X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=lib.sh;h=7b76a7cab66b08cad1d639f0c059fae2dc637798;hb=f2ae0a2fdd20981164c1a10b0be4c354234610b0;hp=1862444f7f560fd9b6eb1922da19423b01459fc0;hpb=67e3a3758949c35f395284cb1cea41c4e17c3e95;p=config%2Fdotfiles.git
diff --git a/lib.sh b/lib.sh
index 1862444..7b76a7c 100644
--- a/lib.sh
+++ b/lib.sh
@@ -2,20 +2,67 @@
#
# 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 .
+
# csh gives the error "Unknown colorls variable `su'." when used with newer
# options supported by Zsh or GNU ls.
unset LS_COLORS
-# 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() {
- # Thanks to Rado in #awk on Freenode (2010-03-29 01:34) for the END tip to
- # also work with empty stdin, and to prince_jammys in #awk on Freenode
- # (2010-03-29 02:20) for a shorter syntax for "$0 !~".
- which $1 2>&1 | awk '{ if (!/^\//) exit 1 }
- END { if (NR == 0) exit 1 }'
+ 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/$1"
+ return 0
+ fi
+ done
+
+ return 1
+ )
+}
+
+# Usage: sed_i ...
+#
+# Uses .tmp as temporary file. sed -i is not compatible due to different
+# implementations.
+sed_i() {
+ # Get last argument.
+ last=
+ for x; do
+ last="$x"
+ done
+
+ sed "$@" >"$last".tmp
+ mv "$last".tmp "$last"
}
# Print the current OS. The following OS are supported at the moment:
@@ -23,16 +70,19 @@ installed() {
# - Gentoo (gentoo)
# - Mac OS X (darwin)
# - Solaris/OpenSolaris (sun)
+# - 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 test x`uname` = xFreeBSD; then
+ echo freebsd
else
echo unsupported OS! >&2
return 1
@@ -45,6 +95,8 @@ os() {
# `./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
@@ -57,14 +109,14 @@ link() {
# 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
@@ -76,8 +128,6 @@ link() {
# 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
@@ -94,7 +144,7 @@ warning() {
# 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.
@@ -124,11 +174,11 @@ generate() {
# 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.