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Welcome to the topic of 'Deep Dive into Ruby Require.' Please join me in welcoming our speaker, Hiroshi Shibata.
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Hello! I'm happy to present at RubyConf Taiwan again. Today's topic is a deep dive into Ruby require.
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I’m an open-source software developer at Anath and a proud member of Team Ruby and the Bundler team. I work on the Ruby programming language, the Ruby ecosystem, and the infrastructure of Ruby languages. Thank you for using Ruby and Ruby Gems.
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As for my hobbies, I enjoy Ruby programming and game development.
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Recently, I visited the National Parks Museum to see some famous exhibits, and I even got a little crush on something there.
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Now, let me introduce Anath. Anath is a company that provides a SaaS platform for the construction industry, focusing on buildings, housing, etc. We develop many products to help everyone, whether in the office or outdoors.
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Our goal is to enhance happiness through digitalization, and we utilize Ruby throughout our products, including customer management, sales management, and more in the Japanese construction industry.
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The construction industry in Japan is valued at over 10 trillion New Taiwan Dollars, and we need to develop products more quickly with Ruby and Rails.
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Anath strongly supports the Ruby ecosystem by hiring me as a full-time open-source developer for the Ruby language.
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Let’s begin with the first topic of today's presentation: Ruby's require method.
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We'll explore what Ruby requires and how its functionality extends.
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The require method is one of the most recognized methods that allows additional Ruby code to be loaded into your context. For example, if you wish to use the RSS library, it can be easily loaded with require.
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Require is a method that returns true if you successfully load a file. If it cannot find the file, it will search through your Ruby installation path.
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You should note that there are additional methods in Ruby for specific platforms, such as ASO in Linux or DL in Windows. If you require libraries that utilize big decimal, for example, you would check their availability within the required paths.
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While using require, it’s important to understand that Ruby also has a method called require_relative, which only looks in the current directory path.
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This is different from require, which searches through the entire load path.
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You need to include the file name with its extension when using load methods, which allows you to load Ruby code multiple times.
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This differs from require, which only loads a file once.
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If you want to load your code with some modifications in the same process or IRB context, the load methods can be quite useful.
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Another interesting feature of Ruby is `autoload`. This feature only loads Ruby code when a constant is referenced.
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Unlike require, which immediately evaluates code when defined, autoload defers loading until the constant is accessed.
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This results in a faster boot time since it allows you to avoid loading files immediately.
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It’s essential to balance boot time with execution speed, leading us to prefer require over autoload.
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Now, we will discuss how to load external libraries from Ruby Gems.
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Ruby has a library structure defined in Ruby Gems, which is crucial for installing many libraries.
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The two critical parts of Ruby Gems to understand are the gemspec file and the specification class.
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The gemspec file defines the gem's specifications, including the gem's name, version, and platform.
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Ruby Gems extend the original Ruby require method for loading libraries with gem specifications. This extended require is a primary focus of our discussion.
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Tomorrow, Sam, another member of the Ruby Gems and Bundler team, will introduce how Ruby Gems works.
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To begin using the gemspec, you can access the gem.loaded_specs method in IRB at any time.
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For example, the gemspec can reveal the specification of a Rock gem, including its dependencies.
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Dependencies are crucial in this context and often consist of various libraries that support the application.
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Ruby Gems only loads from the load path. However, it extended the capability to automatically search the load paths for dependencies that may not exist.
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Extended require can slow things down due to its searching behavior, so we should be aware.
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For instance, I experienced slower performance in my environment compared to another setup.
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This was particularly evident when loading libraries across multiple Ruby versions due to the size of the gem directory.
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What we’ve learned here is that using original require with specific gems significantly reduces loading time.
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Using the G method, we can specify versions to improve performance.
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This allows you to load specific versions of a library while managing dependencies effectively.
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Thus, extended require makes searching more efficient and results in faster loading.
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Next, let’s look into how Ruby Gems addresses some performance issues by optimizing gem management.
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The flexibility of Ruby Gems allows for detailed management of dependencies, ensuring speed and efficiency in loading.
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Incremental improvements in gem loading methods can greatly enhance the overall speed of Ruby applications.
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Bandra effectively supplements Ruby Gems by providing a user-friendly interface for managing dependencies.
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Tomorrow, we will discuss Bundler's versioning capabilities and integration with Ruby processes.
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As we summarize, it's clear that a deeper understanding of require and Ruby Gems enhances performance.
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In the next segment, we will tackle how to transition libraries effectively from Ruby Gems.
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By specifying gem sources and requirements, you can generate a detailed lock file to manage your application dependencies.
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Lock files provide essential information about which versions of gems to install, ensuring compatibility.
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We will also cover how to overcome common pitfalls of dependency resolution when working with Bundler.
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Understanding how these systems interact will help avoid troubles in future application deployments.
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Moving on, we’ll discuss addressing the issues of conflicting gem versions.
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By leveraging Bundler's functionalities, it is possible to maintain distinct environments for different applications.
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Now let's review how Bundler can optimize gem loading and management in Ruby.
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With a structured approach, Bundler provides options to streamline your process of managing dependencies effectively.
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As we continue, it's vital to understand how to specify options in your configuration for optimal performance.
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The steps outlined will enhance how we handle gem versions and dependencies throughout Ruby applications.
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Lastly, workplace examples are instrumental in demonstrating what works best when deploying Ruby applications.
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Concluding, we will reflect on the key takeaways regarding Bundler's role in ensuring integrity and consistency.
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Ultimately, Ruby's evolution makes it critical to update both applications and processes to maintain performance standards.
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Looking forward to the next Ruby version, anticipating how these changes will impact the ecosystem.
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This session reveals how Bundler can lead to transformative changes within the Ruby community.
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Thank you for your attention, and I look forward to further discussions!
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Now, let's have a Q&A session. Please raise your hand if you have any questions.
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Thank you for your insightful presentation, Hiroshi Shibata!
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I appreciate the depth of information you shared regarding Ruby's require method and Ruby Gems.
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My question pertains to the ongoing transition of default gems becoming bundled gems.
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Is the direction aiming to have all default gems become bundled?
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Hiroshi responded, explaining the plan to transition various gems into the Bundled category but clarifying that core standard libraries will stay separate like net/http.
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Users should keep abreast of which gems are transitioning with each Ruby release.
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Furthermore, Hiroshi assured that efforts will be made to ease the migration process but highlighted challenges that remain.
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Another audience member asked if the Bandra library is implemented in C or Ruby.
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Hiroshi confirmed that it is only implemented in Ruby.
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Participants noted concerns about warnings during version upgrades.
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An interesting problem surfaces regarding how the warning mechanisms function between Ruby and J Ruby.
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Hiroshi reassured everyone that new features would be highlighted within the documentation as improvements continue.
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He encouraged contributions to Ruby's evolving ecosystem to highlight the collaborative efforts behind Ruby.”},{