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/* GNU Guix --- Functional package management for GNU
Copyright (C) 2013, 2014 Ludovic Courtès <ludo@gnu.org>
Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012,
2013 Eelco Dolstra <eelco.dolstra@logicblox.com>
This file is part of GNU Guix.
GNU Guix 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.
GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
/* This file derives from the implementation of 'nix-store
--register-validity', by Eelco Dolstra, as found in the Nix package
manager's src/nix-store/nix-store.cc. */
#include <config.h>
#include <globals.hh>
#include <local-store.hh>
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <cstdio>
#include <argp.h>
#include <gcrypt.h>
using namespace nix;
/* Input stream where we read closure descriptions. */
static std::istream *input = &std::cin;
/* Command-line options. */
const char *argp_program_version =
"guix-register (" PACKAGE_NAME ") " PACKAGE_VERSION;
const char *argp_program_bug_address = PACKAGE_BUGREPORT;
static char doc[] =
"guix-register -- register a closure as valid in a store\
\v\
This program is used internally when populating a store with data \
from an existing store. It updates the new store's database with \
information about which store files are valid, and what their \
references are.";
static const struct argp_option options[] =
{
{ "prefix", 'p', "DIRECTORY", 0,
"Open the store that lies under DIRECTORY" },
{ 0, 0, 0, 0, 0 }
};
/* Prefix of the store being populated. */
static std::string prefix;
/* Parse a single option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case 'p':
{
prefix = canonPath (arg);
settings.nixStore = prefix + NIX_STORE_DIR;
settings.nixDataDir = prefix + NIX_DATA_DIR;
settings.nixLogDir = prefix + NIX_LOG_DIR;
settings.nixStateDir = prefix + NIX_STATE_DIR;
settings.nixDBPath = settings.nixStateDir + "/db";
break;
}
case ARGP_KEY_ARG:
{
std::ifstream *file;
if (state->arg_num >= 2)
/* Too many arguments. */
argp_usage (state);
file = new std::ifstream ();
file->open (arg);
input = file;
}
break;
default:
return (error_t) ARGP_ERR_UNKNOWN;
}
return (error_t) 0;
}
/* Argument parsing. */
static struct argp argp = { options, parse_opt, 0, doc };
/* Read from INPUT the description of a closure, and register it as valid in
STORE. The expected format on INPUT is that used by #:references-graphs:
FILE
DERIVER
NUMBER-OF-REFERENCES
REF1
...
REFN
This is really meant as an internal format. */
static void
register_validity (LocalStore *store, std::istream &input,
bool reregister = true, bool hashGiven = false,
bool canonicalise = true)
{
ValidPathInfos infos;
while (1)
{
ValidPathInfo info = decodeValidPathInfo (input, hashGiven);
if (info.path == "")
break;
if (!prefix.empty ())
{
/* Rewrite the input to refer to the final name, as if we were in a
chroot under PREFIX. */
std::string final_prefix (NIX_STORE_DIR "/");
info.path = final_prefix + baseNameOf (info.path);
}
/* Keep its real path to canonicalize it and compute its hash. */
std::string real_path;
real_path = prefix + "/" + settings.nixStore + "/" + baseNameOf (info.path);
if (!store->isValidPath (info.path) || reregister)
{
/* !!! races */
if (canonicalise)
canonicalisePathMetaData (real_path, -1);
if (!hashGiven)
{
HashResult hash = hashPath (htSHA256, real_path);
info.hash = hash.first;
info.narSize = hash.second;
}
infos.push_back (info);
}
}
store->registerValidPaths (infos);
}
int
main (int argc, char *argv[])
{
/* Initialize libgcrypt, which is indirectly used. */
if (!gcry_check_version (GCRYPT_VERSION))
{
fprintf (stderr, "error: libgcrypt version mismatch\n");
exit (EXIT_FAILURE);
}
/* Tell Libgcrypt that initialization has completed, as per the Libgcrypt
1.6.0 manual (although this does not appear to be strictly needed.) */
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
/* Honor the environment variables, and initialize the settings. */
settings.processEnvironment ();
try
{
argp_parse (&argp, argc, argv, 0, 0, 0);
/* Instantiate the store. This creates any missing directories among
'settings.nixStore', 'settings.nixDBPath', etc. */
LocalStore store;
if (!prefix.empty ())
/* Under the --prefix tree, the final name of the store will be
NIX_STORE_DIR. Set it here so that the database uses file names
prefixed by NIX_STORE_DIR and not PREFIX + NIX_STORE_DIR. */
settings.nixStore = NIX_STORE_DIR;
register_validity (&store, *input);
}
catch (std::exception &e)
{
fprintf (stderr, "error: %s\n", e.what ());
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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