major restructure, builds ok up to end of stage2

7 files changed, 592 insertions, 98 deletions

diff --git a/src/shared/checks.sh b/src/shared/checks.sh
new file mode 100644
index 0000000..57bb646
--- /dev/null
+++ b/src/shared/checks.sh
@@ -0,0 +1,153 @@
+#!/bin/bash
+ ##############################################################################
+ #                      parabola-riscv64-bootstrap                            #
+ #                                                                            #
+ #    Copyright (C) 2018  Andreas Grapentin                                   #
+ #                                                                            #
+ #    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, either version 3 of the License, or       #
+ #    (at your option) any later version.                                     #
+ #                                                                            #
+ #    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.                            #
+ #                                                                            #
+ #    You should have received a copy of the GNU General Public License       #
+ #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
+ ##############################################################################
+
+check_exe() {
+  local OPTIND o r=
+  while getopts "r" o; do
+    case "$o" in
+      r) r=yes ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-r] program ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  local v res=0
+  for v in "$@"; do
+    echo -n "checking for $v in \$PATH ... "
+
+    local have_exe=yes
+    type -p "$v" >/dev/null || have_exe=no
+    echo $have_exe
+
+    if [ "x$have_exe" != "xyes" ]; then
+      [ "x$r" == "xyes" ] && die -e "$ERROR_MISSING" "missing $v in \$PATH"
+      res="$ERROR_MISSING"
+    fi
+  done
+
+  return "$res"
+}
+
+check_file() {
+  local OPTIND o r=
+  while getopts "r" o; do
+    case "$o" in
+      r) r=yes ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-r] file ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  local v res=0
+  for v in "$@"; do
+    echo -n "checking for $v ... "
+
+    local have_file=yes
+    [ -f "$v" ] || have_file=no
+    echo $have_file
+
+    if [ "x$have_file" != "xyes" ]; then
+      [ "x$r" == "xyes" ] && die -e "$ERROR_MISSING" "missing $v in filesystem"
+      res="$ERROR_MISSING"
+    fi
+  done
+
+  return "$res"
+}
+
+check_gpgkey() {
+  local OPTIND o r=
+  while getopts "r" o; do
+    case "$o" in
+      r) r=yes ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-r] key" ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  local v res=0
+  for v in "$@"; do
+    echo -n "checking for key $v ... "
+
+    local have_key=yes
+    sudo -u "$SUDO_USER" gpg --list-keys "$v" &>/dev/null || have_key=no
+    echo $have_key
+
+    if [ "x$have_key" != "xyes" ]; then
+      [ "x$r" == "xyes" ] && die -e "$ERROR_MISSING" "missing $v in keyring"
+      res="$ERROR_MISSING"
+    fi
+  done
+
+  return "$res"
+}
+
+check_pkgfile() {
+  local OPTIND o r=
+  while getopts "r" o; do
+    case "$o" in
+      r) r=yes ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-r] key" ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  echo -n "checking for built package $2 ... "
+
+  local pkgfile have_pkgfile=yes
+  pkgfile=$(find "$1" -regex "^.*/$2-[^-]*-[^-]*-[^-]*\\.pkg\\.tar\\.xz\$")
+  [ -n "$pkgfile" ] || have_pkgfile=no
+  echo $have_pkgfile
+
+  if [ "x$have_pkgfile" != "xyes" ]; then
+    [ "x$r" == "xyes" ] && die -e "$ERROR_MISSING" "missing package $2 in $1"
+    return "$ERROR_MISSING"
+  fi
+}
+
+check_repo() {
+  local OPTIND o r=
+  while getopts "r" o; do
+    case "$o" in
+      r) r=yes ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-r] repo ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  local path="$1"
+  shift
+
+  local v res=0
+  for v in "$@"; do
+    echo -n "checking for repo $v ... "
+
+    local have_repo=yes
+    [ -e "$path/$v.db" ] || have_repo=no
+    echo $have_repo
+
+    if [ "x$have_repo" != "xyes" ]; then
+      [ "x$r" == "xyes" ] && die -e "$ERROR_MISSING" "missing [$v] in $path"
+      res="$ERROR_MISSING"
+    fi
+  done
+
+  return "$res"
+}
diff --git a/src/shared/common.sh b/src/shared/common.sh
index 46ba6ca..0a11251 100644
--- a/src/shared/common.sh
+++ b/src/shared/common.sh
@@ -18,90 +18,75 @@
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
  ##############################################################################
 
