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diff --git a/src/utils/grog/grog.1.man b/src/utils/grog/grog.1.man new file mode 100644 index 0000000..efcd728 --- /dev/null +++ b/src/utils/grog/grog.1.man @@ -0,0 +1,628 @@ +.TH grog @MAN1EXT@ "@MDATE@" "groff @VERSION@" +.SH Name +grog \- \(lqgroff guess\(rq\(eminfer the +.I groff +command a document requires +. +. +.\" ==================================================================== +.\" Legal Terms +.\" ==================================================================== +.\" +.\" Copyright (C) 1989-2021 Free Software Foundation, Inc. +.\" +.\" This file is part of grog, which is part of groff, a free software +.\" project. You can redistribute it and/or modify it under the terms +.\" of the GNU General Public License version 2 (GPL2) as published by +.\" the Free Software Foundation. +.\" +.\" groff 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. +.\" +.\" The text for GPL2 is available in the internet at +.\" <http://www.gnu.org/licenses/gpl2.0.txt>. +. +. +.\" Save and disable compatibility mode (for, e.g., Solaris 10/11). +.do nr *groff_grog_1_man_C \n[.cp] +.cp 0 +. +.\" Define fallback for groff 1.23's MR macro if the system lacks it. +.nr do-fallback 0 +.if !\n(.f .nr do-fallback 1 \" mandoc +.if \n(.g .if !d MR .nr do-fallback 1 \" older groff +.if !\n(.g .nr do-fallback 1 \" non-groff *roff +.if \n[do-fallback] \{\ +. de MR +. ie \\n(.$=1 \ +. I \%\\$1 +. el \ +. IR \%\\$1 (\\$2)\\$3 +. . +.\} +.rr do-fallback +. +. +.\" ==================================================================== +.SH Synopsis +.\" ==================================================================== +. +.SY grog +.RB [ \-\-run ] +.RB [ \-\-ligatures ] +.RI [ groff-option\~ .\|.\|.\&] +.RB [ \-\- ] +.RI [ file\~ .\|.\|.] +.YS +. +. +.SY grog +.B \-h +. +.SY grog +.B \-\-help +.YS +. +. +.SY grog +.B \-v +. +.SY grog +.B \-\-version +.YS +. +. +.\" ==================================================================== +.SH Description +.\" ==================================================================== +. +.I grog +reads its input +and guesses which +.MR groff @MAN1EXT@ +options are needed to render it. +. +If no operands are given, +or if +.I file +is +.RB \[lq] \- \[rq], +.I grog +reads the standard input stream. +. +The corresponding +.I groff +command is normally written to the standard output stream. +. +With the option +.BR \-\-run , +the inferred command is written to the standard error stream and then +executed. +. +. +.\" ==================================================================== +.SH Options +.\" ==================================================================== +. +.B \-h +and +.B \-\-help +display a usage message, +whereas +.B \-v +and +.B \-\-version +display version information; +all exit afterward. +. +. +.TP +.B \-\-ligatures +includes the arguments +.B \-P\-y \-PU +in the inferred +.I groff +command. +. +These are supported only by the +.B pdf +output device. +. +. +.TP +.B \-\-run +writes the inferred command to the standard error stream and then +executes it. +. +. +.P +All other specified short options +(that is, +arguments beginning with a minus sign +.RB \[lq] \- \[rq] +followed by a letter) +are interpreted as +.I groff +options or option clusters with or without an option argument. +. +Such options are included in the constructed +.I groff +command line. +. +. +.\" ==================================================================== +.SH Details +.\" ==================================================================== +. +.I grog +reads each +.I file +operand, +pattern-matching strings that are statistically likely to be +characteristic of +.MR roff @MAN7EXT@ +documents. +. +It tries to guess which of the following +.I groff +options are required to correctly render the input: +.BR \-e , +.BR \-g , +.BR \-G , +.BR \-j , +.\" gideal is not implemented yet. +.\" .BR \-J , +.BR \-p , +.BR \-R , +.