#!/usr/bin/python
from RepSys import Error, config, RepSysTree
from RepSys import mirror
from RepSys.svn import SVN
from RepSys.simplerpm import SRPM
from RepSys.log import specfile_svn2rpm
from RepSys.util import execcmd
from RepSys.command import default_parent
import rpm
import urlparse
import tempfile
import shutil
import string
import glob
import sys
import os

def get_spec(pkgdirurl, targetdir=".", submit=False):
    svn = SVN()
    tmpdir = tempfile.mktemp()
    try:
        geturl = "/".join([pkgdirurl, "current", "SPECS"])
        svn.export("'%s'" % geturl, tmpdir)
        speclist = glob.glob(os.path.join(tmpdir, "*.spec"))
        if not speclist:
            raise Error, "no spec files found"
        spec = speclist[0]
        shutil.copy(spec, targetdir)
    finally:
        if os.path.isdir(tmpdir):
            shutil.rmtree(tmpdir)

def rpm_macros_defs(macros):
    defs = ("--define \"%s %s\"" % macro for macro in macros)
    args = " ".join(defs)
    return args

#FIXME move it to another module
def rev_touched_url(url, rev):
    svn = SVN()
    info = svn.info2(url)
    if info is None:
        raise Error, "can't fetch svn info about the URL: %s" % url
    root = info["Repository Root"]
    urlpath = url[len(root):]
    touched = False
    entries = svn.log(root, start=rev, limit=1)
    entry = entries[0]
    for change in entry.changed:
        path = change.get("path")
        if path and path.startswith(urlpath):
            touched = True
    return touched

def svn_url_rev(url, retrieve=True):
    """Get the revision from a given URL

    If the URL contains an explicit revision number (URL@REV), just use it
    without even checking if the revision really exists.

    The parameter retrieve defines whether it must ask the SVN server for
    the revision number or not when it is not found in the URL.
    """
    parsed = urlparse.urlparse(url)
    path = os.path.normpath(parsed[2])
    dirs = path.rsplit("/", 1)
    lastname = dirs[-1]
    index = lastname.rfind("@")
    rev = None
    if index != -1:
        rawrev = lastname[index+1:]
        if rawrev:
            try:
                rev = int(rawrev)
                if rev < 0:
                    raise ValueError
            except ValueError:
                raise Error, "invalid revision specification on URL: %s" % url
    if rev is None and retrieve:
        # if no revspec was found, ask the server
        svn = SVN()
        rev = svn.revision(url)
    return rev

def strip_url_rev(url):
    """Removes the @REV from a string in the URL@REV scheme"""
    parsed = list(urlparse.urlparse(url))
    path = os.path.normpath(parsed[2])
    dirs = path.rsplit("/", 1)
    name = lastname = dirs[-1]
    try:
        index = lastname.rindex("@")
    except ValueError:
        pass
    else:
        name = lastname[:index]
    parsed[2] = os.path.join(dirs[0], name)
    return urlparse.urlunparse(parsed)

def get_srpm(pkgdirurl,
             mode = "current",
             targetdirs = None,
             version = None,
             release = None,
             revision = None,
             packager = "",
             revname = 0,
             svnlog = 0,
             scripts = [], 
             submit = False,
             template = None,
             macros = [],
             verbose = 0,
             strict = False):
    svn = SVN()
    tmpdir = tempfile.mktemp()
    topdir = "--define '_topdir %s'" % tmpdir
    builddir = "--define '_builddir %s/%s'" % (tmpdir, "BUILD")
    rpmdir = "--define '_rpmdir %s/%s'" % (tmpdir, "RPMS")
    sourcedir = "--define '_sourcedir %s/%s'" % (tmpdir, "SOURCES")
    specdir = "--define '_specdir %s/%s'" % (tmpdir, "SPECS")
    srcrpmdir = "--define '_srcrpmdir %s/%s'" % (tmpdir, "SRPMS")
    patchdir = "--define '_patchdir %s/%s'" % (tmpdir, "SOURCES")
    try:
        if mode == "version":
            geturl = os.path.join(pkgdirurl, "releases",
                                  version, release)
        elif mode == "pristine":
            geturl = os.path.join(pkgdirurl, "pristine")
        elif mode == "current" or mode == "revision":
            #FIXME we should handle revisions specified using @REV
            geturl = os.path.join(pkgdirurl, "current")
        else:
            raise Error, "unsupported get_srpm mode: %s" % mode
        strict = strict or config.getbool("submit", "strict-revision", False)
        if strict and not rev_touched_url(geturl, revision):
            #FIXME would be nice to have the revision number even when
            # revision is None
            raise Error, "the revision %s does not change anything "\
                    "inside %s" % (revision or "HEAD", geturl)
        svn.export(geturl, tmpdir, rev=revision)
        srpmsdir = os.path.join(tmpdir, "SRPMS")
        os.mkdir(srpmsdir)
        specsdir = os.path.join(tmpdir, "SPECS")
        speclist = glob.glob(os.path.join(specsdir, "*.spec"))
        if not speclist:
            raise Error, "no spec files found"
        spec = speclist[0]
        if svnlog:
            submit = not not revision
            specfile_svn2rpm(pkgdirurl, spec, revision, submit=submit,
                    template=template, macros=macros, exported=tmpdir)
        for script in scripts:
            #FIXME revision can be "None"
            status, output = execcmd(script, tmpdir, spec, str(revision),
                                     noerror=1)
            if status != 0:
                raise Error, "script %s failed" % script
        if packager:
            packager = " --define 'packager %s'" % packager

