Lars - thanks for persisting with this!
I'm still trying to fully understand what's going on here - can you
point out where I've got it wrong below please!
The server is on Linux, and is case-sensitive. For whatever reason
(probably people committing changes on Windows in the first place)
we've ended up with a P4 repo that has differences in path case that
need to be ignored, with all upper-case paths being mapped to
lower-case.
e.g. the *real* depot might be:
//depot/path/File1
//depot/PATH/File2
git-p4 clone should return this case-folded on Windows (and Linux?)
$GIT_DIR/path/File1
$GIT_DIR/path/File2
(Am I right in thinking that this change folds the directory, but not
the filename?)
I don't really understand why a dictionary is required to do this
though - is there a reason we can't just lowercase all incoming paths?
Which is what the existing code in p4StartWith() is trying to do. That
code lowercases the *entire* path including the filename; this change
seems to leave the filename portion unchanged. I guess though that the
answer may be to do with your finding that P4 makes up the case of
directories based on lexicographic ordering - is that the basic
problem?
For a large repo, this approach is surely going to be really slow.
Additionally, could you update your patch to add some words to
Documentation/git-p4.txt please?
A few other comments inline.
Thanks!
Luke
On 21 August 2015 at 18:19, <larsxschnei...@gmail.com> wrote:
> From: Lars Schneider <larsxschnei...@gmail.com>
>
> PROBLEM:
> We run P4 servers on Linux and P4 clients on Windows. For an unknown
> reason the file path for a number of files in P4 does not match the
> directory path with respect to case sensitivity.
>
> E.g. `p4 files` might return
> //depot/path/to/file1
> //depot/PATH/to/file2
>
> If you use P4/P4V then these files end up in the same directory, e.g.
> //depot/path/to/file1
> //depot/path/to/file2
>
> If you use git-p4 then all files not matching the correct file path
> (e.g. `file2`) will be ignored.
I'd like to think that the existing code that checks core.ignorecase
should handle this. I haven't tried it myself though.
>
> SOLUTION:
> Identify path names that are different with respect to case sensitivity.
> If there are any then run `p4 dirs` to build up a dictionary
> containing the "correct" cases for each path. It looks like P4
> interprets "correct" here as the existing path of the first file in a
> directory. The path dictionary is used later on to fix all paths.
>
> This is only applied if the parameter "--ignore-path-case" is passed to
> the git-p4 clone command.
>
> Signed-off-by: Lars Schneider <larsxschnei...@gmail.com>
> ---
> git-p4.py | 82 ++++++++++++++++++++++++++--
> t/t9821-git-p4-path-variations.sh | 109
> ++++++++++++++++++++++++++++++++++++++
> 2 files changed, 187 insertions(+), 4 deletions(-)
> create mode 100755 t/t9821-git-p4-path-variations.sh
>
> diff --git a/git-p4.py b/git-p4.py
> index 073f87b..61a587b 100755
> --- a/git-p4.py
> +++ b/git-p4.py
> @@ -1931,7 +1931,7 @@ class View(object):
> (self.client_prefix, clientFile))
> return clientFile[len(self.client_prefix):]
>
> - def update_client_spec_path_cache(self, files):
> + def update_client_spec_path_cache(self, files, fixPathCase = None):
> """ Caching file paths by "p4 where" batch query """
>
> # List depot file paths exclude that already cached
> @@ -1950,6 +1950,8 @@ class View(object):
> if "unmap" in res:
> # it will list all of them, but only one not unmap-ped
> continue
> + if fixPathCase:
> + res['depotFile'] = fixPathCase(res['depotFile'])
> self.client_spec_path_cache[res['depotFile']] =
> self.convert_client_path(res["clientFile"])
>
> # not found files or unmap files set to ""
> @@ -1987,6 +1989,7 @@ class P4Sync(Command, P4UserMap):
> help="Maximum number of changes to
> import"),
> optparse.make_option("--changes-block-size",
> dest="changes_block_size", type="int",
> help="Internal block size to use when
> iteratively calling p4 changes"),
> + optparse.make_option("--ignore-path-case",
> dest="ignorePathCase", action="store_true"),
> optparse.make_option("--keep-path", dest="keepRepoPath",
> action='store_true',
> help="Keep entire BRANCH/DIR/SUBDIR
> prefix during import"),
> optparse.make_option("--use-client-spec",
> dest="useClientSpec", action='store_true',
> @@ -2017,6 +2020,7 @@ class P4Sync(Command, P4UserMap):
> self.maxChanges = ""
> self.changes_block_size = None
