From 37fbad264b04cdecc015079ca24dc8f09eb77def Mon Sep 17 00:00:00 2001
From: Luke Shumaker <LukeShu@sbcglobal.net>
Date: Thu, 19 Jun 2014 20:20:11 -0400
Subject: libretools-ize libredbdiff

---
 src/abslibre-tools/libredbdiff | 280 ++++++++++++++++++++++++-----------------
 1 file changed, 164 insertions(+), 116 deletions(-)

(limited to 'src')

diff --git a/src/abslibre-tools/libredbdiff b/src/abslibre-tools/libredbdiff
index 67b3245..47e659f 100755
--- a/src/abslibre-tools/libredbdiff
+++ b/src/abslibre-tools/libredbdiff
@@ -17,125 +17,173 @@ mirrorlistarch="$baseconfpath/mirrorlist.archlinux"
 mirror='http://repo.parabolagnulinux.org/$repo/os/$arch'
 mirrorarch='http://mirrors.kernel.org/archlinux/$repo/os/$arch'
 
+. libremessages
+
+cmd="${0##*/}"
+
+downloadfile() {
+	local outfile=$1
+	local url=$2
+	local mesg=("${@:3}")
+	if [[ ! -e $outfile ]] ; then
+		msg "${mesg[@]}"
+		if wget -q "$url" -O "$outfile"; then
+			return 255
+		else
+			die "Failed to download %q. Exiting." "$outfile"
+		fi
+	elif [[ $init ]]; then
+		warning "%q already exists. Skipping." "$outfile"
+	fi
+}
 
-error() { echo -e "Error. $@" > /dev/stderr ; exit 1; }
-
-if [[ $# == 1 ]] ; then
-  [[ $1 == -n ]] && UPDATE=0
-  [[ $1 == -h ]] && { echo -e "${name}. Show [libre] packages that need to be updated from Arch repositories.\n\nUsage:\nlibredbdiff\t\tInitialize (first run) or update pacman databases\nlibredbdiff -n\t\tPrint results" ; exit 0 ; }
-elif [[ $# != 0 ]] ; then
-  error "Bad arguments. Nothing done."
-else
-  UPDATE=1
-fi
-
-if (( $UPDATE )) ; then
-  [[ $EUID != 0 ]] && { error "To initialize $name or update $name pacman databases, the script must be run as root. Nothing done." ; }
- 
-  [[ -d "$baseconfpath" && -d "$basedbpath" && -d "$dbpath" && -d "$dbpatharch" && -e "${conffile}" && -e "${conffilearch}" && -e "${mirrorlist}" && -e  "${mirrorlist}" ]] || { echo "${name} files are missing. Initializing." ; init=1 ; }
-
-  createdir() {
-    if [[ ! -e $1 ]] ; then
-      echo "Creating directory $1"
-      mkdir "$1" || error "Failed to create directory $1. Exiting."
-    else
-      [[ $init ]] && echo "Warning. ${1} already exists. Skipping."
-    fi
-  }
-  createdir "$baseconfpath"
-  createdir "$basedbpath"
-  createdir "$dbpath"
-  createdir "$dbpatharch"
-
-  downloadfile() {
-    if [[ ! -e $1 ]] ; then
-      echo "$2"
-      if wget -q "$3" -O "$1"; then
-	return 255
-      else
-        error "Failed to download ${1}. Exiting."
-      fi
-    else
-      [[ $init ]] && echo "Warning. ${1} already exists. Skipping."
-    fi
-  }
-  downloadfile "${conffile}" "Downloading Parabola pacman.conf" "https://projects.parabolagnulinux.org/abslibre.git/plain/libre/pacman/pacman.conf.x86_64"
-
-  downloadfile "${conffilearch}" "Downloading Arch pacman.conf" "https://projects.archlinux.org/svntogit/packages.git/plain/pacman/trunk/pacman.conf.x86_64"
-  if [[ $? == 255 ]] ; then
-    echo "Setting Arch mirrorlist file in ${conffilearch}"
-    sed -i "s|/etc/pacman\.d/mirrorlist$|$baseconfpath/mirrorlist.archlinux|" "${conffilearch}"
-  fi
-
-  setmirror() {
-    local distro="$1"
-    local mirror="$2"
-    local mirrorlist="$3"
-    [[ $init ]] && [[ $mirror ]] && {
-      mirrorescaped="${mirror//./\\.}" ; mirrorescaped="${mirrorescaped//\$/\\$}"
-        echo "Setting ${mirror} as the only enabled ${distro} mirror." && \
-          sed -i 's|^#\(Server = '"${mirrorescaped}"'\)$|\1|' "${mirrorlist}"
-    }
-  }
-
-  downloadfile "${mirrorlist}" "Downloading Parabola mirrorlist" "https://repo.parabolagnulinux.org/mirrorlist.txt"
-  if [[ $? == 255 ]] ; then
-    sed -i 's|^Server|#Server|' "${mirrorlist}"
-    setmirror "Parabola" "$mirror" "$mirrorlist"
-  fi
-
-  downloadfile "${mirrorlistarch}" "Downloading Arch mirrorlist" "https://projects.archlinux.org/svntogit/packages.git/plain/pacman-mirrorlist/trunk/mirrorlist"
-  if [[ $? == 255 ]] ; then
-    setmirror "Arch" "$mirrorarch" "$mirrorlistarch"
-  fi
-
-  echo -e "\nSynchronizing $name pacman databases for Parabola"
-  pacman --config "${conffile}" -b "${dbpath}" -Sy || error "Failed to synchronize pacman database for Parabola. Exiting."
-
-  echo -e "\nSynchronizing $name pacman databases for Arch"
-  pacman --config "${conffilearch}" -b "${dbpatharch}" -Sy || error "Failed to synchronize pacman database for Arch. Exiting."
-
-  echo
-  echo "$name pacman databases are updated. $name is ready. Run libredbdiff -n to print results."
-  exit 0
-else
-  filenotfound() {
-	  [[ ! -r $1 ]] && { error "Could not read $1. Nothing done.\nIt may be necessary to run libredbdiff without arguments as root to initialize ${name}." ; }
-  }
-  filenotfound "${dbpath}"
-  filenotfound "${dbpatharch}"
-  filenotfound "${conffile}"
-  filenotfound "${conffilearch}"
-  filenotfound "${mirrorlist}"
-  filenotfound "${mirrorlistarch}"
-fi
-
-unset provides ver verarch
-declare -Ax provides ver verarch
+createdir() {
+	local dir=$1
+	if [[ ! -e $dir ]] ; then
+		msg "Creating directory %q" "$dir"
+		mkdir -- "$1" || die "Failed to create directory %q. Exiting." "$dir"
+	elif [[ $init ]]; then
+		warning "%q already exists. Skipping." "$dir"
+	fi
+}
+
+setmirror() {
+	local distro="$1"
+	local mirror="$2"
+	local mirrorlist="$3"
+	if [[ $init ]] && [[ $mirror ]]; then
+		mirrorescaped="${mirror//./\\.}"
+		mirrorescaped="${mirrorescaped//\$/\\$}"
+		msg "Setting %q as the only enabled %s mirror." "${mirror}" "${distro}"
+		sed -i 's|^#\(Server = '"${mirrorescaped}"'\)$|\1|' "${mirrorlist}"
+	fi
+}
+
+filenotfound() {
+	local file=$1
+	if [[ ! -r $1 ]]; then
+		die "Could not read %q. Nothing done." "$file"
+		plain "It may be necessary to run %q without arguments as root to initialize %s." "$cmd" "$name"
+	fi
+}
 
