# 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.
installed() {
- which $1 | grep -E '^/' > /dev/null
+ [ x`which $1 2>&1 | cut -c 1` = x/ ] || return 1
}
-# Prints the current OS. Supported are Debian (debian) and Mac OS X (darwin)
-# at the moment. If an unsupported OS is used an error is printed.
+# 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 [ -f /etc/debian_version ]; then
echo debian
+ elif [ -f /etc/gentoo-release ]; then
+ echo gentoo
elif [ x`uname` = xDarwin ]; then
echo darwin
+ elif [ x`uname` = xSunOS ]; then
+ echo sun
+ elif [ 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 basenmae
+# 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
link() {
# 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 [ \( -f "$target" -a ! -h "$target" \) -o \
+ \( -s "$target" -a ! -h "$target" \) ]; 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 [ ! -f "$source" -a ! -d "$source" -a ! -h "$source" ]; then
echo "link(): source '$source' doesn't exist!" >&2
exit 1
fi
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.
+# Write a warning to $1 to make clear it should not be modified. $2 is the
+# source for the generated file. Also print a message to stdout that the file
+# $1 was generated from $2 using the command $3 with options $4.
+warning() {
+ echo "###################################" > $1
+ echo "# WARNING! DO NOT EDIT THIS FILE! #" >> $1
+ echo "###################################" >> $1
+ echo >> $1
+ echo "# It was generated from $2 on `date`." >> $1
+ echo >> $1
+
+ # Display given options if there were any (Zsh has a problem with $options
+ # as variable name).
+ option=
+ if [ -n "$4" ]; then
+ option=" with options '$4'"
+ fi
+ # Write message to stdout.
+ echo "$3: generating '$1' from '$2'$option"
+
+ unset option
+}
+
+# Generate a file using several methods. A warning not to edit it is
+# automatically added to the created file and a message printed to stdout
+# through warning().
#
-# All arguments (except the first which is the filename) are passed to m4.
-m4() {
- # First argument is file name.
- file=$1
+# The following commands are possible; the file extension for the source file
+# in brackets.
+#
+# - m4 (.m4): pipe $2.m4 through m4 then write it to $2
+# - awk (.in): pipe $2.in through awk then write it to $2
+# - perl (.in): pipe $2.in through perl then write it to $2
+# - cat ($3): copy $2$3 to $2
+generate() {
+ # Get command and target file.
+ command="$1"
+ file="$2"
+ # Remove arguments from list.
+ 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
+ # Set extension for the used commands. When cat is used $3 is used as
+ # extension.
+ if [ x"$command" = xm4 ]; then
+ extension=.m4
+ elif [ x"$command" = xawk -o x"$command" = xperl ]; then
+ extension=.in
+ elif [ x"$command" = xcat ]; then
+ extension="$1" # is $3 in reality, $1 because of shifting
+ shift
+ # Print a warning and exit if an unsupported command is used.
+ else
+ echo "generate(): command '$command' not supported!" >&2
+ exit 1
+ fi
- # Process $1.m4 with m4 using the given options.
- echo "m4(): generating '$file' from '$file.m4' with options '$*'"
- $m4 $* $file.m4 >> $file
+ # Add warning to file and write a message to stdout.
+ warning "$file" "$file$extension" $command "$*"
+ # Generate $file from $file$extension using the given command.
+ cat "$file$extension" | $command "$@" >> "$file"
- unset file
+ unset command file
}
ruderich.org/simon / config / dotfiles.git / blobdiff