code.delx.au - gnu-emacs/blob - etc/etags.1

   1 .\" Copyright (c) 1992, 2001 Free Software Foundation
   2 .\" See section COPYING for conditions for redistribution
   3 .TH etags 1 "23nov2001" "GNU Tools" "GNU Tools"
   4 .de BP
   5 .sp
   6 .ti -.2i
   7 \(**
   8 ..
   9
  10 .SH NAME
  11 etags, ctags \- generate tag file for Emacs, vi
  12 .SH SYNOPSIS
  13 .hy 0
  14 .na
  15 \fBetags\fP [\|\-aCDGImRVh\|] [\|\-i \fIfile\fP\|] [\|\-l \fIlanguage\fP\|]
  16 .if n .br
  17 [\|\-o \fItagfile\fP\|] [\|\-r \fIregexp\fP\|]
  18 .br
  19 [\|\-\-append\|] [\|\-\-no\-defines\|]
  20 [\|\-\-no\-globals\|] [\|\-\-include=\fIfile\fP\|]
  21 [\|\-\-ignore\-indentation\|] [\|\-\-language=\fIlanguage\fP\|]
  22 [\|\-\-members\|] [\|\-\-output=\fItagfile\fP\|]
  23 [\|\-\-regex=\fIregexp\fP\|] [\|\-\-no\-regex\|]
  24 [\|\-\-ignore\-case\-regex=\fIregexp\fP\|]
  25 [\|\-\-help\|] [\|\-\-version\|]
  26 \fIfile\fP .\|.\|.
  27
  28 \fBctags\fP [\|\-aCdgImRVh\|] [\|\-BtTuvwx\|] [\|\-l \fIlanguage\fP\|]
  29 .if n .br
  30 [\|\-o \fItagfile\fP\|] [\|\-r \fIregexp\fP\|]
  31 .br
  32 [\|\-\-append\|] [\|\-\-backward\-search\|]
  33 [\|\-\-cxref\|] [\|\-\-defines\|] [\|\-\-forward\-search\|]
  34 [\|\-\-globals\|] [\|\-\-ignore\-indentation\|]
  35 [\|\-\-language=\fIlanguage\fP\|] [\|\-\-members\|]
  36 [\|\-\-output=\fItagfile\fP\|] [\|\-\-regex=\fIregexp\fP\|]
  37 [\|\-\-ignore\-case\-regex=\fIregexp\fP\|]
  38 [\|\-\-typedefs\|] [\|\-\-typedefs\-and\-c++\|]
  39 [\|\-\-update\|] [\|\-\-no\-warn\|]
  40 [\|\-\-help\|] [\|\-\-version\|]
  41 \fIfile\fP .\|.\|.
  42 .ad b
  43 .hy 1
  44 .SH DESCRIPTION
  45 The \|\fBetags\fP\| program is used to create a tag table file, in a format
  46 understood by
  47 .BR emacs ( 1 )\c
  48 \&; the \|\fBctags\fP\| program is used to create a similar table in a
  49 format understood by
  50 .BR vi ( 1 )\c
  51 \&.  Both forms of the program understand
  52 the syntax of C, Objective C, C++, Java, Fortran, Ada, Cobol, Erlang,
  53 LaTeX, Emacs Lisp/Common Lisp, makefiles, Pascal, Perl, PHP, Postscript,
  54 Python, Prolog, Scheme and
  55 most assembler\-like syntaxes.
  56 Both forms read the files specified on the command line, and write a tag
  57 table (defaults: \fBTAGS\fP for \fBetags\fP, \fBtags\fP for
  58 \fBctags\fP) in the current working directory.
  59 Files specified with relative file names will be recorded in the tag
  60 table with file names relative to the directory where the tag table
  61 resides.  Files specified with absolute file names will be recorded
  62 with absolute file names.
  63 The programs recognize the language used in an input file based on its
  64 file name and contents.  The \fB\-\-language\fP switch can be used to force
  65 parsing of the file names following the switch according to the given
  66 language, overriding guesses based on filename extensions.
  67 .SH OPTIONS
  68 Some options make sense only for the \fBvi\fP style tag files produced
  69 by ctags;
  70 \fBetags\fP does not recognize them.
  71 The programs accept unambiguous abbreviations for long option names.
  72 .TP
  73 .B \-a, \-\-append
  74 Append to existing tag file.  (For \fBvi\fP-format tag files, see also
  75 \fB\-\-update\fP.)
  76 .TP
  77 .B \-B, \-\-backward\-search
  78 Tag files written in the format expected by \fBvi\fP contain regular
  79 expression search instructions; the \fB\-B\fP option writes them using
  80 the delimiter `\|\fB?\fP\|', to search \fIbackwards\fP through files.
