1#! /bin/sh
2# Common wrapper for a few potentially missing GNU programs.
3
4scriptversion=2018-03-07.03; # UTC
5
6# Copyright (C) 1996-2018 Free Software Foundation, Inc.
7# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
8
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation; either version 2, or (at your option)
12# any later version.
13
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17# GNU General Public License for more details.
18
19# You should have received a copy of the GNU General Public License
20# along with this program.  If not, see <https://www.gnu.org/licenses/>.
21
22# As a special exception to the GNU General Public License, if you
23# distribute this file as part of a program that contains a
24# configuration script generated by Autoconf, you may include it under
25# the same distribution terms that you use for the rest of that program.
26
27if test $# -eq 0; then
28  echo 1>&2 "Try '$0 --help' for more information"
29  exit 1
30fi
31
32case $1 in
33
34  --is-lightweight)
35    # Used by our autoconf macros to check whether the available missing
36    # script is modern enough.
37    exit 0
38    ;;
39
40  --run)
41    # Back-compat with the calling convention used by older automake.
42    shift
43    ;;
44
45  -h|--h|--he|--hel|--help)
46    echo "\
47$0 [OPTION]... PROGRAM [ARGUMENT]...
48
49Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
50to PROGRAM being missing or too old.
51
52Options:
53  -h, --help      display this help and exit
54  -v, --version   output version information and exit
55
56Supported PROGRAM values:
57  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
58  bison     yacc      flex         lex       help2man
59
60Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
61'g' are ignored when checking the name.
62
63Send bug reports to <bug-automake@gnu.org>."
64    exit $?
65    ;;
66
67  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
68    echo "missing $scriptversion (GNU Automake)"
69    exit $?
70    ;;
71
72  -*)
73    echo 1>&2 "$0: unknown '$1' option"
74    echo 1>&2 "Try '$0 --help' for more information"
75    exit 1
76    ;;
77
78esac
79
80# Run the given program, remember its exit status.
81"$@"; st=$?
82
83# If it succeeded, we are done.
84test $st -eq 0 && exit 0
85
86# Also exit now if we it failed (or wasn't found), and '--version' was
87# passed; such an option is passed most likely to detect whether the
88# program is present and works.
89case $2 in --version|--help) exit $st;; esac
90
91# Exit code 63 means version mismatch.  This often happens when the user
92# tries to use an ancient version of a tool on a file that requires a
93# minimum version.
94if test $st -eq 63; then
95  msg="probably too old"
96elif test $st -eq 127; then
97  # Program was missing.
98  msg="missing on your system"
99else
100  # Program was found and executed, but failed.  Give up.
101  exit $st
102fi
103
104perl_URL=https://www.perl.org/
105flex_URL=https://github.com/westes/flex
106gnu_software_URL=https://www.gnu.org/software
107
108program_details ()
109{
110  case $1 in
111    aclocal|automake)
112      echo "The '$1' program is part of the GNU Automake package:"
113      echo "<$gnu_software_URL/automake>"
114      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
115      echo "<$gnu_software_URL/autoconf>"
116      echo "<$gnu_software_URL/m4/>"
117      echo "<$perl_URL>"
118      ;;
119    autoconf|autom4te|autoheader)
120      echo "The '$1' program is part of the GNU Autoconf package:"
121      echo "<$gnu_software_URL/autoconf/>"
122      echo "It also requires GNU m4 and Perl in order to run:"
123      echo "<$gnu_software_URL/m4/>"
124      echo "<$perl_URL>"
125      ;;
126  esac
127}
128
129give_advice ()
130{
131  # Normalize program name to check for.
132  normalized_program=`echo "$1" | sed '
133    s/^gnu-//; t
134    s/^gnu//; t
135    s/^g//; t'`
136
137  printf '%s\n' "'$1' is $msg."
138
139  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
140  case $normalized_program in
141    autoconf*)
142      echo "You should only need it if you modified 'configure.ac',"
143      echo "or m4 files included by it."
144      program_details 'autoconf'
145      ;;
146    autoheader*)
147      echo "You should only need it if you modified 'acconfig.h' or"
148      echo "$configure_deps."
149      program_details 'autoheader'
150      ;;
151    automake*)
152      echo "You should only need it if you modified 'Makefile.am' or"
153      echo "$configure_deps."
154      program_details 'automake'
155      ;;
156    aclocal*)
157      echo "You should only need it if you modified 'acinclude.m4' or"
158      echo "$configure_deps."
159      program_details 'aclocal'
160      ;;
161   autom4te*)
162      echo "You might have modified some maintainer files that require"
163      echo "the 'autom4te' program to be rebuilt."
164      program_details 'autom4te'
165      ;;
166    bison*|yacc*)
167      echo "You should only need it if you modified a '.y' file."
168      echo "You may want to install the GNU Bison package:"
169      echo "<$gnu_software_URL/bison/>"
170      ;;
171    lex*|flex*)
172      echo "You should only need it if you modified a '.l' file."
173      echo "You may want to install the Fast Lexical Analyzer package:"
174      echo "<$flex_URL>"
175      ;;
176    help2man*)
177      echo "You should only need it if you modified a dependency" \
178           "of a man page."
179      echo "You may want to install the GNU Help2man package:"
180      echo "<$gnu_software_URL/help2man/>"
181    ;;
182    makeinfo*)
183      echo "You should only need it if you modified a '.texi' file, or"
184      echo "any other file indirectly affecting the aspect of the manual."
185      echo "You might want to install the Texinfo package:"
186      echo "<$gnu_software_URL/texinfo/>"
187      echo "The spurious makeinfo call might also be the consequence of"
188      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
189      echo "want to install GNU make:"
190      echo "<$gnu_software_URL/make/>"
191      ;;
192    *)
193      echo "You might have modified some files without having the proper"
194      echo "tools for further handling them.  Check the 'README' file, it"
195      echo "often tells you about the needed prerequisites for installing"
196      echo "this package.  You may also peek at any GNU archive site, in"
197      echo "case some other package contains this missing '$1' program."
198      ;;
199  esac
200}
201
202give_advice "$1" | sed -e '1s/^/WARNING: /' \
203                       -e '2,$s/^/         /' >&2
204
205# Propagate the correct exit status (expected to be 127 for a program
206# not found, 63 for a program that failed due to version mismatch).
207exit $st
208
209# Local variables:
210# eval: (add-hook 'before-save-hook 'time-stamp)
211# time-stamp-start: "scriptversion="
212# time-stamp-format: "%:y-%02m-%02d.%02H"
213# time-stamp-time-zone: "UTC0"
214# time-stamp-end: "; # UTC"
215# End:
216