Set up JRuby dev environment

.zshrc

@@ -12,7 +12,7 @@ export VISUAL='code --wait'
 export TERM=xterm-256color
 export XDG_CONFIG_HOME=$HOME/.config
 export ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=("${(@)ZSH_AUTOSUGGEST_ACCEPT_WIDGETS:#forward-char}")
-export PATH="/home/app/hetzner-k3s/bin:$HOME/.krew/bin:./bin:$HOME/bin:$GOPATH/bin:$PATH"
+export PATH="/home/app/hetzner-k3s/bin:$HOME/.krew/bin:./bin:$HOME/bin:$GOPATH/bin:/bundle/bin:$PATH"
 export HISTFILE="/home/app/hetzner-k3s/.zsh_history"
 
 source $ZSH/oh-my-zsh.sh

Dockerfile.dev

@@ -1,11 +1,12 @@
-FROM alpine:3.19.1
+# syntax=docker/dockerfile:1.4
 
-RUN apk update \
-  && apk add --update --no-cache gcc gmp-dev libevent-static musl-dev pcre-dev pcre2-dev libxml2-dev \
-    libxml2-static openssl-dev openssl-libs-static tzdata yaml-static zlib-static xz-static \
-    make git autoconf automake libtool patch libssh2-static libssh2-dev crystal shards \
-    curl docker zsh bash openssl k9s shadow go \
-    gcc g++ libc-dev libxml2-dev openssl-dev yaml-dev zlib-dev crystal openssh-client
+FROM jruby:9.4.6.0-jre8
+
+RUN --mount=type=cache,id=dev-apt-cache,sharing=locked,target=/tmp/cache/apt-cache \
+    --mount=type=cache,id=dev-apt-lib,sharing=locked,target=/tmp/cache/apt-lib \
+    apt-get update -qq \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -yq build-essential git-core wget ripgrep zsh gnupg2 curl ca-certificates apt-transport-https \
+    && rm -rf /var/lib/apt/lists/*
 
 RUN curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/$(uname -m | sed -e 's/x86_64/amd64/' -e 's/aarch64/arm64/')/kubectl" && chmod +x ./kubectl && mv ./kubectl /usr/local/bin/kubectl
 
@@ -24,11 +25,23 @@ RUN set -x; cd "$(mktemp -d)" \
 
 RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
 
-ENV GOPATH=/root/go
+ENV GEM_HOME="/bundle" \
+    GEM_PATH="/bundle" \
+    APP_PATH="/home/app/hetzner-k3s" \
+    BUNDLE_PATH="/bundle" \
+    BUNDLE_APP_CONFIG="/bundle" \
+    BUNDLE_SILENCE_ROOT_WARNING=1 \
+    LANG=C.UTF-8 LC_ALL=C.UTF-8 \
+    GOPATH=/root/go
 
 RUN mkdir -p $GOPATH/bin
 
-RUN go install github.com/stern/stern@latest
+RUN wget https://go.dev/dl/go1.21.0.linux-$(uname -m | sed -e 's/x86_64/amd64/' -e 's/aarch64/arm64/').tar.gz \
+  && tar -xvf go1.21.0.linux-$(uname -m | sed -e 's/x86_64/amd64/' -e 's/aarch64/arm64/').tar.gz \
+  && rm -rf /usr/local/go \
+  && mv go /usr/local \
+  && rm -rf go1.21.0.linux-$(uname -m | sed -e 's/x86_64/amd64/' -e 's/aarch64/arm64/').tar.gz \
+  && /usr/local/go/bin/go install github.com/stern/stern@latest
 
 SHELL ["/bin/zsh", "-c"]
 