 comparepkgs() {
-  if [[ ${verarch["$pkgname"]} ]] ; then
-    cmp=$(vercmp ${ver["$pkgname"]} ${verarch["$pkgname"]})
-    [[ $cmp -lt 0 ]] && echo "${pkgname} needs update from the Arch package of the same name. Versions: ${ver["$pkgname"]} - ${verarch["$pkgname"]}"
-  elif [[ ${provides["$pkgname"]} ]] ; then
-    for provide in ${provides["$pkgname"]} ; do
-      [[ ${verarch["$provide"]} ]] && {
-        cmp=$(vercmp "${ver["$pkgname"]}" "${verarch["$provide"]}")
-        [[ $cmp -lt 0 ]] && echo "${pkgname} may need update from provide candidate ${provide}. Versions: ${ver["$pkgname"]} - ${verarch["$provide"]}"
-      }
-    done
-  else
-	  echo "Could not find candidate to compare ${pkgname}"
-  fi
+	if [[ ${verarch[$pkgname]} ]] ; then
+		cmp=$(vercmp "${ver[$pkgname]}" "${verarch[$pkgname]}")
+		if [[ $cmp -lt 0 ]]; then
+			msg "%s needs update from the Arch package of the same name. Versions: %s - %s" "${pkgname}" "${ver[$pkgname]}" "${verarch[$pkgname]}"
+		fi
+	elif [[ ${provides[$pkgname]} ]]; then
+		for provide in "${provides[$pkgname]}"; do
+			if [[ ${verarch["$provide"]} ]]; then
+				cmp=$(vercmp "${ver[$pkgname]}" "${verarch[$provide]}")
+				if [[ $cmp -lt 0 ]]; then
+					msg "%s may need update from provide candidate %s. Versions: %s - %s" "${pkgname}" "${provide}" "${ver[$pkgname]}" "${verarch[$provide]}"
+				fi
+			fi
+		done
+	else
+		msg "Could not find candidate to compare %s" "${pkgname}"
+	fi
+}
+
+usage() {
+	print "Usage: %q [-n|-h]" "$cmd"
+	print 'Show [libre] packages that need to be updated from Arch repositories.'
+	echo
+	prose "The default mode of operation is to download/update all nescessary
+	       files for comparison, but not compare them.  Specify the \`-n\`
+	       flag to not download anything, but to compare already downloaded
+	       files."
+	echo
+	print 'Options:'
+	flag '-n' "Don't update anything, just compare already downloaded files."
+	flag '-h' 'Show this message'
 }
 
