# 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, time, mdiff
from mercurial import fancyopts, ui, hg

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

 add [files...]        add the given files in the next commit
 addremove             add all new files, delete all missing files
 annotate [files...]   show changeset number per file line
 branch <path>         create a branch of <path> in this directory
 checkout [changeset]  checkout the latest or given changeset
 commit                commit all changes to the repository
 diff [files...]       diff working directory (or selected files)
 dump <file> [rev]     dump the latest or given revision of a file
 dumpmanifest [rev]    dump the latest or given revision of the manifest
 export <rev>          dump the changeset header and diffs for a revision
 history               show changeset history
 init                  create a new repository in this directory
 log <file>            show revision history of a single file
 merge <path>          merge changes from <path> into local repository
 recover               rollback an interrupted transaction
 remove [files...]     remove the given files in the next commit
 serve                 export the repository via HTTP
 status                show new, missing, and changed files in working dir
 tags                  show current changeset tags
 undo                  undo the last transaction
""")

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

def addremove(ui, repo):
    (c, a, d, u) = repo.diffdir(repo.root)
    repo.add(a)
    repo.remove(d)

def annotate(u, repo, file, *files, **ops):
    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 = []):
    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):
    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):
    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()):
        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 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 init(ui):
    """create a repository"""
    hg.repository(ui, ".", create=1)

def log(ui, repo, f):
    f = relpath(repo, [f])[0]

    r = repo.file(f)
    for i in range(r.count()):
        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 = []):
    n = repo.manifest.tip()
    if rev:
        n = repo.manifest.lookup(rev)
    m = repo.manifest.read(n)
    files = m.keys()
    files.sort()

    for f in files:
        print hg.hex(m[f]), 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 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):
    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):
    from mercurial import hgweb
    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):
    repo.lookup(0) # prime the cache
    i = repo.tags.items()
    i.sort()
    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):
    n = repo.changelog.tip()
    t = repo.changelog.rev(n)
    ui.status("%d:%s\n" % (t, hg.hex(n)))

def undo(ui, repo):
    repo.undo()

def update(ui, repo, node=None):
    '''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()
    repo.update(node)

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

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, [], 'hg update [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("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:
        import traceback
        # was this an argument error?
        tb = traceback.extract_tb(sys.exc_info()[2])
        if len(tb) > 2: # no
            raise
        u.warn("%s: invalid arguments\n" % i[0].__name__)
        u.warn("syntax: %s\n" % i[2])
        sys.exit(-1)