hgweb: watch changelog for changes

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

hgweb: watch changelog for changes

Check the mtime of the changelog for updates on each invocation of
run(). For the standalone server, this means you don't need to re-run
it to pick up changes.

manifest hash: 398bdbf03b867df27da9e803a094dd265f62e12c
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Version: GnuPG v1.4.0 (GNU/Linux)

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=pTp6
-----END PGP SIGNATURE-----

mercurial/hgweb.py

@@ -1,711 +1,718 b''
 # hgweb.py - web interface to a mercurial repository
 #
 # Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
 # Copyright 2005 Matt Mackall <[e-mail]> 
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 # useful for debugging
 import cgitb
 cgitb.enable()
 
 import os, cgi, time, re, difflib, sys, zlib
 from mercurial.hg import *
 from mercurial.ui import *
 
 def templatepath():
     for f in "templates", "../templates":
         p = os.path.join(os.path.dirname(__file__), f)
         if os.path.isdir(p): return p
 
 def age(t):
     def plural(t, c):
         if c == 1: return t
         return t + "s"
     def fmt(t, c):
         return "%d %s" % (c, plural(t, c))
 
     now = time.time()
     delta = max(1, int(now - t))
 
     scales = [["second", 1],
               ["minute", 60],
               ["hour", 3600],
               ["day", 3600 * 24],
               ["week", 3600 * 24 * 7],
               ["month", 3600 * 24 * 30],
               ["year", 3600 * 24 * 365]]
 
     scales.reverse()
 
     for t, s in scales:
         n = delta / s
         if n >= 2 or s == 1: return fmt(t, n)
 
 def nl2br(text):
     return text.replace('\n', '<br/>\n')
 
 def obfuscate(text):
     return ''.join([ '&#%d' % ord(c) for c in text ])
 
 def up(p):
     if p[0] != "/": p = "/" + p
     if p[-1] == "/": p = p[:-1]
     up = os.path.dirname(p)
     if up == "/":
         return "/"
     return up + "/"
 
 def httphdr(type):
     print 'Content-type: %s\n' % type
 
 def write(*things):
     for thing in things:
         if hasattr(thing, "__iter__"):
             for part in thing:
                 write(part)
         else:
             sys.stdout.write(str(thing))
 
 def template(tmpl, filters = {}, **map):
     while tmpl:
         m = re.search(r"#([a-zA-Z0-9]+)((\|[a-zA-Z0-9]+)*)#", tmpl)
         if m:
             yield tmpl[:m.start(0)]
             v = map.get(m.group(1), "")
             v = callable(v) and v() or v
 
             fl = m.group(2)
             if fl:
                 for f in fl.split("|")[1:]:
                     v = filters[f](v)
                 
             yield v
             tmpl = tmpl[m.end(0):]
         else:
             yield tmpl
             return
 
 class templater:
     def __init__(self, mapfile, filters = {}):
         self.cache = {}
         self.map = {}
         self.base = os.path.dirname(mapfile)
         self.filters = filters
         
         for l in file(mapfile):
             m = re.match(r'(\S+)\s*=\s*"(.*)"$', l)
             if m:
                 self.cache[m.group(1)] = m.group(2)
             else:
                 m = re.match(r'(\S+)\s*=\s*(\S+)', l)
                 if m:
                     self.map[m.group(1)] = os.path.join(self.base, m.group(2))
                 else:
                     raise "unknown map entry '%s'"  % l
 
     def __call__(self, t, **map):
         try:
             tmpl = self.cache[t]
         except KeyError:
             tmpl = self.cache[t] = file(self.map[t]).read()
         return template(tmpl, self.filters, **map)
         
 class hgweb:
     maxchanges = 20
     maxfiles = 10
 
     def __init__(self, path, name, templates = ""):
         self.templates = templates or templatepath()
         self.reponame = name
-        self.repo = repository(ui(), path)
+        self.path = path
+        self.mtime = -1
         self.viewonly = 0
 
         self.filters = {
             "escape": cgi.escape,
             "age": age,
             "date": (lambda x: time.asctime(time.gmtime(x))),
             "addbreaks": nl2br,
             "obfuscate": obfuscate,
             "firstline": (lambda x: x.splitlines(1)[0]),
             }
 