> self.keepRepoPath = False
> + self.ignorePathCase = False
> self.depotPaths = None
> self.p4BranchesInGit = []
> self.cloneExclude = []
> @@ -2049,7 +2053,8 @@ class P4Sync(Command, P4UserMap):
> files = []
> fnum = 0
> while commit.has_key("depotFile%s" % fnum):
> - path = commit["depotFile%s" % fnum]
> + path = commit["depotFile%s" % fnum]
> + path = self.fixPathCase(path)
>
> if [p for p in self.cloneExclude
> if p4PathStartsWith(path, p)]:
> @@ -2113,7 +2118,9 @@ class P4Sync(Command, P4UserMap):
> branches = {}
> fnum = 0
> while commit.has_key("depotFile%s" % fnum):
> - path = commit["depotFile%s" % fnum]
> + path = commit["depotFile%s" % fnum]
> + path = self.fixPathCase(path)
> +
> found = [p for p in self.depotPaths
> if p4PathStartsWith(path, p)]
> if not found:
> @@ -2240,6 +2247,10 @@ class P4Sync(Command, P4UserMap):
> if marshalled["code"] == "error":
> if "data" in marshalled:
> err = marshalled["data"].rstrip()
> +
> + if "depotFile" in marshalled:
> + marshalled['depotFile'] =
> self.fixPathCase(marshalled['depotFile'])
> +
> if err:
> f = None
> if self.stream_have_file_info:
> @@ -2314,6 +2325,7 @@ class P4Sync(Command, P4UserMap):
>
> # do the last chunk
> if self.stream_file.has_key('depotFile'):
> + self.stream_file['depotFile'] =
> self.fixPathCase(self.stream_file['depotFile'])
> self.streamOneP4File(self.stream_file, self.stream_contents)
>
> def make_email(self, userid):
> @@ -2371,7 +2383,8 @@ class P4Sync(Command, P4UserMap):
> sys.stderr.write("Ignoring file outside of prefix: %s\n" %
> f['path'])
>
> if self.clientSpecDirs:
> - self.clientSpecDirs.update_client_spec_path_cache(files)
> + self.clientSpecDirs.update_client_spec_path_cache(
> + files, lambda x: self.fixPathCase(x))
>
> self.gitStream.write("commit %s\n" % branch)
> # gitStream.write("mark :%s\n" % details["change"])
> @@ -2835,6 +2848,62 @@ class P4Sync(Command, P4UserMap):
> print "IO error with git fast-import. Is your git version recent
> enough?"
> print self.gitError.read()
>
> + def fixPathCase(self, path):
> + if self.caseCorrectedPaths:
> + components = path.split('/')
> + filename = components.pop()
> + dirname = '/'.join(components).lower() + '/'
> + if dirname in self.caseCorrectedPaths:
> + path = self.caseCorrectedPaths[dirname] + filename
> + return path
> +
> + def generatePathCaseDict(self, clientPrefix):
> + # Query all files and generate a list of all used paths
> + # e.g. this files list:
> + # //depot/path/to/file1
> + # //depot/PATH/to/file2
> + #
> + # result in this path list:
> + # //depot/
> + # //depot/PATH/
> + # //depot/path/
> + # //depot/PATH/to/
> + # //depot/path/to/
> + p4_paths = set()
> + for f in p4CmdList(["files", clientPrefix + "..."]):
> + components = f["depotFile"].split('/')[0:-1]
> + for i in range(3, len(components)+1):
> + p4_paths.add('/'.join(components[0:i]) + '/')
> + p4_paths = sorted(list(p4_paths), key=len)
> +
> + if len(p4_paths) > len(set([p.lower() for p in p4_paths])):
> + print "ATTENTION: File paths with different case variations
> detected. Fixing may take a while..."
Does this really need "ATTENTION" in the output?
> + found_variations = True
> + while found_variations:
> + for path in p4_paths:
> + found_variations = False
> + path_variations = [p for p in p4_paths if p.lower() ==
> path.lower()]
> +
> + if len(path_variations) > 1:
> + print "%i different case variations for path '%s'
> detected." % (len(path_variations), path)
> + # If we detect path variations (e.g. //depot/path
> and //depot/PATH) then we query P4 to list
> + # the subdirectories of the parent (e.g //depot/*).
> P4 will return these subdirectories with
> + # the correct case.
> + parent_path = '/'.join(path.split('/')[0:-2])
> + case_ok_paths = [p["dir"] + '/' for p in
> p4CmdList(["dirs", "-D", parent_path + '/*'])]
> +
> + # Replace all known paths with the case corrected
> path from P4 dirs command
> + for case_ok_path in case_ok_paths:
> + pattern = re.compile("^" +
> re.escape(case_ok_path), re.IGNORECASE)
> + p4_paths =
> sorted(list(set([pattern.sub(case_ok_path, p) for p in p4_paths])), key=len)
Sorry, I don't quite get what this is doing.
We're generating a list of all of the files in the depot being cloned.
>From that we get a set of all of the paths, sorted by length.
And then we seem to repeatedly rewrite that set with a new set where
each element has been replaced using a regular expression in a way
that I don't quite understand....
