summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/latex/filedate/filedate.sty
blob: 5f3e52a77166243316424246d44cc30b3e47e36e (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
\NeedsTeXFormat{LaTeX2e}[1994/12/01]
\ProvidesPackage{filedate}[2012/10/25 v0.3 check file dates (UL)]

%% Copyright (C) 2012 Uwe Lueck,
%% http://www.contact-ednotes.sty.de.vu
%% -- author-maintained in the sense of LPPL below --
%%
%% This file can be redistributed and/or modified under
%% the terms of the LaTeX Project Public License; either
%% version 1.3c of the License, or any later version.
%% The latest version of this license is in
%%     http://www.latex-project.org/lppl.txt
%% We did our best to help you, but there is NO WARRANTY.
%%
%% Please report bugs, problems, and suggestions via
%%
%%   http://www.contact-ednotes.sty.de.vu
%%
%% === The \ctanpkgref{readprov} Package    ===
%% \label{sec:readprov}
% \RequirePackage{readprov}
%% ---is required for \[|\ReadInfoDate{<file>}|\quad 
%% \mbox{and}\quad |\ReadCheckDateOf{<file>}{<date>}|\] 
%% %% <- <date>, \[...\] 2012/10/25
%% % \hyperref[sec:readinfo]{below} 
%% (sections~\ref{sec:readinfo} and \ref{sec:readcheck})
%% % below
%% only. 
%% Please care for providing it on your own if you need that.
%%
%% \pagebreak
%% === Accessing ``Info Date"               ===
%% \label{sec:readinfo}
%% |\theinfodateof{<file>}| will expand to the first ``word" of the 
%% `\Provides'\code{...} entry, provided that has been read before:
\newcommand*{\theinfodateof}[1]{%
    \@ifundefined{ver@#1}{unknown}{%
         \expandafter\expandafter\expandafter
             \fd@firstword\csname ver@#1\endcsname\@gobble{} \@nil}}
\def\fd@firstword#1 #2\@nil{#1}
%% This avoids the `\relax' that `\UseDateOf' from \ctanpkgref{readprov}
%% currently adds (which doesn't harm in printing but is bad for comparing).
%%
%% |\LoadInfoDateOf{<file>}| sets |\theinfodate| to the first word of 
%% what is in the `\Provides' instruction of <file>, provided that info 
%% has been input. So far, you must care for yourself that this works.
%% % The purpose of this kind of actions is to refer to a ``type'' of 
%% % comparisons (with `\CheckDateGiven') for a multiplicity of files.
\newcommand*{\LoadInfoDateOf}[1]{%
    \edef\theinfodate{\theinfodateof{#1}}}
%% |\ReadInfoDateOf{<file>}| additionally inputs the info before:            
\newcommand*{\ReadInfoDateOf}[1]{%
    \ReadFileInfos{#1}\LoadInfoDateOf{#1}}
%% TODO provide automatically.
%%
%% === Accessing \cs{pdffilemoddate}        ===
%% |\pdffilemoddate{<file>}| in the first instance is a \ctanpkgref{pdftex}
%% primitive. With \LuaTeX, \ctanpkgref{pdftexcmds} provides it. 
%% Currently, you must care for this yourself before loading the 
%% present package. I recommend the \ctanpkgref{filemod} documentation for 
%% details about \cs{pdffilemoddate}.
%%
%% Otherwise, (with \XeLaTeX) the modification date may be obtained 
%% by a (shell) script---the next definitions do \emph{not} deal with 
%% the latter situation. Testing against ``today" 
%% (|\rawtoday| in Section~\ref{sec:rawtoday})
%% may be another alternative.
%%
%% |\thepdfmoddateof{<file>}| expands to the modification date 
%% (eight digits separated by two slashes) if `\pdffilemoddate' 
%% is available. Otherwise, we are trying to inform about 
%% unavailability:
\ifx\pdffilemoddate\@undefined
    \newcommand*{\thepdfmoddateof}{%
        \string\pdffilemoddate\space unavailable.}
\else
    \newcommand*{\thepdfmoddateof}[1]{%
        \expandafter \fd@pdftexdate \pdffilemoddate{#1}\@nil}
    \expandafter \def \expandafter
        \fd@pdftexdate\string D:#1#2#3#4#5#6#7#8#9\@nil{%
            #1#2#3#4/#5#6/#7#8}
%% ---cf.~Will \ctanpkgauref{robertson}{Robertson}'s suggestion dating from 2010 on 
%% \httpref{stackoverflow.com/questions/2118972/latex-command-for-last-modified}{%
%% \urlfmt{stackoverflow.com}} in another discussion of accessing modification dates, 
%% including use of scripts.
