gentoo-x86/eclass/portability.eclass

# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.1 2005/09/18 17:33:44 flameeyes Exp $
#
# Author: Diego Pettenò <flameeyes@gentoo.org>
#
# This eclass is created to avoid using non-portable GNUisms inside ebuilds
#
# NB:  If you add anything, please comment it!

# treecopy orig1 orig2 orig3 .... dest
#
# mimic cp --parents copy, but working on BSD userland as well
treecopy() {
        dest=${!#}
        files_count=$#

        while(( $# > 1 )); do
                dirstruct=$(dirname "$1")
                mkdir -p "${dest}/${dirstruct}"
                cp -pPR "$1" "${dest}/${dirstruct}"

                shift
        done
}

# seq min max
#
# compatibility function that mimes seq command if not available
seq() {
        local p
        p=$(type -P seq)

        case $# in
                1)
                        min=1
                        max=$1
                        step=1
                        ;;
                2)
                        min=$1
                        max=$2
                        step=1
                        ;;
                3)
                        min=$1
                        max=$3
                        step=$2
                        ;;
                *)
                        die "seq called with wrong parameters number"
        esac

        if [[ -z "${p}" ]]; then
                local reps
                # BSD userland
                if [[ ${step} != 0 ]]; then
                        reps=$(( ($max-$min) / $step +1 ))
                else
                        reps=0
                fi

                jot $reps $min $max $step
        else
                "${p}" $min $step $max
        fi
}

# Gets the linker flag to link to dlopen() function
dlopen_lib() {
        if [[ ${ELIBC} != *BSD ]]; then
                echo "-ldl"
        fi
}

# Gets the home directory for the specified user
# it's a wrap around egetent as the position of the home directory in the line
# varies depending on the os used.
#
# To use that, inherit eutils, not portability!
egethome() {
        ent=$(egetent passwd $1)

        if [[ "${USERLAND}" == "Darwin" || "${ELIBC}" == "FreeBSD" ]]; then
                # Darwin/OSX and FreeBSD uses position 9 to store the home dir
                cut -d: -f9 <<<${ent}
        else
                # Linux and NetBSD uses position 6 instead
                cut -d: -f6 <<<${ent}
        fi
}
1	# Copyright 1999-2005 Gentoo Foundation
2	# Distributed under the terms of the GNU General Public License v2
3	# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.1 2005/09/18 17:33:44 flameeyes Exp $
4	#
5	# Author: Diego Pettenò <flameeyes@gentoo.org>
6	#
7	# This eclass is created to avoid using non-portable GNUisms inside ebuilds
8	#
9	# NB: If you add anything, please comment it!
10
11	# treecopy orig1 orig2 orig3 .... dest
12	#
13	# mimic cp --parents copy, but working on BSD userland as well
14	treecopy() {
15	dest=${!#}
16	files_count=$#
17
18	while(( $# > 1 )); do
19	dirstruct=$(dirname "$1")
20	mkdir -p "${dest}/${dirstruct}"
21	cp -pPR "$1" "${dest}/${dirstruct}"
22
23	shift
24	done
25	}
26
27	# seq min max
28	#
29	# compatibility function that mimes seq command if not available
30	seq() {
31	local p
32	p=$(type -P seq)
33
34	case $# in
35	1)
36	min=1
37	max=$1
38	step=1
39	;;
40	2)
41	min=$1
42	max=$2
43	step=1
44	;;
45	3)
46	min=$1
47	max=$3
48	step=$2
49	;;
50	*)
51	die "seq called with wrong parameters number"
52	esac
53
54	if [[ -z "${p}" ]]; then
55	local reps
56	# BSD userland
57	if [[ ${step} != 0 ]]; then
58	reps=$(( ($max-$min) / $step +1 ))
59	else
60	reps=0
61	fi
62
63	jot $reps $min $max $step
64	else
65	"${p}" $min $step $max
66	fi
67	}
68
69	# Gets the linker flag to link to dlopen() function
70	dlopen_lib() {
71	if [[ ${ELIBC} != *BSD ]]; then
72	echo "-ldl"
73	fi
74	}
75
76	# Gets the home directory for the specified user
77	# it's a wrap around egetent as the position of the home directory in the line
78	# varies depending on the os used.
79	#
80	# To use that, inherit eutils, not portability!
81	egethome() {
82	ent=$(egetent passwd $1)
83
84	if [[ "${USERLAND}" == "Darwin" \|\| "${ELIBC}" == "FreeBSD" ]]; then
85	# Darwin/OSX and FreeBSD uses position 9 to store the home dir
86	cut -d: -f9 <<<${ent}
87	else
88	# Linux and NetBSD uses position 6 instead
89	cut -d: -f6 <<<${ent}
90	fi
91	}