# commands.py - command processing for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

import os, re, sys, signal
import fancyopts, ui, hg
from demandload import *
demandload(globals(), "mdiff time hgweb traceback")

class UnknownCommand(Exception): pass

def filterfiles(filters, files):
    l = [ x for x in files if x in filters ]

    for t in filters:
        if t and t[-1] != os.sep: t += os.sep
        l += [ x for x in files if x.startswith(t) ]
    return l

def relfilter(repo, files):
    if os.getcwd() != repo.root:
        p = os.getcwd()[len(repo.root) + 1: ]
        return filterfiles(p, files)
    return files

def relpath(repo, args):
    if os.getcwd() != repo.root:
        p = os.getcwd()[len(repo.root) + 1: ]
        return [ os.path.normpath(os.path.join(p, x)) for x in args ]
    return args

def dodiff(repo, files = None, node1 = None, node2 = None):
    def date(c):
        return time.asctime(time.gmtime(float(c[2].split(' ')[0])))

    if node2:
        change = repo.changelog.read(node2)
        mmap2 = repo.manifest.read(change[0])
        (c, a, d) = repo.diffrevs(node1, node2)
        def read(f): return repo.file(f).read(mmap2[f])
        date2 = date(change)
    else:
        date2 = time.asctime()
        (c, a, d, u) = repo.diffdir(repo.root, node1)
        if not node1:
            node1 = repo.dirstate.parents()[0]
        def read(f): return file(os.path.join(repo.root, f)).read()

    change = repo.changelog.read(node1)
    mmap = repo.manifest.read(change[0])
    date1 = date(change)

    if files:
        c, a, d = map(lambda x: filterfiles(files, x), (c, a, d))

    for f in c:
        to = None
        if f in mmap:
            to = repo.file(f).read(mmap[f])
        tn = read(f)
        sys.stdout.write(mdiff.unidiff(to, date1, tn, date2, f))
    for f in a:
        to = None
        tn = read(f)
        sys.stdout.write(mdiff.unidiff(to, date1, tn, date2, f))
    for f in d:
        to = repo.file(f).read(mmap[f])
        tn = None
        sys.stdout.write(mdiff.unidiff(to, date1, tn, date2, f))
    
def help(ui, cmd=None):
    '''show help for a given command or all commands'''
    if cmd:
        try:
            i = find(cmd)
            ui.write("%s\n\n" % i[2])
            ui.write(i[0].__doc__, "\n")
        except UnknownCommand:
            ui.warn("hg: unknown command %s\n" % cmd)
        sys.exit(0)
    else:
        ui.status('hg commands:\n\n')

        h = {}
        for e in table.values():
            f = e[0]
            if f.__name__.startswith("debug"): continue
            d = ""
            if f.__doc__:
                d = f.__doc__.splitlines(0)[0].rstrip()
            h[f.__name__] = d

        fns = h.keys()
        fns.sort()
        m = max(map(len, fns))
        for f in fns:
            ui.status(' %-*s   %s\n' % (m, f, h[f]))

# Commands start here, listed alphabetically

def add(ui, repo, file, *files):
    '''add the specified files on the next commit'''
    repo.add(relpath(repo, (file,) + files))

def addremove(ui, repo):
    """add all new files, delete all missing files"""
    (c, a, d, u) = repo.diffdir(repo.root)
    repo.add(u)
    repo.remove(d)

def annotate(u, repo, file, *files, **ops):
    """show changeset information per file line"""
    def getnode(rev):
        return hg.short(repo.changelog.node(rev))

    def getname(rev):
        try:
            return bcache[rev]
        except KeyError:
            cl = repo.changelog.read(repo.changelog.node(rev))
            name = cl[1]
            f = name.find('@')
            if f >= 0:
                name = name[:f]
            bcache[rev] = name
            return name
    
    bcache = {}
    opmap = [['user', getname], ['number', str], ['changeset', getnode]]
    if not ops['user'] and not ops['changeset']:
        ops['number'] = 1

    node = repo.dirstate.parents()[0]
    if ops['revision']:
        node = repo.changelog.lookup(ops['revision'])
    change = repo.changelog.read(node)
    mmap = repo.manifest.read(change[0])
    maxuserlen = 0
    maxchangelen = 0
    for f in relpath(repo, (file,) + files):
        lines = repo.file(f).annotate(mmap[f])
        pieces = []

        for o, f in opmap:
            if ops[o]:
                l = [ f(n) for n,t in lines ]
                m = max(map(len, l))
                pieces.append([ "%*s" % (m, x) for x in l])

        for p,l in zip(zip(*pieces), lines):
            u.write(" ".join(p) + ": " + l[1])

def branch(ui, path):
    '''branch from a local repository'''
    # this should eventually support remote repos
    os.system("cp -al %s/.hg .hg" % path)

def cat(ui, repo, file, rev = []):
    """output the latest or given revision of a file"""
    r = repo.file(file)
    n = r.tip()
    if rev: n = r.lookup(rev)
    sys.stdout.write(r.read(n))

def commit(ui, repo, *files):
    """commit the specified files or all outstanding changes"""
    repo.commit(relpath(repo, files))

def debugaddchangegroup(ui, repo):
    data = sys.stdin.read()
    repo.addchangegroup(data)

def debugchangegroup(ui, repo, roots):
    newer = repo.newer(map(repo.lookup, roots))
    for chunk in repo.changegroup(newer):
        sys.stdout.write(chunk)

def debugindex(ui, file):
    r = hg.revlog(open, file, "")
    print "   rev    offset  length   base linkrev"+\
          " p1           p2           nodeid"
    for i in range(r.count()):
        e = r.index[i]
        print "% 6d % 9d % 7d % 6d % 7d %s.. %s.. %s.." % (
            i, e[0], e[1], e[2], e[3],
            hg.hex(e[4][:5]), hg.hex(e[5][:5]), hg.hex(e[6][:5]))

def debugindexdot(ui, file):
    r = hg.revlog(open, file, "")
    print "digraph G {"
    for i in range(r.count()):
        e = r.index[i]
        print "\t%d -> %d" % (r.rev(e[4]), i)
        if e[5] != hg.nullid:
            print "\t%d -> %d" % (r.rev(e[5]), i)
    print "}"

def diff(ui, repo, *files, **opts):
    """diff working directory (or selected files)"""
    revs = []
    if opts['rev']:
        revs = map(lambda x: repo.lookup(x), opts['rev'])
    
    if len(revs) > 2:
        self.ui.warn("too many revisions to diff\n")
        sys.exit(1)

    if files:
        files = relpath(repo, files)
    else:
        files = relpath(repo, [""])

    dodiff(repo, files, *revs)

def export(ui, repo, changeset):
    """dump the changeset header and diffs for a revision"""
    node = repo.lookup(changeset)
    prev, other = repo.changelog.parents(node)
    change = repo.changelog.read(node)
    print "# HG changeset patch"
    print "# User %s" % change[1]
    print "# Node ID %s" % hg.hex(node)
    print "# Parent  %s" % hg.hex(prev)
    print
    if other != hg.nullid:
        print "# Parent  %s" % hg.hex(other)
    print change[4].rstrip()
    print
    
    dodiff(repo, None, prev, node)

def forget(ui, repo, file, *files):
    """don't add the specified files on the next commit"""
    repo.forget(relpath(repo, (file,) + files))

def heads(ui, repo):
    '''show current repository heads'''
    for n in repo.changelog.heads():
        i = repo.changelog.rev(n)
        changes = repo.changelog.read(n)
        (p1, p2) = repo.changelog.parents(n)
        (h, h1, h2) = map(hg.hex, (n, p1, p2))
        (i1, i2) = map(repo.changelog.rev, (p1, p2))
        print "rev:      %4d:%s" % (i, h)
        print "parents:  %4d:%s" % (i1, h1)
        if i2: print "          %4d:%s" % (i2, h2)
        print "manifest: %4d:%s" % (repo.manifest.rev(changes[0]),
                                    hg.hex(changes[0]))
        print "user:", changes[1]
        print "date:", time.asctime(
            time.localtime(float(changes[2].split(' ')[0])))
        if ui.verbose: print "files:", " ".join(changes[3])
        print "description:"
        print changes[4]

