[PATCH v3 3/8] git-p4: match branches case insensitively if configured

["Mazo, Andrey" <amazo@xxxxxxxxxxxxxx>]

git-p4 knows how to handle case insensitivity in file paths
if core.ignorecase is set.
However, when determining a branch for a file,
it still does a case-sensitive prefix match.
This may result in some file changes to be lost on import.

For example, given the following commits
 1. add //depot/main/file1
 2. add //depot/DirA/file2
 3. add //depot/dira/file3
 4. add //depot/DirA/file4
and "branchList = main:DirA" branch mapping,
commit 3 will be lost.

So, do branch search case insensitively if running with core.ignorecase set.
Teach splitFilesIntoBranches() to use the p4PathStartsWith() function
for path prefix matches instead of always case-sensitive match.

Signed-off-by: Andrey Mazo <amazo@xxxxxxxxxxxxxx>
---
 git-p4.py                | 4 ++--
 t/t9801-git-p4-branch.sh | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/git-p4.py b/git-p4.py
index c0a3068b6f..f3e5ccb7af 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -2666,11 +2666,11 @@ def stripRepoPath(self, path, prefixes):
             # branch detection moves files up a level (the branch name)
             # from what client spec interpretation gives
             path = self.clientSpecDirs.map_in_client(path)
             if self.detectBranches:
                 for b in self.knownBranches:
-                    if path.startswith(b + "/"):
+                    if p4PathStartsWith(path, b + "/"):
                         path = path[len(b)+1:]
 
         elif self.keepRepoPath:
             # Preserve everything in relative path name except leading
             # //depot/; just look at first prefix as they all should
@@ -2721,11 +2721,11 @@ def splitFilesIntoBranches(self, commit):
                 relPath = self.stripRepoPath(path, self.depotPaths)
 
             for branch in self.knownBranches.keys():
                 # add a trailing slash so that a commit into qt/4.2foo
                 # doesn't end up in qt/4.2, e.g.
-                if relPath.startswith(branch + "/"):
+                if p4PathStartsWith(relPath, branch + "/"):
                     if branch not in branches:
                         branches[branch] = []
                     branches[branch].append(file)
                     break
 
diff --git a/t/t9801-git-p4-branch.sh b/t/t9801-git-p4-branch.sh
index c48532e12b..4779448b4c 100755
--- a/t/t9801-git-p4-branch.sh
+++ b/t/t9801-git-p4-branch.sh
@@ -648,11 +648,11 @@ test_expect_success !CASE_INSENSITIVE_FS 'basic p4 branches for case folding' '
 		p4 submit -d "branch1/b1f4"
 	)
 '
 
 # Check that files are properly split across branches when ignorecase is set
-test_expect_failure !CASE_INSENSITIVE_FS 'git p4 clone, branchList branch definition, ignorecase' '
+test_expect_success !CASE_INSENSITIVE_FS 'git p4 clone, branchList branch definition, ignorecase' '
 	test_when_finished cleanup_git &&
 	test_create_repo "$git" &&
 	(
 		cd "$git" &&
 		git config git-p4.branchList main:branch1 &&
@@ -674,11 +674,11 @@ test_expect_failure !CASE_INSENSITIVE_FS 'git p4 clone, branchList branch defini
 		test_path_is_file b1f4
 	)
 '
 
 # Check that files are properly split across branches when ignorecase is set, use-client-spec case
-test_expect_failure !CASE_INSENSITIVE_FS 'git p4 clone with client-spec, branchList branch definition, ignorecase' '
+test_expect_success !CASE_INSENSITIVE_FS 'git p4 clone with client-spec, branchList branch definition, ignorecase' '
 	client_view "//depot/... //client/..." &&
 	test_when_finished cleanup_git &&
 	test_create_repo "$git" &&
 	(
 		cd "$git" &&
-- 
2.19.2