\".BR \-s , +.B \-t +(preprocessors); +and +.BR \-man , +.BR \-mdoc , +.BR \-mdoc\-old , +.BR \-me , +.BR \-mm , +.BR \-mom , +and +.B \-ms +(macro packages). +. +The inferred +.I groff +command including these options and any +.I file +parameters is written to the standard output stream. +. +. +.P +It is possible to specify arbitrary +.I groff +options on the command line. +. +These are included in the inferred command without change. +. +Choices of +.I groff +options include +.B \-C +to enable AT&T +.I troff +compatibility mode and +.B \-T +to select a non-default output device. +. +If the input is not encoded in US-ASCII, +ISO 8859-1, +or IBM code page 1047, +specification of a +.I groff +option to run the +.MR preconv @MAN1EXT@ +preprocessor is advised; +see the +.BR \-D , +.BR \-k , +and +.B \-K +options of +.MR groff @MAN1EXT@ . +. +For UTF-8 input, +.B \-k +is a good choice. +. +. +.P +.I groff +may issue diagnostic messages when an inappropriate +.B \-m +option, +or multiple conflicting ones, +are specified. +. +Consequently, +it is best to specify no +.B \-m +options to +.I grog +unless it cannot correctly infer all of the +.B \-m +arguments a document requires. +. +A +.I roff +document can also be written without recourse to any macro package. +. +In such cases, +.I grog +will infer a +.I groff +command without an +.B \-m +option. +. +. +.\" ==================================================================== +.SS Limitations +.\" ==================================================================== +. +.I grog +presumes that the input does not change the escape, +control, +or no-break control characters. +. +.I grog +does not parse +.I roff +input line continuation or control structures +(brace escape sequences and the +.RB \[lq] if \[rq], +.RB \[lq] ie \[rq], +and +.RB \[lq] el \[rq] +requests) +nor +.IR groff 's +.RB \[lq] while \[rq]. +. +Thus the input +. +.RS +.EX +\&.if \[rs] +t .NH 1 +\&.if n .SH +Introduction +.EE +.RE +. +will conceal the use of the +.I ms +macros +.B NH +and +.B SH +from +.IR grog . +. +Such constructions are regarded by +.IR grog 's +implementors as insufficiently common to cause many inference problems. +. +Preprocessors can be even stricter when matching macro calls that +bracket the regions of an input file they replace. +. +.IR pic , +for example, +requires +.BR PS , +.BR PE , +and +.B PF +calls to immediately follow the default control character at the +beginning of a line. +. +. +.P +Detection of the +.B \-s +option +(the +.MR @g@soelim @MAN1EXT@ +preprocessor) +is tricky; +to correctly infer its necessity would require +.I grog +to recursively open all files given as arguments to the +.B .so +request under the same conditions that +.I @g@soelim +itself does so; +see its man page. +. +Recall that +.I @g@soelim +is necessary only if sourced files need to be preprocessed. +. +Therefore, +as a workaround, +you may want to run the input through +.I @g@soelim +manually, +piping it to +.IR grog , +and compare the output to running +.I grog +on the input directly. +. +If the +.RI \[lq] @g@soelim \[rq]ed +input causes +.I grog +to infer additional preprocessor options, +then +.B \-s +is likely necessary. +. +. +.RS +.P +.EX +$ \c +.B printf \[dq].TS\[rs]nl.\[rs]nI\[aq]m a table.\[rs]n.TE\[rs]n\[dq] > \ +3.roff +$ \c +.B printf \[dq].so 3.roff\[rs]n\[dq] > 2.roff +$ \c +.B printf \[dq].XP\[rs]n.so 2.roff\[rs]n\[dq] > 1.roff +$ \c +.B grog 1.roff +groff \-ms 1.roff +$ \c +.B @g@soelim 1.roff | grog +groff \-t \-ms \- +.EE +.RE +. +. +.P +In the foregoing example, +we see that this procedure enabled +.I grog +to detect +.MR @g@tbl @MAN1EXT@ +macros, +so we would add +.B \-s +as well as the detected +.B \-t +option to a revised +.I grog +or +.I groff +command. +. +. +.RS +.P +.EX +$ \c +.B grog \-st 1.roff +groff \-st \-ms 1.roff +.EE +.RE +. +. +.\" ==================================================================== +.SH "Exit status" +.