def history(ui, repo):
    """show the changelog history"""
    for i in range(repo.changelog.count() - 1, -1, -1):
        n = repo.changelog.node(i)
        changes = repo.changelog.read(n)
        (p1, p2) = repo.changelog.parents(n)
        (h, h1, h2) = map(hg.hex, (n, p1, p2))
        (i1, i2) = map(repo.changelog.rev, (p1, p2))
        print "rev:      %4d:%s" % (i, h)
        print "parents:  %4d:%s" % (i1, h1)
        if i2: print "          %4d:%s" % (i2, h2)
        print "manifest: %4d:%s" % (repo.manifest.rev(changes[0]),
                                    hg.hex(changes[0]))
        print "user:", changes[1]
        print "date:", time.asctime(
            time.localtime(float(changes[2].split(' ')[0])))
        if ui.verbose: print "files:", " ".join(changes[3])
        print "description:"
        print changes[4]

def init(ui):
    """create a repository"""
    hg.repository(ui, ".", create=1)

def log(ui, repo, f):
    """show the revision history of a single file"""
    f = relpath(repo, [f])[0]

    r = repo.file(f)
    for i in range(r.count() - 1, -1, -1):
        n = r.node(i)
        (p1, p2) = r.parents(n)
        (h, h1, h2) = map(hg.hex, (n, p1, p2))
        (i1, i2) = map(r.rev, (p1, p2))
        cr = r.linkrev(n)
        cn = hg.hex(repo.changelog.node(cr))
        print "rev:       %4d:%s" % (i, h)
        print "changeset: %4d:%s" % (cr, cn)
        print "parents:   %4d:%s" % (i1, h1)
        if i2: print "           %4d:%s" % (i2, h2)
        changes = repo.changelog.read(repo.changelog.node(cr))
        print "user: %s" % changes[1]
        print "date: %s" % time.asctime(
            time.localtime(float(changes[2].split(' ')[0])))
        print "description:"
        print changes[4].rstrip()
        print

def manifest(ui, repo, rev = []):
    """output the latest or given revision of the project manifest"""
    n = repo.manifest.tip()
    if rev:
        n = repo.manifest.lookup(rev)
    m = repo.manifest.read(n)
    mf = repo.manifest.readflags(n)
    files = m.keys()
    files.sort()

    for f in files:
        ui.write("%40s %3s %s\n" % (hg.hex(m[f]), mf[f] and "755" or "644", f))

def parents(ui, repo, node = None):
    '''show the parents of the current working dir'''
    if node:
        p = repo.changelog.parents(repo.lookup(hg.bin(node)))
    else:
        p = repo.dirstate.parents()

    for n in p:
        if n != hg.nullid:
            ui.write("%d:%s\n" % (repo.changelog.rev(n), hg.hex(n)))

def patch(ui, repo, patches, **opts):
    """import an ordered set of patches"""
    try:
        import psyco
        psyco.full()
    except:
        pass
    
    d = opts["base"]
    strip = opts["strip"]
    quiet = opts["quiet"] and "> /dev/null" or ""

    for patch in patches:
        ui.status("applying %s\n" % patch)
        pf = os.path.join(d, patch)

        text = ""
        for l in file(pf):
            if l[:4] == "--- ": break
            text += l

        f = os.popen("lsdiff --strip %d %s" % (strip, pf))
        files = filter(None, map(lambda x: x.rstrip(), f.read().splitlines()))
        f.close()

        if files:
            if os.system("patch -p%d < %s %s" % (strip, pf, quiet)):
                raise "patch failed!"
        repo.commit(files, text)

def pull(ui, repo, source):
    """pull changes from the specified source"""
    paths = {}
    try:
        pf = os.path.expanduser("~/.hgpaths")
        for l in file(pf):
            name, path = l.split()
            paths[name] = path
    except IOError:
        pass

    if source in paths: source = paths[source]
    
