#pragma once

#include "config.h"
#include "types.hh"

#include <map>
#include <sys/types.h>


namespace nix {

enum CompressionType
{
    COMPRESSION_NONE = 0,
    COMPRESSION_GZIP = 1
#if HAVE_BZLIB_H
    , COMPRESSION_BZIP2 = 2
#endif
};

struct Settings {

    typedef std::map<string, string> SettingsMap;

    Settings();

    void processEnvironment();

    void set(const string & name, const string & value);

    string get(const string & name, const string & def);

    Strings get(const string & name, const Strings & def);

    bool get(const string & name, bool def);

    int get(const string & name, int def);

    void update();

    string pack();

    SettingsMap getOverrides();

    /* The directory where we store sources and derived files. */
    Path nixStore;

    /* The directory where we log various operations. */
    Path nixLogDir;

    /* The directory where state is stored. */
    Path nixStateDir;

    /* The directory where we keep the SQLite database. */
    Path nixDBPath</td></tr></table>
<table class='tabs'><tr><td>
<a class='active' href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=befd383d5678b7b00453838c60a580e39d464dc0'>refs</a><a href='/guix/log/'>log</a><a href='/guix/tree/?id=befd383d5678b7b00453838c60a580e39d464dc0'>tree</a><a href='/guix/commit/?id=befd383d5678b7b00453838c60a580e39d464dc0'>commit</a><a href='/guix/diff/?id=befd383d5678b7b00453838c60a580e39d464dc0'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/'>
<input type='hidden' name='id' value='befd383d5678b7b00453838c60a580e39d464dc0'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='content'><div id='summary'><pre>
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Ludovic Courtès &lt;ludo@gnu.org&gt;
;;;
;;; 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 &lt;http://www.gnu.org/licenses/&gt;.

;;;
;;; Validate &apos;etc/news.scm&apos;.
;;;

(use-modules (git)
             (guix git)
             (guix ui)
             (guix channels)
             (srfi srfi-26)
             (ice-9 match))

;; XXX: These two things are currently private.
(define read-channel-news (@@ (guix channels) read-channel-news))
(define channel-news-entries (cut struct-ref &lt;&gt; 0))

(define (all-the-news directory)
  &quot;Return the &lt;channel-news&gt; read from DIRECTORY, a checkout of the &apos;guix&apos;
channel.&quot;
  (call-with-input-file (string-append directory &quot;/etc/news.scm&quot;)
    read-channel-news))

(define (validate-texinfo str type language)
  &quot;Parse STR as a Texinfo fragment and raise an error if that fails.&quot;
  (catch #t
    (lambda ()
      (texi-&gt;plain-text str))
    (lambda (key . args)
      (print-exception (current-error-port) #f key args)
      (report-error (G_ &quot;the Texinfo snippet below is invalid (~a, ~a):~%&quot;)
                    type language)
      (display str (current-error-port))
      (exit 1))))

(define (validate-news-entry repository entry)
  &quot;Validate ENTRY, a &lt;channel-news-entry&gt;, making sure it refers to an
existent commit of REPOSITORY and contains only valid Texinfo.&quot;
  (catch &apos;git-error
    (lambda ()
      (let ((commit (commit-lookup repository
                                   (string-&gt;oid
                                    (channel-news-entry-commit entry)))))
        (for-each (match-lambda
                    ((language . title)
                     (validate-texinfo title &apos;title language)))
                  (channel-news-entry-title entry))
        (for-each (match-lambda
                    ((language . body)
                     (validate-texinfo body &apos;body language)))
                  (channel-news-entry-body entry))))
    (lambda (key error . rest)
      (if (= GIT_ENOTFOUND (git-error-code error))
          (leave (G_ &quot;commit &apos;~a&apos; of entry &apos;~a&apos; does not exist~%&quot;)
                 (channel-news-entry-commit entry)
                 (channel-news-entry-title entry))
          (apply throw key error rest)))))

(let* ((this-directory (dirname (current-filename)))
       (top-directory  (string-append this-directory &quot;/..&quot;))
       (entries        (channel-news-entries (all-the-news top-directory))))
  (with-repository top-directory repository
    (for-each (cut validate-news-entry repository &lt;&gt;)
              entries)
    (info (G_ &quot;All ~a channel news entries are valid.~%&quot;)
          (length entries))))
</pre>
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    /* Whether to add derivations as a dependency of user environments
       (to prevent them from being GCed). */
    bool envKeepDerivations;

    /* Whether to lock the Nix client and worker to the same CPU. */
    bool lockCPU;

    /* Whether to show a stack trace if Nix evaluation fails. */
    bool showTrace;

private:
    SettingsMap settings, overrides;

    void _get(string & res, const string & name);
    void _get(bool & res, const string & name);
    void _get(StringSet & res, const string & name);
    void _get(Strings & res, const string & name);
    template<class N> void _get(N & res, const string & name);
};


// FIXME: don't use a global variable.
extern Settings settings;


extern const string nixVersion;


}