Add --all cli flag that enables all available rules

Makefile

@@ -16,4 +16,4 @@ bin: build
 	cp ./bin/ameba $(SHARD_BIN)
 test: build
 	$(CRYSTAL_BIN) spec
-	./bin/ameba
+	./bin/ameba --all

spec/ameba/cli/cmd_spec.cr

@@ -42,6 +42,16 @@ module Ameba::Cli
         c.except.should eq %w(RULE1 RULE2)
       end
 
+      it "defaults all? flag to false" do
+        c = Cli.parse_args %w(file.cr)
+        c.all?.should eq false
+      end
+
+      it "accepts --all flag" do
+        c = Cli.parse_args %w(--all)
+        c.all?.should eq true
+      end
+
       it "accepts --gen-config flag" do
         c = Cli.parse_args %w(--gen-config)
         c.formatter.should eq :todo

spec/ameba/rule/layout/line_length_spec.cr

@@ -2,20 +2,20 @@ require "../../../spec_helper"
 
 module Ameba::Rule::Layout
   subject = LineLength.new
-  long_line = "*" * 81
+  long_line = "*" * (subject.max_length + 1)
 
   describe LineLength do
-    it "passes if all lines are shorter than 80 symbols" do
+    it "passes if all lines are shorter than MaxLength symbols" do
       source = Source.new "short line"
       subject.catch(source).should be_valid
     end
 
-    it "passes if line consists of 79 symbols" do
-      source = Source.new "*" * 80
+    it "passes if line consists of MaxLength symbols" do
+      source = Source.new "*" * subject.max_length
       subject.catch(source).should be_valid
     end
 
-    it "fails if there is at least one line longer than 79 symbols" do
+    it "fails if there is at least one line longer than MaxLength symbols" do
       source = Source.new long_line
       subject.catch(source).should_not be_valid
     end
@@ -26,7 +26,7 @@ module Ameba::Rule::Layout
 
       issue = source.issues.first
       issue.rule.should eq subject
-      issue.location.to_s.should eq "source.cr:1:81"
+      issue.location.to_s.should eq "source.cr:1:#{subject.max_length + 1}"
       issue.message.should eq "Line too long"
     end
 

src/ameba/cli/cmd.cr

@@ -25,6 +25,7 @@ module Ameba::Cli
     property files : Array(String)?
     property only : Array(String)?
     property except : Array(String)?
+    property? all = false
   end
 
   def parse_args(args, opts = Opts.new)
@@ -56,6 +57,10 @@ module Ameba::Cli
         opts.except = rules.split ","
       end
 
+      parser.on("--all", "Enables all available rules") do
+        opts.all = true
+      end
+
       parser.on("--gen-config",
         "Generate a configuration file acting as a TODO list") do
         opts.formatter = :todo
@@ -70,6 +75,8 @@ module Ameba::Cli
     if only = opts.only
       config.rules.map! { |r| r.enabled = false; r }
       config.update_rules(only, enabled: true)
+    elsif opts.all?
+      config.rules.map! { |r| r.enabled = true; r }
     end
 
     config.update_rules(opts.except, enabled: false)

src/ameba/rule/layout/line_length.cr

@@ -13,7 +13,7 @@ module Ameba::Rule::Layout
     properties do
       enabled false
       description "Disallows lines longer than `MaxLength` number of symbols"
-      max_length 80
+      max_length 140
     end
 
     MSG = "Line too long"