%% `\string D' deals with the fact that `\pdffilemoddate' returns in ``other" 
%% character tokens.
\fi
%%
%% === \cs{rawtoday}                        ===
%% \label{sec:rawtoday}
%% % Enabling `\CheckDateOf{<file>}{\rawtoday}':
%% |\rawtoday| accesses ``today"'s date as eight digits separated 
%% by two slashes (`yyyy/mm/dd'):
\newcommand*{\rawtoday}{%
    \the\year/\two@digits{\the\month}/\two@digits{\the\day}}
%%
%% === Comparing                            ===
%% \label{sec:readcheck}
%% |\CheckDateOf{<file>}{<date>}| compares <file>'s info date with 
%% <date>:
\newcommand*{\CheckDateOf}[2]{%
%% We provide a check that does not affect the order with \ctanpkgref{myfilist}.
%     \ReadFileInfos{#1}%
%% The date according to `\Provides' will be accessible as |\theinfodate|:
    \LoadInfoDateOf{#1}%
%     \show\theinfodate
    \ReadPDFmodDateOf{#1}%
    \edef\fd@therefdate{#2}%
%     \show\fd@therefdate
    \ifx\theinfodate\fd@therefdate
        \fd@datesequal{#1}%
    \else
        \fd@datesdiff{#1}%
    \fi}
%% |\ReadCheckDateOf{<file>}{<date>}| prepends |\ReadFileInfos{<file>}|
%% from the \ctanpkgref{readprov} package (cf. Section~\ref{sec:readprov}):
\newcommand*{\ReadCheckDateOf}[1]{%
    \ReadFileInfos{#1}\CheckDateOf{#1}}
%% TODO provide automatically.
%% 
%% \pagebreak
%% === Reporting Styles                     ===
%% By default, there is no report about comparisons finding equality.
\let\fd@datesequal\@gobble
%% % We do not want to disturb `\listfiles' with \ctanpkgref{myfilist}. 
%% %% <- rm. 2012/10/25
%% |\EqualityMessages| changes this to screen and log messages: 
\newcommand*{\EqualityMessages}{\let\fd@datesequal\fd@equalmess}
\def\fd@equalmess#1{\message{ + #1 passed date check + }}
\def\fd@errdatesdiff#1{%
    \PackageError{filedate}{%
        \fd@infodate{#1}\fd@refdate}{%      %% \fd@refdate 2012/10/19
        Fix that!}}
%% |\fd@infodate{<file>}| might be used to change the current 
%% presentation of the ``info date:"
\def\fd@infodate#1{% 
    #1 has \string\Provides... date \theinfodate\space}
%% TODO here |\theinfodate| could be replaced by 
%% |\theinfodateof{#1}|, there is no essential application of 
%% `\theinfodate' currently.
%%
%% After |\DatesDiffErrors|, date differences are reportet ``drastically" 
%% by `\PackageError':
\newcommand*{\DatesDiffErrors}{\let\fd@datesdiff\fd@errdatesdiff}
%% This is the default:
\DatesDiffErrors
%% After |\DatesDiffNotices|, date differences are reported by 
%% %% <- told -> reported  2012/10/19
%% `\typeout':
\newcommand*{\DatesDiffNotices}{\let\fd@datesdiff\fd@notedatesdiff}
\def\fd@notedatesdiff#1{\def\MessageBreak{^^J}%   %% added 2012/10/24
                        {\typeout{\fd@infodate{#1}%
                                  \fd@refdate}}}  %% added 2012/10/19
%% v0.7 adds |\DatesDiffWarnings| to get more salient reports of 
%% date differences by `\PackageWarningNoLine':
\newcommand*{\DatesDiffWarnings}{\let\fd@datesdiff\fd@warndatesdiff}
\def\fd@warndatesdiff#1{%
    \PackageWarningNoLine{filedate}%
                         {\fd@infodate{#1}\fd@refdate}}
%% After |\ModDates|, reference dates are called ``modification'' dates: 
\newcommand*{\ModDates}{\let\fd@refdate\fd@moddate}
\def\fd@moddate{\MessageBreak vs. modification date \fd@therefdate}
%% After |\SomeDates|, the type of reference dates is not specified. 
