X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/0c1326826fd23ce859db8e923c37b7199c6da2c8..cce08fb5aca7dd01706cecea845b183dc62b1717:/debian/apt.cron.daily

diff --git a/debian/apt.cron.daily b/debian/apt.cron.daily
index 67b58747e..26dfa2530 100644
--- a/debian/apt.cron.daily
+++ b/debian/apt.cron.daily
@@ -1,54 +1,186 @@
 #!/bin/sh
 #
-# cron job for apt-get update
+
+#set -e
+#
+# This file understands the following apt configuration variables:
 #
-# Update-Package-Intervall is in days
+#  "APT::Periodic::Update-Package-Lists=1"
+#  - Do "apt-get update" automatically every n-days (0=disable)
+#    
+#  "APT::Periodic::Download-Upgradeable-Packages=0",
+#  - Do "apt-get upgrade --download-only" every n-days (0=disable)
+# 
+#  "APT::Periodic::AutocleanInterval"
+#  - Do "apt-get autoclean" every n-days (0=disable)
 #
-STAMP=/var/lib/apt/update-stamp
+#  "APT::Archives::MaxAge",
+#  - Set maximum allowed age of a cache package file. If a cache 
+#    package file is older it is deleted (0=disable)
+#
+#  "APT::Archives::MaxSize",
+#  - Set maximum size of the cache in MB (0=disable). If the cache
+#    is bigger, cached package files are deleted until the size
+#    requirement is met (the biggest packages will be deleted 
+#    first).
+#
+#  "APT::Archives::MinAge"
+#  - Set minimum age of a package file. If a file is younger it
+#    will not be deleted (0=disable). Usefull to prevent races 
+#    and to keep backups of the packages for emergency.
+# 
 
-#set -e
+check_stamp()
+{
+    stamp="$1"
+    interval="$2"
+
+    if [ $interval -eq 0 ]; then
+        return 1
+    fi
+
+    if [ ! -f $stamp ]; then
+        return 0
+    fi
 
-do_update()
+    # compare midnight today to midnight the day the stamp was updated
+    stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
+    now=$(date --date=$(date --iso-8601) +%s)
+    delta=$(($now-$stamp))
+
+    # intervall is in days,
+    interval=$(($interval*60*60*24))
+    #echo "stampfile: $1"
+    #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta"
+
+    if [ $delta -ge $interval ]; then
+        return 0
+    fi
+
+    return 1
+}
+
+update_stamp()
 {
-    touch $STAMP.new
-    if apt-get update -qq; then
-	if [ -x /usr/bin/dbus-send ]; then
-	    dbus-send --system / app.apt.dbus.updated boolean:true
-	fi
-        mv $STAMP.new $STAMP
+    stamp="$1"
+
+    touch $stamp
+}
+
+
+
+# we check here if autoclean was enough sizewise
+check_size_constraints()
+{
+    # min-age in days
+    MaxAge=0
+    MinAge=2
+    MaxSize=0
+    CacheDir="var/cache/apt"
+    CacheArchive="archives/"
+    eval $(apt-config shell MaxAge APT::Archives::MaxAge)
+    eval $(apt-config shell MinAge APT::Archives::MinAge)
+    eval $(apt-config shell MaxSize APT::Archives::MaxSize)
+    eval $(apt-config shell Dir Dir)
+    eval $(apt-config shell CacheDir Dir::Cache)
+    eval $(apt-config shell CacheArchive Dir::Cache::archives)
+
+    # sanity check
+    if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
+	echo "empty Dir::Cache or Dir::Cache::archives, exiting"
+	exit
+    fi
+    
+    Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
+
+    # check age
+    if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
+	find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
+    elif [ ! $MaxAge -eq 0 ]; then
+	find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
+    fi
+    
+    # check size
+    if [ ! $MaxSize -eq 0 ]; then
+	# maxSize is in MB
+	MaxSize=$(($MaxSize*1024))
+
+	#get current time
+	now=$(date --date=$(date --iso-8601) +%s)
+	MinAge=$(($MinAge*24*60*60))
+
+	# reverse-sort by mtime
+	for file in $(ls -rt $Cache/*.deb 2>/dev/null); do 
+	    du=$(du -s $Cache)
+	    size=${du%%/*}
+	    # check if the cache is small enough
+	    if [ $size -lt $MaxSize ]; then
+		break
+	    fi
+
+	    # check for MinAge of the file
+	    if [ ! $MinAge -eq 0 ]; then 
+		# check both ctime and mtime 
+		mtime=$(stat -c %Y $file)
+		ctime=$(stat -c %Z $file)
+		if [ $mtime -gt $ctime ]; then
+		    delta=$(($now-$mtime))
+		else
+		    delta=$(($now-$ctime))
+		fi
+		#echo "$file ($delta), $MinAge"
+		if [ $delta -le $MinAge ]; then
+		    #echo "Skiping $file (delta=$delta)"
+		    break
+		fi
+	    fi
+
+	    # delete oldest file
+	    rm -f $file
+	done
     fi
-    rm -f $STAMP.new
 }
 
-UpdateInterval=0
-RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
-eval $RES
 
-if [ $UpdateInterval -eq 0 ]; then
-    exit 0
-fi
+UpdateInterval=0
+DownloadUpgradeableInterval=0
+eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
+AutocleanInterval=$DownloadUpgradeableInterval
+eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)
 
 # laptop check, on_ac_power returns:
 #       0 (true)    System is on mains power
 #       1 (false)   System is not on mains power
 #       255 (false) Power status could not be determined
 # Desktop systems always return 255 it seems
-if [ -x /usr/bin/on_ac_power ]; then
-    /usr/bin/on_ac_power 
+if which on_ac_power >/dev/null; then
+    on_ac_power
     if [ $? -eq 1 ]; then
 	exit 0
     fi
 fi
 
-if [ ! -f $STAMP ]; then
-    do_update
-    exit 0
+UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
+if check_stamp $UPDATE_STAMP $UpdateInterval; then
+    if apt-get -qq update 2>/dev/null; then
+	if which dbus-send >/dev/null; then
+	    dbus-send --system / app.apt.dbus.updated boolean:true
+	fi
+        update_stamp $UPDATE_STAMP
+    fi
 fi
 
-LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null` 
-Now=`date +%s`
+DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
+if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
+    apt-get -qq -d dist-upgrade 2>/dev/null
+    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
+fi
 
-NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
-if [ $NeedUpdate -le $Now ]; then
-    do_update
+AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
+if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
+    apt-get -qq autoclean
+    update_stamp $AUTOCLEAN_STAMP
 fi
+
+# check cache size 
+check_size_constraints