path: root/Master/texmf-dist/doc/man/man1/texfot.1

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.\" ========================================================================
.\"
.IX Title "TEXFOT 1"
.TH TEXFOT 1 "2022-09-24" "texfot" "Karl Berry"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
texfot \- run TeX, filtering online transcript for interesting messages
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
texfot [\fIoption\fR]... \fItexcmd\fR [\fItexarg\fR...]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`texfot\*(C'\fR invokes \fItexcmd\fR with the given \fItexarg\fR arguments,
filtering the online output for ``interesting'' messages. Its exit
value is that of \fItexcmd\fR. Examples:
.PP
.Vb 2
\&  # Sample basic invocation:
\&  texfot pdflatex file.tex
\&  
\&  # Ordinarily the full output is copied to /tmp/fot.$UID before
\&  # filtering, but that can be omitted, or the filename changed:
\&  texfot \-\-tee=/dev/null lualatex file.tex
\&  
\&  # Example of more complex engine invocation:
\&  texfot xelatex \-\-recorder \*(Aq\enonstopmode\einput file\*(Aq
.Ve
.PP
Here is an example of what the output looks like (in its entirety) on an
error-free run:
.PP
.Vb 3
\&  /path/to/texfot: invoking: pdflatex hello.ltx
\&  This is pdfTeX, Version 3.141592653\-2.6\-1.40.24 (TeX Live 2022) (preloaded format=pdflatex)
\&  Output written on hello.pdf (1 page, 94415 bytes).
.Ve
.PP
Aside from its own options, described below, \f(CW\*(C`texfot\*(C'\fR just runs the
given command with the given arguments (same approach to command line
syntax as \f(CW\*(C`env\*(C'\fR, \f(CW\*(C`nice\*(C'\fR, \f(CW\*(C`timeout\*(C'\fR, etc.). Thus, \f(CW\*(C`texfot\*(C'\fR works with
any engine and any command line options.
.PP
\&\f(CW\*(C`texfot\*(C'\fR does not look at the log file or any other possible output
file(s); it only looks at the standard output and standard error from
the command. stdout is processed first, then stderr. Lines from stderr
have an identifying prefix. \f(CW\*(C`texfot\*(C'\fR writes all accepted lines to its
stdout.
.PP
The messages shown are intended to be those which likely need action by
the author: error messages, overfull and underfull boxes, undefined
citations, missing characters from fonts, etc.
.SH "FLOW OF OPERATION"
.IX Header "FLOW OF OPERATION"
Here is the order in which lines of output are checked:
.IP "1." 4
If the ``next line'' needs to be printed (see below), print it.
.IP "2." 4
Otherwise, if the line matches any user-supplied list of regexps to
accept (given with \f(CW\*(C`\-\-accept\*(C'\fR, see below), in that order, print it.
.IP "3." 4
Otherwise, if the line matches the built-in list of regexps to ignore,
or any user-supplied list of regexps to ignore (given with \f(CW\*(C`\-\-ignore\*(C'\fR,
see below), in that order, ignore it.
.IP "4." 4
Otherwise, if the line matches the list of regexps for which the next
line (two lines in all) should be shown, show this line and set the
``next line'' flag for the next time around the loop. Examples are the
common \f(CW\*(C`!\*(C'\fR and \f(CW\*(C`filename:lineno:\*(C'\fR error messages, which are generally
followed by a line with specific detail about the error.
.IP "5." 4
Otherwise, if the line matches the list of regexps to show, show it.
.IP "6." 4
Otherwise, the default: if the line came from stdout, ignore it; if the
line came from stderr, print it (to stdout). This distinction is made
because TeX engines write relatively few messages to stderr, and it's
likely that any such should be considered.
.PP
Once a particular check matches, the program moves on to process the
next line.
.PP
Don't hesitate to peruse the source to the script, which is essentially
a straightforward loop matching against the different lists as above.
You can see the exact regexps being matched in the different categories
in the source.