-set -euo pipefail
+# shellcheck source=src/shared/feedback.sh
+. "$TOPSRCDIR"/shared/feedback.sh
+# shellcheck source=src/shared/checks.sh
+. "$TOPSRCDIR"/shared/checks.sh
+# shellcheck source=src/shared/srcinfo.sh
+. "$TOPSRCDIR"/shared/srcinfo.sh
+# shellcheck source=src/shared/pacman.sh
+. "$TOPSRCDIR"/shared/pacman.sh
+# shellcheck source=src/shared/upstream.sh
+. "$TOPSRCDIR"/shared/upstream.sh
+# shellcheck source=src/shared/deptree.sh
+. "$TOPSRCDIR"/shared/deptree.sh
 
 retry() {
-  for i in $(seq $(expr $1 - 1)); do
-    "${@:3}" && return 0 || sleep $2;
+  local OPTIND o n=5 s=60
+  while getopts "n:s:" o; do
+    case "$o" in
+      n) n="$OPTARG" ;;
+      s) s="$OPTARG" ;;
+      *) die -e $ERROR_INVOCATION "Usage: ${FUNCNAME[0]} [-n tries] [-s delay] cmd ..." ;;
+    esac
   done
-  "${@:3}" || return;
-}
-
-import_keys() {
-  local keys="$(source ${1:-PKGBUILD} && echo "${validpgpkeys[@]}")"
-  if [ -n "$keys" ]; then
-    local key
-    for key in $keys; do
-      echo -n "checking for key $key ... "
-      sudo -u $SUDO_USER gpg --list-keys $key &>/dev/null && _have_key=yes || _have_key=no
-      echo $_have_key
-      if [ "x$_have_key" == "xno" ]; then
-        retry 5 60 sudo -u $SUDO_USER gpg --recv-keys $key \
-          || die "failed to import key $key"
-      fi
-    done
-  fi
-}
+  shift $((OPTIND-1))
 
-_fetch_pkgfiles_from() {
-  curl -sL $url | grep -iq 'not found' && return 1
-  local src=$(curl -sL $url | grep -i 'source files' | cut -d'"' -f2 | sed 's#/tree/#/plain/#')
-  for link in $(curl -sL $src | grep '^  <li><a href' | cut -d"'" -f2 \
-      | sed "s#^#$(echo $src | awk -F/ '{print $3}')#"); do
-    wget -q $link -O $(basename ${link%\?*});
+  for _ in $(seq "$((n - 1))"); do
+    "$@" && return 0
+    sleep "$s"
   done
-  [ -f PKGBUILD ] || return 1
+  "$@" || return
 }
 
-fetch_pkgfiles() {
-  # acquire the pkgbuild and auxiliary files
-  local url=https://www.parabola.nu/packages/libre/x86_64/$1/
-  _fetch_pkgfiles_from $url && echo "libre" > .REPO && return
+prepare_makepkgdir() {
+  rm -rf "$1"
+  mkdir -p "$1"
+  chown -R "$SUDO_USER" "$1"
 
-  local repo
-  for repo in core extra community; do
-    url=https://www.archlinux.org/packages/$repo/x86_64/$1/
-    _fetch_pkgfiles_from $url && echo "$repo" > .REPO && return
-  done
-  die "$1: failed to fetch pkgfiles"
+  pushd "$1" >/dev/null || return 1
 }
 
