git p4: implement view spec wildcards with "p4 where"
"git p4" does not support many of the view wildcards, such as * and %%n. It only knows the common ... mapping, and exclusions. Redo the entire wildcard code around the idea of directly querying the p4 server for the mapping. For each commit, invoke "p4 where" with committed file paths as args and use the client mapping to decide where the file goes in git. This simplifies a lot of code, and adds support for all wildcards supported by p4. Downside is that there is probably a 20%-ish slowdown with this approach. [pw: redo code and tests] Signed-off-by: Kazuki Saitoh <ksaitoh560@gmail.com> Signed-off-by: Pete Wyckoff <pw@padd.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Kazuki Saitoh
Junio C Hamano
parent
799460316b
commit
9d57c4a697
225
git-p4.py
225
git-p4.py
@ -780,11 +780,14 @@ def getClientSpec():
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# dictionary of all client parameters
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entry = specList[0]
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# the //client/ name
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client_name = entry["Client"]
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# just the keys that start with "View"
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view_keys = [ k for k in entry.keys() if k.startswith("View") ]
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# hold this new View
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view = View()
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view = View(client_name)
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# append the lines, in order, to the view
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for view_num in range(len(view_keys)):
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@ -1555,8 +1558,8 @@ class P4Submit(Command, P4UserMap):
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for b in body:
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labelTemplate += "\t" + b + "\n"
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labelTemplate += "View:\n"
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for mapping in clientSpec.mappings:
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labelTemplate += "\t%s\n" % mapping.depot_side.path
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for depot_side in clientSpec.mappings:
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labelTemplate += "\t%s\n" % depot_side
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if self.dry_run:
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print "Would create p4 label %s for tag" % name
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@ -1568,7 +1571,7 @@ class P4Submit(Command, P4UserMap):
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# Use the label
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p4_system(["tag", "-l", name] +
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["%s@%s" % (mapping.depot_side.path, changelist) for mapping in clientSpec.mappings])
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["%s@%s" % (depot_side, changelist) for depot_side in clientSpec.mappings])
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if verbose:
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print "created p4 label for tag %s" % name
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@ -1796,117 +1799,16 @@ class View(object):
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"""Represent a p4 view ("p4 help views"), and map files in a
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repo according to the view."""
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class Path(object):
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"""A depot or client path, possibly containing wildcards.
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The only one supported is ... at the end, currently.
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Initialize with the full path, with //depot or //client."""
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def __init__(self, path, is_depot):
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self.path = path
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self.is_depot = is_depot
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self.find_wildcards()
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# remember the prefix bit, useful for relative mappings
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m = re.match("(//[^/]+/)", self.path)
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if not m:
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die("Path %s does not start with //prefix/" % self.path)
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prefix = m.group(1)
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if not self.is_depot:
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# strip //client/ on client paths
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self.path = self.path[len(prefix):]
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def find_wildcards(self):
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"""Make sure wildcards are valid, and set up internal
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variables."""
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self.ends_triple_dot = False
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# There are three wildcards allowed in p4 views
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# (see "p4 help views"). This code knows how to
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# handle "..." (only at the end), but cannot deal with
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# "%%n" or "*". Only check the depot_side, as p4 should
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# validate that the client_side matches too.
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if re.search(r'%%[1-9]', self.path):
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die("Can't handle %%n wildcards in view: %s" % self.path)
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if self.path.find("*") >= 0:
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die("Can't handle * wildcards in view: %s" % self.path)
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triple_dot_index = self.path.find("...")
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if triple_dot_index >= 0:
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if triple_dot_index != len(self.path) - 3:
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die("Can handle only single ... wildcard, at end: %s" %
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self.path)
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self.ends_triple_dot = True
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def ensure_compatible(self, other_path):
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"""Make sure the wildcards agree."""
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if self.ends_triple_dot != other_path.ends_triple_dot:
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die("Both paths must end with ... if either does;\n" +
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"paths: %s %s" % (self.path, other_path.path))
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def match_wildcards(self, test_path):
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"""See if this test_path matches us, and fill in the value
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of the wildcards if so. Returns a tuple of
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(True|False, wildcards[]). For now, only the ... at end
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is supported, so at most one wildcard."""
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if self.ends_triple_dot:
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dotless = self.path[:-3]
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if test_path.startswith(dotless):
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wildcard = test_path[len(dotless):]
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return (True, [ wildcard ])
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else:
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if test_path == self.path:
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return (True, [])
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return (False, [])
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def match(self, test_path):
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"""Just return if it matches; don't bother with the wildcards."""
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b, _ = self.match_wildcards(test_path)
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return b
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def fill_in_wildcards(self, wildcards):
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"""Return the relative path, with the wildcards filled in
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if there are any."""
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if self.ends_triple_dot:
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return self.path[:-3] + wildcards[0]
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else:
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return self.path
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class Mapping(object):
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def __init__(self, depot_side, client_side, overlay, exclude):
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# depot_side is without the trailing /... if it had one
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self.depot_side = View.Path(depot_side, is_depot=True)
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self.client_side = View.Path(client_side, is_depot=False)
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self.overlay = overlay # started with "+"
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self.exclude = exclude # started with "-"
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assert not (self.overlay and self.exclude)
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self.depot_side.ensure_compatible(self.client_side)
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def __str__(self):
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c = " "
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if self.overlay:
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c = "+"
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if self.exclude:
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c = "-"
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return "View.Mapping: %s%s -> %s" % \
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(c, self.depot_side.path, self.client_side.path)
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def map_depot_to_client(self, depot_path):
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"""Calculate the client path if using this mapping on the
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given depot path; does not consider the effect of other
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mappings in a view. Even excluded mappings are returned."""