        defs = rpm_macros_defs(macros)
        execcmd("rpm -bs --nodeps %s %s %s %s %s %s %s %s %s %s" %
            (topdir, builddir, rpmdir, sourcedir, specdir, 
             srcrpmdir, patchdir, packager, spec, defs))

        # copy the generated SRPMs to their target locations
        targetsrpms = []
        urlrev = None
        if revname:
            urlrev = revision or svn_url_rev(geturl)
        if not targetdirs:
            targetdirs = (".",)
        srpms = glob.glob(os.path.join(srpmsdir, "*.src.rpm"))
        if not srpms:
            # something fishy happened
            raise Error, "no SRPMS were found at %s" % srpmsdir
        for srpm in srpms:
            name = os.path.basename(srpm)
            if revname:
                name = "@%s:%s" % (urlrev, name)
            for targetdir in targetdirs:
                newpath = os.path.join(targetdir, name)
                targetsrpms.append(newpath)
                if os.path.exists(newpath):
                    # should we warn?
                    os.unlink(newpath)
                shutil.copy(srpm, newpath)
                if verbose:
                    sys.stderr.write("Wrote: %s\n" %  newpath)
        return targetsrpms
    finally:
        if os.path.isdir(tmpdir):
            shutil.rmtree(tmpdir)

def patch_spec(pkgdirurl, patchfile, log=""):
    svn = SVN()
    tmpdir = tempfile.mktemp()
    try:
        geturl = "/".join([pkgdirurl, "current", "SPECS"])
        svn.checkout(geturl, tmpdir)
        speclist = glob.glob(os.path.join(tmpdir, "*.spec"))
        if not speclist:
            raise Error, "no spec files found"
        spec = speclist[0]
        status, output = execcmd("patch", spec, patchfile)
        if status != 0:
            raise Error, "can't apply patch:\n%s\n" % output
        else:
            svn.commit(tmpdir, log="")
    finally:
        if os.path.isdir(tmpdir):
            shutil.rmtree(tmpdir)

def put_srpm(pkgdirurl, srpmfile, appendname=0, log=""):
    srpm = SRPM(srpmfile)
    if appendname:
        pkgdirurl = "/".join([pkgdirurl, srpm.name])
    svn = SVN()
    tmpdir = tempfile.mktemp()
    try:
        if srpm.epoch:
            version = "%s:%s" % (srpm.epoch, srpm.version)
        else:
            version = srpm.version
        versionurl = "/".join([pkgdirurl, "releases", version])
        releaseurl = "/".join([versionurl, srpm.release])
        #FIXME when pre-commit hook fails, there's no clear way to know
        # what happened
        ret = svn.mkdir(pkgdirurl, noerror=1, log="Created package directory")
        if ret:
            svn.checkout(pkgdirurl, tmpdir)
            svn.mkdir(os.path.join(tmpdir, "releases"))
            svn.mkdir(os.path.join(tmpdir, "releases", version))
            svn.mkdir(os.path.join(tmpdir, "current"))
            svn.mkdir(os.path.join(tmpdir, "current", "SPECS"))
            svn.mkdir(os.path.join(tmpdir, "current", "SOURCES"))
            #svn.commit(tmpdir,log="Created package structure.")
            version_exists = 1
            currentdir = os.path.join(tmpdir, "current")
        else:
            if svn.ls(releaseurl, noerror=1):
                raise Error, "release already exists"
            svn.checkout("/".join([pkgdirurl, "current"]), tmpdir)
            svn.mkdir(versionurl, noerror=1,
                      log="Created directory for version %s." % version)
            currentdir = tmpdir
         