-prepare_makepkgdir() {
-  rm -rf "$_makepkgdir"/$_pkgname
-  mkdir -p "$_makepkgdir"/$_pkgname
-  pushd "$_makepkgdir"/$_pkgname >/dev/null
-  chown -R $SUDO_USER "$_makepkgdir"/$_pkgname
+find_lastlog() {
+  local log
+  # shellcheck disable=SC2010
+  log=$(ls -t "$1" | grep -P "^$2(-[^-]*){3}-(pkgver|prepare|build|package)" | head -n1)
+  [ -n "$log" ] && echo "$log"
 }
 
-failed_build() {
-  _log=$(find "$_logdest" -type f -iname "$1-*" -printf "%T@ %p\n" \
-      | sort -n | tail -n1 | cut -d' ' -f2-)
-  set +o pipefail
-  _phase=""
-  [ -z "$_log" ] || _phase=$(cat $_log | grep '==>.*occurred in' \
-      | awk '{print $7}' | sed 's/().*//')
-  set -o pipefail
-  if [ -n "${_phase:-}" ]; then
-    notify -c error "$_pkgname: error in $_phase()" -h string:document:"$_log"
-  else
-    notify -c error "$_pkgname: error in makepkg"
-  fi
-  [ "x$KEEP_GOING" == "xyes" ] || die "error building $_pkgname"
-  _build_failed=yes
+binfmt_enable() {
+  echo 1 > /proc/sys/fs/binfmt_misc/status
 }
 
-make_realdep() {
-  local dep
-
-  dep="$1"
-  _realdep=$(pacman --noconfirm -Sddw "$dep" \
-    | grep '^Packages' | awk '{print $3}')
-  [ -n "$_realdep" ] && _realdep="${_realdep%-*-*}" && return 0
+binfmt_disable() {
+  echo 0 > /proc/sys/fs/binfmt_misc/status
+}
 
-  dep="$(echo "$dep" | sed 's/[<>=].*//')"
-  _realdep=$(pacman --noconfirm -Sddw "$dep" \
-    | grep '^Packages' | awk '{print $3}')
-  [ -n "$_realdep" ] && _realdep="${_realdep%-*-*}" && return 0
+#failed_build() {
+#  # FIXME
+#  _log=$(find "$_logdest" -type f -iname "$1-*" -printf "%T@ %p\n" \
+#      | sort -n | tail -n1 | cut -d' ' -f2-)
+#  set +o pipefail
+#  _phase=""
+#  [ -z "$_log" ] || _phase=$(cat $_log | grep '==>.*occurred in' \
+#      | awk '{print $7}' | sed 's/().*//')
+#  set -o pipefail
+#  if [ -n "${_phase:-}" ]; then
+#    notify -c error "$_pkgname: error in $_phase()" -h string:document:"$_log"
+#  else
+#    notify -c error "$_pkgname: error in makepkg"
+#  fi
+#  [ "x$KEEP_GOING" == "xyes" ] || die "error building $_pkgname"
+#  _build_failed=yes
+#}
 
