The blog post argues that the current approach to software versioning and breaking changes, particularly the emphasis on Semantic Versioning (SemVer), is flawed. It contends that breaking changes are inevitable and often subjective, making strict adherence to SemVer impractical and sometimes misleading. Instead of focusing on meticulously categorizing every change, the author proposes a simpler approach: clearly document all changes, regardless of their perceived impact, and empower users with robust tooling to navigate and manage these changes effectively. This includes tools for automated code modification and comprehensive diffing, enabling developers to adapt to changes smoothly even without perfect backwards compatibility. The core message is that thoughtful documentation and effective tooling are more valuable than rigidly adhering to a potentially arbitrary versioning scheme.
The Hacker News post discusses whether any programming languages allow specifying package dependencies directly within import or include statements, rather than separately in a dedicated dependency management file. The original poster highlights the potential benefits of this approach, such as improved clarity and ease of understanding dependencies for individual files. They suggest a syntax where version numbers or constraints could be incorporated into the import statement itself. While no existing mainstream languages seem to offer this feature, some commenters mention related concepts like import maps in JavaScript and conditional imports in some languages. The core idea is to make dependency management more localized and transparent at the file level.
The Hacker News comments discuss the pros and cons of specifying package requirements directly within import statements. Several commenters appreciate the clarity and explicitness this would bring, as it makes dependencies immediately obvious and reduces the need for separate dependency management files. Others argue against it, citing potential drawbacks like redundancy, increased code verbosity, and difficulties managing complex dependency graphs. Some propose alternative solutions, like embedding version requirements in comments or using language-specific mechanisms for dependency specification. A few commenters mention existing languages or tools that offer similar functionality, such as Nix and Dhall, pointing to these as potential examples or inspiration for how such a system could work. The discussion also touches on the practical implications for tooling and build systems, with commenters considering the impact on IDE integration and compilation processes.
Summary of Comments ( 29 )
https://news.ycombinator.com/item?id=43497506
Hacker News users generally agreed with the author's premise that breaking changes are often overemphasized, particularly in the context of libraries. Several commenters highlighted the importance of semantic versioning as a tool for managing change, not a rigid constraint. Some suggested that breaking changes are sometimes necessary for progress and that the cost of avoiding them can outweigh the benefits. A compelling point raised was the distinction between breaking changes for library authors versus application developers, with more leniency afforded to applications. Another commenter offered an alternative perspective, suggesting the "silly" aspect is actually the over-reliance on libraries instead of building simpler solutions in-house. Others noted the prevalence of "dependency hell" caused by frequent updates, even without breaking changes. Finally, the inherent tension between maintaining backwards compatibility and improving software was acknowledged as a complex issue.
The Hacker News post titled "The way we're thinking about breaking changes is silly" generated a moderate amount of discussion with a mix of agreement, disagreement, and nuanced perspectives on the topic of semantic versioning and breaking changes.
Several commenters echoed the author's sentiment that focusing solely on the mechanical aspects of breaking changes, like changing a function signature, misses the broader point of whether a change actually breaks existing user workflows. They argued that a purely semantic approach can lead to situations where a technically non-breaking change (e.g., adding a new parameter with a default value) disrupts user expectations or requires them to modify their code for reasons other than functionality changes. This sentiment was expressed through anecdotes of libraries subtly changing behavior despite adhering to semantic versioning, causing frustration and unexpected integration work for users.
Some commenters took a more pragmatic stance, acknowledging the limitations of semantic versioning but defending its value as a useful tool. They pointed out that while it's not perfect, it provides a baseline level of predictability and allows developers to automate dependency management and updates. They suggested that the problem isn't semantic versioning itself, but rather its misapplication or overly rigid interpretation.
A few commenters offered alternative approaches to managing breaking changes, such as emphasizing thorough testing and communication with users. They suggested that automated tests specifically designed to catch unintended behavioral changes could be more effective than relying solely on semantic versioning. Clear and proactive communication with users about potential changes, even those technically non-breaking, was also highlighted as a key factor in mitigating disruption.
Another line of discussion focused on the trade-offs between stability and evolution. Commenters acknowledged the tension between maintaining backwards compatibility and introducing necessary improvements or new features. They explored strategies like providing long-term support branches for older versions, allowing users to gradually migrate to newer versions without immediate disruption.
There was also discussion about the role of tooling and static analysis in detecting breaking changes. Some commenters suggested that more sophisticated tools could help identify potential issues that might not be caught by a simple semantic version check.
Finally, a few commenters raised the issue of differing interpretations of what constitutes a "breaking change" across different programming languages and communities. They emphasized the importance of clear documentation and community guidelines to ensure consistent understanding and application of versioning principles.