Convert zero length file

[kna]

git lfs command does not convert zero length file to a pointer file
ref. https://github.com/github/git-lfs/blob/cd68f26c103b9ad474bd569c98a5e490e696b544/test/test-zero-len-file.sh#L37

But, git-lfs-migrate(v0.2.2) converts it.

$ mkdir git-lfs-migrate-test
$ cd git-lfs-migrate-test/
$ git init
$ touch empty.dat
$ git add empty.dat
$ git commit -m 'add files'
$ cd ..

$ git clone --mirror git-lfs-migrate-test git-lfs-migrate-test.git
$ java -jar git-lfs-migrate.jar \
     -s git-lfs-migrate-test.git \
     -d git-lfs-migrate-test-converted.git \
     "*.dat"
$ cd git-lfs-migrate-test-converted.git
$ git log -p | grep empty.dat -A 10
diff --git a/empty.dat b/empty.dat
new file mode 100644
index 0000000..fc8e42b
--- /dev/null
+++ b/empty.dat
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
+size 0

When I push it to github, I can't clone it.

$ git lfs clone https://github.com/kna/git-lfs-migrate-test-converted
Cloning into 'git-lfs-migrate-test-converted'...
remote: Counting objects: 4, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 4 (delta 0), reused 4 (delta 0), pack-reused 0
Unpacking objects: 100% (4/4), done.
Checking connectivity... done.
Git LFS: (1 of 1 files) 0 B / 0 B                                                                                                                                     Skipped checkout for empty.dat, content not local. Use fetch to download.

Errors logged to /tmp/git-lfs-migrate-test-converted/.git/lfs/objects/logs/20161014T121953.084344008.log
Use `git lfs logs last` to view the log.


$ cat /tmp/git-lfs-migrate-test-converted/.git/lfs/objects/logs/20161014T121953.084344008.log
git-lfs/1.4.2 (GitHub; linux amd64; go 1.7)
git version 1.9.1

$ git-lfs clone https://github.com/kna/git-lfs-migrate-test-converted
Skipped checkout for empty.dat, content not local. Use fetch to download.

smudge: Error
github.com/github/git-lfs/errors.newWrappedError
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/errors/types.go:166
github.com/github/git-lfs/errors.NewDownloadDeclinedError
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/errors/types.go:317
github.com/github/git-lfs/lfs.PointerSmudge
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/lfs/pointer_smudge.go:62
github.com/github/git-lfs/lfs.PointerSmudgeToFile
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/lfs/pointer_smudge.go:27
github.com/github/git-lfs/commands.checkoutWithChan
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/commands/command_checkout.go:194
github.com/github/git-lfs/commands.checkoutFromFetchChan.func1
        /tmp/docker_run/src/github.com/github/git-lfs/amd64/obj-x86_64-linux-gnu/src/github.com/github/git-lfs/commands/command_checkout.go:70
runtime.goexit
        /usr/local/go/src/runtime/asm_amd64.s:2086

ENV:
LocalWorkingDir=/tmp/git-lfs-migrate-test-converted
LocalGitDir=/tmp/git-lfs-migrate-test-converted/.git
LocalGitStorageDir=/tmp/git-lfs-migrate-test-converted/.git
LocalMediaDir=/tmp/git-lfs-migrate-test-converted/.git/lfs/objects
LocalReferenceDir=
TempDir=/tmp/git-lfs-migrate-test-converted/.git/lfs/tmp
ConcurrentTransfers=3
TusTransfers=false
BasicTransfersOnly=false
BatchTransfer=true
SkipDownloadErrors=false
FetchRecentAlways=false
FetchRecentRefsDays=7
FetchRecentCommitsDays=0
FetchRecentRefsIncludeRemotes=true
PruneOffsetDays=3
PruneVerifyRemoteAlways=false
PruneRemoteName=origin
AccessDownload=none
AccessUpload=none
DownloadTransfers=basic
UploadTransfers=basic

git-lfs-migrate should not convert zero length file to a pointer file.

[kna]

I created the pull-request to fix this issue -> #22

[bozaro]

Thanks a lot. This issue is now fixed in 0.2.3 version.

[kna]

Thank you!