%% This is more accurate when the info date is compared with |\rawtoday|.
\newcommand*{\SomeDates}{\let\fd@refdate\fd@somedate}
\def\fd@somedate{\MessageBreak vs. \fd@therefdate}
%% That's the default:
\SomeDates
%%
%% === Reference Date ``Types"              ===
%% |\ReadPDFmodDateOf{<file>}| enables
%% \[|\CheckDateOf{<file>}{\thepdfmoddate}|\] 
%% by setting |\thepdfmoddate|:
\newcommand*{\ReadPDFmodDateOf}[1]{%
    \edef\thepdfmoddate{\thepdfmoddateof{#1}}}
%% % The purpose of this section is to control the reference date 
%% % without changing commands with <file> arguments. 
%% After a single |\UseReferenceDate{<date>}| all ensuing 
%% \[|\CheckDateOfGiven{<file>}|\] compare 
%% % `\theinfodateof{<file>}'
%% <file>'s ``info date"
%% with 
%% % |\thedategiven|. 
%% <date>.
%% % <date> 
%% The latter 
%% may be an explicit
%% \[<4-digits>/<2-digits>/<2-digits>\quad 
%% (`yyyy/mm/dd')\]---a script might insert it---, 
%% `\rawtoday', or `\thepdfmoddate'.
%% \ctanpkgref{adhocfilelist} v0.7 (with option \strong{\code{-c}}) 
%% is such a script, a shell script generating a ``\TeX\ script", 
%% providing the file modification date according to Unix/Linux.
\newcommand*{\UseReferenceDate}{\def\thedategiven}
\newcommand*{\CheckDateOfGiven}[1]{\CheckDateOf{#1}{\thedategiven}}
%%
%% %%% *** Clarifying Reference Type in Reports ***
%% |\CheckDateOfPDFmod{<file>}| compares the ``info date" 
%% with the modification date according to `\pdffilemoddate', 
%% and in reporting a difference the modification 
%% date it is called a ``modification date" indeed:
\newcommand*{\CheckDateOfPDFmod}[1]{%
    \begingroup
        \ModDates
        \CheckDateOf{#1}{\thepdfmoddate}%
    \endgroup}
%% |\CheckDateOfToday{<file>}| checks if the `\Provides' date is today's, 
%% and the report of a difference somewhat emphasizes that this may not 
%% be a \emph{modification} date. 
%% (It may be a \emph{substitute} for a modification date when you 
%%  know that the file was modified ``today".)
\newcommand*{\CheckDateOfToday}[1]{%
    \begingroup
        \def\fd@refdate{%
            \MessageBreak which is not today}%
        \CheckDateOf{#1}{\rawtoday}%
    \endgroup}
%% 
%%
%% TODO single check commands for comma-separated list of files, 
%% (\ctanpkgref{dowith}) 
%% automatic tests by `\ReadFileInfos' etc. (\ctanpkgref{fileinfo}).
%%
%% === Leaving the Package File ===
\endinput
%%
%% === VERSION HISTORY ===

v0.1   2012/10/15   core try, bad
v0.2   2012/10/16   code for first release 
       2012/10/17   reordering, correcting documentation
v0.21  2012/10/19   \fd@datekind\@tempb -> \fd@refdate,
                    \fd@refdate with \DatesDiffNotices! (bug)
                    \@tempb -> \fd@therefdate; doc. mod.s
v0.3   2012/10/24   \MessageBreak fix, \DatesDiffWarnings
       2012/10/25   doc.: add <date> in sec:readprov, 
                    rm. remark on \fd@datesequal, 
                    mod. text on \DatesDiffWarnings,
                    -- -> --- before `a script might'