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matches, wildcards = self.depot_side.match_wildcards(depot_path)
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if not matches:
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return ""
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client_path = self.client_side.fill_in_wildcards(wildcards)
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return client_path
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#
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# View methods
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#
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def __init__(self):
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def __init__(self, client_name):
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self.mappings = []
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self.client_prefix = "//%s/" % client_name
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# cache results of "p4 where" to lookup client file locations
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self.client_spec_path_cache = {}
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def append(self, view_line):
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"""Parse a view line, splitting it into depot and client
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sides. Append to self.mappings, preserving order."""
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sides. Append to self.mappings, preserving order. This
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is only needed for tag creation."""
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# Split the view line into exactly two words. P4 enforces
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# structure on these lines that simplifies this quite a bit.
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@ -1934,76 +1836,62 @@ class View(object):
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depot_side = view_line[0:space_index]
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rhs_index = space_index + 1
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if view_line[rhs_index] == '"':
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# Second word is double quoted. Make sure there is a
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# double quote at the end too.
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if not view_line.endswith('"'):
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die("View line with rhs quote should end with one: %s" %
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view_line)
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# skip the quotes
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client_side = view_line[rhs_index+1:-1]
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else:
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client_side = view_line[rhs_index:]
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# prefix + means overlay on previous mapping
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overlay = False
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if depot_side.startswith("+"):
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overlay = True
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depot_side = depot_side[1:]
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# prefix - means exclude this path
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# prefix - means exclude this path, leave out of mappings
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exclude = False
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if depot_side.startswith("-"):
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exclude = True
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depot_side = depot_side[1:]
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m = View.Mapping(depot_side, client_side, overlay, exclude)
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self.mappings.append(m)
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if not exclude:
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self.mappings.append(depot_side)
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def convert_client_path(self, clientFile):
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# chop off //client/ part to make it relative
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if not clientFile.startswith(self.client_prefix):
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die("No prefix '%s' on clientFile '%s'" %
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(self.client_prefix, clientFile))
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return clientFile[len(self.client_prefix):]
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def update_client_spec_path_cache(self, files):
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""" Caching file paths by "p4 where" batch query """
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# List depot file paths exclude that already cached
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fileArgs = [f['path'] for f in files if f['path'] not in self.client_spec_path_cache]
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if len(fileArgs) == 0:
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return # All files in cache
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where_result = p4CmdList(["-x", "-", "where"], stdin=fileArgs)
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for res in where_result:
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if "code" in res and res["code"] == "error":
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# assume error is "... file(s) not in client view"
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continue
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if "clientFile" not in res:
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die("No clientFile from 'p4 where %s'" % depot_path)
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if "unmap" in res:
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# it will list all of them, but only one not unmap-ped
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continue
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self.client_spec_path_cache[res['depotFile']] = self.convert_client_path(res["clientFile"])
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# not found files or unmap files set to ""
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for depotFile in fileArgs:
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if depotFile not in self.client_spec_path_cache:
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self.client_spec_path_cache[depotFile] = ""
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def map_in_client(self, depot_path):
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"""Return the relative location in the client where this
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depot file should live. Returns "" if the file should
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not be mapped in the client."""
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paths_filled = []
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client_path = ""
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if depot_path in self.client_spec_path_cache:
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return self.client_spec_path_cache[depot_path]
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# look at later entries first
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for m in self.mappings[::-1]:
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# see where will this path end up in the client
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p = m.map_depot_to_client(depot_path)
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if p == "":
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# Depot path does not belong in client. Must remember
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# this, as previous items should not cause files to
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# exist in this path either. Remember that the list is
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# being walked from the end, which has higher precedence.
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# Overlap mappings do not exclude previous mappings.
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if not m.overlay:
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paths_filled.append(m.client_side)
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else:
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# This mapping matched; no need to search any further.
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# But, the mapping could be rejected if the client path
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# has already been claimed by an earlier mapping (i.e.
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# one later in the list, which we are walking backwards).
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already_mapped_in_client = False
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for f in paths_filled:
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# this is View.Path.match
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if f.match(p):
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already_mapped_in_client = True
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break
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if not already_mapped_in_client:
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# Include this file, unless it is from a line that
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# explicitly said to exclude it.
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if not m.exclude:
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client_path = p
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# a match, even if rejected, always stops the search
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break
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return client_path
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die( "Error: %s is not found in client spec path" % depot_path )
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return ""
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class P4Sync(Command, P4UserMap):
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delete_actions = ( "delete", "move/delete", "purge" )
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@ -2130,6 +2018,10 @@ class P4Sync(Command, P4UserMap):
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"""Look at each depotFile in the commit to figure out to what
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branch it belongs."""
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if self.clientSpecDirs:
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files = self.extractFilesFromCommit(commit)
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self.clientSpecDirs.update_client_spec_path_cache(files)
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branches = {}
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fnum = 0
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while commit.has_key("depotFile%s" % fnum):
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@ -2379,6 +2271,9 @@ class P4Sync(Command, P4UserMap):
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else:
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sys.stderr.write("Ignoring file outside of prefix: %s\n" % f['path'])
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if self.clientSpecDirs:
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self.clientSpecDirs.update_client_spec_path_cache(files)
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self.gitStream.write("commit %s\n" % branch)
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# gitStream.write("mark :%s\n" % details["change"])
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self.committedChanges.add(int(details["change"]))
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