        specsdir = os.path.join(currentdir, "SPECS")
        sourcesdir = os.path.join(currentdir, "SOURCES")

        unpackdir = tempfile.mktemp()
        os.mkdir(unpackdir)
        try:
            srpm.unpack(unpackdir)

            uspecsdir = os.path.join(unpackdir, "SPECS")
            usourcesdir = os.path.join(unpackdir, "SOURCES")
            
            uspecsentries = os.listdir(uspecsdir)
            usourcesentries = os.listdir(usourcesdir)
            specsentries = os.listdir(specsdir)
            sourcesentries = os.listdir(sourcesdir)

            # Remove old entries
            for entry in [x for x in specsentries
                             if x not in uspecsentries]:
                if entry == ".svn":
                    continue
                entrypath = os.path.join(specsdir, entry)
                os.unlink(entrypath)
                svn.remove(entrypath)
            for entry in [x for x in sourcesentries
                             if x not in usourcesentries]:
                if entry == ".svn":
                    continue
                entrypath = os.path.join(sourcesdir, entry)
                os.unlink(entrypath)
                svn.remove(entrypath)

            # Copy all files
            execcmd("cp -rf", uspecsdir, currentdir)
            execcmd("cp -rf", usourcesdir, currentdir)
            
            # Add new entries
            for entry in [x for x in uspecsentries
                             if x not in specsentries]:
                entrypath = os.path.join(specsdir, entry)
                svn.add(entrypath)
            for entry in [x for x in usourcesentries
                             if x not in sourcesentries]:
                entrypath = os.path.join(sourcesdir, entry)
                svn.add(entrypath)
        finally:
            if os.path.isdir(unpackdir):
                shutil.rmtree(unpackdir)

        svn.commit(tmpdir, log=log)
    finally:
        if os.path.isdir(tmpdir):
            shutil.rmtree(tmpdir)

    # Do revision and pristine tag copies
    pristineurl = os.path.join(pkgdirurl, "pristine")
    svn.remove(pristineurl, noerror=1,
               log="Removing previous pristine/ directory.")
    currenturl = os.path.join(pkgdirurl, "current")
    svn.copy(currenturl, pristineurl,
             log="Copying release %s-%s to pristine/ directory." %
                 (version, srpm.release))
    svn.copy(currenturl, releaseurl,
             log="Copying release %s-%s to releases/ directory." %
                 (version, srpm.release))

def create_package(pkgdirurl, log="", verbose=0):
    svn = SVN()
    tmpdir = tempfile.mktemp()
    try:
        basename = RepSysTree.pkgname(pkgdirurl)
        if verbose:
            print "Creating package directory...",
        sys.stdout.flush()
        ret = svn.mkdir(pkgdirurl,
                        log="Created package directory for '%s'." % basename)
        if verbose:
            print "done"
            print "Checking it out...",
        svn.checkout(pkgdirurl, tmpdir)
        if verbose:
            print "done"
            print "Creating package structure...",
        svn.mkdir(os.path.join(tmpdir, "current"))
        svn.mkdir(os.path.join(tmpdir, "current", "SPECS"))
        svn.mkdir(os.path.join(tmpdir, "current", "SOURCES"))
        if verbose:
            print "done"
            print "Committing...",
        svn.commit(tmpdir,
                   log="Created package structure for '%s'." % basename)
        print "done"
    finally:
        if os.path.isdir(tmpdir):
            shutil.rmtree(tmpdir)


def create_markrelease_log(version, release, revision):
    log = """%%repsys markrelease
version: %s
release: %s
revision: %s

