[parquet-mr] branch master updated: PARQUET-1593: Improve parquet-cli's example usage (#646)

[fokko]

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in repository https://gitbox.apache.org/repos/asf/parquet-mr.git


The following commit(s) were added to refs/heads/master by this push:
     new 616e35f  PARQUET-1593: Improve parquet-cli's example usage (#646)
616e35f is described below

commit 616e35f9e164a24104da148f713b2e8258a4f54f
Author: Kengo Seki <sek...@apache.org>
AuthorDate: Fri Jan 10 21:52:50 2020 +0900

    PARQUET-1593: Improve parquet-cli's example usage (#646)
    
    The following description is a bit weird since there's no command
    called "create" actually. This PR replaces the subcommand with an
    actually existent one.
    
    ```
      Examples:
    
        # print information for create
        parquet help create
    ```
---
 parquet-cli/src/main/java/org/apache/parquet/cli/Help.java | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/parquet-cli/src/main/java/org/apache/parquet/cli/Help.java 
b/parquet-cli/src/main/java/org/apache/parquet/cli/Help.java
index 791d169..c41c881 100644
--- a/parquet-cli/src/main/java/org/apache/parquet/cli/Help.java
+++ b/parquet-cli/src/main/java/org/apache/parquet/cli/Help.java
@@ -111,11 +111,14 @@ public class Help implements Command {
       console.info("    {}\n\t{}",
           command, jc.getCommandDescription(command));
     }
-    console.info("\n  Examples:");
-    console.info("\n    # print information for create\n    {} help create",
-        programName);
-    console.info("\n  See '{} help <command>' for more information on a " +
+
+    jc.getCommands().keySet().stream().filter(s -> 
!s.equals("help")).findFirst().ifPresent(command -> {
+      console.info("\n  Examples:");
+      console.info("\n    # print information for {}\n    {} help {}",
+        command, programName, command);
+      console.info("\n  See '{} help <command>' for more information on a " +
         "specific command.", programName);
+    });
   }
 
   private boolean printOption(Logger console, ParameterDescription param) {