\" ==================================================================== +. +.I grog +exits with error status +.B 1 +if a macro package appears to be in use by the input document, +but +.I grog +was unable to infer which one, +or +.B 2 +if there were problems handling an option or operand. +. +It otherwise exits with status +.BR 0 . +. +(If the +.B \-\-run +option is specified, +.IR groff 's +exit status is discarded.) +. +Inferring no preprocessors or macro packages is not an error condition; +a valid +.I roff +document need not use either. +. +Even plain text is valid input, +if one is mindful of the syntax of the control and escape characters. +. +. +.\" ==================================================================== +.SH Examples +.\" ==================================================================== +. +Running +. +.RS +.EX +.B grog @DOCDIR@/meintro.me +.EE +.RE +at the command line results in +.RS +.EX +groff \-me @DOCDIR@/meintro.me +.EE +.RE +. +because +.I grog +recognizes that the file +.I meintro.me +is written using macros from the +.I me +package. +. +The command +. +.RS +.EX +.B grog @DOCDIR@/pic.ms +.EE +.RE +. +outputs +. +.RS +.EX +groff \-e \-p \-t \-ms @DOCDIR@/pic.ms +.EE +.RE +. +on the other hand. +. +Besides discerning the +.I ms +macro package, +.I grog +recognizes that the file +.I pic.ms +additionally needs the combination of +.B \-t +for +.IR tbl , +.B \-e +for +.IR eqn , +and +.B \-p +for +.IR pic . +. +. +.\" XXX: grog no longer (June 2021) attempts to detect this scenario. +.\" It's also not a practical one; full-service macro packages don't +.\" generally support being "unloaded" for subsequent processing of +.\" another document using a different one. We do achieve it, with +.\" care, in groff with man(7) and mdoc(7) (see andoc.tmac). +.\" .P +.\" If both of the former example files are combined in the command +.\" . +.\" .RS +.\" .EX +.\" .B grog meintro.me pic.ms +.\" .EE +.\" .RE +.\" . +.\" a diagnostic message is sent to the standard error stream because +.\" some macro packages cannot be combined. +.\" . +.\" Nevertheless the corresponding output with the wrong options is +.\" written to standard output: +.\" . +.\" .RS +.\" .EX +.\" groff \-t \-e \-p \-ms meintro.me pic.ms +.\" .EE +.\" .RE +.\" . +.\" and +.\" .I grog +.\" terminates with an error exit status. +. +. +.P +Consider a file +.IR \%doc/\:\%grnexampl.me , +which uses the +.I @g@grn +preprocessor to include a +.MR gremlin 1 +picture file in an +.I me \" generic +document. +. +Let's say we want to suppress color output, +produce a DVI file, +and get backtraces for any errors that +.I @g@troff +encounters. +. +The command +. +.RS +.EX +.B grog \-bc \-Idoc \-Tdvi doc/grnexmpl.me +.EE +.RE +. +is processed by +.I grog +into +. +.RS +.EX +groff \-bc \-Idoc \-Tdvi \-e \-g \-me doc/grnexmpl.me +.EE +.RE +. +where we can see that +.I grog +has inferred the +.I me \" generic +macro package along with the +.I eqn \" generic +and +.I grn \" generic +preprocessors. +. +(The input file is located in +.I @DOCDIR@ +if you'd like to try this example yourself.) +. +. +.\" ==================================================================== +.SH Authors +.\" ==================================================================== +. +.I grog +was originally written in Bourne shell by James Clark. +. +The current implementation in Perl was written by +.MT groff\-bernd\:.warken\-72@\:web\:.de +Bernd Warken +.ME +and heavily revised by +.MT g.branden\:.robinson@\:gmail\:.com +G.\& Branden Robinson +.ME . +. +. +.\" ==================================================================== +.SH "See also" +.\" ==================================================================== +. +.MR groff @MAN1EXT@ +. +. +.\" Restore compatibility mode (for, e.g., Solaris 10/11). +.cp \n[*groff_grog_1_man_C] +.do rr *groff_grog_1_man_C +. +. +.\" Local Variables: +.\" fill-column: 72 +.\" mode: nroff +.\" End: +.\" vim: set filetype=groff textwidth=72: |