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#!/bin/sh
# MAINTAINER: portmgr@FreeBSD.org
# $FreeBSD$

if [ -z "${STAGEDIR}" -o -z "${PREFIX}" -o -z "${LOCALBASE}" ]; then
    echo "STAGEDIR, PREFIX, LOCALBASE required in environment." >&2
    exit 1
fi

LF=$(printf '\nX')
LF=${LF%X}

warn() {
    echo "Warning: $@" >&2
}

err() {
    echo "Error: $@" >&2
}

shebangonefile() {
    local f interp rc

    f="$@"
    rc=0
    interp=$(sed -n -e '1s/^#![[:space:]]*\([^[:space:]]*\).*/\1/p;2q' "$f")
    case "$interp" in
    "") ;;
    /usr/bin/env) ;;
    ${LOCALBASE}/*) ;;
    ${PREFIX}/*) ;;
    /usr/bin/awk) ;;
    /usr/bin/sed) ;;
    /usr/bin/nawk) ;;
    /bin/csh) ;;
    /bin/sh) ;;
    *)
        err "${interp} is an invalid shebang you need USES=shebangfix for ${f#${STAGEDIR}${PREFIX}/}"
        rc=1
        ;;
    esac

    return ${rc}
}

shebang() {
    local f l link rc

    rc=0
    
    while read f; do
        [ -z "${f}" ] && continue
        shebangonefile "${f}" || rc=1
    # Use heredoc to avoid losing rc from find|while subshell
    done << EOF
$(find ${STAGEDIR}${PREFIX}/bin ${STAGEDIR}${PREFIX}/sbin ${STAGEDIR}${PREFIX}/libexec -type f -perm +111 2>/dev/null)
EOF
    while read l link; do
        [ -z "${l}" ] && continue
        case "${link}" in
        /*) f="${STAGEDIR}${link}" ;;
        *) f="${l%/*}/${link}" ;;
        esac
        if [ -f "${f}" ]; then
            shebangonefile "${f}" || rc=1
        fi
    # Use heredoc to avoid losing rc from find|while subshell
    done << EOF
$(find ${STAGEDIR}${PREFIX}/bin ${STAGEDIR}${PREFIX}/sbin ${STAGEDIR}${PREFIX}/libexec -type l -exec stat -f "%N %Y" {} + 2>/dev/null)
EOF

    return ${rc}
}

symlinks() {
    local rc

    rc=0

    while read l link; do
        [ -z "${l}" ] && continue
        case "${link}" in
            ${STAGEDIR}*)
                err "Bad symlinks ${l#${STAGEDIR}${PREFIX}/} pointing inside the stage directory"
                rc=1
                ;;
        esac
    # Use heredoc to avoid losing rc from find|while subshell
    done << EOF
$(find ${STAGEDIR} -type l -exec stat -f "%N %Y" {} +)
EOF

    return ${rc}
}

paths() {
    local rc

    rc=0

    while read f; do
        [ -z "${f}" ] && continue
        # Ignore false-positive/harmless files
        case "${f}" in
            */lib/ruby/gems/*/Makefile) continue ;;
            */lib/ruby/gems/*/Makefile.html) continue ;;
            */lib/ruby/gems/*/mkmf.log) continue ;;
        esac
        err "${f#${STAGEDIR}${PREFIX}/} is referring to ${STAGEDIR}"
        rc=1
    # Use heredoc to avoid losing rc from find|while subshell
    done << EOF
$(find ${STAGEDIR} -type f -exec grep -l "${STAGEDIR}" {} +)
EOF

    return ${rc}
}

# For now do not raise an error, just warnings
stripped() {
    [ -x /usr/bin/file ] || return # this is fatal
    [ -n "${STRIP}" ] || return 0
    find ${STAGEDIR} -type f -exec /usr/bin/file -nNF '' {} + | while
        read f output; do
        case "${output}" in
            ELF\ *\ executable,\ *FreeBSD*,\ not\ stripped*|ELF\ *\ shared\ object,\ *FreeBSD*,\ not\ stripped*)
                warn "${f#${STAGEDIR}${PREFIX}/} is not stripped consider using \${STRIP_CMD}"
                ;;
        esac
    done
}

desktopfileutils() {
    if [ -z "${USESDESKTOPFILEUTILS}" ]; then
        grep -q MimeType= ${STAGEDIR}${PREFIX}/share/applications/*.desktop 2>/dev/null &&
        warn "you need USES=desktop-file-utils"
    else
        grep -q MimeType= ${STAGEDIR}${PREFIX}/share/applications/*.desktop 2>/dev/null ||
        warn "you may not need USES=desktop-file-utils"
    fi
    return 0
}

sharedmimeinfo() {
    local f found

    found=0
    for f in ${STAGEDIR}${PREFIX}/share/mime/packages/*.xml; do
        [ "${f}" = "${STAGEDIR}${PREFIX}/share/mime/packages/*.xml" ] && break #no matches
        [ "${f}" = "${STAGEDIR}${PREFIX}/share/mime/packages/freedesktop.org.xml" ] && continue
        found=1
        break
    done
    if [ -z "${USESSHAREDMIMEINFO}" -a ${found} -eq 1 ]; then
        warn "you need USES=shared-mime-info"
    elif [ -n "${USESSHAREDMIMEINFO}" -a ${found} -eq 0 ]; then
        warn "you may not need USES=shared-mime-info"
    fi
    return 0
}

suidfiles() {
    local filelist

    filelist=`find ${STAGEDIR} -type f \
        \( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
        \( -perm -u+s -or -perm -g+s \)`
    if [ -n "${filelist}" ]; then
        warn "setuid files in the stage directory (are these necessary?):"
        ls -liTd ${filelist}
    fi
    return 0
}

libtool() {
    if [ -z "${USESLIBTOOL}" ]; then
        find ${STAGEDIR} -type f -name '*.la' | while read f; do
            grep -q 'libtool library' "${f}" &&
                warn ".la libraries found, port needs USES=libtool" &&
                return 0 || true
        done
        # The return above continues here.
    fi
}

checks="shebang symlinks paths stripped desktopfileutils sharedmimeinfo suidfiles libtool"

ret=0
cd ${STAGEDIR}
for check in ${checks}; do
    ${check} || ret=1
done

exit $ret