toru


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#!/bin/bash
# Queries the ABS
# License: GPL3

## TODO
# * Add license text
# * Create symlinks from pkgbase to pkgname[@] for easy package finding
# * Use lastsync to store processed packages

## GOALS
# * Have a searchable database of PKGBUILD metadata
# * Have an interface for source-only builds
# * Possibility to hook up ABS dirs besides ABSROOT (low priority)
# * Tell updates and non available binary packages (working on this)

 source /etc/abs.conf
 source /etc/libretools.conf

# Stores the lastsync date
 lastsync() {
     [ -e ${lastsyncfile} -a ! -w ${lastsyncfile} ] && {
         error "The sync date can't be saved. ${lastsyncfile} isn't writable."
         return 1
     }

     date +%s > ${lastsyncfile}
     touch ${lastsyncfile}
 }

##
#  usage : get_full_version( $epoch, $pkgver, $pkgrel )
# return : full version spec, including epoch (if necessary), pkgver, pkgrel
##
 get_full_version() {
     if [[ $1 -eq 0 ]]; then
        # zero epoch case, don't include it in version
         echo $2-$3
     else
         echo $1:$2-$3
     fi
 }

# Outputs an ordered package-fullpkgver array
 print_package_array() {
     echo "$@" | tr " " "\n" | sort -V -u
 }


# Gets repo.db contents (unordered)
# $1 repo
 get_db_contents() {
     [ ! -r /var/lib/pacman/sync/$1.db ] && return 0

  bsdtar -tf /var/lib/pacman/sync/$1.db | cut -d'/' -f1
}


# Get the pkgname
extract_pkgname() {
  echo "$@" | tr " " "\n" | sed "s/^\(.\+\)-[^-]\+-[^-]\+$/\1/"
}

# Get the fullpkgver 
extract_fullpkgver() {
  echo "$@" | tr " " "\n" | sed "s/^.\+-\([^-]\+-[^-]\+\)$/\1/"
}


# Updates the database by finding all PKGBUILDS
# Workflow:
# * Find all PKGBUILDs on the ABS repo specified
# * Get all packages already on package repos
# * Compare them
# Args:
 update() {
# The PKGBUILDs found
     local pkgbuilds=()
# The list of pkgname-fullpkgver
     local packages_to_sync=()
     local packages_in_sync=()
     local needed_updates=()
     local old_versions=()

# Find all the PKGBUILDs newer than the last update
# Update newer, otherwise everything
     if [ $force ] || [ ! -e ${lastsyncfile} ]; then
         $quiet || msg "Forcing upgrade"
         pkgbuilds=($(find ${@} -maxdepth 2 -type f -name 'PKGBUILD'))
     else
         pkgbuilds=($(find ${@} -maxdepth 2 -type f -name 'PKGBUILD' -newer ${lastsyncfile}))
     fi

# Inform how many PKGBUILDS were found and quit immediately if none
     $quiet || msg "Found $((${#pkgbuilds[*]}-1)) packages to update"
     [ ${#pkgbuilds[*]} -eq 1 ] && {
         $quiet || msg2 "There's nothing to be done. Phew!"
         exit 0
     }

     for _pkgbuild in ${pkgbuilds[@]}; do

# The repo name is guessed
# You *must* use repo/pkgbase structure
         _pkgpath=$(dirname "${_pkgbuild}")
         _pkgbase=$(basename "${_pkgpath}")
         _pkgrepo=$(basename $(dirname "${_pkgpath}"))

         source ${_pkgbuild}

         for _pkg in ${pkgname[@]}; do
# Fill the list of packages to find
             packages_to_sync+=($_pkg-$(get_full_version ${epoch:-0} $pkgver $pkgrel))
         done

         unset pkgbase pkgname pkgver pkgrel source epoch
     done

# Get repo database contents
     packages_in_sync=($(get_db_contents ${_pkgrepo}))
     print_package_array "${packages_to_sync[@]}" > ${TMPDIR}/packages_to_sync
     print_package_array "${packages_in_sync[@]}" > ${TMPDIR}/packages_in_sync

# We've orderer the files!
  needed_updates=($(comm --nocheck-order -32 ${TMPDIR}/packages_to_sync ${TMPDIR}/packages_in_sync))
  old_versions=($(comm --nocheck-order -31 ${TMPDIR}/packages_to_sync ${TMPDIR}/packages_in_sync))
  missing_packages=($(comm --nocheck-order -12 ${TMPDIR}/packages_to_sync ${TMPDIR}/packages_in_sync))

     $quiet || msg "This packages are available to update"
     for _update in ${needed_updates[@]}; do
         pkg=$(extract_pkgname $_update)

# Only print pkgnames when in quiet mode (useful for scripts)
    $quiet && echo $pkg
    $quiet || {
      ver=$(extract_fullpkgver $_update)
      oldver=$(extract_fullpkgver $(grep -w $pkg ${TMPDIR}/packages_in_sync))

             msg2 "$pkg $oldver => $ver"
         }

     done

#  lastsync

 }

# Find all the packages that are missing from the repo dbs (aka not built)
missing() {
  true
}


## MAIN
commands=()
repos=()
quiet=false
force=false
while getopts 'hqfum' arg; do
  case $arg in
    h) usage; exit 0 ;;
    q) quiet=true ;;
    f) force=true ;;
    u) commands+=(update);;
    m) commands+=(missing);;
  esac

  shift $((OPTIND-1))
done

# This is the syncfile, stores the last date as content and mtime
#lastsyncfile=${ABSROOT}/toru.lastsync

 TMPDIR=$(mktemp -d)

 [[ -z ${TMPDIR} ]] && exit 1

 ${commands[0]} ${@}

 rm -rf ${TMPDIR}

 exit $?