Re: [PATCH v1] git-p4: Add option to ignore empty commits

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On 19/10/15 19:43, larsxschneider@xxxxxxxxx wrote:
From: Lars Schneider <larsxschneider@xxxxxxxxx>

A changelist that contains only excluded files (e.g. via client spec or
branch prefix) will be imported as empty commit. Add option
"git-p4.ignoreEmptyCommits" to ignore these commits.

Signed-off-by: Lars Schneider <larsxschneider@xxxxxxxxx>
---
  Documentation/git-p4.txt               |   5 ++
  git-p4.py                              |  41 ++++++++-----
  t/t9826-git-p4-ignore-empty-commits.sh | 103 +++++++++++++++++++++++++++++++++
  3 files changed, 133 insertions(+), 16 deletions(-)
  create mode 100755 t/t9826-git-p4-ignore-empty-commits.sh

diff --git a/Documentation/git-p4.txt b/Documentation/git-p4.txt
index 82aa5d6..f096a6a 100644
--- a/Documentation/git-p4.txt
+++ b/Documentation/git-p4.txt
@@ -510,6 +510,11 @@ git-p4.useClientSpec::
  	option '--use-client-spec'.  See the "CLIENT SPEC" section above.
  	This variable is a boolean, not the name of a p4 client.

+git-p4.ignoreEmptyCommits::
+	A changelist that contains only excluded files will be imported
+	as empty commit. To ignore these commits set this boolean option
+	to 'true'.

s/as empty/as an empty/

Possibly putting 'true' in quotes could be confusing.

+
  Submit variables
  ~~~~~~~~~~~~~~~~
  git-p4.detectRenames::
diff --git a/git-p4.py b/git-p4.py
index 0093fa3..6c50c74 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -2288,12 +2288,6 @@ class P4Sync(Command, P4UserMap):
          filesToDelete = []

          for f in files:
-            # if using a client spec, only add the files that have
-            # a path in the client
-            if self.clientSpecDirs:
-                if self.clientSpecDirs.map_in_client(f['path']) == "":
-                    continue
-
              filesForCommit.append(f)
              if f['action'] in self.delete_actions:
                  filesToDelete.append(f)
@@ -2368,18 +2362,33 @@ class P4Sync(Command, P4UserMap):
          if self.verbose:
              print "commit into %s" % branch

-        # start with reading files; if that fails, we should not
-        # create a commit.
-        new_files = []
-        for f in files:
-            if [p for p in self.branchPrefixes if p4PathStartsWith(f['path'], p)]:
-                new_files.append (f)
-            else:
-                sys.stderr.write("Ignoring file outside of prefix: %s\n" % f['path'])
-
          if self.clientSpecDirs:
              self.clientSpecDirs.update_client_spec_path_cache(files)

+        def inClientSpec(path):

This seems to be adding a new function in the middle of an existing function. Is that right?

+            if not self.clientSpecDirs:
+                return True
+            inClientSpec = self.clientSpecDirs.map_in_client(path)
+            if not inClientSpec and self.verbose:
+                print '\n  Ignoring file outside of client spec' % path
+            return inClientSpec

Any particular reason for putting a \n at the start of the message?

Also, could you use python3 style print stmnts, print("whatever") ?



+
+        def hasBranchPrefix(path):
+            if not self.branchPrefixes:
+                return True
+            hasPrefix = [p for p in self.branchPrefixes
+                            if p4PathStartsWith(path, p)]
+            if hasPrefix and self.verbose:
+                print '\n  Ignoring file outside of prefix: %s' % path
+            return hasPrefix
+
+        files = [f for f in files
+            if inClientSpec(f['path']) and hasBranchPrefix(f['path'])]
+
+        if not files and gitConfigBool('git-p4.ignoreEmptyCommits'):
+            print '\n  Ignoring change %s as it would produce an empty commit.'
+            return

As with Junio's comment elsewhere, I worry about deletion here.


+
          self.gitStream.write("commit %s\n" % branch)
  #        gitStream.write("mark :%s\n" % details["change"])
          self.committedChanges.add(int(details["change"]))
@@ -2403,7 +2412,7 @@ class P4Sync(Command, P4UserMap):
                  print "parent %s" % parent
              self.gitStream.write("from %s\n" % parent)

-        self.streamP4Files(new_files)
+        self.streamP4Files(files)
          self.gitStream.write("\n")

          change = int(details["change"])
diff --git a/t/t9826-git-p4-ignore-empty-commits.sh b/t/t9826-git-p4-ignore-empty-commits.sh
new file mode 100755
index 0000000..5ddccde
--- /dev/null
+++ b/t/t9826-git-p4-ignore-empty-commits.sh
@@ -0,0 +1,103 @@
+#!/bin/sh
+
+test_description='Clone repositories and ignore empty commits'
+
+. ./lib-git-p4.sh
+
+test_expect_success 'start p4d' '
+	start_p4d
+'
+
+test_expect_success 'Create a repo' '
+	client_view "//depot/... //client/..." &&
+	(
+		cd "$cli" &&
+
+		mkdir -p subdir &&
+
+		>subdir/file1.txt &&
+		p4 add subdir/file1.txt &&
+		p4 submit -d "Add file 1" &&
+
+		>file2.txt &&
+		p4 add file2.txt &&
+		p4 submit -d "Add file 2" &&
+
+		>subdir/file3.txt &&
+		p4 add subdir/file3.txt &&
+		p4 submit -d "Add file 3"
+	)
+'
+
+test_expect_success 'Clone repo root path with all history' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	(
+		cd "$git" &&
+		git init . &&
+		git p4 clone --use-client-spec --destination="$git" //depot@all &&
+		cat >expect <<-\EOF &&
+Add file 3
+[git-p4: depot-paths = "//depot/": change = 3]
+
+Add file 2
+[git-p4: depot-paths = "//depot/": change = 2]
+
+Add file 1
+[git-p4: depot-paths = "//depot/": change = 1]

Could you not just test for existence of these files?

If the format of the magic comments that git-p4 ever changes, this will break.

(There's a patch out there that gets git-p4 to use git notes, so it's not as far-fetched as it sounds).


+
+		EOF
+		git log --format=%B >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'Clone repo subdir with all history' '
+	client_view "//depot/subdir/... //client/subdir/..." &&
+	test_when_finished cleanup_git &&
+	(
+		cd "$git" &&
+		git init . &&
+		git p4 clone --use-client-spec --destination="$git" //depot@all &&
+		cat >expect <<-\EOF &&
+Add file 3
+[git-p4: depot-paths = "//depot/": change = 3]
+
+Add file 2
+[git-p4: depot-paths = "//depot/": change = 2]
+
+Add file 1
+[git-p4: depot-paths = "//depot/": change = 1]
+
+		EOF
+		git log --format=%B >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'Clone repo subdir with all history but ignore empty commits' '
+	client_view "//depot/subdir/... //client/subdir/..." &&
+	test_when_finished cleanup_git &&
+	(
+		cd "$git" &&
+		git init . &&
+		git config git-p4.ignoreEmptyCommits true &&
+		git p4 clone --use-client-spec --destination="$git" //depot@all &&
+		cat >expect <<-\EOF &&
+Add file 3
+[git-p4: depot-paths = "//depot/": change = 3]
+
+Add file 1
+[git-p4: depot-paths = "//depot/": change = 1]
+
+		EOF
+		git log --format=%B >actual &&


A deletion test would make me feel more comfortable!

Thanks!
Luke

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