.PP
Incidentally, although nothing in this basic operation is specific to
TeX engines, all the regular expressions included in the program are
specific to TeX. So in practice the program isn't useful except with TeX
engines, although it would be easy enough to adapt it (if there was
anything else as verbose as TeX to make that useful).
.SH "OPTIONS"
.IX Header "OPTIONS"
The following are the options to \f(CW\*(C`texfot\*(C'\fR itself (not the TeX engine
being invoked; consult the TeX documentation or the engine's \f(CW\*(C`\-\-help\*(C'\fR
output for that).
.PP
The first non-option terminates \f(CW\*(C`texfot\*(C'\fR's option parsing, and the
remainder of the command line is invoked as the TeX command, without
further parsing. For example, \f(CW\*(C`texfot \-\-debug tex
\&\-\-debug\*(C'\fR will output debugging information from both \f(CW\*(C`texfot\*(C'\fR and
\&\f(CW\*(C`tex\*(C'\fR.
.PP
Options may start with either \- or \-\-, and may be unambiguously
abbreviated. It is best to use the full option name in scripts, though,
to avoid possible collisions with new options in the future.
.ie n .IP """\-\-accept"" \fIregexp\fR" 4
.el .IP "\f(CW\-\-accept\fR \fIregexp\fR" 4
.IX Item "--accept regexp"
Accept lines in the TeX output matching (Perl) \fIregexp\fR. Can be
repeated. This list is checked first, so any and all matches will be
shown, regardless of other options. These regexps are not automatically
anchored (or otherwise altered), simply used as-is.
.ie n .IP """\-\-debug""" 4
.el .IP "\f(CW\-\-debug\fR" 4
.IX Item "--debug"
.PD 0
.ie n .IP """\-\-no\-debug""" 4
.el .IP "\f(CW\-\-no\-debug\fR" 4
.IX Item "--no-debug"
.PD
Output (or not) what the program is doing to standard error; off by default.
.ie n .IP """\-\-ignore"" \fIregexp\fR" 4
.el .IP "\f(CW\-\-ignore\fR \fIregexp\fR" 4
.IX Item "--ignore regexp"
Ignore lines in the TeX output matching (Perl) \fIregexp\fR. Can be
repeated. Adds to the default set of ignore regexps rather than
replacing. Like the acceptance regexps, these are not automatically
anchored (or otherwise altered).
.ie n .IP """\-\-interactive""" 4
.el .IP "\f(CW\-\-interactive\fR" 4
.IX Item "--interactive"
.PD 0
.ie n .IP """\-\-no\-interactive""" 4
.el .IP "\f(CW\-\-no\-interactive\fR" 4
.IX Item "--no-interactive"
.PD
By default, standard input to the TeX process is closed so that TeX's
interactive mode (waiting for input upon error, the \f(CW\*(C`*\*(C'\fR prompt, etc.)
is never entered. Giving \f(CW\*(C`\-\-interactive\*(C'\fR allows interaction to happen.
.ie n .IP """\-\-quiet""" 4
.el .IP "\f(CW\-\-quiet\fR" 4
.IX Item "--quiet"
.PD 0
.ie n .IP """\-\-no\-quiet""" 4
.el .IP "\f(CW\-\-no\-quiet\fR" 4
.IX Item "--no-quiet"
.PD
By default, the TeX command being invoked is reported on standard
output. \f(CW\*(C`\-\-quiet\*(C'\fR omits that reporting. To get a completely silent run,
redirect standard output: \f(CW\*(C`texfot\ ...\ >/dev/null\*(C'\fR. (The only
messages to standard error should be errors from \f(CW\*(C`texfot\*(C'\fR itself, so it
shouldn't be necessary to redirect that, but of course that can be done
as well.)