%s""" % (version, release, revision, 
        ("Copying %s-%s to releases/ directory." % (version, release)))
    return log

def mark_release(pkgdirurl, version, release, revision):
    svn = SVN()
    releasesurl = "/".join([pkgdirurl, "releases"])
    versionurl = "/".join([releasesurl, version])
    releaseurl = "/".join([versionurl, release])
    if svn.ls(releaseurl, noerror=1):
        raise Error, "release already exists"
    svn.mkdir(releasesurl, noerror=1,
              log="Created releases directory.")
    svn.mkdir(versionurl, noerror=1,
              log="Created directory for version %s." % version)
    pristineurl = os.path.join(pkgdirurl, "pristine")
    svn.remove(pristineurl, noerror=1,
               log="Removing previous pristine/ directory.")
    currenturl = os.path.join(pkgdirurl, "current")
    svn.copy(currenturl, pristineurl,
             log="Copying release %s-%s to pristine/ directory." %
                 (version, release))
    markreleaselog = create_markrelease_log(version, release, revision)
    svn.copy(currenturl, releaseurl, rev=revision,
             log=markreleaselog)

def check_changed(pkgdirurl, all=0, show=0, verbose=0):
    svn = SVN()
    if all:
        baseurl = pkgdirurl
        packages = []
        if verbose:
            print "Getting list of packages...",
            sys.stdout.flush()
        packages = [x[:-1] for x in svn.ls(baseurl)]
        if verbose:
            print "done"
        if not packages:
            raise Error, "couldn't get list of packages"
    else:
        baseurl, basename = os.path.split(pkgdirurl)
        packages = [basename]
    clean = []
    changed = []
    nopristine = []
    nocurrent = []
    for package in packages:
        pkgdirurl = os.path.join(baseurl, package)
        current = os.path.join(pkgdirurl, "current")
        pristine = os.path.join(pkgdirurl, "pristine")
        if verbose:
            print "Checking package %s..." % package,
            sys.stdout.flush()
        if not svn.ls(current, noerror=1):
            if verbose:
                print "NO CURRENT"
            nocurrent.append(package)
        elif not svn.ls(pristine, noerror=1):
            if verbose:
                print "NO PRISTINE"
            nopristine.append(package)
        else:
            diff = svn.diff(pristine, current)
            if diff:
                changed.append(package)
                if verbose:
                    print "CHANGED"
                if show:
                    print diff
            else:
                if verbose:
                    print "clean"
                clean.append(package)
    if verbose:
        if not packages:
            print "No packages found!"
        elif all:
            print "Total clean packages: %s" % len(clean)
            print "Total CHANGED packages: %d" % len(changed)
            print "Total NO CURRENT packages: %s" % len(nocurrent)
            print "Total NO PRISTINE packages: %s" % len(nopristine)
    return {"clean": clean,
            "changed": changed,
            "nocurrent": nocurrent,
            "nopristine": nopristine}

def checkout(pkgdirurl, path=None, revision=None, use_mirror=True):
    o_pkgdirurl = pkgdirurl
    pkgdirurl = default_parent(o_pkgdirurl)
    current = os.path.join(pkgdirurl, "current")
    if path is None:
        _, path = os.path.split(pkgdirurl)
    # if default_parent changed the URL, we can use mirrors because the
    # user did not provided complete package URL
    if (o_pkgdirurl != pkgdirurl) and use_mirror and mirror.enabled():
        current = mirror.checkout_url(current)
        print "checking out from mirror", current
    svn = SVN()
    svn.checkout(current, path, rev=revision, show=1)

def _getpkgtopdir(basedir=None):
    if basedir is None:
        basedir = os.getcwd()
    cwd = os.getcwd()
    dirname = os.path.basename(cwd)
    if dirname == "SPECS" or dirname == "SOURCES":
        topdir = os.pardir
    else:
        topdir = ""
    return topdir

