fix building of deb and rpm

fpm requires json 1.x but the artifact rake tasks
will activate the default gem json 2

This PR ensures json 1 is activated early and is present right after
jruby is bootstrapped.

Also downgrades fpm to 1.3 as 1.11.0 wasn't building correctly

Downgrades .ruby-version to a version we have available in CI

Fixes elastic#10396

.ruby-version

@@ -1 +1 @@
-jruby-9.2.4.1
+jruby-9.1.12.0

Gemfile.template

@@ -14,7 +14,7 @@ gem "benchmark-ips", :group => :development
 gem "octokit", "~> 4", :group => :build
 gem "stud", "~> 0.0.22", :group => :build
 gem "rack-test", :require => "rack/test", :group => :development
-gem "fpm", "~> 1.11", :group => :build
+gem "fpm", "~> 1.3.3", :group => :build
 gem "rubyzip", "~> 1", :group => :build
 gem "gems", "~> 1", :group => :build
 gem "flores", "~> 0.0.6", :group => :development

build.gradle

@@ -217,6 +217,7 @@ task downloadAndInstallJRuby(dependsOn: [verifyFile, installCustomJRuby], type:
     into "${projectDir}/vendor/jruby"
     doLast {
       rubyGradleUtils.gem("rake", "12.3.1", "${projectDir}/vendor/bundle/jruby/2.5.0")
+      rubyGradleUtils.gem("json", "1.8.6", "${projectDir}/vendor/bundle/jruby/2.5.0")
     }
 }
 
@@ -232,6 +233,7 @@ task installDefaultGems(dependsOn: downloadAndInstallJRuby) {
   outputs.dir("${projectDir}/vendor/bundle/jruby/2.5.0")
   doLast {
     rubyGradleUtils.gem("rake", "12.3.1", "${projectDir}/vendor/bundle/jruby/2.5.0")
+    rubyGradleUtils.gem("json", "1.8.6", "${projectDir}/vendor/bundle/jruby/2.5.0")
     rubyGradleUtils.rake('plugin:install-default')
   }
 }
@@ -250,6 +252,7 @@ task installTestGems(dependsOn: assemblyDeps) {
   outputs.dir("${projectDir}/vendor/bundle/jruby/2.5.0")
   doLast {
     rubyGradleUtils.gem("rake", "12.3.1", "${projectDir}/vendor/bundle/jruby/2.5.0")
+    rubyGradleUtils.gem("json", "1.8.6", "${projectDir}/vendor/bundle/jruby/2.5.0")
     rubyGradleUtils.rake('test:install-core')
   }
 }

logstash-core/logstash-core.gemspec

@@ -49,7 +49,7 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency "pry", "~> 0.12"  #(Ruby license)
   gem.add_runtime_dependency "stud", "~> 0.0.19" #(Apache 2.0 license)
-  gem.add_runtime_dependency "clamp", "~> 1" #(MIT license) for command line args/flags
+  gem.add_runtime_dependency "clamp", "~> 0.6" #(MIT license) for command line args/flags
   gem.add_runtime_dependency "filesize", "~> 0.2" #(MIT license) for :bytes config validator
   gem.add_runtime_dependency "gems", "~> 1"  #(MIT license)
   gem.add_runtime_dependency "concurrent-ruby", "~> 1"

rakelib/artifacts.rake

@@ -1,4 +1,5 @@
 namespace "artifact" do
+  gem 'json', '~> 1'
 
   SNAPSHOT_BUILD = ENV["RELEASE"] != "1"
   VERSION_QUALIFIER = ENV["VERSION_QUALIFIER"]

rakelib/dependency.rake

@@ -5,7 +5,7 @@ namespace "dependency" do
   end
 
   task "clamp" do
-    Rake::Task["gem:require"].invoke("clamp", "~> 0.6.5")
+    Rake::Task["gem:require"].invoke("clamp", "~> 0.6")
   end
 
   task "rbx-stdlib" do
@@ -21,7 +21,7 @@ namespace "dependency" do
   end # task stud
 
   task "fpm" do
-    Rake::Task["gem:require"].invoke("fpm", ">= 0")
+    Rake::Task["gem:require"].invoke("fpm", "~> 1.3.3")
   end # task stud
 
   task "rubyzip" do