Gemfile

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# gem "rails"

config/warble.rb

@@ -0,0 +1,182 @@
+# Disable Rake-environment-task framework detection by uncommenting/setting to false
+# Warbler.framework_detection = false
+
+# Warbler web application assembly configuration file
+Warbler::Config.new do |config|
+  # Features: additional options controlling how the jar is built.
+  # Currently the following features are supported:
+  # - *gemjar*: package the gem repository in a jar file in WEB-INF/lib
+  # - *executable*: embed a web server and make the war executable
+  # - *runnable*: allows to run bin scripts e.g. `java -jar my.war -S rake -T`
+  # - *compiled*: compile .rb files to .class files
+  config.features = %w(runnable)
+
+  # Application directories to be included in the webapp.
+  config.dirs = %w(bin lib)
+
+  # Additional files/directories to include, above those in config.dirs
+  # config.includes = FileList["db"]
+
+  # Additional files/directories to exclude
+  # config.excludes = FileList["lib/tasks/*"]
+
+  # Additional Java .jar files to include.  Note that if .jar files are placed
+  # in lib (and not otherwise excluded) then they need not be mentioned here.
+  # JRuby and JRuby-Rack are pre-loaded in this list.  Be sure to include your
+  # own versions if you directly set the value
+  # config.java_libs += FileList["lib/java/*.jar"]
+
+  # Loose Java classes and miscellaneous files to be included.
+  # config.java_classes = FileList["target/classes/**.*"]
+
+  # One or more pathmaps defining how the java classes should be copied into
+  # the archive. The example pathmap below accompanies the java_classes
+  # configuration above. See http://rake.rubyforge.org/classes/String.html#M000017
+  # for details of how to specify a pathmap.
+  # config.pathmaps.java_classes << "%{target/classes/,}p"
+
+  # Bundler support is built-in. If Warbler finds a Gemfile in the
+  # project directory, it will be used to collect the gems to bundle
+  # in your application. If you wish to explicitly disable this
+  # functionality, uncomment here.
+  config.bundler = true
+
+  # An array of Bundler groups to avoid including in the war file.
+  # Defaults to ["development", "test", "assets"].
+  # config.bundle_without = []
+
+  # Other gems to be included. If you don't use Bundler or a gemspec
+  # file, you need to tell Warbler which gems your application needs
+  # so that they can be packaged in the archive.
+  # For Rails applications, the Rails gems are included by default
+  # unless the vendor/rails directory is present.
+  # config.gems += ["activerecord-jdbcmysql-adapter", "jruby-openssl"]
+  # config.gems << "tzinfo"
+
+  # Uncomment this if you don't want to package rails gem.
+  # config.gems -= ["rails"]
+
+  # The most recent versions of gems are used.
+  # You can specify versions of gems by using a hash assignment:
+  # config.gems["rails"] = "4.2.5"
+
+  # You can also use regexps or Gem::Dependency objects for flexibility or
+  # finer-grained control.
+  # config.gems << /^sinatra-/
+  # config.gems << Gem::Dependency.new("sinatra", "= 1.4.7")
+
+  # Include gem dependencies not mentioned specifically. Default is
+  # true, uncomment to turn off.
+  # config.gem_dependencies = false
+
+  # Array of regular expressions matching relative paths in gems to be
+  # excluded from the war. Defaults to empty, but you can set it like
+  # below, which excludes test files.
+  # config.gem_excludes = [/^(test|spec)\//]
+
+  # Pathmaps for controlling how application files are copied into the archive
+  # config.pathmaps.application = ["WEB-INF/%p"]
+
+  # Name of the archive (without the extension). Defaults to the basename
+  # of the project directory.
+  config.jar_name = "hetzner-k3s"
+
+  # File extension for the archive. Defaults to either 'jar' or 'war'.
+  config.jar_extension = "jar"
+
+  # Destionation for the created archive. Defaults to project's root directory.
+  # config.autodeploy_dir = "dist/"
+
+  # Name of the MANIFEST.MF template for the war file. Defaults to a simple
+  # MANIFEST.MF that contains the version of Warbler used to create the war file.
+  # config.manifest_file = "config/MANIFEST.MF"
+
+  # When using the 'compiled' feature and specified, only these Ruby
+  # files will be compiled. Default is to compile all \.rb files in
