dinstall

put all log created by the varios functions into files named after
their stage lockfile. At the end of the function, redirect log
back to the global LOGFILE, after their stage logfile got appended to
it.

Use the stage logfile in the ERRtrap, so whenever an error happen the
stuff that gets mailed is the short part that happens to be around the
error, not the whole long stuff the complete dinstall log happens to be.
Signed-off-by: NJoerg Jaspert <joerg@debian.org>

config/debian/cron.dinstall

@@ -59,7 +59,7 @@ function cleanup() {
 # If we error out this one is called, *FOLLOWED* by cleanup above
 function onerror() {
     ERRDATE=$(date "+%Y.%m.%d-%H:%M:%S")
-    cat "$LOGFILE" | mail -s "ATTENTION ATTENTION! dinstall error at ${ERRDATE} (Be quiet, Brain, or I'll stab you with a Q-tip)" cron@ftp-master.debian.org
+    cat "${STAGEFILE}.log" | mail -s "ATTENTION ATTENTION! dinstall error at ${ERRDATE} in ${STAGEFILE} - (Be quiet, Brain, or I'll stab you with a Q-tip)" cron@ftp-master.debian.org
 }
 
 ########################################################################
@@ -446,8 +446,9 @@ function stage() {
     ARGS='GO[@]'
     local "${!ARGS}"
 
-    if [ -f "${stagedir}/${FUNC}" ]; then
-        stamptime=$(/usr/bin/stat -c %Z "${stagedir}/${FUNC}")
+    STAGEFILE="${stagedir}/${FUNC}"
+    if [ -f "${STAGEFILE}" ]; then
+        stamptime=$(/usr/bin/stat -c %Z "${STAGEFILE}")
         unixtime=$(date +%s)
         difference=$(( $unixtime - $stamptime ))
         if [ ${difference} -ge 14400 ]; then
@@ -464,6 +465,11 @@ function stage() {
     # it has to cd first!
     cd ${configdir}
 
+    # Now redirect the output into $STAGEFILE.log. In case it errors out somewhere our
+    # errorhandler trap can then mail the contents of $STAGEFILE.log only, instead of a whole
+    # dinstall logfile. Short error mails ftw!
+    exec >> "${STAGEFILE}.log" 2>&1
+
     if [ -f "${LOCK_STOP}" ]; then
         log "${LOCK_STOP} exists, exiting immediately"
         exit 42
@@ -480,12 +486,20 @@ function stage() {
     # Make sure we are always at the same place.
     cd ${configdir}
 
-    touch "${stagedir}/${FUNC}"
+    touch "${STAGEFILE}"
 
     if [ -n "${TIME}" ]; then
         ts "${TIME}"
     fi
 
+    # And the output goes back to the normal logfile
+    exec >> "$LOGFILE" 2>&1
+
+    # Now we should make sure that we have a usable dinstall.log, so append the $STAGEFILE.log
+    # to it.
+    cat "${STAGEFILE}.log" >> "${LOGFILE}"
+    rm -f "${STAGEFILE}.log"
+
     if [ -f "${LOCK_STOP}" ]; then
         log "${LOCK_STOP} exists, exiting immediately"
         exit 42