autogen.sh

   1 #!/bin/sh
   2 ### autogen.sh - tool to help build Emacs from a repository checkout
   3
   4 ## Copyright (C) 2011-2016 Free Software Foundation, Inc.
   5
   6 ## Author: Glenn Morris <rgm@gnu.org>
   7 ## Maintainer: emacs-devel@gnu.org
   8
   9 ## This file is part of GNU Emacs.
  10
  11 ## GNU Emacs is free software: you can redistribute it and/or modify
  12 ## it under the terms of the GNU General Public License as published by
  13 ## the Free Software Foundation, either version 3 of the License, or
  14 ## (at your option) any later version.
  15
  16 ## GNU Emacs is distributed in the hope that it will be useful,
  17 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ## GNU General Public License for more details.
  20
  21 ## You should have received a copy of the GNU General Public License
  22 ## along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ### Commentary:
  25
  26 ## The Emacs repository does not include the configure script (and
  27 ## associated helpers).  The first time you fetch Emacs from the repo,
  28 ## run this script to generate the necessary files.
  29 ## For more details, see the file INSTALL.REPO.
  30
  31 ### Code:
  32
  33 ## Tools we need:
  34 ## Note that we respect the values of AUTOCONF etc, like autoreconf does.
  35 progs="autoconf automake"
  36
  37 ## Minimum versions we need:
  38 autoconf_min=`sed -n 's/^ *AC_PREREQ(\([0-9\.]*\)).*/\1/p' configure.ac`
  39
  40 ## This will need improving if more options are ever added to the
  41 ## AM_INIT_AUTOMAKE call.
  42 automake_min=`sed -n 's/^ *AM_INIT_AUTOMAKE(\([0-9\.]*\)).*/\1/p' configure.ac`
  43
  44
  45 ## $1 = program, eg "autoconf".
  46 ## Echo the version string, eg "2.59".
  47 ## FIXME does not handle things like "1.4a", but AFAIK those are
  48 ## all old versions, so it is OK to fail there.
  49 ## Also note that we do not handle micro versions.
  50 get_version ()
  51 {
  52     ## Remove eg "./autogen.sh: line 50: autoconf: command not found".
  53     $1 --version 2>&1 | sed -e '/not found/d' -e 's/.* //' -n -e '1 s/\([0-9][0-9\.]*\).*/\1/p'
  54 }
  55
  56 ## $1 = version string, eg "2.59"
  57 ## Echo the major version, eg "2".
  58 major_version ()
  59 {
  60     echo $1 | sed -e 's/\([0-9][0-9]*\)\..*/\1/'
  61 }
  62
  63 ## $1 = version string, eg "2.59"
  64 ## Echo the minor version, eg "59".
  65 minor_version ()
  66 {
  67     echo $1 | sed -e 's/[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/'
  68 }
  69
  70 ## $1 = program
  71 ## $2 = minimum version.
  72 ## Return 0 if program is present with version >= minimum version.
  73 ## Return 1 if program is missing.
  74 ## Return 2 if program is present but too old.
  75 ## Return 3 for unexpected error (eg failed to parse version).
  76 check_version ()
  77 {
  78     ## Respect eg $AUTOMAKE if it is set, like autoreconf does.
  79     uprog=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
  80
  81     eval uprog=\$${uprog}
  82
  83     [ x"$uprog" = x ] && uprog=$1
  84
  85     have_version=`get_version $uprog`
  86
  87     [ x"$have_version" = x ] && return 1
  88
  89     have_maj=`major_version $have_version`
  90     need_maj=`major_version $2`
  91
  92     [ x"$have_maj" != x ] && [ x"$need_maj" != x ] || return 3
  93
  94     [ $have_maj -gt $need_maj ] && return 0
  95     [ $have_maj -lt $need_maj ] && return 2
  96
  97     have_min=`minor_version $have_version`
  98     need_min=`minor_version $2`
  99
 100     [ x"$have_min" != x ] && [ x"$need_min" != x ] || return 3
 101
 102     [ $have_min -ge $need_min ] && return 0
 103     return 2
 104 }
 105
 106 do_autoconf=false
 107 test $# -eq 0 && do_autoconf=true
 108 do_git=false
 109
 110 for arg; do
 111     case $arg in
 112       --help)
 113         exec echo "$0: usage: $0 [all|autoconf|git]";;
 114       all)
 115         do_autoconf=true do_git=true;;
 116       autoconf)
 117         do_autoconf=true;;
 118       git)
 119         do_git=true;;
 120       *)
 121         echo >&2 "$0: $arg: unknown argument"; exit 1;;
 122     esac
 123 done
 124
 125
 126 # Generate Autoconf and Automake related files, if requested.
 127
 128 if $do_autoconf; then
 129
 130   echo 'Checking whether you have the necessary tools...
 131 (Read INSTALL.REPO for more details on building Emacs)'
 132
 133   missing=
 134
 135   for prog in $progs; do
 136
 137     sprog=`echo "$prog" | sed 's/-/_/g'`
 138
 139     eval min=\$${sprog}_min
 140
 141     echo "Checking for $prog (need at least version $min)..."
 142
 143     check_version $prog $min
 144
 145     retval=$?