  81 The default is to use the delimiter `\|\fB/\fP\|', to search \fIforwards\fP
  82 through files.
  83 Only \fBctags\fP accepts this option.
  84 .TP
  85 .B \-\-declarations
  86 In C and derived languages, create tags for function declarations,
  87 and create tags for extern variables unless \-\-no\-globals is used.
  88 .TP
  89 .B \-d, \-\-defines
  90 Create tag entries for C preprocessor constant definitions
  91 and enum constants, too.  This is the
  92 default behavior for \fBetags\fP.
  93 .TP
  94 .B \-D, \-\-no\-defines
  95 Do not create tag entries for C preprocessor constant definitions
  96 and enum constants.
  97 This may make the tags file much smaller if many header files are tagged.
  98 This is the default behavior for \fBctags\fP.
  99 .TP
 100 .B \-g, \-\-globals
 101 Create tag entries for global variables in C, C++, Objective C, Java,
 102 and Perl.
 103 This is the default behavior for \fBetags\fP.
 104 .TP
 105 .B \-G, \-\-no\-globals
 106 Do not tag global variables.  Typically this reduces the file size by
 107 one fourth.  This is the default behavior for \fBctags\fP.
 108 .TP
 109 \fB\-i\fP \fIfile\fP, \fB\-\-include=\fIfile\fP
 110 Include a note in the tag file indicating that, when searching for a
 111 tag, one should also consult the tags file \fIfile\fP after checking the
 112 current file.  This options is only accepted by \fBetags\fP.
 113 .TP
 114 .B \-I, \-\-ignore\-indentation
 115 Don't rely on indentation as much as we normally do.  Currently, this
 116 means not to assume that a closing brace in the first column is the
 117 final brace of a function or structure definition in C and C++.
 118 .TP
 119 \fB\-l\fP \fIlanguage\fP, \fB\-\-language=\fIlanguage\fP
 120 Parse the following files according to the given language.  More than
 121 one such options may be intermixed with filenames.  Use \fB\-\-help\fP
 122 to get a list of the available languages and their default filename
 123 extensions.  The `auto' language can be used to restore automatic
 124 detection of language based on the file name.  The `none'
 125 language may be used to disable language parsing altogether; only
 126 regexp matching is done in this case (see the \fB\-\-regex\fP option).
 127 .TP
 128 .B \-m, \-\-members
 129 Create tag entries for variables that are members of structure-like
 130 constructs in C++, Objective C, Java.
 131 .TP
 132 .B \-M, \-\-no\-members
 133 Do not tag member variables.  This is the default behavior.
 134 .TP
 135 .B \-\-packages\-only
 136 Only tag packages in Ada files.
 137 .TP
 138 \fB\-o\fP \fItagfile\fP, \fB\-\-output=\fItagfile\fP
 139 Explicit name of file for tag table; overrides default \fBTAGS\fP or
 140 \fBtags\fP.   (But ignored with \fB\-v\fP or \fB\-x\fP.)
 141 .TP
 142 \fB\-r\fP \fIregexp\fP, \fB\-\-regex=\fIregexp\fP
 143 .TP
 144 \fB\-\-ignore\-case\-regex=\fIregexp\fP
 145 Make tags based on regexp matching for each line of the files
 146 following this option, in addition to the tags made with the standard
 147 parsing based on language.  When using \fB\-\-regex\fP, case is
 148 significant, while it is not with \fB\-\-ignore\-case\-regex\fP. May
 149 be freely intermixed with filenames and the \fB\-R\fP option.  The
 150 regexps are cumulative, i.e. each option will add to the previous
 151 ones.  The regexps are of the form:
 152 .br
 153         \fB/\fP\fItagregexp\fP[\fB/\fP\fInameregexp\fP]\fB/\fP
 154 .br
 155
 156 where \fItagregexp\fP is used to match the lines that must be tagged.
 157 It should not match useless characters.  If the match is
 158 such that more characters than needed are unavoidably matched by
 159 \fItagregexp\fP, it may be useful to add a \fInameregexp\fP, to
 160 narrow down the tag scope.  \fBctags\fP ignores regexps without a
 161 \fInameregexp\fP.  The syntax of regexps is the same as in emacs.
 162 .br
 163 Here are some examples.  All the regexps are quoted to protect them
 164 from shell interpretation.
