmd/isolate/batch_archive.go
[modify] https://crrev.com/35426aab5e558df793b116a5f0c516633a32376b/client/internal/common/utils.go

I have no plans to work on this any further, and the impetus for doing it has passed. Closing WontFix.