-  return 0
-}
diff --git a/src/shared/deptree.sh b/src/shared/deptree.sh
new file mode 100644
index 0000000..ffc0af8
--- /dev/null
+++ b/src/shared/deptree.sh
@@ -0,0 +1,103 @@
+#!/bin/bash
+ ##############################################################################
+ #                      parabola-riscv64-bootstrap                            #
+ #                                                                            #
+ #    Copyright (C) 2018  Andreas Grapentin                                   #
+ #                                                                            #
+ #    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, either version 3 of the License, or       #
+ #    (at your option) any later version.                                     #
+ #                                                                            #
+ #    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.                            #
+ #                                                                            #
+ #    You should have received a copy of the GNU General Public License       #
+ #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
+ ##############################################################################
+
+check_deptree() {
+  echo -n "checking for complete deptree ... "
+
+  local have_deptree=yes
+  [ -f "$DEPTREE".FULL ] || have_deptree=no
+  echo $have_deptree
+
+  [ "x$have_deptree" == "xyes" ] || return "$ERROR_MISSING"
+}
+
+build_deptree() {
+  check_exe ed pacman sed || return
+
+  # create empty deptree
+  truncate -s0 "$DEPTREE".FULL
+
+  # add the packages listed in the given groups
+  local g p r
+  for g in "$@"; do
+    for p in $(pacman -Sg "$g" | awk '{print $2}'); do
+      r=$(make_realpkg "$p") || return "$ERROR_MISSING"
+
+      if ! grep -q "^$r :" "$DEPTREE".FULL; then
+        echo "$r : [ ] # $g" >> "$DEPTREE".FULL
+      else
+        sed -i "s/^$r : \\[.*/&, $g/" "$DEPTREE".FULL
+      fi
+    done
+  done
+}
+
+prepare_deptree() {
+  check_deptree || build_deptree "$@" || return
+
+  [ -f "$DEPTREE" ] || cp "$DEPTREE"{.FULL,}
+  chown "$SUDO_USER" "$DEPTREE"{,.FULL}
+}
+
+deptree_next() {
+  local pkg
+  pkg=$(grep '\[ *\]' "$DEPTREE" | tail -n1 | awk '{print $1}')
+  [ -n "$pkg" ] || return "$ERROR_MISSING"
+  echo "$pkg"
+}
+
+deptree_remove() {
+  sed -i "/^$1 :/d; s/ /  /g; s/ $1 / /g; s/  */ /g" "$DEPTREE"
+}
+
+deptree_check_depends() {
+  local OPTIND o needed=yes
+  while getopts "n" o; do
+    case "$o" in
+      n) needed=no ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-p] deptree pkgname depend" ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  local pkg="$1"
+  shift
+
+  local dep r res=0
+  # shellcheck disable=SC2068
+  for dep in $@; do
+    r=$(make_realpkg "$dep") || { res="$ERROR_MISSING"; continue; }
+
+    local have_pkg=yes
+    check_pkgfile "$PKGDEST" "$r" || have_pkg=no
+
+    if ! grep -q "^$r :" "$DEPTREE".FULL; then
+      echo "$r : [ ] # $pkg" >> "$DEPTREE".FULL
+      echo "$r : [ ] # $pkg" >> "$DEPTREE"
+    else
+      sed -i "/#.* $pkg\\(\\$\\|[ ,]\\)/! s/^$r : \\[.*/&, $pkg/" "$DEPTREE"{,.FULL}
+    fi
+    if [ "x$needed" == "xyes" ] && [ "x$have_pkg" == "xno" ]; then
+      sed -i "s/^$pkg : \\[/& $r/" "$DEPTREE"{,.FULL}
+    fi
+  done
+
+  return "$res"
+}
diff --git a/src/shared/feedback.sh b/src/shared/feedback.sh
index 6b766ff..39e0a0c 100644
--- a/src/shared/feedback.sh
+++ b/src/shared/feedback.sh
@@ -18,45 +18,67 @@
  #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
  ##############################################################################
 
-set -euo pipefail
-
-# output formatting
-export BO=$(tput bold)
-export NO=$(tput sgr0)
-export RE=$(tput setf 4)
-export GR=$(tput setf 2)
-export WH=$(tput setf 7)
+# error codes
+export ERROR_UNSPECIFIED=1
+export ERROR_INVOCATION=2
+export ERROR_MISSING=3
+export ERROR_BUILDFAIL=4
+export ERROR_KEYFAIL=5
 
 # messaging functions
 notify() {
   # useful if running notify_telegram
-  local recipient=-211578786
+  local recipient=260151125
+  #local recipient=-211578786
   if type -p notify-send >/dev/null; then
-    machinectl -q shell --uid=$SUDO_USER .host \
-      $(which notify-send) -h string:recipient:$recipient "$@" >/dev/null
+    machinectl -q shell --uid="$SUDO_USER" .host \
+      "$(which notify-send)" -h string:recipient:$recipient "$@" >/dev/null
   fi
 }
 
