This repository contains `clojure-mode`, an Emacs major mode for editing Clojure, ClojureScript, and related languages. The system provides syntax highlighting (font-lock), indentation, navigation, and a suite of refactoring commands directly in the editor. The architecture is a single large Emacs Lisp file (`clojure-mode.el`) with an additional extra font-locking package. It defines a base `clojure-mode` derived from `prog-mode`, plus derived modes for ClojureScript, ClojureC, ClojureDart, Joker, Jank, and EDN data files. Key entry points are the mode activation functions and interactive commands like `clojure-align`, `clojure-thread`, `clojure-cycle-privacy`, etc. The indentation engine uses a backtracking algorithm that walks up the sexp tree to apply contextual indent specs (shared with `clojure-ts-mode`). Font-locking is regex-based and extensible, with special handling for docstrings, discard macros, and character literals. The package depends only on standard Emacs libraries (`cl-lib`, `imenu`, `align`, `subr-x`) and requires Emacs 27.1+.
es-mode is an Emacs major mode for editing and executing Elasticsearch queries. It provides syntax highlighting, indentation, and keybindings for interacting with Elasticsearch clusters directly from Emacs buffers. The package includes features such as executing requests with C-c C-c, navigating between requests, copying requests as curl commands, an Elasticsearch Command Center for cluster monitoring, org-babel support for embedding queries in org-mode documents, and an interactive ESQL mode for Elasticsearch's ES|QL language. The architecture follows standard Emacs package conventions with several modular components: es-mode.el provides the core editing functionality, es-cc.el implements a monitoring dashboard, es-copyas.el handles request copying, es-esql.el offers an interactive ESQL interface, and ob-elasticsearch.el enables org-babel integration. The mode communicates with Elasticsearch using HTTP requests via the request library, displaying results in separate buffers with syntax highlighting and optional jq processing. Key strengths include thoughtful integration with Emacs workflows (company-mode completion, proper indentation, hook systems), robust error handling for network requests, and useful features like variable substitution in org-babel blocks and historical metric visualization in the command center. The code demonstrates solid Emacs Lisp craftsmanship with appropriate use of buffers, hooks, and asynchronous operations.
Smartparens is a mature Emacs minor mode for intelligent handling of parentheses, brackets, quotes, and other delimiters. It provides automatic pair insertion, wrapping, slurping/barfing (like Paredit), navigation by balanced expressions, and a strict mode that enforces structural balance. The core functionality is implemented in `smartparens.el`, with language-specific support modules for over 20 major modes (Python, Ruby, Rust, LaTeX, Clojure, etc.) that define custom pairs, skip-match predicates, and context-sensitive actions. The architecture is modular: the core exports a pair definition system (`sp-pair`, `sp-local-pair`) with fine-grained action hooks, context predicates, and prefix/suffix handling, while each language module registers its own configurations. The package is heavily customizable via `defcustom` and exposes interactive commands for everyday editing. The test suite is extensive, with over 60 test files using ERT and a custom macro framework that makes writing buffer-level behavior tests concise. The codebase demonstrates solid Emacs Lisp craftsmanship, with thoughtful use of macros, memoization, and backward-compatibility hacks. However, it shows signs of accumulated complexity, with some deprecated aliases, `defadvice` usage, and version-conditional code. The CI pipeline covers multiple Emacs versions and runs byte-compilation checks, indicating ongoing maintenance despite these legacy patterns. This is a well-known, actively developed package relied on by thousands of users. Its primary value is as an Emacs library, though patterns like the pair configuration system and test helper macros could inspire similar designs in other editor extensions or text-processing tools.
This is an Emacs major mode for managing the password-store (pass) keychain. It provides a directory-tree buffer listing password entries and directories, with keybindings to copy passwords, usernames, and URLs to the kill ring, edit, rename, delete, insert entries, and browse URLs. The package integrates with password-store-otp for two-factor authentication, displaying OTP tokens and countdown timers in entry view buffers. The architecture is a single-file Emacs Lisp library defining two major modes: `pass-mode` for the main store buffer and `pass-view-mode` for viewing individual encrypted files. It relies on external Emacs packages `password-store`, `password-store-otp`, and `f`, and ultimately the system `pass` CLI. The code is well-structured, follows Emacs Lisp conventions, uses macros for common patterns, and provides proper configuration options. However, the test suite is essentially empty, which limits confidence in long-term stability. The package is published on MELPA and integrates with common Emacs workflows, making it a practical tool for password management within Emacs.