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+#!/bin/bash
+# Copyright 2011-2012 The Arch Linux Development Team
+# Copyright 2012 Luke Shumaker
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# Because of how we pull changes from devtools.git, some of the function
+# bodies are not indented. I appologize for my sins against the reader.
+
+# Any function beginning with "_makechrootpkg_" is basically a multiline
+# comment to minimize the diff. These functions may use different variable
+# names.
+
+# Otherwise, a function may be affected by the variables:
+# makepkg.conf
+# - PKGDEST
+# - SRCDEST
+# chroot.conf (and derived)
+# - CHROOT
+# - CHROOTCOPY
+# - rootdir # = $CHROOTDIR/$CHROOT/root
+# - copydir # = $CHROOTDIR/$CHROOT/$CHROOTCOPY
+# environment
+# - LIBREUSER # conf.sh
+# - LIBREHOME # conf.sh
+# - INCHROOT # libremakepkg
+# invocation
+# - repack
+
+[[ -n ${repack:-} ]] || repack=false
+
+_makechrootpkg_init() {
+m4_include(lib/common.sh)
+
+shopt -s nullglob
+
+makepkg_args='-s --noconfirm -L'
+repack=false
+update_first=false
+clean_first=false
+install_pkg=
+add_to_db=false
+run_namcap=false
+chrootdir=
+passeddir=
+
+default_copy=$USER
+[[ -n $SUDO_USER ]] && default_copy=$SUDO_USER
+[[ -z $default_copy || $default_copy = root ]] && default_copy=copy
+src_owner=${SUDO_USER:-$USER}
+}
+
+_makechrootpkg_usage() {
+ echo "Usage: ${0##*/} [options] -r <chrootdir> [--] [makepkg args]"
+ echo ' Run this script in a PKGBUILD dir to build a package inside a'
+ echo ' clean chroot. All unrecognized arguments passed to this script'
+ echo ' will be passed to makepkg.'
+ echo ''
+ echo ' The chroot dir consists of the following directories:'
+ echo ' <chrootdir>/{root, copy} but only "root" is required'
+ echo ' by default. The working copy will be created as needed'
+ echo ''
+ echo 'The chroot "root" directory must be created via the following'
+ echo 'command:'
+ echo ' mkarchroot <chrootdir>/root base base-devel sudo'
+ echo ''
+ echo "Default makepkg args: $makepkg_args"
+ echo ''
+ echo 'Flags:'
+ echo '-h This help'
+ echo '-c Clean the chroot before building'
+ echo '-u Update the working copy of the chroot before building'
+ echo ' This is useful for rebuilds without dirtying the pristine'
+ echo ' chroot'
+ echo '-d Add the package to a local db at /repo after building'
+ echo '-r <dir> The chroot dir to use'
+ echo '-I <pkg> Install a package into the working copy of the chroot'
+ echo '-l <copy> The directory to use as the working copy of the chroot'
+ echo ' Useful for maintaining multiple copies.'
+ echo " Default: $default_copy"
+ echo '-n Run namcap on the package'
+ exit 1
+}
+
+_makechrootpkg_parse_options_init() {
+while getopts 'hcudr:I:l:n' arg; do
+ case "$arg" in
+ h) usage ;;
+ c) clean_first=true ;;
+ u) update_first=true ;;
+ d) add_to_db=true ;;
+ r) passeddir="$OPTARG" ;;
+ I) install_pkg="$OPTARG" ;;
+ l) copy="$OPTARG" ;;
+ n) run_namcap=true; makepkg_args="$makepkg_args -i" ;;
+ *) makepkg_args="$makepkg_args -$arg $OPTARG" ;;
+ esac
+done
+
+# Canonicalize chrootdir, getting rid of trailing /
+chrootdir=$(readlink -e "$passeddir")
+
+if [[ ${copy:0:1} = / ]]; then
+ copydir=$copy
+else
+ [[ -z $copy ]] && copy=$default_copy
+ copydir="$chrootdir/$copy"
+fi
+
+# Pass all arguments after -- right to makepkg
+makepkg_args="$makepkg_args ${*:$OPTIND}"
+
+# See if -R was passed to makepkg
+for arg in ${*:$OPTIND}; do
+ if [[ $arg = -R ]]; then
+ repack=true
+ break
+ fi
+done
+
+if (( EUID )); then
+ die 'This script must be run as root.'
+fi
+
+if [[ ! -f PKGBUILD && -z $install_pkg ]]; then
+ die 'This must be run in a directory containing a PKGBUILD.'
+fi
+
+if [[ ! -d $chrootdir ]]; then
+ die "No chroot dir defined, or invalid path '$passeddir'"
+fi
+
+if [[ ! -d $chrootdir/root ]]; then
+ die "Missing chroot dir root directory. Try using: mkarchroot $chrootdir/root base base-devel sudo"
+fi
+
+umask 0022
+
+# Lock the chroot we want to use. We'll keep this lock until we exit.
+# Note this is the same FD number as in mkarchroot
+lock_open_write 9 "$copydir.lock" "Locking chroot copy '$copy'"
+}
+
+chroot_sync() {
+ if [[ $CHROOTCOPY = root ]]; then
+ error "Cannot sync the root copy with itself"
+ exit 1
+ fi
+ # Get a read lock on the root chroot to make
+ # sure we don't clone a half-updated chroot
+ lock_open_read 8 "$rootdir" \
+ "Waiting for existing lock on \`$rootdir' to be released"
+
+ stat_busy 'Creating clean working copy'
+ local use_rsync=false
+ if type -P btrfs >/dev/null; then
+ [[ -d $copydir ]] && btrfs subvolume delete "$copydir" &>/dev/null
+ btrfs subvolume snapshot "$rootdir" "$copydir" &>/dev/null ||
+ use_rsync=true
+ else
+ use_rsync=true
+ fi
+
+ if $use_rsync; then
+ mkdir -p "$copydir"
+ rsync -a --delete -q -W -x "$rootdir/" "$copydir"
+ fi
+ stat_done
+
+ # Drop the read lock again
+ lock_close 8
+}
+
+_makechrootpkg_install_pkg() {
+ pkgname="${install_pkg##*/}"
+ cp "$install_pkg" "$copydir/$pkgname"
+
+ mkarchroot -r "pacman -U /$pkgname --noconfirm" "$copydir"
+ ret=$?