 146
 147     case $retval in
 148         0) stat="ok" ;;
 149         1) stat="missing" ;;
 150         2) stat="too old" ;;
 151         *) stat="unable to check" ;;
 152     esac
 153
 154     echo $stat
 155
 156     if [ $retval -ne 0 ]; then
 157         missing="$missing $prog"
 158         eval ${sprog}_why=\""$stat"\"
 159     fi
 160
 161   done
 162
 163
 164   if [ x"$missing" != x ]; then
 165
 166     echo '
 167 Building Emacs from the repository requires the following specialized programs:'
 168
 169     for prog in $progs; do
 170         sprog=`echo "$prog" | sed 's/-/_/g'`
 171
 172         eval min=\$${sprog}_min
 173
 174         echo "$prog (minimum version $min)"
 175     done
 176
 177
 178     echo '
 179 Your system seems to be missing the following tool(s):'
 180
 181     for prog in $missing; do
 182         sprog=`echo "$prog" | sed 's/-/_/g'`
 183
 184         eval why=\$${sprog}_why
 185
 186         echo "$prog ($why)"
 187     done
 188
 189     echo '
 190 If you think you have the required tools, please add them to your PATH
 191 and re-run this script.
 192
 193 Otherwise, please try installing them.
 194 On systems using rpm and yum, try: "yum install PACKAGE"
 195 On systems using dpkg and apt, try: "apt-get install PACKAGE"
 196 Then re-run this script.
 197
 198 If you do not have permission to do this, or if the version provided
 199 by your system is too old, it is normally straightforward to build
 200 these packages from source.  You can find the sources at:
 201
 202 ftp://ftp.gnu.org/gnu/PACKAGE/
 203
 204 Download the package (make sure you get at least the minimum version
 205 listed above), extract it using tar, then run configure, make,
 206 make install.  Add the installation directory to your PATH and re-run
 207 this script.
 208
 209 If you know that the required versions are in your PATH, but this
 210 script has made an error, then you can simply run
 211
 212 autoreconf -fi -I m4
 213
 214 instead of this script.
 215
 216 Please report any problems with this script to bug-gnu-emacs@gnu.org .'
 217
 218     exit 1
 219   fi
 220
 221   echo 'Your system has the required tools.'
 222   echo "Running 'autoreconf -fi -I m4' ..."
 223
 224
 225   ## Let autoreconf figure out what, if anything, needs doing.
 226   ## Use autoreconf's -f option in case autoreconf itself has changed.
 227   autoreconf -fi -I m4 || exit $?
 228
 229   ## Create a timestamp, so that './autogen.sh; make' doesn't
 230   ## cause 'make' to needlessly run 'autoheader'.
 231   echo timestamp > src/stamp-h.in || exit
 232 fi
 233
 234
 235 # True if the Git setup was OK before autogen.sh was run.
 236
 237 git_was_ok=true
 238
 239 if $do_git; then
 240     case `cp --help 2>/dev/null` in
 241       *--backup*--verbose*)
 242         cp_options='--backup=numbered --verbose';;
 243       *)
 244         cp_options='-f';;
 245     esac
 246 fi
 247
 248
 249 # Like 'git config NAME VALUE' but verbose on change and exiting on failure.
 250 # Also, do not configure unless requested.
 251
 252 git_config ()
 253 {
 254     name=$1
 255     value=$2
 256
 257     ovalue=`git config --get "$name"` && test "$ovalue" = "$value" || {
 258         if $do_git; then
 259             if $git_was_ok; then
 260                 echo 'Configuring local git repository...'
 261                 case $cp_options in
 262                   --backup=*)
 263                     cp $cp_options --force .git/config .git/config || exit;;
 264                 esac
 265             fi
 266             echo "git config $name '$value'"
 267             git config "$name" "$value" || exit
 268         fi
 269         git_was_ok=false
 270     }
 271 }
 272
 273 ## Configure Git, if requested.
 274
 275 # Check hashes when transferring objects among repositories.
 276
 277 git_config transfer.fsckObjects true
 278
 279
 280 # Configure 'git diff' hunk header format.
 281
 282 git_config diff.elisp.xfuncname \
 283            '^\(def[^[:space:]]+[[:space:]]+([^()[:space:]]+)'
 284 git_config diff.texinfo.xfuncname \
 285            '^@node[[:space:]]+([^,[:space:]][^,]+)'
 286
 287
 288 # Install Git hooks.
 289
 290 tailored_hooks=
 291 sample_hooks=
 292
 293 for hook in commit-msg pre-commit; do
 294     cmp build-aux/git-hooks/$hook .git/hooks/$hook >/dev/null 2>&1 ||
 295         tailored_hooks="$tailored_hooks $hook"
 296 done
 297 for hook in applypatch-msg pre-applypatch; do
 298     src=.git/hooks/$hook.sample
 299     cmp "$src" .git/hooks/$hook >/dev/null 2>&1 ||
 300         sample_hooks="$sample_hooks $hook"
 301 done
 302
 303 if test -n "$tailored_hooks$sample_hooks"; then
 304     if $do_git; then
 305         echo "Installing git hooks..."
 306
 307         if test -n "$tailored_hooks"; then
 308             for hook in $tailored_hooks; do
 309                 dst=.git/hooks/$hook
 310                 cp $cp_options build-aux/git-hooks/$hook "$dst" || exit
 311                 chmod a-w "$dst" || exit
 312             done
 313         fi
 314
 315         if test -n "$sample_hooks"; then
 316             for hook in $sample_hooks; do
 317                 cp $cp_options .git/hooks/$hook.sample .git/hooks/$hook || exit
 318                 chmod a-w .git/hooks/$hook || exit
 319             done
 320         fi
 321     else
 322         git_was_ok=false
 323     fi
 324 fi
 325
 326 if test ! -f configure; then
 327     echo "You can now run '$0 autoconf'."
 328 elif test -d .git && test $git_was_ok = false && test $do_git = false; then
 329     echo "You can now run '$0 git'."
 330 elif test ! -f config.status ||
 331         test -n "`find src/stamp-h.in -newer config.status`"; then
 332     echo "You can now run './configure'."
 333 fi
 334
 335 exit 0
 336
 337 ### autogen.sh ends here