+    def refresh(self):
+        s = os.stat(os.path.join(self.path, ".hg", "00changelog.i"))
+        if s.st_mtime != self.mtime:
+            self.repo = repository(ui(), self.path)
+
     def date(self, cs):
         return time.asctime(time.gmtime(float(cs[2].split(' ')[0])))
 
     def listfiles(self, files, mf):
         for f in files[:self.maxfiles]:
             yield self.t("filenodelink", node = hex(mf[f]), file = f)
         if len(files) > self.maxfiles:
             yield self.t("fileellipses")
 
     def listfilediffs(self, files, changeset):
         for f in files[:self.maxfiles]:
             yield self.t("filedifflink", node = hex(changeset), file = f)
         if len(files) > self.maxfiles:
             yield self.t("fileellipses")
 
     def parent(self, t1, node=nullid, rev=-1, **args):
         if node != hex(nullid):
             yield self.t(t1, node = node, rev = rev, **args)
 
     def diff(self, node1, node2, files):
         def filterfiles(list, files):
             l = [ x for x in list if x in files ]
             
             for f in files:
                 if f[-1] != os.sep: f += os.sep
                 l += [ x for x in list if x.startswith(f) ]
             return l
 
         parity = [0]
         def diffblock(diff, f, fn):
             yield self.t("diffblock",
                          lines = prettyprintlines(diff),
                          parity = parity[0],
                          file = f,
                          filenode = hex(fn))
             parity[0] = 1 - parity[0]
             
         def prettyprintlines(diff):
             for l in diff.splitlines(1):
                 if l.startswith('+'):
                     yield self.t("difflineplus", line = l)
                 elif l.startswith('-'):
                     yield self.t("difflineminus", line = l)
                 elif l.startswith('@'):
                     yield self.t("difflineat", line = l)
                 else:
                     yield self.t("diffline", line = l)
 
         r = self.repo
         cl = r.changelog
         mf = r.manifest
         change1 = cl.read(node1)
         change2 = cl.read(node2)
         mmap1 = mf.read(change1[0])
         mmap2 = mf.read(change2[0])
         date1 = self.date(change1)
         date2 = self.date(change2)
 
         c, a, d = r.diffrevs(node1, node2)
         c, a, d = map(lambda x: filterfiles(x, files), (c, a, d))
 
         for f in c:
             to = r.file(f).read(mmap1[f])
             tn = r.file(f).read(mmap2[f])
             yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)
         for f in a:
             to = ""
             tn = r.file(f).read(mmap2[f])
             yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)
         for f in d:
             to = r.file(f).read(mmap1[f])
             tn = ""
             yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)
 
     def header(self):
         yield self.t("header", repo = self.reponame)
 
     def footer(self):
         yield self.t("footer", repo = self.reponame)
 
     def changelog(self, pos):
         def changenav():
             def seq(factor = 1):
                 yield 1 * factor
                 yield 3 * factor
                 #yield 5 * factor
                 for f in seq(factor * 10):
                     yield f
 
             l = []
             for f in seq():
                 if f < self.maxchanges / 2: continue
                 if f > count: break
                 r = "%d" % f
                 if pos + f < count - (f/2): l.append(("+" + r, pos + f))
                 if pos - f >= 0 + (f/2): l.insert(0, ("-" + r, pos - f))
 
             yield self.t("naventry", rev = 0, label="(0)")
                     
             for label, rev in l:
                 yield self.t("naventry", label = label, rev = rev)
 
             yield self.t("naventry", label="tip")
 
         def changelist():
             parity = (start - end) & 1
             cl = self.repo.changelog
             l = [] # build a list in forward order for efficiency
             for i in range(start, end + 1):
                 n = cl.node(i)
                 changes = cl.read(n)
                 hn = hex(n)
                 p1, p2 = cl.parents(n)
                 t = float(changes[2].split(' ')[0])
 
                 l.insert(0, self.t(
                     'changelogentry',
                     parity = parity,
                     author = changes[1],
                     parent1 = self.parent("changelogparent",
                                           hex(p1), cl.rev(p1)),
                     parent2 = self.parent("changelogparent",
                                           hex(p2), cl.rev(p2)),
                     p1 = hex(p1), p2 = hex(p2),
                     p1rev = cl.rev(p1), p2rev = cl.rev(p2),
                     manifest = hex(changes[0]),
                     desc = changes[4],
                     date = t,
                     files = self.listfilediffs(changes[3], n),
                     rev = i,
                     node = hn))
                 parity = 1 - parity
 
