Rails 6.0.3.2 on Termux

note.txt

Rails 6.0.3.2 on Termux

pkg upgrade
pkg install ruby vim git nodejs

nokogiri will build natively and would need the ff packages and will need pkg-config to find them:

    libxml-2
    libxslt
    libexslt

pkg install pkg-config

libxml-2 (2.9.10-3) is installed when you run:
pkg install build-essentials

pkg install libxslt

pkg install libexslt will not work, I guess it's already bundled with libxslt

tried running:
gem install nokogiri -- --use-system-libraries
nokogiri was successfully installed

finally install rails without docs, we dont want them taking up space:
gem install rails --no-doc

libsqlite for sqlite3 gem
pkg install libsqlite

install yarn first before running rails new:
pkg install yarn

ffi and rb-inotify are already included via bundle when you run:
rails new

gem install tzinfo-data

tzinfo-data issue when running rails server:
rubygems/rubygems#3212

try removing the Gemfile.lock and running the bundle install again.
or
Running bundle update tzinfo

What worked for me is:
changing
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
to
gem 'tzinfo-data'

then deleting Gemfile.lock and running bundle install again

now run the server via `rails server` and browse `localhost:3000` on any browser on your device.

All is well until we create our first controller and change the routes root path:

    rails generate controller Dashboard index

and on config/routes.rb file:

    root to: 'dashboard#index'

then browsing again to our browser on `localhost:3000` gives us this ActionVew::TemplateError:

    Webpacker can't find application in <my app path>/public/packs/manifest.json. Possible causes:
    1. You want to set webpacker.yml value of compile to true for your environment
       unless you are using the `webpack -w` or the webpack-dev-server.
    2. webpack has not yet re-run to reflect updates.
    3. You have misconfigured Webpacker's config/webpacker.yml file.
    4. Your webpack configuration is not creating a manifest.
    Your manifest contains:
    {
    }

tried running compilation on test environment:

    RAILS_ENV=test NODE_ENV=test bundle exec rails webpacker:compile

this returns `Errno::EACCES: Permission denied @ rb_sysopen`

I haven found a solution to this issue at the time of this writing.

    RAILS_ENV=development NODE_ENV=development bundle exec rails webpacker:compile

got an error `webpack command is not found`
added webpack via:

    yarn add webpack

then re-ran `RAILS_ENV=development NODE_ENV=development bundle exec rails webpacker:compile`
it will ask: "Do you want to install 'webpack-cli' (yes/no):

    yes

then Termux bugs out with repeated:
y
y
y
y
y
y
y
y
y
y... endlessly

add webpack-cli manually and @rails/webpacker module:

    yarn add webpack-cli -D
    yarn add @rails/webpacker

we also need python2

    pkg install python2

try running:

    rails assets:precompile

just figured the above code is the shorthand for `RAILS_ENV=development NODE_ENV=development bundle exec rails webpacker:compile`