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authorPete Wyckoff <pw@padd.com>2012-01-02 23:05:53 (GMT)
committerJunio C Hamano <gitster@pobox.com>2012-01-03 22:10:03 (GMT)
commitecb7cf98a7d02e943ce44b083639c75011f3d8ec (patch)
treeaa941239bc406fa7ed619b32d12587b0a1eca643 /contrib/fast-import
parente3e68643b5c2adec097ba26230e0fcb641febacb (diff)
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git-p4: rewrite view handling
The old code was not very complete or robust. Redo it. This new code should be useful for a few possible additions in the future: - support for * and %%n wildcards - allowing ... inside paths - representing branch specs (not just client specs) - tracking changes to views Mark the remaining 12 tests in t9809 as fixed. Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'contrib/fast-import')
-rwxr-xr-xcontrib/fast-import/git-p4335
1 files changed, 246 insertions, 89 deletions
diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4
index 8f28e0a..3e1aa27 100755
--- a/contrib/fast-import/git-p4
+++ b/contrib/fast-import/git-p4
@@ -1169,6 +1169,218 @@ class P4Submit(Command, P4UserMap):
return True
+class View(object):
+ """Represent a p4 view ("p4 help views"), and map files in a
+ repo according to the view."""
+
+ class Path(object):
+ """A depot or client path, possibly containing wildcards.
+ The only one supported is ... at the end, currently.
+ Initialize with the full path, with //depot or //client."""
+
+ def __init__(self, path, is_depot):
+ self.path = path
+ self.is_depot = is_depot
+ self.find_wildcards()
+ # remember the prefix bit, useful for relative mappings
+ m = re.match("(//[^/]+/)", self.path)
+ if not m:
+ die("Path %s does not start with //prefix/" % self.path)
+ prefix = m.group(1)
+ if not self.is_depot:
+ # strip //client/ on client paths
+ self.path = self.path[len(prefix):]
+
+ def find_wildcards(self):
+ """Make sure wildcards are valid, and set up internal
+ variables."""
+
+ self.ends_triple_dot = False
+ # There are three wildcards allowed in p4 views
+ # (see "p4 help views"). This code knows how to
+ # handle "..." (only at the end), but cannot deal with
+ # "%%n" or "*". Only check the depot_side, as p4 should
+ # validate that the client_side matches too.
+ if re.search(r'%%[1-9]', self.path):
+ die("Can't handle %%n wildcards in view: %s" % self.path)
+ if self.path.find("*") >= 0:
+ die("Can't handle * wildcards in view: %s" % self.path)
+ triple_dot_index = self.path.find("...")
+ if triple_dot_index >= 0:
+ if not self.path.endswith("..."):
+ die("Can handle ... wildcard only at end of path: %s" %
+ self.path)
+ self.ends_triple_dot = True
+
+ def ensure_compatible(self, other_path):
+ """Make sure the wildcards agree."""
+ if self.ends_triple_dot != other_path.ends_triple_dot:
+ die("Both paths must end with ... if either does;\n" +
+ "paths: %s %s" % (self.path, other_path.path))
+
+ def match_wildcards(self, test_path):
+ """See if this test_path matches us, and fill in the value
+ of the wildcards if so. Returns a tuple of
+ (True|False, wildcards[]). For now, only the ... at end
+ is supported, so at most one wildcard."""
+ if self.ends_triple_dot:
+ dotless = self.path[:-3]
+ if test_path.startswith(dotless):
+ wildcard = test_path[len(dotless):]
+ return (True, [ wildcard ])
+ else:
+ if test_path == self.path:
+ return (True, [])
+ return (False, [])
+
+ def match(self, test_path):
+ """Just return if it matches; don't bother with the wildcards."""
+ b, _ = self.match_wildcards(test_path)
+ return b
+
+ def fill_in_wildcards(self, wildcards):
+ """Return the relative path, with the wildcards filled in
+ if there are any."""
+ if self.ends_triple_dot:
+ return self.path[:-3] + wildcards[0]
+ else:
+ return self.path
+
+ class Mapping(object):
+ def __init__(self, depot_side, client_side, overlay, exclude):
+ # depot_side is without the trailing /... if it had one
+ self.depot_side = View.Path(depot_side, is_depot=True)
+ self.client_side = View.Path(client_side, is_depot=False)
+ self.overlay = overlay # started with "+"
+ self.exclude = exclude # started with "-"
+ assert not (self.overlay and self.exclude)
+ self.depot_side.ensure_compatible(self.client_side)
+
+ def __str__(self):
+ c = " "
+ if self.overlay:
+ c = "+"
+ if self.exclude:
+ c = "-"
+ return "View.Mapping: %s%s -> %s" % \
+ (c, self.depot_side, self.client_side)
+
+ def map_depot_to_client(self, depot_path):
+ """Calculate the client path if using this mapping on the
+ given depot path; does not consider the effect of other
+ mappings in a view. Even excluded mappings are returned."""
