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#!/bin/bash

# Random integrity things
[ "$UID" = "" ] && UID=$(uid)

# Useful functions

UMASK=""
set_umask () {
	[ "$UMASK" == "" ] && UMASK="$(umask)"
	umask 002
}

restore_umask () {
	umask $UMASK
}

repo_lock () { #repo_lock repo-name arch
	LOCKFILE="$TMPDIR/.repolock.$1.$2"
	if [ -f "$LOCKFILE" ]; then
		owner="$(/usr/bin/stat -c %U $LOCKFILE)"
		echo "error: db generation is already in progress (started by $owner)" >&2
		exit 1
	else
		/bin/touch "$LOCKFILE"
		if [ ! -f "$LOCKFILE" ]; then
			echo "error: could not create repo lock... something went wrong!" >&2
		fi
		set_umask
	fi
}

repo_unlock () { #repo_unlock repo-name arch
	LOCKFILE="$TMPDIR/.repolock.$1.$2"
	if [ ! -f "$LOCKFILE" ]; then
		echo "error: repo lock doesn't exist... something went terribly wrong!" >&2
	else
		rm -f "$LOCKFILE"
	fi
	restore_umask
}

# usage: _grep_pkginfo pkgfile pattern
_grep_pkginfo() {
	local _ret

	_ret="$(/usr/bin/bsdtar -xOqf "$1" .PKGINFO | /bin/grep -m 1 -E "$2" | /bin/sed 's|\w*\s*=\s*\(.*\)|\1|')"
	echo "$_ret"
}


# Get the package base or name as fallback
getpkgbase() {
	local _base

	_base="$(_grep_pkginfo "$1" "^pkgbase")"
	if [ -z "$_base" ]; then
		getpkgname "$1"
	fi

	echo "$_base"
}

# Get the package name
getpkgname() {
	local _name

	_name="$(_grep_pkginfo "$1" "^pkgname")"
	if [ -z "$_name" ]; then
		echo "ERROR: Package '$1' has no pkgname in the PKGINFO. Fail!" >&2
		exit 1
	fi

	echo "$_name"
}

# Get the pkgver-pkgrel of this package
getpkgver() {
	local _ver

	_ver="$(_grep_pkginfo "$1" "^pkgver")"
	if [ -z "$_ver" ]; then
		echo "ERROR: Package '$1' has no pkgver in the PKGINFO. Fail!" >&2
		exit 1
	fi

	echo "$_ver"
}

getpkgfile() {
	if [[ ${#} -ne 1 ]]; then
		echo 'ERROR: No canonical package found!' >&2
		exit 1
	elif [ ! -f "${1}" ]; then
		echo "ERROR: Package ${1} not found!" >&2
		exit 1
	fi

	echo ${1}
}

getpkgfiles() {
	if [ ! -z "$(echo ${@%\.*} | sed "s/ /\n/g" | sort | uniq -D)" ]; then
		echo 'ERROR: Duplicate packages found!'>&2
		exit 1
	fi

	for f in ${@}; do
		if  [ ! -f "${f}" ]; then
			echo "ERROR: Package ${f} not found!" >&2
			exit 1
		fi
	done

	echo ${@}
}

check_pkg_arch () { #check_pkg_arch pkgfile arch
	local _arch
	_arch="$(_grep_pkginfo "$1" "^arch")"

	if [ -z "$_arch" ]; then
		echo "ERROR: Package '$1' has no arch in the PKGINFO. Fail!" >&2
		return 1
	fi
	if [ "$_arch" = "$2" ]; then
		return 0
	else
		return 1
	fi
}

get_repos_for_host() {
	if [ "$(hostname)" = "sigurd" ]; then
		echo "community community-testing"
	else
		echo "core extra testing"
	fi
}

#usage: chk_license ${license[@]}"
chk_license() {
    local l
    for l in "$@"; do
        l="$(echo $l | tr '[:upper:]' '[:lower:]')"
        for allowed in ${ALLOWED_LICENSES[@]}; do
            allowed="$(echo $allowed | tr '[:upper:]' '[:lower:]')"
            if [ "$l" = "$allowed" ]; then
                return 0
            fi
        done
    done

    return 1
}

# vim: set ts=4 sw=4 noet ft=sh: