summaryrefslogtreecommitdiff
path: root/macros/latex-dev/base/ltvers.dtx
blob: 0e374f5dec00ccb069add256aa20b7a71315916c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
% \iffalse meta-comment
%
% Copyright (C) 1993-2020
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%    https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
%
% \iffalse
%%% From File: ltvers.dtx
%
%<*driver>
% \fi
\ProvidesFile{ltvers.dtx}
             [2020/03/02 v1.1e LaTeX Kernel (Version Info)]
% \iffalse
\documentclass{ltxdoc}
\GetFileInfo{ltvers.dtx}
\title{\filename}
\date{\filedate}
 \author{%
  Johannes Braams\and
  David Carlisle\and
  Alan Jeffrey\and
  Leslie Lamport\and
  Frank Mittelbach\and
  Chris Rowley\and
  Rainer Sch\"opf}
\begin{document}
 \MaintainedByLaTeXTeam{latex}
 \maketitle
 \DocInput{\filename}
\end{document}
%</driver>
% \fi
%
%
% \section{Version Identification}
% First we identify the date and version number of this release of
% \LaTeX, and set |\everyjob| so that it is printed at the start of
% every \LaTeX\ run.
%
% \StopEventually{}
%
% \changes{v1.0g}{1996/11/28}
%     {Check for old format modified /2319}
% \changes{v1.0f}{1996/11/20}
%     {Check for old format modified /2319}
% \changes{v1.0e}{1995/05/12}
%     {Add autoload docstrip guards}
% \changes{v1.0e}{1995/05/12}
%     {Check for format older than 1 year}
% \changes{v1.0d}{1994/05/25}
%     {Remove PRELIMINARY TEST RELEASE from startup banner
%      (spring is here)}
% \changes{v1.0b}{1994/04/12}
%     {Have version info generated automatically.}
% \changes{v1.0a}{1994/03/04}
%     {Initial version, split from latex.dtx}
% \changes{v1.0r}{2015/02/21}{Removed autoload code}
% \changes{v1.0t}{2015/06/23}
%     {set \cs{patch@level} in ltvers rather than in ltfinal/ltpatch}
%
% \begin{macro}{\fmtname}
% \begin{macro}{\fmtversion}
% \begin{macro}{\latexreleaseversion}
% \begin{macro}{\patch@level}
%    A |\patch@level| of \texttt{0} or higher denotes an official
%    public release. A negative value indicates a candidate release
%    that is not distributed.
%
%    If we put code updates into the kernel that are supposed to go
%    into the next release we set the |\patch@level| to \texttt{-1}
%    and the |\fmtversion| / |\latexreleaseversion| to  the dated of
%    the next release (guessed, the real value is not so important and
%    will get corrected when we make the release official).
%
%    If the |\patch@level| is already at \texttt{-1} we do nothing
%    here and use the |\fmtversion| date for  any new|\IncludeInRelease|
%    line when we add further code.
%
%    Finally, if we do make a public release we either just set the
%    |\patch@level| to zero (if our initial guess was good) or we also
%    change the date and then have to additionally change to that date
%    on all the |\IncludeInRelease| statements that used the
%    ``guessed'' date.
%    \begin{macrocode}
%<*2ekernel>
\def\fmtname{LaTeX2e}
\edef\fmtversion
%</2ekernel>
%<latexrelease>\edef\latexreleaseversion
%<*2ekernel|latexrelease>
   {2021-05-01}
%</2ekernel|latexrelease>
%<*2ekernel>
\def\patch@level{0}
%    \end{macrocode}
%
% \begin{macro}{\development@branch@name}
%    For more fine grain control there is the possibility to name the
%    current development branch. This is only used when the
%    \cs{patch@level} is negative (i.e., a pre-release format) and is
%    intended to help us internally when we locally install a
%    format out of some development branch.
%    \begin{macrocode}
\edef\development@branch@name{develop \the\year-\the\month-\the\day}
%    \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% Check that the format being made is not too old.
% The error message complains about `more than 5 years'
% but in fact the error is not triggered until 65 months.
%
% This code is currently not activated as we don't know if we already
% got to the last official 2e version (due to staff shortage or due to
% a successor (think positive:-)).
% \changes{v1.0i}{2001/06/04}{Check for old format disabled}
% \changes{v1.0k}{2004/01/28}{Check for old format made 5 years (pr/3601)}
% \changes{v1.0l}{2009/09/24}{Stop checking for old format}
%    \begin{macrocode}
\iffalse
\def\reserved@a#1/#2/#3\@nil{%
  \count@\year
  \advance\count@-#1\relax
  \multiply\count@ by 12\relax
  \advance\count@\month
  \advance\count@-#2\relax}
\expandafter\reserved@a\fmtversion\@nil
%    \end{macrocode}
% |\count@| is now the age of this file in months. Take a generous
% definition of `year' so this message is not generated too often.
