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#!/bin/bash
function assert_eq() {
local expected="$1"
local actual="$2"
local message="$3"
if [ "$1" -ne "$2" ] ; then
if [ ! -z "$message" ]; then
echo "$message"
fi
die_usage
fi
}
function assert_le() {
local expected="$1"
local actual="$2"
local message="$3"
if [ "$1" -gt "$2" ] ; then
if [ ! -z "$message" ]; then
echo "$message"
fi
die_usage
fi
}
function get_pkginfo() {
local file="$1"
# FIXME remove dep on GNU tar
tar --to-stdout -xf "$file" .PKGINFO
}
function get_pkginfo_field() {
local file="$1"
local field="$2"
get_pkginfo "$file" | grep '^'"$field"'' | awk -F' = ' '{print $2}'
}
function die_usage() {
echo "Syntax: introspect.sh <action> [options]"
echo ""
echo "Valid actions:"
echo "all <package>"
echo "field <package> <field_name>"
echo "files <package>"
exit 1
}
assert_le 2 $# "Not enough arguments"
case "$1" in
"all")
assert_eq 2 $#
get_pkginfo $2
;;
"field")
assert_eq 3 $#
get_pkginfo_field $2 $3
;;
"files")
assert_eq 2 $#
echo Files not implemented
exit 1
;;
*)
echo "Unknown action \"$1\""
die_usage
;;
esac
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