Fix logging

TODO.md

@@ -22,8 +22,8 @@
 * Make more things configurable / remove hardcoded stuff
 * CD for binaries and images for at least arm64/x86
 * Multi-container docker logs [faaso logs -f FUNKO]
-* Direct error and above to stderr, others to stdout, while
-  keeping logging level configurable
+* ✅ Direct error and above to stderr, others to stdout,
+  while keeping logging level configurable
 * ✅ Fix proxy reload / Make it reload on file changes
 
 # Things to do but not before release

src/commands/scale.cr

@@ -13,15 +13,15 @@ module Faaso
       def local(options, name, scale) : Int32
         funko = Funko::Funko.from_names([name])[0]
         # Asked about scale
+        if funko.image_history.empty?
+          Log.error { "Unknown funko #{funko.name}" }
+          return 1
+        end
         if !scale
           Log.info { "Funko #{name} has a scale of #{funko.scale}" }
           return 0
         end
         # Asked to set scale
-        if funko.image_history.empty?
-          Log.error { "Error: no images available for #{funko.name}:latest" }
-          return 1
-        end
         funko.scale(scale.as(String).to_i)
         0
       end

src/log.cr

@@ -0,0 +1,50 @@
+module Logging
+  extend self
+
+  class LogBackend < Log::IOBackend
+    @stdout = Log::IOBackend.new(io: STDOUT, formatter: LogFormat)
+    @stderr = Log::IOBackend.new(io: STDERR, formatter: LogFormat)
+
+    def write(entry : Log::Entry)
+      if entry.severity >= Log::Severity::Error
+        @stderr.write entry
+      else
+        @stdout.write entry
+      end
+    end
+  end
+
+  struct LogFormat < Log::StaticFormatter
+    @@colors = {
+      "FATAL"  => :red,
+      "ERROR"  => :red,
+      "WARN"   => :yellow,
+      "NOTICE" => :yellow,
+      "INFO"   => :green,
+      "DEBUG"  => :blue,
+      "TRACE"  => :light_blue,
+    }
+
+    def run
+      string "#{@entry.message}".colorize(@@colors[@entry.severity.label])
+    end
+  end
+
+  def self.setup(verbosity)
+    Colorize.on_tty_only!
+    verbosity = [0, verbosity].max
+    verbosity = [6, verbosity].min
+    severity = [
+      Log::Severity::Fatal,
+      Log::Severity::Error,
+      Log::Severity::Warn,
+      Log::Severity::Notice,
+      Log::Severity::Info,
+      Log::Severity::Debug,
+      Log::Severity::Trace,
+    ][verbosity]
+    Log.setup(
+      severity,
+      LogBackend.new)
+  end
+end

src/main.cr

@@ -1,4 +1,5 @@
 require "./faaso.cr"
+require "./log.cr"
 require "colorize"
 require "docopt"
 require "rucksack"
@@ -7,45 +8,6 @@ macro version
   "{{ `grep version shard.yml | cut -d: -f2` }}".strip()
 end
 
-struct LogFormat < Log::StaticFormatter
-  @@colors = {
-    "FATAL" => :red,
-    "ERROR" => :red,
-    "WARN"  => :yellow,
-    "INFO"  => :green,
-    "DEBUG" => :blue,
-    "TRACE" => :light_blue,
-  }
-
-  def run
-    string "#{@entry.message}".colorize(@@colors[@entry.severity.label])
-  end
-
-  def self.setup(verbosity)
-    Colorize.on_tty_only!
-    if verbosity < 3
-      _verbosity = [
-        Log::Severity::Fatal,
-        Log::Severity::Error,
-        Log::Severity::Warn,
-      ][[verbosity, 2].min]
-      Log.setup(
-        _verbosity,
-        Log::IOBackend.new(io: STDERR, formatter: LogFormat)
-      )
-    end
-
-    _verbosity = [Log::Severity::Info,
-                  Log::Severity::Debug,
-                  Log::Severity::Trace,
-    ][[verbosity - 3, 3].min]
-    Log.setup(
-      _verbosity,
-      Log::IOBackend.new(io: STDOUT, formatter: LogFormat)
-    )
-  end
-end
-
 doc = <<-DOC
 FaaSO CLI tool.
 
@@ -65,11 +27,11 @@ Options:
   -l --local       Run commands locally instead of against a FaaSO server
   --no-runtime     Don't merge a runtime into the funko
   -r runtime       Runtime for the new funko (use -r list for examples)
-  -v level         Control the logging verbosity, 0 to 5 [default: 3]
+  -v level         Control the logging verbosity, 0 to 6 [default: 4]
 DOC
 
 ans = Docopt.docopt(doc, ARGV)
-LogFormat.setup(ans["-v"].to_s.to_i)
+Logging.setup(ans["-v"].to_s.to_i)
 Log.debug { ans }
 
 status : Int32 = 0