add hg and python

1 files changed, 206 insertions, 0 deletions

diff --git a/sys/src/cmd/hg/mercurial/hgweb/protocol.py b/sys/src/cmd/hg/mercurial/hgweb/protocol.py
new file mode 100644
index 000000000..a411fdb97
--- /dev/null
+++ b/sys/src/cmd/hg/mercurial/hgweb/protocol.py
@@ -0,0 +1,206 @@
+#
+# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
+# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+import cStringIO, zlib, tempfile, errno, os, sys, urllib
+from mercurial import util, streamclone
+from mercurial.node import bin, hex
+from mercurial import changegroup as changegroupmod
+from common import ErrorResponse, HTTP_OK, HTTP_NOT_FOUND, HTTP_SERVER_ERROR
+
+# __all__ is populated with the allowed commands. Be sure to add to it if
+# you're adding a new command, or the new command won't work.
+
+__all__ = [
+   'lookup', 'heads', 'branches', 'between', 'changegroup',
+   'changegroupsubset', 'capabilities', 'unbundle', 'stream_out',
+   'branchmap',
+]
+
+HGTYPE = 'application/mercurial-0.1'
+
+def lookup(repo, req):
+    try:
+        r = hex(repo.lookup(req.form['key'][0]))
+        success = 1
+    except Exception, inst:
+        r = str(inst)
+        success = 0
+    resp = "%s %s\n" % (success, r)
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
+def heads(repo, req):
+    resp = " ".join(map(hex, repo.heads())) + "\n"
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
+def branchmap(repo, req):
+    branches = repo.branchmap()
+    heads = []
+    for branch, nodes in branches.iteritems():
+        branchname = urllib.quote(branch)
+        branchnodes = [hex(node) for node in nodes]
+        heads.append('%s %s' % (branchname, ' '.join(branchnodes)))
+    resp = '\n'.join(heads)
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
+def branches(repo, req):
+    nodes = []
+    if 'nodes' in req.form:
+        nodes = map(bin, req.form['nodes'][0].split(" "))
+    resp = cStringIO.StringIO()
+    for b in repo.branches(nodes):
+        resp.write(" ".join(map(hex, b)) + "\n")
+    resp = resp.getvalue()
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
+def between(repo, req):
+    if 'pairs' in req.form:
+        pairs = [map(bin, p.split("-"))
+                 for p in req.form['pairs'][0].split(" ")]
+    resp = cStringIO.StringIO()
+    for b in repo.between(pairs):
+        resp.write(" ".join(map(hex, b)) + "\n")
+    resp = resp.getvalue()
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
+def changegroup(repo, req):
+    req.respond(HTTP_OK, HGTYPE)
+    nodes = []
+
+    if 'roots' in req.form:
+        nodes = map(bin, req.form['roots'][0].split(" "))
+
+    z = zlib.compressobj()
+    f = repo.changegroup(nodes, 'serve')
+    while 1:
+        chunk = f.read(4096)
+        if not chunk:
+            break
+        yield z.compress(chunk)
+
+    yield z.flush()
+
+def changegroupsubset(repo, req):
+    req.respond(HTTP_OK, HGTYPE)
+    bases = []
+    heads = []
+
+    if 'bases' in req.form:
+        bases = [bin(x) for x in req.form['bases'][0].split(' ')]
+    if 'heads' in req.form:
+        heads = [bin(x) for x in req.form['heads'][0].split(' ')]
+
+    z = zlib.compressobj()
+    f = repo.changegroupsubset(bases, heads, 'serve')
+    while 1:
+        chunk = f.read(4096)
+        if not chunk:
+            break
+        yield z.compress(chunk)
+
+    yield z.flush()
+
+def capabilities(repo, req):
+    caps = ['lookup', 'changegroupsubset', 'branchmap']
+    if repo.ui.configbool('server', 'uncompressed', untrusted=True):
+        caps.append('stream=%d' % repo.changelog.version)
+    if changegroupmod.bundlepriority:
+        caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority))
+    rsp = ' '.join(caps)
+    req.respond(HTTP_OK, HGTYPE, length=len(rsp))
+    yield rsp
+
+def unbundle(repo, req):
+
+    proto = req.env.get('wsgi.url_scheme') or 'http'
+    their_heads = req.form['heads'][0].split(' ')
+
+    def check_heads():
+        heads = map(hex, repo.heads())
+        return their_heads == [hex('force')] or their_heads == heads
+
+    # fail early if possible
+    if not check_heads():
+        req.drain()
+        raise ErrorResponse(HTTP_OK, 'unsynced changes')
+
+    # do not lock repo until all changegroup data is
+    # streamed. save to temporary file.
+
+    fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-')
+    fp = os.fdopen(fd, 'wb+')
+    try:
+        length = int(req.env['CONTENT_LENGTH'])
+        for s in util.filechunkiter(req, limit=length):
+            fp.write(s)
+
+        try:
+            lock = repo.lock()
+            try:
+                if not check_heads():
+                    raise ErrorResponse(HTTP_OK, 'unsynced changes')
+
+                fp.seek(0)
+                header = fp.read(6)
+                if header.startswith('HG') and not header.startswith('HG10'):
+                    raise ValueError('unknown bundle version')
+                elif header not in changegroupmod.bundletypes:
+                    raise ValueError('unknown bundle compression type')
+                gen = changegroupmod.unbundle(header, fp)
+
+                # send addchangegroup output to client
+
+                oldio = sys.stdout, sys.stderr
+                sys.stderr = sys.stdout = cStringIO.StringIO()
+
+                try:
+                    url = 'remote:%s:%s:%s' % (
+                          proto,
+                          urllib.quote(req.env.get('REMOTE_HOST', '')),
+                          urllib.quote(req.env.get('REMOTE_USER', '')))
+                    try:
+                        ret = repo.addchangegroup(gen, 'serve', url)
+                    except util.Abort, inst:
+                        sys.stdout.write("abort: %s\n" % inst)
+                        ret = 0
+                finally:
+                    val = sys.stdout.getvalue()
+                    sys.stdout, sys.stderr = oldio
+                req.respond(HTTP_OK, HGTYPE)
+                return '%d\n%s' % (ret, val),
+            finally:
+                lock.release()
+        except ValueError, inst:
+            raise ErrorResponse(HTTP_OK, inst)
+        except (OSError, IOError), inst:
+            filename = getattr(inst, 'filename', '')
+            # Don't send our filesystem layout to the client
+            if filename.startswith(repo.root):
+                filename = filename[len(repo.root)+1:]
+            else:
+                filename = ''
+            error = getattr(inst, 'strerror', 'Unknown error')
+            if inst.errno == errno.ENOENT:
+                code = HTTP_NOT_FOUND
+            else:
+                code = HTTP_SERVER_ERROR
+            raise ErrorResponse(code, '%s: %s' % (error, filename))
+    finally:
+        fp.close()
+        os.unlink(tempname)
+
+def stream_out(repo, req):
+    req.respond(HTTP_OK, HGTYPE)
+    try:
+        for chunk in streamclone.stream_out(repo, untrusted=True):
+            yield chunk
+    except streamclone.StreamException, inst:
+        yield str(inst)