             yield l
 
         cl = self.repo.changelog
         mf = cl.read(cl.tip())[0]
         count = cl.count()
         end = min(pos, count - 1)
         start = max(0, pos - self.maxchanges)
         end = min(count - 1, start + self.maxchanges)
 
         yield self.t('changelog',
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      changenav = changenav,
                      manifest = hex(mf),
                      rev = pos, changesets = count, entries = changelist)
 
     def changeset(self, nodeid):
         n = bin(nodeid)
         cl = self.repo.changelog
         changes = cl.read(n)
         p1, p2 = cl.parents(n)
         p1rev, p2rev = cl.rev(p1), cl.rev(p2)
         t = float(changes[2].split(' ')[0])
         
         files = []
         mf = self.repo.manifest.read(changes[0])
         for f in changes[3]:
             files.append(self.t("filenodelink",
                                 filenode = hex(mf[f]), file = f))
 
         def diff():
             yield self.diff(p1, n, changes[3])
 
         yield self.t('changeset',
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      diff = diff,
                      rev = cl.rev(n),
                      node = nodeid,
                      parent1 = self.parent("changesetparent",
                                            hex(p1), cl.rev(p1)),
                      parent2 = self.parent("changesetparent",
                                            hex(p2), cl.rev(p2)),
                      p1 = hex(p1), p2 = hex(p2),
                      p1rev = cl.rev(p1), p2rev = cl.rev(p2),
                      manifest = hex(changes[0]),
                      author = changes[1],
                      desc = changes[4],
                      date = t,
                      files = files)
 
     def filelog(self, f, filenode):
         cl = self.repo.changelog
         fl = self.repo.file(f)
         count = fl.count()
 
         def entries():
             l = []
             parity = (count - 1) & 1
             
             for i in range(count):
 
                 n = fl.node(i)
                 lr = fl.linkrev(n)
                 cn = cl.node(lr)
                 cs = cl.read(cl.node(lr))
                 p1, p2 = fl.parents(n)
                 t = float(cs[2].split(' ')[0])
 
                 l.insert(0, self.t("filelogentry",
                                    parity = parity,
                                    filenode = hex(n),
                                    filerev = i,
                                    file = f,
                                    node = hex(cn),
                                    author = cs[1],
                                    date = t,
                                    desc = cs[4],
                                    p1 = hex(p1), p2 = hex(p2),
                                    p1rev = fl.rev(p1), p2rev = fl.rev(p2)))
                 parity = 1 - parity
 
             yield l
 
         yield self.t("filelog",
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      file = f,
                      filenode = filenode,
                      entries = entries)
 
     def filerevision(self, f, node):
         fl = self.repo.file(f)
         n = bin(node)
         text = fl.read(n)
         changerev = fl.linkrev(n)
         cl = self.repo.changelog
         cn = cl.node(changerev)
         cs = cl.read(cn)
         p1, p2 = fl.parents(n)
         t = float(cs[2].split(' ')[0])
         mfn = cs[0]
 
         def lines():
             for l, t in enumerate(text.splitlines(1)):
                 yield self.t("fileline", line = t,
                              linenumber = "% 6d" % (l + 1),
                              parity = l & 1)
         
         yield self.t("filerevision", file = f,
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      filenode = node,
                      path = up(f),
                      text = lines(),
                      rev = changerev,
                      node = hex(cn),
                      manifest = hex(mfn),
                      author = cs[1],
                      date = t,
                      parent1 = self.parent("filerevparent",
                                            hex(p1), fl.rev(p1), file=f),
                      parent2 = self.parent("filerevparent",
                                            hex(p2), fl.rev(p2), file=f),
                      p1 = hex(p1), p2 = hex(p2),
                      p1rev = fl.rev(p1), p2rev = fl.rev(p2))
 
     def fileannotate(self, f, node):
         bcache = {}
         ncache = {}
         fl = self.repo.file(f)
         n = bin(node)
         changerev = fl.linkrev(n)
 
         cl = self.repo.changelog
         cn = cl.node(changerev)
         cs = cl.read(cn)
         p1, p2 = fl.parents(n)
         t = float(cs[2].split(' ')[0])
         mfn = cs[0]
 
         def annotate():
             parity = 1
             last = None
             for r, l in fl.annotate(n):
                 try:
                     cnode = ncache[r]
                 except KeyError:
                     cnode = ncache[r] = self.repo.changelog.node(r)
                     
