Feat(mine): auto generate passphrase (Fixes #14)

bin/mine

@@ -54,9 +54,22 @@ echo ">started at: $DATE"                  > $LOG
 echo ">build flags: $MKP224O_BUILD_FLAGS" >> $LOG
 cat $FILTERS | xargs echo ">filters:"     >> $LOG
 
-# Check for PASSPHRASE_COMMAND
-if [ ! -z "$PASSPHRASE_COMMAND" ]; then
-  PASSPHRASE="`$PASSPHRASE_COMMAND`"
+# Check for passphrase handling
+if [ -z "$PASSPHRASE" ]; then
+  if [ ! -z "$PASSPHRASE_AUTOGEN" ] && [ "$PASSPHRASE_AUTOGEN" == "1" ]; then
+    if [ -s "$POOL/passphrase" ]; then
+      PASSPHRASE="`cat $POOL/passphrase`"
+    else
+      PASSPHRASE="`head -c 20 /dev/urandom | base64`"
+
+      echo "$PASSPHRASE" > $POOL/passphrase
+    fi
+  elif [ ! -z "$PASSPHRASE_COMMAND" ]; then
+    PASSPHRASE="`$PASSPHRASE_COMMAND`"
+  fi
+
+  # Export the passphrase
+  export PASSPHRASE
 fi
 
 # Run

onionmine.conf.sample

@@ -85,6 +85,9 @@ MKP224O_RUN_FLAGS="-s -d $CANDIDATES -f $FILTERS -B"
 # Store the passphrase in a variable (not recommended)
 #PASSPHRASE=""
 
+# Set to 1 to autogenerate a passphrase for each pool
+#PASSPHRASE_AUTOGEN="0"
+
 # Fetch the passphrase an external command
 #
 # Any external command can be used as long as it returns a passphrase in the