+ matches, wildcards = self.depot_side.match_wildcards(depot_path)
+ if not matches:
+ return ""
+ client_path = self.client_side.fill_in_wildcards(wildcards)
+ return client_path
+
+ #
+ # View methods
+ #
+ def __init__(self):
+ self.mappings = []
+
+ def append(self, view_line):
+ """Parse a view line, splitting it into depot and client
+ sides. Append to self.mappings, preserving order."""
+
+ # Split the view line into exactly two words. P4 enforces
+ # structure on these lines that simplifies this quite a bit.
+ #
+ # Either or both words may be double-quoted.
+ # Single quotes do not matter.
+ # Double-quote marks cannot occur inside the words.
+ # A + or - prefix is also inside the quotes.
+ # There are no quotes unless they contain a space.
+ # The line is already white-space stripped.
+ # The two words are separated by a single space.
+ #
+ if view_line[0] == '"':
+ # First word is double quoted. Find its end.
+ close_quote_index = view_line.find('"', 1)
+ if close_quote_index <= 0:
+ die("No first-word closing quote found: %s" % view_line)
+ depot_side = view_line[1:close_quote_index]
+ # skip closing quote and space
+ rhs_index = close_quote_index + 1 + 1
+ else:
+ space_index = view_line.find(" ")
+ if space_index <= 0:
+ die("No word-splitting space found: %s" % view_line)
+ depot_side = view_line[0:space_index]
+ rhs_index = space_index + 1
+
+ if view_line[rhs_index] == '"':
+ # Second word is double quoted. Make sure there is a
+ # double quote at the end too.
+ if not view_line.endswith('"'):
+ die("View line with rhs quote should end with one: %s" %
+ view_line)
+ # skip the quotes
+ client_side = view_line[rhs_index+1:-1]
+ else:
+ client_side = view_line[rhs_index:]
+
+ # prefix + means overlay on previous mapping
+ overlay = False
+ if depot_side.startswith("+"):
+ overlay = True
+ depot_side = depot_side[1:]
+
+ # prefix - means exclude this path
+ exclude = False
+ if depot_side.startswith("-"):
+ exclude = True
+ depot_side = depot_side[1:]
+
+ m = View.Mapping(depot_side, client_side, overlay, exclude)
+ self.mappings.append(m)
+
+ def map_in_client(self, depot_path):
+ """Return the relative location in the client where this
+ depot file should live. Returns "" if the file should
+ not be mapped in the client."""
+
+ paths_filled = []
+ client_path = ""
+
+ # look at later entries first
+ for m in self.mappings[::-1]:
+
+ # see where will this path end up in the client
+ p = m.map_depot_to_client(depot_path)
+
+ if p == "":
+ # Depot path does not belong in client. Must remember
+ # this, as previous items should not cause files to
+ # exist in this path either. Remember that the list is
+ # being walked from the end, which has higher precedence.
+ # Overlap mappings do not exclude previous mappings.
+ if not m.overlay:
+ paths_filled.append(m.client_side)
+
+ else:
+ # This mapping matched; no need to search any further.
+ # But, the mapping could be rejected if the client path
+ # has already been claimed by an earlier mapping.
+ already_mapped_in_client = False
+ for f in paths_filled:
+ # this is View.Path.match
+ if f.match(p):
+ already_mapped_in_client = True
+ break
+ if not already_mapped_in_client:
+ # Include this file, unless it is from a line that
+ # explicitly said to exclude it.
+ if not m.exclude:
+ client_path = p
+
+ # a match, even if rejected, always stops the search
+ break
+
+ return client_path
+
class P4Sync(Command, P4UserMap):
delete_actions = ( "delete", "move/delete", "purge" )
@@ -1216,8 +1428,7 @@ class P4Sync(Command, P4UserMap):
self.p4BranchesInGit = []
self.cloneExclude = []
self.useClientSpec = False
- self.clientSpecDirs = []
- self.haveSingleFileClientViews = False
+ self.clientSpecDirs = None
if gitConfig("git-p4.syncFromOrigin") == "false":
self.syncWithOrigin = False
@@ -1268,30 +1479,7 @@ class P4Sync(Command, P4UserMap):
def stripRepoPath(self, path, prefixes):
if self.useClientSpec:
-
- # if using the client spec, we use the output directory
- # specified in the client. For example, a view
- # //depot/foo/branch/... //client/branch/foo/...