> +
> + found_variations = True
> + break
> + return dict((p.lower(), p) for p in p4_paths)
... and then we just return a dictionary that maps every path to a
lowercase version of itself? So couldn't we have just blindly
lowercased all the paths in the first place?
> + else:
> + if self.verbose:
> + print "All file paths have consistent case"
> + return None
>
> def run(self, args):
> self.depotPaths = []
> @@ -3006,6 +3075,11 @@ class P4Sync(Command, P4UserMap):
>
> self.depotPaths = newPaths
>
> + if self.ignorePathCase and self.clientSpecDirs:
> + self.caseCorrectedPaths =
> self.generatePathCaseDict(self.clientSpecDirs.client_prefix)
> + else:
> + self.caseCorrectedPaths = None
> +
> # --detect-branches may change this for each branch
> self.branchPrefixes = self.depotPaths
>
> diff --git a/t/t9821-git-p4-path-variations.sh
> b/t/t9821-git-p4-path-variations.sh
> new file mode 100755
> index 0000000..90515a1
> --- /dev/null
> +++ b/t/t9821-git-p4-path-variations.sh
> @@ -0,0 +1,109 @@
> +#!/bin/sh
> +
> +test_description='Clone repositories with path case variations'
> +
> +. ./lib-git-p4.sh
> +
> +test_expect_success 'start p4d with case folding enabled' '
> + start_p4d -C1
> +'
> +
> +test_expect_success 'Create a repo with path case variations' '
> + client_view "//depot/... //client/..." &&
> + (
> + cd "$cli" &&
> +
> + mkdir -p One/two &&
> + >One/two/File2.txt &&
> + p4 add One/two/File2.txt &&
> + p4 submit -d "Add file2" &&
> + rm -rf One &&
> +
> + mkdir -p one/TWO &&
> + >one/TWO/file1.txt &&
> + p4 add one/TWO/file1.txt &&
> + p4 submit -d "Add file1" &&
> + rm -rf one &&
> +
> + mkdir -p one/two &&
> + >one/two/file3.txt &&
> + p4 add one/two/file3.txt &&
> + p4 submit -d "Add file3" &&
> + rm -rf one &&
> +
> + mkdir -p outside-spec &&
> + >outside-spec/file4.txt &&
> + p4 add outside-spec/file4.txt &&
> + p4 submit -d "Add file4" &&
> + rm -rf outside-spec
> + )
> +'
> +
> +test_expect_success 'Clone the repo and WITHOUT path fixing' '
s/Clone the repo and/Clone the repo WITHOUT/
> + client_view "//depot/One/... //client/..." &&
> + git p4 clone --use-client-spec --destination="$git" //depot &&
> + test_when_finished cleanup_git &&
> + (
> + cd "$git" &&
> + # This method is used instead of "test -f" to ensure the case
> is
> + # checked even if the test is executed on case-insensitive
> file systems.
> + cat >expect <<-\EOF &&
> + two/File2.txt
> + EOF
> + git ls-files >actual &&
> + test_cmp expect actual
> + )
> +'
> +
> +test_expect_success 'Clone the repo WITH path fixing' '
> + client_view "//depot/One/... //client/..." &&
> + git p4 clone --ignore-path-case --use-client-spec
> --destination="$git" //depot &&
> + test_when_finished cleanup_git &&
> + (
> + cd "$git" &&
> + cat >expect <<-\EOF &&
> + TWO/File2.txt
> + TWO/file1.txt
> + TWO/file3.txt
> + EOF
> + git ls-files >actual &&
> + test_cmp expect actual
> + )
> +'
> +
> +# It looks like P4 determines the path case based on the first file in
> +# lexicographical order. Please note the lower case "two" directory for all
> +# files triggered through the addition of "File0.txt".
If that's what P4 is doing, then it's *really* nasty!
> +test_expect_success 'Add a new file and clone the repo WITH path fixing' '
> + client_view "//depot/... //client/..." &&
> + (
> + cd "$cli" &&
> +
> + mkdir -p One/two &&
> + >One/two/File0.txt &&
> + p4 add One/two/File0.txt &&
> + p4 submit -d "Add file" &&
> + rm -rf One
> + ) &&
> +
> + client_view "//depot/One/... //client/..." &&
> + git p4 clone --ignore-path-case --use-client-spec
> --destination="$git" //depot &&
> + test_when_finished cleanup_git &&
> + (
> + cd "$git" &&
> + cat >expect <<-\EOF &&
> + two/File0.txt
> + two/File2.txt
> + two/file1.txt
> + two/file3.txt
> + EOF
> + git ls-files >actual &&
> + test_cmp expect actual
> + )
> +'
> +
> +test_expect_success 'kill p4d' '
> + kill_p4d
> +'
> +
> +test_done
> --
> 1.9.5 (Apple Git-50.3)
>
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