-while read -a line ; do
-  verarch["${line[0]}"]="${line[1]}"
-done < <(pacman --dbpath "${dbpatharch}" --config "${conffilearch}" -Ss | grep -v '^ ' | awk -F/ '{print $2}')
+main() {
+	local UPDATE=1
+	local arg
+	for arg in "$@"; do
+		case "$arg" in
+			-n) UPDATE=0;;
+			-h) usage; return 0;;
+			*)
+				error "Bad arguments. Nothing done."
+				usage >&2
+				return 1
+				;;
+		esac
+	done
+
+	if (( $UPDATE )) ; then
+		if [[ $EUID != 0 ]]; then
+			die "To initialize $name or update %s pacman databases, the script must be run as root. Nothing done." "$name"
+		fi
+
+		if ! [[ -d "$baseconfpath" && -d "$basedbpath" && -d "$dbpath" && -d "$dbpatharch" && -e "${conffile}" && -e "${conffilearch}" && -e "${mirrorlist}" && -e  "${mirrorlist}" ]]; then
+			msg "%s files are missing. Initializing." "${name}"
+			init=1
+		fi
+
+		createdir "$baseconfpath"
+		createdir "$basedbpath"
+		createdir "$dbpath"
+		createdir "$dbpatharch"
+
+		downloadfile "${conffile}" "https://projects.parabolagnulinux.org/abslibre.git/plain/libre/pacman/pacman.conf.x86_64" \
+			"Downloading Parabola %q" pacman.conf
+
+		downloadfile "${conffilearch}" "https://projects.archlinux.org/svntogit/packages.git/plain/pacman/trunk/pacman.conf.x86_64" \
+			"Downloading Arch %q" pacman.conf
+		if [[ $? == 255 ]] ; then
+			msg "Setting Arch mirrorlist file in %q" "${conffilearch}"
+			sed -i "s|/etc/pacman\.d/mirrorlist$|$baseconfpath/mirrorlist.archlinux|" "${conffilearch}"
+		fi
+
+		downloadfile "${mirrorlist}" "https://repo.parabolagnulinux.org/mirrorlist.txt" \
+			"Downloading Parabola %q" mirrorlist
+		if [[ $? == 255 ]] ; then
+			sed -i 's|^Server|#Server|' "${mirrorlist}"
+			setmirror "Parabola" "$mirror" "$mirrorlist"
+		fi
+
+		downloadfile "${mirrorlistarch}" "https://projects.archlinux.org/svntogit/packages.git/plain/pacman-mirrorlist/trunk/mirrorlist" \
+			"Downloading Arch %q" mirrorlist
+		if [[ $? == 255 ]] ; then
+			setmirror "Arch" "$mirrorarch" "$mirrorlistarch"
+		fi
+
+		msg "Synchronizing %s pacman databases for Parabola" "$name"
+		pacman --config "${conffile}" -b "${dbpath}" -Sy || die "Failed to synchronize pacman database for Parabola. Exiting."
+
+		msg "Synchronizing %s pacman databases for Arch" "$name"
+		pacman --config "${conffilearch}" -b "${dbpatharch}" -Sy || die "Failed to synchronize pacman database for Arch. Exiting."
+
+		msg "%s pacman databases are updated. %s is ready. Run %q -n to print results." "$name" "$name" "$cmd"
+		return 0
+	else
+		filenotfound "${dbpath}"
+		filenotfound "${dbpatharch}"
+		filenotfound "${conffile}"
+		filenotfound "${conffilearch}"
+		filenotfound "${mirrorlist}"
+		filenotfound "${mirrorlistarch}"
+	fi
+
+	unset provides ver verarch
+	declare -gA provides ver verarch
+
+	while read -a line; do
+		verarch["${line[0]}"]="${line[1]}"
+	done < <(pacman --dbpath "${dbpatharch}" --config "${conffilearch}" -Ss | grep -v '^ ' | awk -F/ '{print $2}')
+
+	while read -a line; do
+		ver[${line[0]}]="${line[1]}"
+		provides[${line[0]}]="${line[@]:2}"
+		pkgname=${line[0]}
+		comparepkgs
+	done < <(expac -b "${dbpath}" -c "${conffile}" -Ss '%r/%n %v %S' | awk -F/ '$1 == "libre" {print $2}')
+}
 
-expac -b "${dbpath}" -c "${conffile}" -Ss '%r/%n %v %S' | awk -F/ '$1 == "libre" {print $2}' | while read -a line ; do
-  ver["${line[0]}"]="${line[1]}"
-  provides[${line[0]}]="${line[@]:2}"
-  pkgname=${line[0]}
-  comparepkgs
-done
+main "$@"
-- 
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