[Pkg-bazaar-commits] ./bzr/unstable r375: - New command touching-revisions and function to trace

[Martin Pool]

------------------------------------------------------------
revno: 375
committer: Martin Pool <mbp at sourcefrog.net>
timestamp: Thu 2005-05-05 17:43:42 +1000
message:
  - New command touching-revisions and function to trace
    changes to a given file.
modified:
  NEWS
  bzrlib/commands.py
  bzrlib/log.py
-------------- next part --------------
=== modified file 'NEWS'
--- a/NEWS	2005-05-05 06:51:01 +0000
+++ b/NEWS	2005-05-05 07:43:42 +0000
@@ -35,6 +35,8 @@
     * Expose bzrlib.open_tracefile() to start the tracefile; until
       this is called trace messages are just discarded.
 
+    * New internal function find_touching_revisions() and hidden
+      command touching-revisions trace the changes to a given file.
 
 bzr-0.0.4  2005-04-22
 

=== modified file 'bzrlib/commands.py'
--- a/bzrlib/commands.py	2005-05-05 07:00:55 +0000
+++ b/bzrlib/commands.py	2005-05-05 07:43:42 +0000
@@ -432,6 +432,19 @@
                         show_ids=show_ids)
 
 
+
+class cmd_touching_revisions(Command):
+    """Return revision-ids which affected a particular file."""
+    hidden = True
+    takes_args = ["filename"]
+    def run(self, filename):
+        b = Branch(filename, lock_mode='r')
+        inv = b.read_working_inventory()
+        file_id = inv.path2id(b.relpath(filename))
+        for revno, revision_id, what in bzrlib.log.find_touching_revisions(b, file_id):
+            print "%6d %s" % (revno, what)
+
+
 class cmd_ls(Command):
     """List files in a tree.
 

=== modified file 'bzrlib/log.py'
--- a/bzrlib/log.py	2005-05-05 07:09:06 +0000
+++ b/bzrlib/log.py	2005-05-05 07:43:42 +0000
@@ -14,6 +14,55 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+
+
+
+def find_touching_revisions(branch, file_id):
+    """Yield a description of revisions which affect the file_id.
+
+    Each returned element is (revno, revision_id, description)
+
+    This is the list of revisions where the file is either added,
+    modified, renamed or deleted.
+
+    Revisions are returned in chronological order.
+
+    TODO: Perhaps some way to limit this to only particular revisions,
+    or to traverse a non-branch set of revisions?
+    """
+    last_ie = None
+    last_path = None
+    revno = 1
+    for revision_id in branch.revision_history():
+        this_inv = branch.get_revision_inventory(revision_id)
+        if file_id in this_inv:
+            this_ie = this_inv[file_id]
+            this_path = this_inv.id2path(file_id)
+        else:
+            this_ie = this_path = None
+
+        # now we know how it was last time, and how it is in this revision.
+        # are those two states effectively the same or not?
+
+        if not this_ie and not last_ie:
+            # not present in either
+            pass
+        elif this_ie and not last_ie:
+            yield revno, revision_id, "added " + this_path
+        elif not this_ie and last_ie:
+            # deleted here
+            yield revno, revision_id, "deleted " + last_path
+        elif this_path != last_path:
+            yield revno, revision_id, ("renamed %s => %s" % (last_path, this_path))
+        elif (this_ie.text_size != last_ie.text_size
+              or this_ie.text_sha1 != last_ie.text_sha1):
+            yield revno, revision_id, "modified " + this_path
+
+        last_ie = this_ie
+        last_path = this_path
+        revno += 1
+
+
 def show_log(branch, show_timezone='original', verbose=False,
              show_ids=False,
              to_file=None):