%    \begin{macrocode}
\ifnum\count@>65
  \typeout{^^J%
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!^^J%
!  You are attempting to make a LaTeX format from a source file^^J%
!  That is more than five years old.^^J%
!^^J%
!  If you enter <return> to scroll past this message then the format^^J%
!  will be built, but please consider obtaining newer source files^^J%
!  before continuing to build LaTeX.^^J%
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!^^J%
}
   \errhelp{To avoid this error message, obtain new LaTeX sources.}
   \errmessage{LaTeX source files more than 5 years old!}
\fi
\let\reserved@a\relax
\fi
%    \end{macrocode}
%
% \changes{v1.0p}{2015/01/22}{Preserve any \cs{everyjob} material inserted
%   by a loader (\texttt{.ini} file)}
% \changes{v1.0v}{2015/08/23}{Allow negative patchlevel for pre-release}
% \changes{v1.1e}{2020/01/31}{Allow for upcoming format as pre-release 0}
%    \begin{macrocode}
  \ifnum0\ifnum\patch@level=0 \ifx\development@branch@name\@empty 1\fi\fi>0 %
    \everyjob\expandafter{\the\everyjob
      \typeout{\fmtname \space<\fmtversion>}}
    \immediate
    \write16{\fmtname \space<\fmtversion>}
  \else\ifnum\patch@level>0
    \everyjob\expandafter{\the\everyjob
      \typeout{\fmtname \space<\fmtversion> patch level \patch@level}}
    \immediate
    \write16{\fmtname \space<\fmtversion> patch level \patch@level}
  \else
    \everyjob\expandafter{\the\everyjob
      \typeout{\fmtname \space<\fmtversion> pre-release-\number-\patch@level\space
        \ifx\development@branch@name\@undefined  \else
          \ifx\development@branch@name\@empty  \else
            \space (\development@branch@name\space branch)%
          \fi
        \fi
    }}
    \immediate
    \write16{\fmtname \space<\fmtversion> pre-release-\number-\patch@level\space
        \ifx\development@branch@name\@undefined  \else
          \ifx\development@branch@name\@empty  \else
            \space (\development@branch@name\space branch)%
          \fi
        \fi
    }
    \fi
  \fi
%</2ekernel>
%    \end{macrocode}
%
% \begin{macro}{\IncludeInRelease}
% \changes{v1.0w}{2015/02/21}
%         {set \cs{@currname} empty here (in case \cs{IncludeInRelease} input early)}
%    \begin{macrocode}
%<2ekernel>\let\@currname\@empty
%    \end{macrocode}
%
% \changes{v1.0n}{2015/01/07}{macro added}
% \changes{v1.0m}{2015/01/17}{modified with \cs{@currname}}
% \changes{v1.0o}{2015/01/19}{Optional argument}
% \changes{v1.0q}{2015/02/19}{Swap argument order}
%
%    \begin{macrocode}
%<*2ekernel|latexrelease>
%<latexrelease>\newif\if@includeinrelease
%<latexrelease>\@includeinreleasefalse
%    \end{macrocode}
%    \begin{macrocode}
\def\IncludeInRelease#1{%
 \if@includeinrelease
   \PackageError{latexrelease}{mis-matched IncludeInRelease}%
                {There is an \string\EndIncludeRelease\space missing}%
  \@includeinreleasefalse
  \fi
  \kernel@ifnextchar[%
  {\@IncludeInRelease{#1}}
  {\@IncludeInRelease{#1}[#1]}}
%    \end{macrocode}
%
% If a specific date has not been specified in |latexrelease|
% use `|#1|`.
%    \begin{macrocode}
\def\@IncludeInRelease#1[#2]{\@IncludeInRele@se{#2}}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\@IncludeInRele@se#1#2#3{%
  \toks@{[#1] #3}%
  \expandafter\ifx\csname\string#2+\@currname+IIR\endcsname\relax
%    \end{macrocode}
%    If we roll back and the first patch already match then applying
%    that is actually reapplying what is already in the format, i.e.,
%    it is useless and possibly allocating new registers. However, it
%    makes the logic simpler so this is the way it is for now. In
%    theory we could always jump overthe first patch because that is
%    only really needed for rolling forward. So maybe one day \dots
%    \begin{macrocode}
    \ifnum\expandafter\@parse@version#1//00\@nil
          >\expandafter\@parse@version\fmtversion//00\@nil
      \GenericInfo{}{Skipping: \the\toks@}%
     \expandafter\expandafter\expandafter\@gobble@IncludeInRelease
    \else
      \GenericInfo{}{Applying: \the\toks@}%
      \@includeinreleasetrue
      \expandafter\let\csname\string#2+\@currname+IIR\endcsname\@empty
    \fi
  \else
    \GenericInfo{}{Already applied: \the\toks@}%
    \expandafter\@gobble@IncludeInRelease
  \fi
}
%    \end{macrocode}
%
%    \begin{macrocode}
\def\EndIncludeInRelease{%
\if@includeinrelease
  \@includeinreleasefalse
\else
  \PackageError{latexrelease}{mis-matched EndIncludeInRelease}{}%
\fi}
%    \end{macrocode}
%
%    \begin{macrocode}
\long\def\@gobble@IncludeInRelease#1\EndIncludeInRelease{%
  \@includeinreleasefalse
  \@check@IncludeInRelease#1\IncludeInRelease\@check@IncludeInRelease
  \@end@check@IncludeInRelease}
%    \end{macrocode}
%    \begin{macrocode}
\long\def\@check@IncludeInRelease#1\IncludeInRelease
                                   #2#3\@end@check@IncludeInRelease{%
  \ifx\@check@IncludeInRelease#2\else
    \PackageError{latexrelease}{skipped IncludeInRelease for tag \string#2}{}%
  \fi}
%    \end{macrocode}
%
%    \begin{macrocode}
%</2ekernel|latexrelease>
%    \end{macrocode}
% \end{macro}
% \Finale
%
\endinput