                 try:
                     name = bcache[r]
                 except KeyError:
                     cl = self.repo.changelog.read(cnode)
                     name = cl[1]
                     f = name.find('@')
                     if f >= 0:
                         name = name[:f]
                     bcache[r] = name
 
                 if last != cnode:
                     parity = 1 - parity
                     last = cnode
 
                 yield self.t("annotateline",
                              parity = parity,
                              node = hex(cnode),
                              rev = r,
                              author = name,
                              file = f,
                              line = l)
 
         yield self.t("fileannotate",
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      file = f,
                      filenode = node,
                      annotate = annotate,
                      path = up(f),
                      rev = changerev,
                      node = hex(cn),
                      manifest = hex(mfn),
                      author = cs[1],
                      date = t,
                      parent1 = self.parent("fileannotateparent",
                                            hex(p1), fl.rev(p1), file=f),
                      parent2 = self.parent("fileannotateparent",
                                            hex(p2), fl.rev(p2), file=f),
                      p1 = hex(p1), p2 = hex(p2),
                      p1rev = fl.rev(p1), p2rev = fl.rev(p2))
 
     def manifest(self, mnode, path):
         mf = self.repo.manifest.read(bin(mnode))
         rev = self.repo.manifest.rev(bin(mnode))
         node = self.repo.changelog.node(rev)
 
         files = {}
  
         p = path[1:]
         l = len(p)
 
         for f,n in mf.items():
             if f[:l] != p:
                 continue
             remain = f[l:]
             if "/" in remain:
                 short = remain[:remain.find("/") + 1] # bleah
                 files[short] = (f, None)
             else:
                 short = os.path.basename(remain)
                 files[short] = (f, n)
 
         def filelist():
             parity = 0
             fl = files.keys()
             fl.sort()
             for f in fl:
                 full, fnode = files[f]
                 if fnode:
                     yield self.t("manifestfileentry",
                                  file = full,
                                  manifest = mnode,
                                  filenode = hex(fnode),
                                  parity = parity,
                                  basename = f)
                 else:
                     yield self.t("manifestdirentry",
                                  parity = parity,
                                  path = os.path.join(path, f),
                                  manifest = mnode, basename = f[:-1])
                 parity = 1 - parity
 
         yield self.t("manifest",
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      manifest = mnode,
                      rev = rev,
                      node = hex(node),
                      path = path,
                      up = up(path),
                      entries = filelist)
 
     def tags(self):
         cl = self.repo.changelog
         mf = cl.read(cl.tip())[0]
 
         self.repo.lookup(0) # prime the cache
         i = self.repo.tags.items()
         n = [ (cl.rev(e[1]), e) for e in i ] # sort by revision
         n.sort()
         n.reverse()
         i = [ e[1] for e in n ]
 
         def entries():
             parity = 0
             for k,n in i:
                 yield self.t("tagentry",
                              parity = parity,
                              tag = k,
                              node = hex(n))
                 parity = 1 - parity
 
         yield self.t("tags",
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      manifest = hex(mf),
                      entries = entries)
 
     def filediff(self, file, changeset):
         n = bin(changeset)
         cl = self.repo.changelog
         p1 = cl.parents(n)[0]
         cs = cl.read(n)
         mf = self.repo.manifest.read(cs[0])
         
         def diff():
             yield self.diff(p1, n, file)
 
         yield self.t("filediff",
                      header = self.header(),
                      footer = self.footer(),
                      repo = self.reponame,
                      file = file,
                      filenode = hex(mf[file]),
                      node = changeset,
                      rev = self.repo.changelog.rev(n),
                      p1 = hex(p1),
                      p1rev = self.repo.changelog.rev(p1),
                      diff = diff)
                      