+
+ rm "$copydir/$pkgname"
+
+ # Exit early, we've done all we need to
+ exit $ret
+}
+
+chroot_init() {
+# make sure the chroot exists
+librechroot -n "$CHROOT" -l "$CHROOTCOPY" -m
+
+mkdir -p "$copydir/build"
+mkdir -p "$copydir/pkgdest"
+mkdir -p "$copydir/srcdest"
+
+# Remove anything in there UNLESS -R (repack) was passed to makepkg
+$repack || rm -rf "$copydir"/build/*
+
+if [[ -r "$LIBREHOME/.gnupg/pubring.gpg" ]]; then
+ install -D "$LIBREHOME/.gnupg/pubring.gpg" "$copydir/build/.gnupg/pubring.gpg"
+fi
+rm -f "$copydir/build/.makepkg.conf"
+
+MAKEPKG_CONF="$copydir/etc/makepkg.conf" set_conf_makepkg PKGDEST /pkgdest
+MAKEPKG_CONF="$copydir/etc/makepkg.conf" set_conf_makepkg SRCDEST /srcdest
+
+if grep -q '^\[repo\]' "$copydir/etc/pacman.conf"; then
+ cat >> "$copydir/etc/makepkg.conf" <<EOF
+[repo]
+SigLevel = Optional TrustAll
+Server = file:///repo
+EOF
+fi
+
+_let_nobody_use_pacman
+}
+
+chroot_copy_in() {
+# Copy PKGBUILD and sources
+cp PKGBUILD "$copydir/build/"
+(
+ set +euE
+ source PKGBUILD
+ # Copy source files
+ for file in "${source[@]}"; do
+ file="${file%%::*}"
+ file="${file##*://*/}"
+ if [[ -f $file ]]; then
+ cp "$file" "$copydir/srcdest/"
+ elif [[ -f $SRCDEST/$file ]]; then
+ cp "$SRCDEST/$file" "$copydir/srcdest/"
+ fi
+ done
+
+ # Find all changelog and install files, even inside functions
+ for i in 'changelog' 'install'; do
+ while read -r file; do
+ # evaluate any bash variables used
+ eval file=\"$(sed 's/^\(['\''"]\)\(.*\)\1$/\2/' <<< "$file")\"
+ [[ -f $file ]] && cp "$file" "$copydir/build/"
+ done < <(sed -n "s/^[[:space:]]*$i=//p" PKGBUILD)
+ done
+)
+
+chown -R nobody "$copydir"/{build,pkgdest,srcdest}
+}
+
+_let_nobody_use_pacman() {
+cat > "$copydir/etc/sudoers.d/nobody-pacman" <<EOF
+Defaults env_keep += "HOME"
+nobody ALL = NOPASSWD: /usr/bin/pacman
+EOF
+chmod 440 "$copydir/etc/sudoers.d/nobody-pacman"
+}
+
+chroot_exec() {
+local HASNET=true
+[[ $1 == -N ]] && { HASNET=false; shift; }
+
+local cmd="$*"
+# This is a little gross, but this way the script is recreated every time in the
+# working copy
+cat >"$copydir/chrootexec" <<EOF
+#!/bin/bash
+. /etc/profile
+${INCHROOT} || export HOME=/build
+${INCHROOT} || cd /build
+
+${cmd}
+EOF
+chmod 755 "$copydir/chrootexec"
+
+local flags=''
+if $INCHROOT; then
+ $HASNET || flags='-n'
+ unshare $flags -- /chrootexec
+else
+ $HASNET || flags='-N'
+ librechroot $flags -n "$CHROOT" -l "$CHROOTCOPY" -r /chrootexec
+fi
+}
+
+add_to_local_repo() {
+ for pkgfile in "$copydir"/pkgdest/*.pkg.tar*; do
+ if true; then
+ mkdir -p "$copydir/repo"
+ pushd "$copydir/repo" >/dev/null
+ cp "$pkgfile" .
+ repo-add repo.db.tar.gz "${pkgfile##*/}"
+ popd >/dev/null
+ fi
+ done
+}
+_chroot_copy_out_pkgs() {
+ for pkgfile in "$copydir"/pkgdest/*.pkg.tar*; do
+ chown "$LIBREUSER" "$pkgfile"
+ mv "$pkgfile" "$PKGDEST"
+ if [[ $PKGDEST != . ]]; then
+ ln -s "$PKGDEST/${pkgfile##*/}" .
+ fi
+ done
+}
+
+_chroot_copy_out_logs() {
+ for l in "$copydir"/build/*.log; do
+ chown "$LIBREUSER" "$l"
+ [[ -f $l ]] && mv "$l" .
+ done
+}
+
+_chroot_copy_out_srcs() {
+for f in "$copydir"/srcdest/*; do
+ chown "$LIBREUSER" "$f"
+ mv "$f" "$SRCDEST"
+done
+}
+
+chroot_copy_out() {
+ _chroot_copy_out_pkgs
+ _chroot_copy_out_logs
+ _chroot_copy_out_srcs
+}