+  # the application.
+  # config.compiled_ruby_files = FileList['app/**/*.rb']
+
+  # Determines if ruby files in supporting gems will be compiled.
+  # Ignored unless compile feature is used.
+  # config.compile_gems = false
+
+  # When set it specify the bytecode version for compiled class files
+  # config.bytecode_version = "1.6"
+
+  # When set to true, Warbler will override the value of ENV['GEM_HOME'] even it
+  # has already been set. When set to false it will use any existing value of
+  # GEM_HOME if it is set.
+  # config.override_gem_home = true
+
+  # Allows for specifing custom executables
+  # config.executable = ["rake", "bin/rake"]
+
+  # Sets default (prefixed) parameters for the executables
+  # config.executable_params = "do:something"
+
+  # If set to true, moves jar files into WEB-INF/lib. Prior to version 1.4.2 of Warbler this was done
+  # by default. But since 1.4.2 this config defaults to false. It may need to be set to true for
+  # web servers that do not explode the WAR file.
+  # Alternatively, this option can be set to a regular expression, which will
+  # act as a jar selector -- only jar files that match the pattern will be
+  # included in the archive.
+  # config.move_jars_to_webinf_lib = false
+
+  # === War files only below here ===
+
+  # Embedded webserver to use with the 'executable' feature. Currently supported
+  # webservers are:
+  # - *jetty* - Embedded Jetty from Eclipse
+  # config.webserver = 'jetty'
+
+  # Path to the pre-bundled gem directory inside the war file. Default
+  # is 'WEB-INF/gems'. Specify path if gems are already bundled
+  # before running Warbler. This also sets 'gem.path' inside web.xml.
+  # config.gem_path = "WEB-INF/vendor/bundler_gems"
+
+  # Files for WEB-INF directory (next to web.xml). This contains
+  # web.xml by default. If there is an .erb-File it will be processed
+  # with webxml-config. You may want to exclude this file via
+  # config.excludes.
+  # config.webinf_files += FileList["jboss-web.xml"]
+
+  # Files to be included in the root of the webapp.  Note that files in public
+  # will have the leading 'public/' part of the path stripped during staging.
+  # config.public_html = FileList["public/**/*", "doc/**/*"]
+
+  # Pathmaps for controlling how public HTML files are copied into the .war
+  # config.pathmaps.public_html = ["%{public/,}p"]
+
+  # Value of RAILS_ENV for the webapp -- default as shown below
+  # config.webxml.rails.env = ENV['RAILS_ENV'] || 'production'
+
+  # Public ROOT mapping, by default assets are copied into .war ROOT directory.
+  # config.public.root = ''
+
+  # Application booter to use, either :rack or :rails (autodetected by default)
+  # config.webxml.booter = :rails
+
+  # When using the :rack booter, "Rackup" script to use.
+  # - For 'rackup.path', the value points to the location of the rackup
+  # script in the web archive file. You need to make sure this file
+  # gets included in the war, possibly by adding it to config.includes
+  # or config.webinf_files above.
+  # - For 'rackup', the rackup script you provide as an inline string
+  #   is simply embedded in web.xml.
+  # The script is evaluated in a Rack::Builder to load the application.
+  # Examples:
+  # config.webxml.rackup.path = 'WEB-INF/hello.ru'
+  # config.webxml.rackup = %{require './lib/demo'; run Rack::Adapter::Camping.new(Demo)}
+  # config.webxml.rackup = require 'cgi' && CGI::escapeHTML(File.read("config.ru"))
+
+  # Control the pool of Rails runtimes. Leaving unspecified means
+  # the pool will grow as needed to service requests. It is recommended
+  # that you fix these values when running a production server!
+  # If you're using threadsafe! mode, you probably don't want to set these values,
+  # since 1 runtime(default for threadsafe mode) will be enough.
+  # config.webxml.jruby.min.runtimes = 2
+  # config.webxml.jruby.max.runtimes = 4
+
+  # JNDI data source name
+  # config.webxml.jndi = 'jdbc/rails'
+end

docker-compose.yml

@@ -3,6 +3,7 @@ version: '3.8'
 volumes:
   kube:
   vscode_cache:
+  bundle:
 
 services:
   hetzner-k3s:
@@ -14,4 +15,5 @@ services:
       - ${HOME}/.ssh:/root/.ssh
       - /var/run/docker.sock:/var/run/docker.sock
       - kube:/root/.kube
-      - vscode_cache:/vscode/vscode-server:cache
+      - vscode_cache:/vscode/vscode-server
+      - bundle:/bundle