From: Anders Kaseorg <andersk@mit.edu>
Date: Thu, 21 May 2009 04:16:24 +0000 (-0400)
Subject: Add apt-zephyr hook.
X-Git-Url: https://snippets.scripts.mit.edu/gitweb.cgi/Scripts/git/.git/commitdiff_plain/2f0630d7cb024286ef5d215d1ba2d21e40f1019b

Add apt-zephyr hook.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
---

diff --git a/apt-zephyr/90zephyr b/apt-zephyr/90zephyr
new file mode 100644
index 0000000..f2aa9cb
--- /dev/null
+++ b/apt-zephyr/90zephyr
@@ -0,0 +1,2 @@
+DPkg::Pre-Install-Pkgs {"/usr/local/sbin/apt-zephyr || :";};
+DPkg::Tools::options::/usr/local/sbin/apt-zephyr::Version "2";
diff --git a/apt-zephyr/README b/apt-zephyr/README
new file mode 100644
index 0000000..fc20d47
--- /dev/null
+++ b/apt-zephyr/README
@@ -0,0 +1,17 @@
+apt-zephyr hook
+
+Author: Anders Kaseorg <andersk@mit.edu>
+
+Usage: install these files to
+
+/etc/apt/apt.conf.d/90zephyr
+/usr/local/sbin/apt-zephyr
+
+and configure /etc/apt-zephyr.conf, e.g.
+
+CLASS="linerva"
+INSTANCE="apt.$(hostname)"
+
+Valid options include CLASS, INSTANCE, REALM, RECIPIENTS, SIG (default 
+"$(hostname -f)"), OPCODE (default "auto"), ZAUTH (default "", set 
+nonempty to enable).
diff --git a/apt-zephyr/apt-zephyr b/apt-zephyr/apt-zephyr
new file mode 100755
index 0000000..54300bd
--- /dev/null
+++ b/apt-zephyr/apt-zephyr
@@ -0,0 +1,79 @@
+#!/bin/sh
+set -e
+
+# Defaults
+CLASS=
+INSTANCE=
+REALM=
+RECIPIENTS=
+SIG="$(hostname -f)"
+OPCODE=auto
+ZAUTH=
+
+# Read configuration
+. /etc/apt-zephyr.conf
+
+package ()
+{
+    package=$1
+    oldver=$2
+    cmp=$3
+    newver=$4
+
+    if [ "$newver" = '-' ] && [ "$oldver" = '-' ]; then
+	echo "Purging $package"
+    elif [ "$newver" = '-' ]; then
+	echo "Removing $package $oldver"
+    elif [ "$oldver" = '-' ]; then
+	echo "Installing $package $newver"
+    elif [ "$cmp" = '<' ]; then
+	echo "Upgrading $package $oldver to $newver"
+    elif [ "$cmp" = '=' ]; then
+	echo "Reinstalling $package $newver"
+    elif [ "$cmp" = '>' ]; then
+	echo "Downgrading $package $oldver to $newver"
+    else
+	echo "I'm confused: $*"
+    fi
+}
+
+read -r line
+case "$line" in
+    'VERSION 2')
+	while read -r line && [ -n "$line" ]; do :; done
+	while read -r package oldver cmp newver action; do
+	    case "$action" in
+		'**CONFIGURE**' | '**REMOVE**')
+		    package "$package" "$oldver" "$cmp" "$newver"
+		    ;;
+		'**ERROR**')
+		    echo "ERROR on $package $newver"
+		    ;;
+	    esac
+	done
+	;;
+    'VERSION *')
+	echo "$0: unrecognized version: $line"
+	;;
+    '')
+	;;
+    *)
+	oldpkgs=$(mktemp -t "apt-zephyr-old.XXXXXX") || exit $?
+	newpkgs=$(mktemp -t "apt-zephyr-new.XXXXXX") || exit $?
+	(echo "$line"; cat) | xargs -r -d '\n' dpkg-deb -W | sort -o "$newpkgs"
+	cut -f 1 "$newpkgs" | xargs -r -d '\n' dpkg-query -W | \
+	    sort -o "$oldpkgs"
+	join -t '	' -j 1 -e '-' "$oldpkgs" "$newpkgs" | \
+	    while IFS='	' read -r package oldver newver; do
+	    if dpkg --compare-versions "$oldver" lt "$newver"; then
+		package "$package" "$oldver" '<' "$newver"
+	    elif dpkg --compare-versions "$oldver" eq "$newver"; then
+		package "$package" "$oldver" '=' "$newver"
+	    else
+		package "$package" "$oldver" '>' "$newver"
+	    fi
+	done
+	rm -f "$oldpkgs" "$newpkgs"
+	;;
+esac | \
+    zwrite ${CLASS:+-c "$CLASS"} ${INSTANCE:+-i "$INSTANCE"} ${REALM:+-r "$REALM"} ${SIG:+-s "$SIG"} ${OPCODE:+-O "$OPCODE"} ${ZAUTH:--d} ${RECIPIENTS:+$RECIPIENTS}