- # will end up putting all foo/branch files into
- # branch/foo/
- for val in self.clientSpecDirs:
- if self.haveSingleFileClientViews and len(path) == abs(val[1][0]) and path == val[0]:
- # since 'path' is a depot file path, if it matches the LeftMap,
- # then the View is a single file mapping, so use the entire rightMap
- # first two tests above avoid the last == test for common cases
- path = val[1][1]
- # now strip out the client (//client/...)
- path = re.sub("^(//[^/]+/)", '', path)
- # the rest is local client path
- return path
-
- if path.startswith(val[0]):
- # replace the depot path with the client path
- path = path.replace(val[0], val[1][1])
- # now strip out the client (//client/...)
- path = re.sub("^(//[^/]+/)", '', path)
- # the rest is all path
- return path
+ return self.clientSpecDirs.map_in_client(path)
if self.keepRepoPath:
prefixes = [re.sub("^(//[^/]+/).*", r'\1', prefixes[0])]
@@ -1441,19 +1629,17 @@ class P4Sync(Command, P4UserMap):
filesToDelete = []
for f in files:
- includeFile = True
- for val in self.clientSpecDirs:
- if f['path'].startswith(val[0]):
- if val[1][0] <= 0:
- includeFile = False
- break
+ # 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
- if includeFile:
- filesForCommit.append(f)
- if f['action'] in self.delete_actions:
- filesToDelete.append(f)
- else:
- filesToRead.append(f)
+ filesForCommit.append(f)
+ if f['action'] in self.delete_actions:
+ filesToDelete.append(f)
+ else:
+ filesToRead.append(f)
# deleted files...
for f in filesToDelete:
@@ -1892,60 +2078,31 @@ class P4Sync(Command, P4UserMap):
def getClientSpec(self):
- specList = p4CmdList( "client -o" )
- temp = {}
- for entry in specList:
- for k,v in entry.iteritems():
- if k.startswith("View"):
-
- # p4 has these %%1 to %%9 arguments in specs to
- # reorder paths; which we can't handle (yet :)
- if re.search('%%\d', v) != None:
- print "Sorry, can't handle %%n arguments in client specs"
- sys.exit(1)
- if re.search('\*', v) != None:
- print "Sorry, can't handle * mappings in client specs"
- sys.exit(1)
-
- if v.startswith('"'):
- start = 1
- else:
- start = 0
- index = v.find("...")
-
- # save the "client view"; i.e the RHS of the view
- # line that tells the client where to put the
- # files for this view.
-
- # check for individual file mappings - those which have no '...'
- if index < 0 :
- v,cv = v.strip().split()
- v = v[start:]
- self.haveSingleFileClientViews = True
- else:
- cv = v[index+3:].strip() # +3 to remove previous '...'
- cv=cv[:-3]
- v = v[start:index]
-
- # now save the view; +index means included, -index
- # means it should be filtered out.
- if v.startswith("-"):
- v = v[1:]
- include = -len(v)
- else:
- include = len(v)
+ specList = p4CmdList("client -o")
+ if len(specList) != 1:
+ die('Output from "client -o" is %d lines, expecting 1' %
+ len(specList))
+
+ # dictionary of all client parameters
+ entry = specList[0]
+
+ # just the keys that start with "View"
+ view_keys = [ k for k in entry.keys() if k.startswith("View") ]
+
+ # hold this new View
+ view = View()
- # store the View #number for sorting
- # and the View string itself (this last for documentation)
- temp[v] = (include, cv, int(k[4:]),k)
+ # append the lines, in order, to the view
+ for view_num in range(len(view_keys)):
+ k = "View%d" % view_num
+ if k not in view_keys:
+ die("Expected view key %s missing" % k)
+ view.append(entry[k])
- self.clientSpecDirs = temp.items()
- # Perforce ViewNN with higher #numbers override those with lower
- # reverse sort on the View #number
- self.clientSpecDirs.sort( lambda x, y: y[1][2] - x[1][2] )
+ self.clientSpecDirs = view
if self.verbose:
- for val in self.clientSpecDirs:
- print "clientSpecDirs: %s %s" % (val[0],val[1])
+ for i, m in enumerate(self.clientSpecDirs.mappings):
+ print "clientSpecDirs %d: %s" % (i, str(m))
def run(self, args):
self.depotPaths = []