def sync(dryrun=False, download=False):
    svn = SVN()
    topdir = _getpkgtopdir()
    # run svn info because svn st does not complain when topdir is not an
    # working copy
    svn.info(topdir or ".")
    specsdir = os.path.join(topdir, "SPECS/")
    sourcesdir = os.path.join(topdir, "SOURCES/")
    for path in (specsdir, sourcesdir):
        if not os.path.isdir(path):
            raise Error, "%s directory not found" % path
    specs = glob.glob(os.path.join(specsdir, "*.spec"))
    if not specs:
        raise Error, "no .spec files found in %s" % specsdir
    specpath = specs[0] # FIXME better way?
    try:
        rpm.addMacro("_topdir", os.path.abspath(topdir))
        spec = rpm.TransactionSet().parseSpec(specpath)
    except rpm.error, e:
        raise Error, "could not load spec file: %s" % e
    sources = dict((os.path.basename(name), name)
            for name, no, flags in spec.sources())
    sourcesst = dict((os.path.basename(path), (path, st))
            for st, path in svn.status(sourcesdir, noignore=True))
    toadd = []
    for source, url in sources.iteritems():
        sourcepath = os.path.join(sourcesdir, source)
        pst = sourcesst.get(source)
        if pst:
            if os.path.isfile(sourcepath):
                toadd.append(sourcepath)
            else:
                sys.stderr.write("warning: %s not found, skipping\n" % sourcepath)
        elif download and not os.path.isfile(sourcepath):
            print "%s not found, downloading from %s" % (sourcepath, url)
            fmt = config.get("global", "download-command",
                    "wget -c -O '$dest' $url")
            context = {"dest": sourcepath, "url": url}
            try:
                cmd = string.Template(fmt).substitute(context)
            except KeyError, e:
                raise Error, "invalid variable %r in download-command "\
                        "configuration option" % e
            execcmd(cmd, show=True)
            if os.path.isfile(sourcepath):
                toadd.append(sourcepath)
            else:
                raise Error, "file not found: %s" % sourcepath
    # rm entries not found in sources and still in svn
    found = os.listdir(sourcesdir)
    toremove = []
    for entry in found:
        if entry == ".svn":
            continue
        status = sourcesst.get(entry)
        if status is None and entry not in sources:
            path = os.path.join(sourcesdir, entry)
            toremove.append(path)
    for path in toremove:
        print "D\t%s" % path
        if not dryrun:
            svn.remove(path, local=True)
    for path in toadd:
        print "A\t%s" % path
        if not dryrun:
            svn.add(path, local=True)

def commit(target=".", message=None, logfile=None):
    svn = SVN()
    status = svn.status(target, quiet=True)
    if not status:
        print "nothing to commit"
        return
    info = svn.info2(target)
    url = info.get("URL")
    if url is None:
        raise Error, "working copy URL not provided by svn info"
    mirrored = mirror.enabled(url)
    if mirrored:
        newurl = mirror.switchto_parent(svn, url, target)
        print "relocated to", newurl
    # we can't use the svn object here because svn --non-interactive option
    # hides VISUAL
    opts = []
    if message is not None:
        opts.append("-m \"%s\"" % message)
    if logfile is not None:
        opts.append("-F \"%s\"" % logfile)
    mopts = " ".join(opts)
    os.system("svn ci %s %s" % (mopts, target))
    if mirrored:
        print "use \"repsys switch\" in order to switch back to mirror "\
                "later"

def switch(mirrorurl=None):
    svn  = SVN()
    topdir = _getpkgtopdir()
    info = svn.info2(topdir)
    wcurl = info.get("URL")
    if wcurl is None:
        raise Error, "working copy URL not provided by svn info"
    newurl = mirror.autoswitch(svn, topdir, wcurl, mirrorurl)
    print "switched to", newurl

def get_submit_info(path):
    path = os.path.abspath(path)

    # First, look for SPECS and SOURCES directories.
    found = False
    while path != "/":
        if os.path.isdir(path):
            specsdir = os.path.join(path, "SPECS")
            sourcesdir = os.path.join(path, "SOURCES")
            if os.path.isdir(specsdir) and os.path.isdir(sourcesdir):
                found = True
                break
        path = os.path.dirname(path)
    if not found:
        raise Error, "SPECS and/or SOURCES directories not found"

    # Then, check if this is really a subversion directory.
    if not os.path.isdir(os.path.join(path, ".svn")):
        raise Error, "subversion directory not found"
    
    svn = SVN()

    # Now, extract the package name.
    info = svn.info2(path)
    url = info.get("URL")
    if url is None:
        raise Error, "missing URL from svn info %s" % path
    toks = url.split("/")
    if len(toks) < 2 or toks[-1] != "current":
        raise Error, "unexpected URL received from 'svn info'"
    name = toks[-2]
    url = "/".join(toks[:-1])

    # Finally, guess revision.
    max = -1
    files = []
    files.extend(glob.glob("%s/*" % specsdir))
    files.extend(glob.glob("%s/*" % sourcesdir))
    for file in files:
        info = svn.info2(file)
        if info is None:
            continue
        rawrev = info.get("Last Changed Rev")
        if rawrev:
            rev = int(rawrev)
            if rev > max:
                max = rev
    if max == -1:
        raise Error, "revision tag not found in 'svn info' output"
    
    return name, url, max

# vim:et:ts=4:sw=4