Merge branch 'ls/p4-empty-file-on-lfs' into maint

"git p4" LFS support was broken when LFS stores an empty blob.

* ls/p4-empty-file-on-lfs:
  git-p4: fix empty file processing for large file system backend GitLFS

git-p4.py

@@ -1005,8 +1005,10 @@ class LargeFileSystem(object):
            steps."""
         if self.exceedsLargeFileThreshold(relPath, contents) or self.hasLargeFileExtension(relPath):
             contentTempFile = self.generateTempFile(contents)
-            (git_mode, contents, localLargeFile) = self.generatePointer(contentTempFile)
-
+            (pointer_git_mode, contents, localLargeFile) = self.generatePointer(contentTempFile)
+            if pointer_git_mode:
+                git_mode = pointer_git_mode
+            if localLargeFile:
                 # Move temp file to final location in large file system
                 largeFileDir = os.path.dirname(localLargeFile)
                 if not os.path.isdir(largeFileDir):
@@ -1056,6 +1058,9 @@ class GitLFS(LargeFileSystem):
            the actual content. Return also the new location of the actual
            content.
            """
+        if os.path.getsize(contentFile) == 0:
+            return (None, '', None)
+
         pointerProcess = subprocess.Popen(
             ['git', 'lfs', 'pointer', '--file=' + contentFile],
             stdout=subprocess.PIPE

t/t9824-git-p4-git-lfs.sh

@@ -42,6 +42,8 @@ test_expect_success 'Create repo with binary files' '
 	(
 		cd "$cli" &&
 
+		>file0.dat &&
+		p4 add file0.dat &&
 		echo "content 1 txt 23 bytes" >file1.txt &&
 		p4 add file1.txt &&
 		echo "content 2-3 bin 25 bytes" >file2.dat &&