//
// aegis - project change supervisor
// Copyright (C) 2001, 2003-2008, 2014 Peter Miller
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see
// <http://www.gnu.org/licenses/>.
//

#include <common/nstring/list.h>
#include <libaegis/os.h>

#include <aeimport/format/rcs.h>
#include <aeimport/format/rcs/gram.h>
#include <aeimport/format/version.h>


format_rcs::~format_rcs()
{
}


format_rcs::format_rcs()
{
}


format_rcs::pointer
format_rcs::create(void)
{
    return pointer(new format_rcs());
}


bool
format_rcs::is_a_candidate(const nstring &filename)
{
    return filename.ends_with(",v");
}


nstring
format_rcs::sanitize(const nstring &filename, bool last_part)
{
    //
    // Break the filename into path elements.
    //
    nstring_list sl;
    sl.split(filename, "/");

    //
    // Get rid of path elements named "RCS" or "CVS" or "Attic".
    //
    nstring_list sl2;
    for (size_t j = 0; j < sl.size(); ++j)
    {
        nstring s = sl[j];
        if (s != "RCS" && s != "CVS" && s != "Attic")
            sl2.push_back(s);
    }

    if (last_part)
    {
        //
        // Remove the ",v" from the end of the last path element.
        //
        if (sl2.size())
        {
            nstring s = sl2.back();
            if (s.ends_with(",v"))
            {
                s = s.substr(0, s.size() - 2);
                sl2.pop_back();
                sl2.push_back(s);
            }
        }
    }

    //
    // Rebuild the filename from the remaining path elements.
    //
    return sl2.unsplit("/");
}


format_version *
format_rcs::read_versions(const nstring &physical, const nstring &logical)
{
    return rcs_parse(physical, logical);
}


nstring
format_rcs::history_put(void)
{
    return
        (
            "ci -u -d -M -m${quote ($version) ${change description}} "
                "-t/dev/null ${quote $input} ${quote $history,v}; "
            "rcs -U ${quote $history,v}"
        );
}


nstring
format_rcs::history_get(void)
{
    return
        (
            "co -r${quote $edit} -p ${quote $history,v} > ${quote $output}"
        );
}


nstring
format_rcs::history_query(void)
{
    return
        (
            "rlog -r ${quote $history,v} | awk '/^revision/ {print $$2}'"
        );
}


nstring
format_rcs::diff(void)
{
    //
    // I'd prefer to say "diff -U10", but we can't rely on GNU
    // Diff being installed everywhere.  It's a risk even using
    // a context diff, because not all non-GNU diff progs have -c.
    //
    return
        (
            "set +e; "
            CONF_DIFF " "
#ifdef HAVE_GNU_DIFF
                "-U10 --text "
#else
                "-c "
#endif
                "${quote $original} ${quote $input} > ${quote $output}; "
            "test $? -le 1"
        );
}


nstring
format_rcs::merge(void)
{
    return
        (
            "set +e; "
            "merge -p -L baseline -L C$c ${quote $mostrecent} "
                "${quote $original} ${quote $input} > ${quote $output}; "
            "test $? -le 1"
        );
}


void
format_rcs::unlock(const nstring &filename)
{
    //
    // -b   means resume working from the trunk, not a branch
    // -e   means get rid of any access list
    // -ko  means no keyword expansion
    // -M   means do not send mail
    // -q   means operate quietly
    // -U   means set locking to non-strict
    //
    // There doesn't seem to be an option to get rid of all locks.
    //
    nstring qfn = filename.quote_shell();
    nstring cmd = "rcs -b -e -M -q -U " + qfn;
    int flags = OS_EXEC_FLAG_ERROK;
    nstring dir = ".";
    os_execute(cmd, flags, dir);
}


bool
format_rcs::valid(void)
    const
{
    return format::valid();
}


// vim: set ts=8 sw=4 et :