view mercurial/hgweb/webutil.py @ 6945:2cfdabe235fb

hgweb: return content iterator instead of using write() callable

This is a new version of 4879468fa28f (which was backed out in 943f066c0d58),
with an extra line removed to fix problems with hg serve. hg's internal web
server contains checking if the app isn't trying to write more bytes than
specified by the Content-Length header. The first try still contained an old
line that wrote the response, so the response was sent twice.

# hgweb/webutil.py - utility library for the web interface.
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
# Copyright 2005-2007 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.

import os
from mercurial.node import hex, nullid
from mercurial.repo import RepoError
from mercurial import util

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 revnavgen(pos, pagelen, limit, nodefunc):
    def seq(factor, limit=None):
        if limit:
            yield limit
            if limit >= 20 and limit <= 40:
                yield 50
        else:
            yield 1 * factor
            yield 3 * factor
        for f in seq(factor * 10):
            yield f

    def nav(**map):
        l = []
        last = 0
        for f in seq(1, pagelen):
            if f < pagelen or f <= last:
                continue
            if f > limit:
                break
            last = f
            if pos + f < limit:
                l.append(("+%d" % f, hex(nodefunc(pos + f).node())))
            if pos - f >= 0:
                l.insert(0, ("-%d" % f, hex(nodefunc(pos - f).node())))

        try:
            yield {"label": "(0)", "node": hex(nodefunc('0').node())}

            for label, node in l:
                yield {"label": label, "node": node}

            yield {"label": "tip", "node": "tip"}
        except RepoError:
            pass

    return nav

def siblings(siblings=[], hiderev=None, **args):
    siblings = [s for s in siblings if s.node() != nullid]
    if len(siblings) == 1 and siblings[0].rev() == hiderev:
        return
    for s in siblings:
        d = {'node': hex(s.node()), 'rev': s.rev()}
        if hasattr(s, 'path'):
            d['file'] = s.path()
        d.update(args)
        yield d

def renamelink(fctx):
    r = fctx.renamed()
    if r:
        return [dict(file=r[0], node=hex(r[1]))]
    return []

def nodetagsdict(repo, node):
    return [{"name": i} for i in repo.nodetags(node)]

def nodebranchdict(repo, ctx):
    branches = []
    branch = ctx.branch()
    # If this is an empty repo, ctx.node() == nullid,
    # ctx.branch() == 'default', but branchtags() is
    # an empty dict. Using dict.get avoids a traceback.
    if repo.branchtags().get(branch) == ctx.node():
        branches.append({"name": branch})
    return branches

def nodeinbranch(repo, ctx):
    branches = []
    branch = ctx.branch()
    if branch != 'default' and repo.branchtags().get(branch) != ctx.node():
        branches.append({"name": branch})
    return branches

def nodebranchnodefault(ctx):
    branches = []
    branch = ctx.branch()
    if branch != 'default':
        branches.append({"name": branch})
    return branches

def showtag(repo, tmpl, t1, node=nullid, **args):
    for t in repo.nodetags(node):
        yield tmpl(t1, tag=t, **args)

def cleanpath(repo, path):
    path = path.lstrip('/')
    return util.canonpath(repo.root, '', path)

def changectx(repo, req):
    changeid = "tip"
    if 'node' in req.form:
        changeid = req.form['node'][0]
    elif 'manifest' in req.form:
        changeid = req.form['manifest'][0]

    try:
        ctx = repo[changeid]
    except RepoError:
        man = repo.manifest
        ctx = repo[man.linkrev(man.lookup(changeid))]

    return ctx

def filectx(repo, req):
    path = cleanpath(repo, req.form['file'][0])
    if 'node' in req.form:
        changeid = req.form['node'][0]
    else:
        changeid = req.form['filenode'][0]
    try:
        fctx = repo[changeid][path]
    except RepoError:
        fctx = repo.filectx(path, fileid=changeid)

    return fctx