-die() {
-  echo "$BO$RE==> ERROR:$WH $*$NO" 1>&2
-  notify -c error *Error:* "$(caller): $*"
-  trap - ERR
-  exit 1;
-}
-
 msg() {
-  echo "$BO$GR==>$WH $*$NO";
+  local OPTIND o n='' d=()
+  while getopts "d:n" o; do
+    case "$o" in
+      n) n=yes ;;
+      d) d=(-h string:document:"$OPTARG") ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-n] [-d file] msg ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  [ "x$n" == "xyes" ] && notify "${d[@]}" "$*"
+  echo "$(tput bold)$(tput setf 2)==>$(tput setf 7) $*$(tput sgr0)";
 }
 
-trap "die unknown error" ERR
+error() {
+  local OPTIND o n='' d=()
+  while getopts "d:n" o; do
+    case "$o" in
+      n) n=yes ;;
+      d) d=(-h string:document:"$OPTARG") ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-n] [-d file] msg ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
 
-# host system check helpers
-check_exe() {
-  echo -n "checking for $1 ... "
-  type -p $1 >/dev/null && echo yes || (echo no && die "missing ${2:-$1} in \$PATH")
+  [ "x$n" == "xyes" ] && notify -c error "${d[@]}" "$*"
+  echo "$(tput bold)$(tput setf 4)==> ERROR:$(tput setf 7) $*$(tput sgr0)" 1>&2
 }
 
