#
# Their setup.sh script sources this file.
+# Copyright (C) 2009-2013 Simon Ruderich
+#
+# 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 3 of the License, 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/>.
+
# csh gives the error "Unknown colorls variable `su'." when used with newer
-# options supported by zsh or GNU ls.
+# options supported by Zsh or GNU ls.
unset LS_COLORS
-# Get path to m4 because it's later redefined as function.
-m4=`which m4`
-
-# Check if the given program is installed. Returns 0 if it exists, 1
-# otherwise; so it can be used in if.
+# Check if the given program is installed. `type` is portable, `which` is not.
installed() {
- which $1 | grep -E '^/' > /dev/null
+ type "$1" >/dev/null 2>&1
+}
+# Get the path of the given program. Thanks to Gilles on [1] (read on
+# 2013-03-10) for the PATH-walking idea. `which` is not portable and `type`
+# has no well-formed output format.
+#
+# [1]: http://unix.stackexchange.com/questions/4988/how-do-i-test-to-see-if-an-application-exists-in-path/4991
+installed_path() {
+ test -z "$1" && return 1
+
+ # Keep IFS change local.
+ (
+ IFS=:
+ # Walk PATH.
+ for directory in $PATH; do
+ if test -x "$directory/$1"; then
+ echo "$directory/$1"
+ return 0
+ fi
+ done
+
+ return 1
+ )
+}
+
+# Usage: cmd_i <cmd> ... <file>
+#
+# Run <cmd> with all arguments (including the last file) and write the result
+# to the temporary file <file>.tmp and then renamed that file to <file>. This
+# can't be done in-place (e.g. cmd <file >file) because it truncates the file.
+cmd_i() {
+ # Get last argument.
+ last=
+ for x; do
+ last="$x"
+ done
+
+ "$@" >"$last".tmp
+ mv "$last".tmp "$last"
+}
+
+# Usage: sed_i ... <file>
+#
+# sed -i is not compatible due to different implementations. See cmd_i.
+sed_i() {
+ cmd_i sed "$@"
+}
+grep_i() {
+ cmd_i grep "$@"
+}
+
+# Usage: perl_line_filter <cmd> ...
+#
+# Run the perl command cmd on each line before printing it.
+perl_line_filter() {
+ cmd="$1"
+ shift
+
+ # Can't use -pe because it uses <> which treats the arguments as files.
+ perl -e "use strict; use warnings; while (<STDIN>) { $cmd; print; }" "$@"
}
-# Creates a symbolic link for file $1 in dirname of $2 with name of basenmae
+# Usage: simple_cpp <FIRST> <SECOND> .. -- <replacement-for-first> ...
+#
+# Replaces each FIRST (on word boundaries) with <replacement-for-first> like a
+# simple cpp replacement.
+simple_cpp() {
+ cmd='my $i = 0;'
+
+ for x; do
+ shift
+
+ if test x"$x" = x--; then
+ break
+ fi
+
+ cmd="$cmd s/\b$x\b/\$ARGV[\$i]/g; \$i++;"
+ done
+
+ perl_line_filter "$cmd" -- "$@"
+}
+
+# Print the current OS. The following OS are supported at the moment:
+#
+# - Debian (debian)
+# - Gentoo (gentoo)
+# - Mac OS X (darwin)
+# - Solaris/OpenSolaris (sun)
+# - FreeBSD (freebsd)
+#
+# If an unsupported OS is used an error is printed.
+os() {
+ if test -f /etc/debian_version; then
+ echo debian
+ elif test -f /etc/gentoo-release; then
+ echo gentoo
+ elif test x`uname` = xDarwin; then
+ echo darwin
+ elif test x`uname` = xSunOS; then
+ echo sun
+ elif test x`uname` = xFreeBSD; then
+ echo freebsd
+ else
+ echo unsupported OS! >&2
+ return 1
+ fi
+}
+
+# Creates a symbolic link for file $1 in dirname of $2 with name of basename
# $2.
#
# `./link.sh example ~/.examplerc` creates a symbolic link to example
# (wherever it is located) in ~/ named .examplerc.
link() {
+ local pwd base source target >/dev/null 2>&1 || true
+
# Get all necessary paths.
pwd=`pwd`
- base=`dirname "$2"`
- source=`echo -n "$pwd/$1" | sed "s|$base/||"`
+ base=`echo "$2" | sed "s|\~|$HOME|"` # expand ~, some sh don't do it
+ base=`dirname "$base"`
+ source=`echo "$pwd/$1" | sed "s|$base/||"`
target=`basename "$2"`
# Go to the directory where the link is going to be created.
# Abort if the target file exists and is no symbolic link. Prevents
# overwriting real files.
- if [ -e "$target" -a ! -h "$target" ]; then
+ if ( test -f "$target" && test ! -h "$target" ) || \
+ ( test -s "$target" && test ! -h "$target" ); then
echo "link(): target '$target' exists already and is no symbolic link!" >&2
exit 1
fi
- # Make sure the source exists.
- if [ ! -e "$source" ]; then
+ # Make sure the source exists (is file, directory or link).
+ if test ! -f "$source" && test ! -d "$source" && test ! -h "$source"; then
echo "link(): source '$source' doesn't exist!" >&2
exit 1
fi
# Go back to the directory where we were before.
cd "$pwd"
-
- unset pwd base source target
}
-# m4 wrapper which uses $1.m4 as template file, feeds it to m4 and writes it
-# to $1 with a warning at the beginning to not edit the generated file.
+# Generate a file from a source file using a given command. A warning not to
+# edit it is automatically added to the created file.
#
-# All arguments (except the first which is the filename) are passed to m4.
-m4() {
- # First argument is file name.
- file=$1
+# Usage: generated() <file> <extension> <cmd..>
+#
+# If an empty extension is provided, the file is modified in-place (through a
+# temporary file).
+generate() {
+ local file >/dev/null 2>&1 || true
+ local file_tmp >/dev/null 2>&1 || true
+ local extension >/dev/null 2>&1 || true
+
+ # Get command and target file.
+ file="$1"
+ extension="$2"
+ shift
shift
- # Write a warning to the generated file.
- echo "###################################" > $file
- echo "# WARNING! DO NOT EDIT THIS FILE! #" >> $file
- echo "###################################" >> $file
- echo >> $file
- echo "# It was generated from $file.m4 on `date`." >> $file
- echo >> $file
+ if test -z "$extension"; then
+ file_tmp="$file.tmp"
+ else
+ # We only need this message if we generate a new file.
+ printf "%s: generating from '%s' (%s)\n" \
+ "$file" "$file$extension" "$1"
+
+ echo '###################################' >"$file"
+ echo '# WARNING! DO NOT EDIT THIS FILE! #' >>"$file"
+ echo '###################################' >>"$file"
+ echo >>"$file"
+ echo "# It was generated from $file$extension on `date`." >>"$file"
+ echo >>"$file"
+
+ file_tmp="$file"
+ fi
- # Process $1.m4 with m4 using the given options.
- echo "m4(): generating '$file' from '$file.m4' with options '$*'"
- $m4 $* $file.m4 >> $file
+ # Generate $file from $file$extension using the given command.
+ "$@" <"$file$extension" >>"$file_tmp"
- unset file
+ if test -z "$extension"; then
+ mv "$file_tmp" "$file"
+ fi
}
ruderich.org/simon / config / dotfiles.git / blobdiff