installed() {
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/$1"
+ return 0
+ fi
+ done
+
+ return 1
+ )
+}
+
+# Usage: sed_i ... <file>
+#
+# Uses <file>.tmp as temporary file. sed -i is not compatible due to different
+# implementations.
+sed_i() {
+ # Get last argument.
+ last=
+ for x; do
+ last="$x"
+ done
+
+ sed "$@" >"$last".tmp
+ mv "$last".tmp "$last"
+}
# Print the current OS. The following OS are supported at the moment:
# - Debian (debian)
# - FreeBSD (freebsd)
# If an unsupported OS is used an error is printed.
os() {
- if [ -f /etc/debian_version ]; then
+ if test -f /etc/debian_version; then
echo debian
- elif [ -f /etc/gentoo-release ]; then
+ elif test -f /etc/gentoo-release; then
echo gentoo
- elif [ x`uname` = xDarwin ]; then
+ elif test x`uname` = xDarwin; then
echo darwin
- elif [ x`uname` = xSunOS ]; then
+ elif test x`uname` = xSunOS; then
echo sun
- elif [ x`uname` = xFreeBSD ]; then
+ elif test x`uname` = xFreeBSD; then
echo freebsd
else
echo unsupported OS! >&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=`echo "$2" | sed "s|\~|$HOME|"` # expand ~, some sh don't do it
# Abort if the target file exists and is no symbolic link. Prevents
# overwriting real files.
- if [ \( -f "$target" -a ! -h "$target" \) -o \
- \( -s "$target" -a ! -h "$target" \) ]; then
+ if ( test -f "$target" && test ! -h "$target" ) || \
+ ( test -s "$target" && test ! -h "$target" ); then
echo "link(): target '$target' exists already and is no symbolic link!" >&2
exit 1
fi
# Make sure the source exists (is file, directory or link).
- if [ ! -f "$source" -a ! -d "$source" -a ! -h "$source" ]; then
+ 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
}
# Write a warning to $1 to make clear it should not be modified. $2 is the
# Display given options if there were any (Zsh has a problem with $options
# as variable name).
option=
- if [ -n "$4" ]; then
+ if test -n "$4"; then
option=" with options '$4'"
fi
# Write message to stdout.
# Set extension for the used commands. When cat is used $3 is used as
# extension.
- if [ x"$command" = xm4 ]; then
+ if test x"$command" = xm4; then
extension=.m4
- elif [ x"$command" = xawk -o x"$command" = xperl ]; then
+ elif test x"$command" = xawk -o x"$command" = xperl; then
extension=.in
- elif [ x"$command" = xcat ]; then
+ elif test x"$command" = xcat; then
extension="$1" # is $3 in reality, $1 because of shifting
shift
# Print a warning and exit if an unsupported command is used.