Merge pull request #7 from piotr-iohk/number_of_lines_in_tail

Number of lines in tail
piotr-iohk · Mar 1, 2023 · 3064079 · 3064079
2 parents 2ccf4c6 + 89670b3
commit 3064079
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Showing 3 changed files with 10 additions and 7 deletions.
diff --git a/bin/cardano-up b/bin/cardano-up
@@ -14,7 +14,7 @@ doc = <<~DOCOPT
     #{File.basename(__FILE__)} ls
     #{File.basename(__FILE__)} config [--set-default] [--bindir <path>] [--configdir <path>] [--logdir <path>] [--statedir <path>]
     #{File.basename(__FILE__)} <env> [(node|wallet)] [(up|down|ping)] [--port <port>] [--session <name>]
-    #{File.basename(__FILE__)} <env> (node|wallet) tail [--session <name>]
+    #{File.basename(__FILE__)} <env> (node|wallet) tail [--lines <num_lines>] [--session <name>]
     #{File.basename(__FILE__)} -v | --version
     #{File.basename(__FILE__)} -e | --examples
     #{File.basename(__FILE__)} -h | --help
@@ -29,6 +29,7 @@ doc = <<~DOCOPT
                             ones from latest release.
     down                    Stop particular service.
     tail                    Follow logs for particular service.
+    -n --lines <num_lines>  Number of lines to show from the end of the log file. [default: 10]
     ping                    Ping service to check its status.
     ls                      List sessions.
     -p --port <port>        Specify wallet port. [default: 8090]
@@ -122,7 +123,7 @@ Check health of node and wallet on mainnet:
 Monitor mainnet wallet and node logs (Ctrl + c to stop):
 
     $ #{File.basename(__FILE__)} mainnet node tail
-    $ #{File.basename(__FILE__)} mainnet wallet tail
+    $ #{File.basename(__FILE__)} mainnet wallet tail -n 100
 
 Stop preprod node:
 
@@ -316,14 +317,15 @@ Stop mainnet node and wallet:
   elsif o['tail'] == true
     env = o['<env>']
     session_name = o['--session']
+    lines = o['--lines'].to_i
     begin
       log_dir = File.join(CardanoUp.config[:log_dir], session_name, env)
       if o['node']
         log_file = File.join(log_dir, 'node.log')
-        CardanoUp::Tail.tail(log_file)
+        CardanoUp::Tail.tail(log_file, lines)
       elsif o['wallet']
         log_file = File.join(log_dir, 'wallet.log')
-        CardanoUp::Tail.tail(log_file)
+        CardanoUp::Tail.tail(log_file, lines)
       end
     rescue CardanoUp::EnvNotSupportedError => e
       warn(e.message)

diff --git a/lib/cardano-up/tail.rb b/lib/cardano-up/tail.rb
@@ -3,11 +3,12 @@
 module CardanoUp
   # Tail log file
   module Tail
-    def self.tail(file_path)
+    def self.tail(file_path, lines = nil)
+      lines_back = lines || 10
       File.open(file_path) do |log|
         log.extend(File::Tail)
         log.interval
-        log.backward(10)
+        log.backward(lines_back.to_i)
         log.tail { |line| warn line }
       end
     end

diff --git a/lib/cardano-up/version.rb b/lib/cardano-up/version.rb
@@ -2,5 +2,5 @@
 
 # Version
 module CardanoUp
-  VERSION ||= '0.1.3'
+  VERSION ||= '0.1.4'
 end