fixup: avoid unconditional re-bootstrapping on "make dist"

Since our 'bootstrap' script is distributed, the 'distdir' target depends
on it.  But in our GNUmakefile, we also have a 'bootstrap' target declared
.PHONY, which when called re-bootstrap the Automake distribution.  Thus,
whenever we run "make dist", GNU make sees it must remake the 'bootstrap'
target (as it is a dependency of the 'distdir' target), and thus ends up
re-bootstrapping all the package (because of the .PHONY 'bootstrap' target
in GNUmakefile).

We fix this issue by renaming our bootstrap script to 'bootstrap.sh'.

* bootstrap: Renamed ...
* bootstrap.sh: ... to this.
* GNUmakefile (bootstrap): Adjust.
* Makefile.am (EXTRA_DIST): Likewise.
(autodiffs): Likewise.
* HACKING: Likewise.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100755
index 000000000..1cede01aa
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,122 @@
+#! /bin/sh
+
+# This script helps bootstrap automake, when checked out from git.
+#
+# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+# Originally written by Pavel Roskin <proski@gnu.org> September 2002.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program 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.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Don't ignore failures.
+set -e
+
+# Set program basename.
+me=`echo "$0" | sed 's,^.*/,,'`
+
+# Let user choose which version of autoconf, autom4te and perl to use.
+: ${AUTOCONF=autoconf}
+export AUTOCONF  # might be used by aclocal and/or automake
+: ${AUTOM4TE=autom4te}
+export AUTOM4TE  # ditto
+: ${PERL=perl}
+
+# Variables to substitute.
+VERSION=`sed -ne '/AC_INIT/s/^[^[]*\[[^[]*\[\([^]]*\)\].*$/\1/p' configure.ac`
+PACKAGE=automake
+datadir=.
+PERL_THREADS=0
+
+# Override SHELL.  This is required on DJGPP so that Perl's system()
+# uses bash, not COMMAND.COM which doesn't quote arguments properly.
+# It's not used otherwise.
+if test -n "$DJDIR"; then
+  BOOTSTRAP_SHELL=/dev/env/DJDIR/bin/bash.exe
+else
+  BOOTSTRAP_SHELL=/bin/sh
+fi
+
+# Read the rule for calculating APIVERSION and execute it.
+apiver_cmd=`sed -ne 's/\[\[/[/g;s/\]\]/]/g;/^APIVERSION=/p' configure.ac`
+eval "$apiver_cmd"
+
+# Sanity checks.
+if test -z "$VERSION"; then
+  echo "$me: cannot find VERSION" >&2
+  exit 1
+fi
+
+if test -z "$APIVERSION"; then
+  echo "$me: cannot find APIVERSION" >&2
+  exit 1
+fi
+
+# Make a dummy versioned directory for aclocal.
+rm -rf aclocal-$APIVERSION
+mkdir aclocal-$APIVERSION
+if test -d automake-$APIVERSION; then
+  find automake-$APIVERSION -exec chmod u+wx '{}' ';'
+fi
+rm -rf automake-$APIVERSION
+# Can't use "ln -s lib automake-$APIVERSION", that would create a
+# lib.exe stub under DJGPP 2.03.
+mkdir automake-$APIVERSION
+cp -rf lib/* automake-$APIVERSION
+
+dosubst ()
+{
+  rm -f $2
+  in=`echo $1 | sed 's,^.*/,,'`
+  current_year=`date +%Y` && test -n "$current_year" \
+    || { echo "$me: cannot get current year" >&2; exit 1; }
+  sed -e "s%@APIVERSION@%$APIVERSION%g" \
+      -e "s%@PACKAGE@%$PACKAGE%g" \
+      -e "s%@PERL@%$PERL%g" \
+      -e "s%@PERL_THREADS@%$PERL_THREADS%g" \
+      -e "s%@SHELL@%$BOOTSTRAP_SHELL%g" \
+      -e "s%@VERSION@%$VERSION%g" \
+      -e "s%@datadir@%$datadir%g" \
+      -e "s%@RELEASE_YEAR@%$current_year%g" \
+      -e "s%@configure_input@%Generated from $in; do not edit by hand.%g" \
+      $1 > $2
+  chmod a-w $2
+}
+
+# Create temporary replacement for lib/Automake/Config.pm.
+dosubst automake-$APIVERSION/Automake/Config.in \
+        automake-$APIVERSION/Automake/Config.pm
+
+# Create temporary replacement for aclocal.
+dosubst aclocal.in aclocal.tmp
+
+# Overwrite amversion.m4.
+dosubst m4/amversion.in m4/amversion.m4
+
+# Create temporary replacement for automake.
+dosubst automake.in automake.tmp
+
+# Create required makefile snippets.
+$PERL ./gen-testsuite-part > t/testsuite-part.tmp
+chmod a-w t/testsuite-part.tmp
+mv -f t/testsuite-part.tmp t/testsuite-part.am
+
+# Run the autotools.
+# Use '-I' here so that our own *.m4 files in m4/ gets included,
+# not copied, in aclocal.m4.
+$PERL ./aclocal.tmp -I m4 --automake-acdir m4 --system-acdir m4/acdir
+$AUTOCONF
+$PERL ./automake.tmp
+
+# Remove temporary files and directories.
+rm -rf aclocal-$APIVERSION automake-$APIVERSION
+rm -f aclocal.tmp automake.tmp