-check_file() {
-  echo -n "checking for $1 ... "
-  [ -f "$1" ] && echo yes || (echo no && die "missing ${2:-$1} in filesystem")
+die() {
+  local OPTIND o e="$ERROR_UNSPECIFIED" d=()
+  while getopts "e:d:" o; do
+    case "$o" in
+      e) e="$OPTARG" ;;
+      d) d=(-d "$OPTARG") ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-e status] [-d file] msg ..." ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  error -n "${d[@]}" "$*"
+  trap - ERR
+  exit "$e"
 }
+trap 'die "unknown error"' ERR
diff --git a/src/shared/pacman.sh b/src/shared/pacman.sh
new file mode 100644
index 0000000..fde78e7
--- /dev/null
+++ b/src/shared/pacman.sh
@@ -0,0 +1,81 @@
+#!/bin/bash
+ ##############################################################################
+ #                      parabola-riscv64-bootstrap                            #
+ #                                                                            #
+ #    Copyright (C) 2018  Andreas Grapentin                                   #
+ #                                                                            #
+ #    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, either version 3 of the License, or       #
+ #    (at your option) any later version.                                     #
+ #                                                                            #
+ #    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.                            #
+ #                                                                            #
+ #    You should have received a copy of the GNU General Public License       #
+ #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
+ ##############################################################################
+
+import_keys() {
+  local keys k
+  keys="$(srcinfo_validpgpkeys)"
+  for k in $keys; do
+    check_gpgkey "$k" && continue
+    if ! retry -n 5 -s 60 sudo -u "$SUDO_USER" gpg --recv-keys "$k"; then
+      error -n "failed to import key '$k'"
+      return "$ERROR_KEYFAIL"
+    fi
+  done
+}
+
+pkgdeps() {
+  pacman -Si "$1" | grep '^Depends' | cut -d':' -f2 | sed 's/None//'
+}
+
+pkgarch() {
+  local pkgarch
+  pkgarch=$(pacman -Si "$1" | grep '^Architecture' | awk '{print $3}') || return
+  [ -n "$pkgarch" ] || return
+
+  # set arch to $CARCH, unless it is any
+  [ "x$pkgarch" == "xany" ] || pkgarch="$CARCH"
+  echo "$pkgarch"
+}
+
+pkgver() {
+  local pkgver
+  pkgver=$(pacman -Si "$1" | grep '^Version' | awk '{print $3}') || return
+  [ -n "$pkgver" ] || return
+  echo "$pkgver"
+}
+
+make_realpkg() {
+  local dep realpkg
+
+  dep="$1"
+  realpkg=$(pacman --noconfirm -Sddw "$dep" | grep '^Packages' | awk '{print $3}')
+  [ -n "$realpkg" ] && echo "${realpkg%-*-*}" && return 0
+
+  dep="$(sed 's/[<>=].*//' <<< "$dep")"
+  realpkg=$(pacman --noconfirm -Sddw "$dep" | grep '^Packages' | awk '{print $3}')
+  [ -n "$realpkg" ] && echo "${realpkg%-*-*}" && return 0
+
+  return "$ERROR_MISSING"
+}
+
+make_repo() {
+  local path=$1
+  shift
+
+  mkdir -p "$path" || return
+
+  local v
+  for v in "$@"; do
+    tar -czf "$path"/"$v".db.tar.gz -T /dev/null
+    tar -czf "$path"/"$v".files.tar.gz -T /dev/null
+    ln -s "$v".db.tar.gz "$path"/"$v".db
+    ln -s "$v".files.tar.gz "$path"/"$v".files
+  done
+}
diff --git a/src/shared/srcinfo.sh b/src/shared/srcinfo.sh
new file mode 100644
index 0000000..906ce9d
--- /dev/null
+++ b/src/shared/srcinfo.sh
@@ -0,0 +1,57 @@
+#!/bin/bash
+ ##############################################################################
+ #                      parabola-riscv64-bootstrap                            #
+ #                                                                            #
+ #    Copyright (C) 2018  Andreas Grapentin                                   #
+ #                                                                            #
+ #    This program is free software: you can redistribute it and/or modify    #
+ #    it under the terms of the GNU General Public License as published by    #
+ #    the Free Software Foundation, either version 3 of the License, or       #
+ #    (at your option) any later version.                                     #
+ #                                                                            #
+ #    This program is distributed in the hope that it will be useful,         #
+ #    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+ #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+ #    GNU General Public License for more details.                            #
+ #                                                                            #
+ #    You should have received a copy of the GNU General Public License       #
+ #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
+ ##############################################################################
+
+makesrcinfo() {