.ie n .IP """\-\-stderr""" 4
.el .IP "\f(CW\-\-stderr\fR" 4
.IX Item "--stderr"
.PD 0
.ie n .IP """\-\-no\-stderr""" 4
.el .IP "\f(CW\-\-no\-stderr\fR" 4
.IX Item "--no-stderr"
.PD
The default is for \f(CW\*(C`texfot\*(C'\fR to report everything written to stderr by
the TeX command (on stdout). \f(CW\*(C`\-\-no\-stderr\*(C'\fR omits that reporting. (Some
programs, \f(CW\*(C`dvisvgm\*(C'\fR is one, can be rather verbose on stderr.)
.ie n .IP """\-\-tee"" \fIfile\fR" 4
.el .IP "\f(CW\-\-tee\fR \fIfile\fR" 4
.IX Item "--tee file"
By default, the output being filtered is \f(CW\*(C`tee\*(C'\fR\-ed, before filtering, to
make it easy to check the full output in case of problems.
.Sp
The default \fIfile\fR is \f(CW\*(C`$TMPDIR/fot.\*(C'\fR\fIuid\fR; if \f(CW\*(C`TMPDIR\*(C'\fR is not set,
\&\f(CW\*(C`TMP\*(C'\fR is used if set; if neither is set, the default directory is
\&\f(CW\*(C`/tmp\*(C'\fR. For example: \f(CW\*(C`/tmp/fot.1001\*(C'\fR. The \fIuid\fR suffix is the
effective userid of the process, appended for basic avoidance of
collisions between different users on the same system.
.Sp
This option allows specifying a different file. Use \f(CW\*(C`\-\-tee\ /dev/null\*(C'\fR to discard the original output.
.ie n .IP """\-\-version""" 4
.el .IP "\f(CW\-\-version\fR" 4
.IX Item "--version"
Output version information and exit successfully.
.ie n .IP """\-\-help""" 4
.el .IP "\f(CW\-\-help\fR" 4
.IX Item "--help"
Display this help and exit successfully.
.SH "RATIONALE"
.IX Header "RATIONALE"
I wrote this because, in my work as a TUGboat editor
(<https://tug.org/TUGboat>, journal submissions always welcome!), I run
and rerun many documents, many times each. It was easy to lose warnings
I needed to see in the mass of unvarying and uninteresting output from
TeX, such as style files being read and fonts being used. I wanted to
see all and only those messages which needed some action by me.
.PP
I found some other programs of a similar nature, the LaTeX package
\&\f(CW\*(C`silence\*(C'\fR, and plenty of other (La)TeX wrappers, but it seemed none of
them did what I wanted. Either they read the log file (I wanted to look
at only the online output), or they output more or less than I wanted,
or they required invoking TeX differently (I wanted to keep my build
process exactly the same, most critically the TeX invocation, which can
get complicated). Hence I wrote this little script.
.PP
Here are some keywords if you want to explore other options:
texloganalyser, pydflatex, logfilter, latexmk, rubber, arara, and
searching for \f(CW\*(C`log\*(C'\fR at <https://ctan.org/search>.
.PP
\&\f(CW\*(C`texfot\*(C'\fR is written in Perl, and runs on Unix. It may work on Windows
if Perl and other software is installed, but I don't use Windows and
don't support \f(CW\*(C`texfot\*(C'\fR there.
.PP
The name comes from the \f(CW\*(C`trip.fot\*(C'\fR and \f(CW\*(C`trap.fot\*(C'\fR files that are part
of Knuth's trip and trap torture tests, which record the online output
from the programs. I am not sure what \*(L"fot\*(R" stands for in trip and trap,
but I can pretend that it stands for \*(L"filter online transcript\*(R" in the
present case\ :).
.SH "AUTHORS AND COPYRIGHT"
.IX Header "AUTHORS AND COPYRIGHT"
This script and its documentation were written by Karl Berry and both
are released to the public domain. Email \f(CW\*(C`karl@freefriends.org\*(C'\fR with
bug reports. It has no home page beyond the package page on \s-1CTAN:\s0
<https://ctan.org/pkg/texfot>.
.PP
.Vb 1
\&  $Id: texfot,v 1.47 2022/09/24 16:38:13 karl Exp $
.Ve