From e978ff49970a186e11f791b31b7daa58d2673023 Mon Sep 17 00:00:00 2001
From: Andreas Schildbach <andreas@schildbach.de>
Date: Fri, 7 Aug 2015 17:20:22 +0200
Subject: [PATCH] Add help text to BuildCheckpoints.

---
 .../src/main/java/org/bitcoinj/tools/BuildCheckpoints.java | 7 +++++++
 tools/src/main/java/org/bitcoinj/tools/WalletTool.java     | 4 +---
 .../org/bitcoinj/tools/build-checkpoints-help.txt          | 7 +++++++
 3 files changed, 15 insertions(+), 3 deletions(-)
 create mode 100644 tools/src/main/resources/org/bitcoinj/tools/build-checkpoints-help.txt

diff --git a/tools/src/main/java/org/bitcoinj/tools/BuildCheckpoints.java b/tools/src/main/java/org/bitcoinj/tools/BuildCheckpoints.java
index c971957a..01f142eb 100644
--- a/tools/src/main/java/org/bitcoinj/tools/BuildCheckpoints.java
+++ b/tools/src/main/java/org/bitcoinj/tools/BuildCheckpoints.java
@@ -26,6 +26,7 @@ import org.bitcoinj.store.MemoryBlockStore;
 import org.bitcoinj.utils.BriefLogFormatter;
 import org.bitcoinj.utils.Threading;
 import com.google.common.base.Charsets;
+import com.google.common.io.Resources;
 import joptsimple.OptionParser;
 import joptsimple.OptionSet;
 import joptsimple.OptionSpec;
@@ -55,10 +56,16 @@ public class BuildCheckpoints {
 
     public static void main(String[] args) throws Exception {
         OptionParser parser = new OptionParser();
+        parser.accepts("help");
         OptionSpec<NetworkEnum> netFlag = parser.accepts("net").withRequiredArg().ofType(NetworkEnum.class).defaultsTo(NetworkEnum.MAIN);
         OptionSpec<Integer> daysFlag = parser.accepts("days").withRequiredArg().ofType(Integer.class).defaultsTo(30);
         OptionSet options = parser.parse(args);
 
+        if (options.has("help")) {
+            System.out.println(Resources.toString(BuildCheckpoints.class.getResource("build-checkpoints-help.txt"), Charsets.UTF_8));
+            return;
+        }
+
         String suffix;
         switch (netFlag.value(options)) {
             case MAIN:
diff --git a/tools/src/main/java/org/bitcoinj/tools/WalletTool.java b/tools/src/main/java/org/bitcoinj/tools/WalletTool.java
index c6e90a18..84c01b9c 100644
--- a/tools/src/main/java/org/bitcoinj/tools/WalletTool.java
+++ b/tools/src/main/java/org/bitcoinj/tools/WalletTool.java
@@ -226,11 +226,9 @@ public class WalletTool {
         parser.accepts("dump-privkeys");
         options = parser.parse(args);
 
-        final String HELP_TEXT = Resources.toString(WalletTool.class.getResource("wallet-tool-help.txt"), Charsets.UTF_8);
-
         if (args.length == 0 || options.has("help") ||
                 options.nonOptionArguments().size() < 1 || options.nonOptionArguments().contains("help")) {
-            System.out.println(HELP_TEXT);
+            System.out.println(Resources.toString(WalletTool.class.getResource("wallet-tool-help.txt"), Charsets.UTF_8));
             return;
         }
 
diff --git a/tools/src/main/resources/org/bitcoinj/tools/build-checkpoints-help.txt b/tools/src/main/resources/org/bitcoinj/tools/build-checkpoints-help.txt
new file mode 100644
index 00000000..d5fa2d5d
--- /dev/null
+++ b/tools/src/main/resources/org/bitcoinj/tools/build-checkpoints-help.txt
@@ -0,0 +1,7 @@
+BuildCheckpoints: create checkpoint files to use with CheckpointManager
+
+Usage: build-checkpoints --flags
+
+>>> OPTIONS
+  --net=XXX            Which network to connect to, defaults to MAIN, can also be TEST or REGTEST.
+  --days=<int>         How many days to keep as a safety margin. Checkpointing will be done up to this many days ago.
\ No newline at end of file