    other = hg.repository(ui, source)
    cg = repo.getchangegroup(other)
    repo.addchangegroup(cg)

def rawcommit(ui, repo, files, **rc):
    "raw commit interface"

    text = rc['text']
    if not text and rc['logfile']:
        try: text = open(rc['logfile']).read()
        except IOError: pass
    if not text and not rc['logfile']:
        print "missing commit text"
        return 1

    files = relpath(repo, files)
    if rc['files']:
        files += open(rc['files']).read().splitlines()
        
    repo.rawcommit(files, text, rc['user'], rc['date'], *rc['parent'])
 
def recover(ui, repo):
    """roll back an interrupted transaction"""
    repo.recover()

def remove(ui, repo, file, *files):
    """remove the specified files on the next commit"""
    repo.remove(relpath(repo, (file,) + files))

def serve(ui, repo, **opts):
    """export the repository via HTTP"""
    hgweb.server(repo.root, opts["name"], opts["templates"],
                 opts["address"], opts["port"])
    
def status(ui, repo):
    '''show changed files in the working directory

    C = changed
    A = added
    R = removed
    ? = not tracked'''
    
    (c, a, d, u) = repo.diffdir(repo.root)
    (c, a, d, u) = map(lambda x: relfilter(repo, x), (c, a, d, u))

    for f in c: print "C", f
    for f in a: print "A", f
    for f in d: print "R", f
    for f in u: print "?", f

def tags(ui, repo):
    """list repository tags"""
    repo.lookup(0) # prime the cache
    i = repo.tags.items()
    n = []
    for e in i:
        try:
            l = repo.changelog.rev(e[1])
        except KeyError:
            l = -2
        n.append((l, e))

    n.sort()
    n.reverse()
    i = [ e[1] for e in n ]
    for k, n in i:
        try:
            r = repo.changelog.rev(n)
        except KeyError:
            r = "?"
        print "%-30s %5d:%s" % (k, repo.changelog.rev(n), hg.hex(n))

def tip(ui, repo):
    """show the tip revision"""
    n = repo.changelog.tip()
    t = repo.changelog.rev(n)
    ui.status("%d:%s\n" % (t, hg.hex(n)))

def undo(ui, repo):
    """undo the last transaction"""
    repo.undo()

def update(ui, repo, node=None, merge=False, clean=False):
    '''update or merge working directory

    If there are no outstanding changes in the working directory and
    there is a linear relationship between the current version and the
    requested version, the result is the requested version.

    Otherwise the result is a merge between the contents of the
    current working directory and the requested version. Files that
    changed between either parent are marked as changed for the next
    commit and a commit must be performed before any further updates
    are allowed.
    '''
    node = node and repo.lookup(node) or repo.changelog.tip()
    return repo.update(node, allow=merge, force=clean)

def verify(ui, repo):
    """verify the integrity of the repository"""
    return repo.verify()

