libtool/libltdl/config/edit-readme-alpha
Gary V. Vaughan 850f41781e maint: edit-readme-alpha shouldn't try to re-edit during dist.
* libltdl/config/edit-readme-alpha: If README is non-writable
assume that it is being run from distcheck, and bail out with
a warning (to help diagnose cases where the heuristic is not
correct).  However, if README has already been edited to the
alpha text, quietly skip without an error message.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
2010-09-21 14:10:38 +07:00

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#! /bin/sh
# edit-readme-alpha - edit README file for alpha releases
# Copyright (C) 2010 Free Software Foundation, Inc.
# Written by Gary V. Vaughan, 2010
#
# This file is part of GNU Libtool.
#
# GNU Libtool 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 of
# the License, or (at your option) any later version.
#
# GNU Libtool 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 GNU Libtool; see the file COPYING. If not, a copy
# can be downloaded from http://www.gnu.org/licenses/gpl.html,
# or obtained by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
####
# We used to maintain separate (but extremely similiar!) README and
# README.alpha files, and had `make dist' include the right one in a
# distribution based on the contests of `$(VERSION)'.
#
# Now, we have `make dist' call this script to tweak the first paragraph
# of README in situ, to be more suitable for an alpha quality release.
EXIT_SUCCESS=0
EXIT_FAILURE=1
# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh
# is ksh but when the shell is invoked as "sh" and the current value of
# the _XPG environment variable is not equal to 1 (one), the special
# positional parameter $0, within a function call, is the name of the
# function.
progpath="$0"
# The name of this program:
progname=`echo "$progpath" |sed 's|^.*/||'`
# func_fatal_error ARG...
# -----------------------
# Echo program name prefixed message to standard error, and exit.
func_fatal_error ()
{
echo "$progname: $*" >&2
exit $EXIT_FAILURE
}
for file in "$@"; do
# Assume that read-only README indicates that we are running inside
# the latter part of a `make distcheck'.
test -w $file || {
echo "$progname: not editing non-writeable \`$file' (distcheck?)" >&2
continue
}
# Make sure the paragraph we are matching has not been edited since
# this script was written.
matched=`sed -n -e '/^This is GNU Libtool,/,/^interface\.$/p' $file \
|wc -l |sed 's|^ *||'`
# Unless, of course, it was edited by this script already.
test 3 = "$matched" \
|| matched=`sed -n -e '/^This is an alpha testing release/,/behind a consistent, portable interface\.$/p' $file \
|wc -l |sed 's|^ *||'`
test 3 = "$matched" \
|| func_fatal_error "$file format has changed, please fix \`$0'"
# Don't leave file droppings.
trap 'x=$?; rm $file.T; exit $x' 1 2 13 15
# Edit the first paragraph to be suitable for an alpha release.
sed -e '/^This is GNU Libtool,/,/^interface.$/c\
This is an alpha testing release of GNU Libtool, a generic library\
support script. Libtool hides the complexity of using shared libraries\
behind a consistent, portable interface.' $file > $file.T
# Diagnose redirection failure.
test -f $file.T || func_fatal_error "Unable to write $file.T"
# Overwrite the original file with our edited version.
mv $file.T $file || func_fatal_error "Unable to edit $file"
done
exit $EXIT_SUCCESS