 165 .br
 166
 167 Tag the DEFVAR macros in the emacs source files:
 168 .br
 169 \fI\-\-regex\='/[ \\t]*DEFVAR_[A-Z_ \\t(]+"\\([^"]+\\)"\/'\fP
 170 .\"" This comment is to avoid confusion to Emacs syntax highlighting
 171 .br
 172
 173 Tag VHDL files (this example is a single long line, broken here for
 174 formatting reasons):
 175 .br
 176 \fI\-\-language\=none\ \-\-regex='/[\ \\t]*\\(ARCHITECTURE\\|\\
 177 CONFIGURATION\\)\ +[^\ ]*\ +OF/'\ \-\-regex\='/[\ \\t]*\\
 178 \\(ATTRIBUTE\\|ENTITY\\|FUNCTION\\|PACKAGE\\(\ BODY\\)?\\
 179 \\|PROCEDURE\\|PROCESS\\|TYPE\\)[\ \\t]+\\([^\ \\t(]+\\)/\\3/'\fP
 180 .br
 181
 182 Tag TCL files (this last example shows the usage of a \fItagregexp\fP):
 183 .br
 184 \fI\-\-lang\=none \-\-regex\='/proc[\ \\t]+\\([^\ \\t]+\\)/\\1/'\fP
 185
 186 .br
 187 A regexp can be preceded by {\fIlang\fP}, thus restricting it to match
 188 lines of files of the specified language.  Use \fBetags --help\fP to obtain
 189 a list of the recognised languages.  This feature is particularly useful inside
 190 \fBregex files\fP.  A regex file contains one regex per line.  Empty lines,
 191 and those lines beginning with space or tab are ignored.  Lines beginning
 192 with @ are references to regex files whose name follows the @ sign.  Other
 193 lines are considered regular expressions like those following \fB\-\-regex\fP.
 194 .br
 195 For example, the command
 196 .br
 197 \fIetags \-\-regex=@regex.file *.c\fP
 198 .br
 199 reads the regexes contained in the file regex.file.
 200 .TP
 201 .B \-R, \-\-no\-regex
 202 Don't do any more regexp matching on the following files.  May be
 203 freely intermixed with filenames and the \fB\-\-regex\fP option.
 204 .TP
 205 .B \-t, \-\-typedefs
 206 Record typedefs in C code as tags.  Since this is the default behaviour
 207 of \fBetags\fP, only \fBctags\fP accepts this option.
 208 .TP
 209 .B \-T, \-\-typedefs\-and\-c++
 210 Generate tag entries for typedefs, struct, enum, and union tags, and
 211 C++ member functions.  Since this is the default behaviour
 212 of \fBetags\fP, only \fBctags\fP accepts this option.
 213 .TP
 214 .B \-u, \-\-update
 215 Update tag entries for \fIfiles\fP specified on command line, leaving
 216 tag entries for other files in place.  Currently, this is implemented
 217 by deleting the existing entries for the given files and then
 218 rewriting the new entries at the end of the tags file.  It is often
 219 faster to simply rebuild the entire tag file than to use this.
 220 Only \fBctags\fP accepts this option.
 221 .TP
 222 .B \-v, \-\-vgrind
 223 Instead of generating a tag file, write index (in \fBvgrind\fP format)
 224 to standard output.  Only \fBctags\fP accepts this option.
 225 .TP
 226 .B \-w, \-\-no\-warn
 227 Suppress warning messages about duplicate entries.  The \fBetags\fP
 228 program does not check for duplicate entries, so this option is not
 229 allowed with it.
 230 .TP
 231 .B \-x, \-\-cxref
 232 Instead of generating a tag file, write a cross reference (in
 233 \fBcxref\fP format) to standard output.  Only \fBctags\fP accepts this option.
 234 .TP
 235 .B \-h, \-H, \-\-help
 236 Print usage information.
 237 .TP
 238 .B \-V, \-\-version
 239 Print the current version of the program (same as the version of the
 240 emacs \fBetags\fP is shipped with).
 241
 242 .SH "SEE ALSO"
 243 `\|\fBemacs\fP\|' entry in \fBinfo\fP; \fIGNU Emacs Manual\fP, Richard
 244 Stallman.
 245 .br
 246 .BR cxref ( 1 ),
 247 .BR emacs ( 1 ),
 248 .BR vgrind ( 1 ),
 249 .BR vi ( 1 ).
 250
 251 .SH COPYING
 252 Copyright
 253 .if t \(co
 254 .if n (c)
 255 1999, 2001 Free Software Foundation, Inc.
 256 .PP
 257 Permission is granted to make and distribute verbatim copies of this
 258 document provided the copyright notice and this permission notice are
 259 preserved on all copies.
 260 .PP
 261 Permission is granted to copy and distribute modified versions of
 262 this document under the conditions for verbatim copying, provided that
 263 the entire resulting derived work is distributed under the terms of
 264 a permission notice identical to this one.
 265 .PP
 266 Permission is granted to copy and distribute translations of this
 267 document into another language, under the above conditions for
 268 modified versions, except that this permission notice may be stated
 269 in a translation approved by the Free Software Foundation.