# Command options and aliases are listed here, alphabetically

table = {
    "add": (add, [], "hg add [files]"),
    "addremove": (addremove, [], "hg addremove"),
    "ann|annotate": (annotate,
                     [('r', 'revision', '', 'revision'),
                      ('u', 'user', None, 'show user'),
                      ('n', 'number', None, 'show revision number'),
                      ('c', 'changeset', None, 'show changeset')],
                     'hg annotate [-u] [-c] [-n] [-r id] [files]'),
    "branch|clone": (branch, [], 'hg branch [path]'),
    "cat|dump": (cat, [], 'hg cat <file> [rev]'),
    "commit|ci": (commit, [], 'hg commit [files]'),
    "debugaddchangegroup": (debugaddchangegroup, [], 'debugaddchangegroup'),
    "debugchangegroup": (debugchangegroup, [], 'debugchangegroup [roots]'),
    "debugindex": (debugindex, [], 'debugindex <file>'),
    "debugindexdot": (debugindexdot, [], 'debugindexdot <file>'),
    "diff": (diff, [('r', 'rev', [], 'revision')],
             'hg diff [-r A] [-r B] [files]'),
    "export": (export, [], "hg export <changeset>"),
    "forget": (forget, [], "hg forget [files]"),
    "heads": (heads, [], 'hg heads'),
    "history": (history, [], 'hg history'),
    "help": (help, [], 'hg help [command]'),
    "init": (init, [], 'hg init'),
    "log": (log, [], 'hg log <file>'),
    "manifest|dumpmanifest": (manifest, [], 'hg manifest [rev]'),
    "parents": (parents, [], 'hg parents [node]'),
    "patch|import": (patch,
                     [('p', 'strip', 1, 'path strip'),
                      ('b', 'base', "", 'base path'),
                      ('q', 'quiet', "", 'silence diff')],
                     "hg import [options] patches"),
    "pull|merge": (pull, [], 'hg pull [source]'),
    "rawcommit": (rawcommit,
                  [('p', 'parent', [], 'parent'),
                   ('d', 'date', "", 'data'),
                   ('u', 'user', "", 'user'),
                   ('F', 'files', "", 'file list'),
                   ('t', 'text', "", 'commit text'),
                   ('l', 'logfile', "", 'commit text file')],
                  'hg rawcommit [options] [files]'),
    "recover": (recover, [], "hg recover"),
    "remove": (remove, [], "hg remove [files]"),
    "serve": (serve, [('p', 'port', 8000, 'listen port'),
                      ('a', 'address', '', 'interface address'),
                      ('n', 'name', os.getcwd(), 'repository name'),
                      ('t', 'templates', "", 'template map')],
              "hg serve [options]"),
    "status": (status, [], 'hg status'),
    "tags": (tags, [], 'hg tags'),
    "tip": (tip, [], 'hg tip'),
    "undo": (undo, [], 'hg undo'),
    "update|up|checkout|co|resolve": (update,
                                      [('m', 'merge', None,
                                        'allow merging of conflicts'),
                                       ('C', 'clean', None,
                                        'overwrite locally modified files')],
                                       'hg update [options] [node]'),
    "verify": (verify, [], 'hg verify'),
    }

norepo = "init branch help debugindex debugindexdot"

def find(cmd):
    i = None
    for e in table.keys():
        if re.match(e + "$", cmd):
            return table[e]

    raise UnknownCommand(cmd)

class SignalInterrupt(Exception): pass

def catchterm(*args):
    raise SignalInterrupt

def run():
    sys.exit(dispatch(sys.argv[1:]))

def dispatch(args):
    options = {}
    opts = [('v', 'verbose', None, 'verbose'),
            ('d', 'debug', None, 'debug'),
            ('q', 'quiet', None, 'quiet'),
            ('y', 'noninteractive', None, 'run non-interactively'),
            ]

    args = fancyopts.fancyopts(args, opts, options,
                               'hg [options] <command> [options] [files]')

    if not args:
        cmd = "help"
    else:
        cmd, args = args[0], args[1:]

    u = ui.ui(options["verbose"], options["debug"], options["quiet"],
           not options["noninteractive"])

    try:
        i = find(cmd)
    except UnknownCommand:
        u.warn("hg: unknown command '%s'\n" % cmd)
        help(u)
        sys.exit(1)

    signal.signal(signal.SIGTERM, catchterm)

    cmdoptions = {}
    args = fancyopts.fancyopts(args, i[1], cmdoptions, i[2])

    if cmd not in norepo.split():
        repo = hg.repository(ui = u)
        d = lambda: i[0](u, repo, *args, **cmdoptions)
    else:
        d = lambda: i[0](u, *args, **cmdoptions)

    try:
        return d()
    except SignalInterrupt:
        u.warn("killed!\n")
    except KeyboardInterrupt:
        u.warn("interrupted!\n")
    except IOError, inst:
        if inst.errno == 32:
            u.warn("broken pipe\n")
        else:
            raise
    except TypeError, inst:
        # was this an argument error?
        tb = traceback.extract_tb(sys.exc_info()[2])
        if len(tb) > 2: # no
            raise
        raise
        u.warn("%s: invalid arguments\n" % i[0].__name__)
        u.warn("syntax: %s\n" % i[2])
        sys.exit(-1)