     # add tags to things
     # tags -> list of changesets corresponding to tags
     # find tag, changeset, file
 
     def run(self):
+        self.refresh()
         args = cgi.parse()
 
         m = os.path.join(self.templates, "map")
         if args.has_key('style'):
             b = os.path.basename("map-" + args['style'][0])
             p = os.path.join(self.templates, b)
             if os.path.isfile(p): m = p
             
         self.t = templater(m, self.filters)
 
         if not args.has_key('cmd') or args['cmd'][0] == 'changelog':
             hi = self.repo.changelog.count()
             if args.has_key('rev'):
                 hi = args['rev'][0]
                 try:
                     hi = self.repo.changelog.rev(self.repo.lookup(hi))
                 except KeyError:
                     hi = self.repo.changelog.count()
 
             write(self.changelog(hi))
             
         elif args['cmd'][0] == 'changeset':
             write(self.changeset(args['node'][0]))
 
         elif args['cmd'][0] == 'manifest':
             write(self.manifest(args['manifest'][0], args['path'][0]))
 
         elif args['cmd'][0] == 'tags':
             write(self.tags())
 
         elif args['cmd'][0] == 'filediff':
             write(self.filediff(args['file'][0], args['node'][0]))
 
         elif args['cmd'][0] == 'file':
             write(self.filerevision(args['file'][0], args['filenode'][0]))
 
         elif args['cmd'][0] == 'annotate':
             write(self.fileannotate(args['file'][0], args['filenode'][0]))
 
         elif args['cmd'][0] == 'filelog':
             write(self.filelog(args['file'][0], args['filenode'][0]))
 
         elif args['cmd'][0] == 'heads':
             httphdr("text/plain")
             h = self.repo.heads()
             sys.stdout.write(" ".join(map(hex, h)) + "\n")
 
         elif args['cmd'][0] == 'branches':
             httphdr("text/plain")
             nodes = []
             if args.has_key('nodes'):
                 nodes = map(bin, args['nodes'][0].split(" "))
             for b in self.repo.branches(nodes):
                 sys.stdout.write(" ".join(map(hex, b)) + "\n")
 
         elif args['cmd'][0] == 'between':
             httphdr("text/plain")
             nodes = []
             if args.has_key('pairs'):
                 pairs = [ map(bin, p.split("-"))
                           for p in args['pairs'][0].split(" ") ]
             for b in self.repo.between(pairs):
                 sys.stdout.write(" ".join(map(hex, b)) + "\n")
 
         elif args['cmd'][0] == 'changegroup':
             httphdr("application/hg-changegroup")
             nodes = []
             if self.viewonly:
                 return
 
             if args.has_key('roots'):
                 nodes = map(bin, args['roots'][0].split(" "))
 
             z = zlib.compressobj()
             for chunk in self.repo.changegroup(nodes):
                 sys.stdout.write(z.compress(chunk))
 
             sys.stdout.write(z.flush())
 
         else:
             write(self.t("error"))
 
 def server(path, name, templates, address, port):
 
     import BaseHTTPServer
     import sys, os
 
     class hgwebhandler(BaseHTTPServer.BaseHTTPRequestHandler):
         def do_POST(self):
             self.do_hgweb()
 
         def do_GET(self):
             self.do_hgweb()
 
         def do_hgweb(self):
             query = ""
             p = self.path.find("?")
             if p:
                 query = self.path[p + 1:]
                 query = query.replace('+', ' ')
         
             env = {}
             env['GATEWAY_INTERFACE'] = 'CGI/1.1'
             env['REQUEST_METHOD'] = self.command
             if query:
                 env['QUERY_STRING'] = query
             host = self.address_string()
             if host != self.client_address[0]:
                 env['REMOTE_HOST'] = host
                 env['REMOTE_ADDR'] = self.client_address[0]
 
             if self.headers.typeheader is None:
                 env['CONTENT_TYPE'] = self.headers.type
             else:
                 env['CONTENT_TYPE'] = self.headers.typeheader
             length = self.headers.getheader('content-length')
             if length:
                 env['CONTENT_LENGTH'] = length
             accept = []
             for line in self.headers.getallmatchingheaders('accept'):
                 if line[:1] in "\t\n\r ":
                     accept.append(line.strip())
                 else:
                     accept = accept + line[7:].split(',')
             env['HTTP_ACCEPT'] = ','.join(accept)
 
             os.environ.update(env)
 
             save = sys.argv, sys.stdin, sys.stdout, sys.stderr
             try:
                 sys.stdin = self.rfile
                 sys.stdout = self.wfile
                 sys.argv = ["hgweb.py"]
                 if '=' not in query:
                     sys.argv.append(query)
                 self.send_response(200, "Script output follows")
                 hg.run()
             finally:
                 sys.argv, sys.stdin, sys.stdout, sys.stderr = save
 
     hg = hgweb(path, name, templates)
     httpd = BaseHTTPServer.HTTPServer((address, port), hgwebhandler)
     httpd.serve_forever()