From ddae41d77f23793a95b5c24117940482b7508df8 Mon Sep 17 00:00:00 2001
From: Esteban Carnevale <alfplayer@mailoo.org>
Date: Tue, 16 Dec 2014 14:06:18 -0300
Subject: libredbdiff-standalone: Improve command argument parsing including
 possibility to specify a single Parabola repo, and change function name
 comparepkgs to compare_pkgs

---
 libredbdiff-standalone | 55 ++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 40 insertions(+), 15 deletions(-)

diff --git a/libredbdiff-standalone b/libredbdiff-standalone
index eee0a65..ba3300a 100755
--- a/libredbdiff-standalone
+++ b/libredbdiff-standalone
@@ -24,17 +24,33 @@ mirrorarch='http://mirrors.kernel.org/archlinux/$repo/os/$arch'
 
 repos="libre pcr libre-multilib nonprism"
 
-
 error() { echo -e "Error. $@" > /dev/stderr ; exit 1; }
 
-if [[ $# == 1 ]] ; then
-  [[ $1 == -n ]] && UPDATE=0
-  [[ $1 =~ ^(-h|--help)$ ]] && { echo -e "${progname}. 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 [[ $# != 0 ]] ; then
-  error "Bad arguments. Nothing done."
-else
-  UPDATE=1
-fi
+help() {
+	echo -e "${progname}. 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 for all Parabola repos\nlibredbdiff -n (Parabola repository)\t\tPrint results for the specified Parabola repository"
+}
+
+while true ; do
+	if [[ $1 =~ ^(-n|--noupdate)$ ]] ; then
+		UPDATE=0
+		shift
+	elif [[ $# == 1 && $1 =~ ^(-h|--help)$ ]] ; then
+		help
+		exit
+	else
+		if [[ ! $UPDATE ]] ; then
+			UPDATE=1
+		fi
+		repo_arg="$1"
+		if [[ $2 ]] ; then
+			help
+			error "Bad arguments. Nothing done."
+		else
+			break
+		fi
+	fi
+done
+
 
 enable_repo() {
     repo="$1"
@@ -43,7 +59,7 @@ enable_repo() {
     sed -i "\/\[$repo\]/,+1 s/#Include/Include/" "${conffile}"
 }
 
-if (( $UPDATE )) ; then
+if [[ $UPDATE == 1 ]] ; then
   [[ $EUID != 0 ]] && { error "To initialize $progname or update $progname 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 "${progname} files are missing. Initializing." ; init=1 ; }
@@ -153,7 +169,7 @@ if ! pkgname="$(pacman -Qoq expac)" ; then
   fi
 }
 
-comparepkgs() {
+compare_pkgs() {
   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"]}"
@@ -177,12 +193,21 @@ done < <(pacman --dbpath "${dbpatharch}" --config "${conffilearch}" -Ss | grep -
 
 expac --config "${conffile}" -S '%r/%n %v %S' > /tmp/${progname}.parabola-packages
 
-for repo in ${repos} ; do
-  echo "[$repo]"
+print_cmp() {
+  repo="$1"
   awk -F/ -v repo="$repo" '$1 == repo {print $2}' /tmp/${progname}.parabola-packages | while read -a line ; do
     ver["${line[0]}"]="${line[1]}"
     provides[${line[0]}]="${line[@]:2}"
     pkgname=${line[0]}
-    comparepkgs
+    compare_pkgs
   done
-done
+}
+
+if [[ ${repo_arg} ]] ; then
+  print_cmp "${repo_arg}"
+else
+  for repo in ${repos} ; do
+    echo "[$repo]"
+    print_cmp "$repo"
+  done
+fi
-- 
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