+  if [ ! -f .SRCINFO ] || [ .SRCINFO -ot PKGBUILD ]; then
+    (sudo -u "$SUDO_USER" makepkg --printsrcinfo) > .SRCINFO
+  fi
+}
+
+srcinfo_validpgpkeys() {
+  makesrcinfo
+  grep 'validpgpkeys =' .SRCINFO | awk '{print $3}'
+}
+
+srcinfo_pkgbase() {
+  makesrcinfo
+  grep '^pkgbase =' .SRCINFO | awk '{print $3}'
+}
+
+srcinfo_builddeps() {
+  local OPTIND o n='check\|' m='make\|'
+  while getopts "nm" o; do
+    case "$o" in
+      n) n='' ;;
+      m) m='' ;;
+      *) die -e "$ERROR_INVOCATION" "Usage: ${FUNCNAME[0]} [-n]" ;;
+    esac
+  done
+  shift $((OPTIND-1))
+
+  makesrcinfo
+  awk '/^pkgbase = /,/^$/{print}' < .SRCINFO \
+    | grep "	\\($m$n\\)depends =" | awk '{print $3}'
+}
+
+srcinfo_rundeps() {
+  makesrcinfo
+  awk '/^pkgname = '"$1"'$/,/^$/{print}' < .SRCINFO \
+    | grep '	depends =' | awk '{print $3}'
+}
diff --git a/src/shared/upstream.sh b/src/shared/upstream.sh
new file mode 100644
index 0000000..d310be7
--- /dev/null
+++ b/src/shared/upstream.sh
@@ -0,0 +1,93 @@
+#!/bin/bash
+ ##############################################################################
+ #                      parabola-riscv64-bootstrap                            #
+ #                                                                            #
+ #    Copyright (C) 2018  Andreas Grapentin                                   #
+ #                                                                            #
+ #    This program is free software: you can redistribute it and/or modify    #
+ #    it under the terms of the GNU General Public License as published by    #
+ #    the Free Software Foundation, either version 3 of the License, or       #
+ #    (at your option) any later version.                                     #
+ #                                                                            #
+ #    This program is distributed in the hope that it will be useful,         #
+ #    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+ #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+ #    GNU General Public License for more details.                            #
+ #                                                                            #
+ #    You should have received a copy of the GNU General Public License       #
+ #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
+ ##############################################################################
+
+package_get_upstream_repo() {
+  local repo url response target=
+  for repo in core extra community; do
+    url=https://www.archlinux.org/packages/$repo/x86_64/$1/
+    response=$(retry -n 5 -s 60 curl -sL "$url") || die "failed to retrieve url $url"
+    grep -iq "Arch Linux - $1" <<< "$response" || continue
+
+    target=$repo
+    break
+  done
+  [ -z "$target" ] || target=libre
+  echo $target
+}
+
+package_fetch_upstream_pkgfiles() {
+  # fetch upstream pkgbuilds from arch
+  local repo repoinfo pkgbase
+  repoinfo=$(asp list-repos "$1") || repoinfo=""
+  repo=$(grep -P '^(core|extra|community)' <<< "$repoinfo" | head -n1)
+  pkgbase=$(grep -o 'part of package .*' <<< "$repoinfo" | awk '{print $4}')
+
+  [ -z "$repo" ] && repo=libre
+  [ -z "$pkgbase" ] && pkgbase="$1"
+
+  mkdir -p .arch
+  asp export "$repo/$1" >/dev/null
+  mv "$pkgbase"/* .arch/
+  rm -rf "$pkgbase"
+
+  # fetch upstream pkgbuilds from parabola
+  mkdir -p .parabola
+  local src url=https://www.parabola.nu/packages/libre/x86_64/$1/
+  if ! curl -sL "$url" | grep -iq 'not found'; then
+    src=$(curl -sL "$url" | grep -i 'source files' | cut -d'"' -f2 | sed 's#/tree/#/plain/#')
+    for link in $(curl -sL "$src" | grep '^  <li><a href' | cut -d"'" -f2 \
+        | sed "s#^#$(echo "$src" | awk -F/ '{print $3}')#"); do
+      wget -q "$link" -O .parabola/"$(basename "${link%\?*}")";
+    done
+  fi
+
+  if [ -f .parabola/PKGBUILD ]; then
+    cp -v .parabola/* .
+  elif [ -f .arch/PKGBUILD ]; then
+    cp -v .arch/* .
+  else
+    return "$ERROR_MISSING"
+  fi
+}
+
+#package_fetch_upstream_pkgfiles() {
+#  FIXME
+#  # acquire the pkgbuild and auxiliary files
+#  local url=https://www.parabola.nu/packages/libre/x86_64/$1/
+#  _fetch_pkgfiles_from $url && echo "libre" > .REPO && return
+#
+#  local repo
+#  for repo in core extra community; do
+#    url=https://www.archlinux.org/packages/$repo/x86_64/$1/
+#    _fetch_pkgfiles_from $url && echo "$repo" > .REPO && return
+#  done
+#  die "$1: failed to fetch pkgfiles"
+#}
+#
+#_fetch_pkgfiles_from() {
+#  curl -sL $url | grep -iq 'not found' && return 1
+#  local src=$(curl -sL $url | grep -i 'source files' | cut -d'"' -f2 | sed 's#/tree/#/plain/#')
+#  for link in $(curl -sL $src | grep '^  <li><a href' | cut -d"'" -f2 \
+#      | sed "s#^#$(echo $src | awk -F/ '{print $3}')#"); do
+#    wget -q $link -O $(basename ${link%\?*});
+#  done
+#  [ -f PKGBUILD ] || return 1
+#}
+