# Install weggli with Homebrew, apk, Nix, zypper Fast and robust semantic search tool for C and C++ codebases. Version 0.2.4 via Homebrew; verified from local package data. Also installable with nix: nix profile install nixpkgs#weggli. ## Install ```sh sudo av install brew:weggli ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install weggli ``` Evidence: local Homebrew formula metadata ### Linux - apk (92%): ```sh sudo apk add weggli ``` Evidence: Alpine Linux edge package indexes: weggli from https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz - Nix (92%): ```sh nix profile install nixpkgs#weggli ``` Evidence: nixpkgs package indexes: pkgs/by-name/we/weggli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - zypper (92%): ```sh sudo zypper install weggli ``` Evidence: openSUSE Tumbleweed package metadata: weggli from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst ## Package facts - **Package key:** brew:weggli - **Package manager:** Homebrew - **Version:** 0.2.4 - **Source summary:** Fast and robust semantic search tool for C and C++ codebases - **Homepage:** - **Repository:** - **Generated:** 2026-08-03T19:37:03+00:00 ## Executables - weggli (alias) ## Install behavior - Bottle: not available ## Freshness - Page generated: 2026-08-03 - Package-manager version: 0.2.4 ## Project history and usage weggli is a Rust semantic-search tool for C and C++ codebases, designed for security researchers who want fast, code-shaped queries over large or incomplete source trees. Its README says it matches user-provided patterns on abstract syntax trees and uses a query language that resembles C and C++. ### Project history The current GitHub repository was created in September 2021, and crates.io metadata shows package publication beginning in October 2021. The README states that weggli is inspired by Semgrep, Coccinelle, joern, and CodeQL, but intentionally makes different tradeoffs for C/C++ review. Those tradeoffs define the project: first-class support for modern C++ constructs, minimal setup without requiring a successful build, interactive performance, and greedy matching that finds useful variants even at the cost of false positives. The implementation is built on tree-sitter C and C++ grammars, with queries translated into tree-sitter query machinery plus weggli-specific behavior. ### Adoption history weggli's adoption is strongest in vulnerability research and manual code-review circles rather than general developer search. A 2024 HN Security article described converting C/C++ vulnerability patterns from Semgrep into weggli queries and using the tool to identify hotspots such as buffer overflows, integer issues, format strings, memory-management mistakes, and command-injection patterns. By July 2026, the repository had about 2.5 thousand GitHub stars, which is sizable for a specialized security CLI. Its package-manager niche is clear: it gives reviewers a fast semantic grep for C and C++ without requiring a full CodeQL database, compiler build, or heavyweight SAST workflow. ### How it is used A typical invocation is `weggli `, where the pattern is written in a C/C++-like language with metavariables and wildcards. For example, patterns can look for a stack buffer followed by a `memcpy` call, suspicious arithmetic before allocation, or API-specific call sequences. In practice, users run weggli interactively while reading source: write a pattern, inspect matches, refine the query, and then manually audit nearby code. It is especially useful for variant analysis after one bug is found and for quickly mapping attack-surface idioms in unfamiliar C/C++ projects. ### Why package nerds care weggli is package-nerd significant because it is the small, installable middle ground between `grep` and heavyweight static-analysis platforms. It makes AST-aware C/C++ searching feel like a fast CLI habit rather than an infrastructure project. ### Timeline - 2021-09: GitHub repository created. - 2021-10: crates.io package created and early 0.2.x releases began. - 2022-05: v0.2.4 release published. - 2024-01: HN Security published a practitioner pattern collection and workflow article for C/C++ vulnerability research. ### Related projects - The README names Semgrep, Coccinelle, joern, and CodeQL as inspirations. In use, weggli is closest to a semantic grep for C/C++ reviewers, while those related tools cover broader rule management, program analysis, source transformation, or database-backed code queries. ### Sources - - - - - ## Security Notes narrow executable package without higher-risk signals. - **Geiger risk:** green / low - narrow executable package without higher-risk signals ## Other Package-Manager Records - Nix - weggli: normalized package name match | nixpkgs package indexes: pkgs/by-name/we/weggli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - apk - weggli - 0.2.4-r1: normalized package name match | Alpine Linux edge package indexes: weggli from https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz | Semantic search tool for C and C++ codebases | https://github.com/googleprojectzero/weggli - zypper - weggli - 0.2.4-2.13: normalized package name match | openSUSE Tumbleweed package metadata: weggli from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | A semantic search tool for C and C++ codebases | https://github.com/googleprojectzero/weggli ## Combined YAML source View the package source record on GitHub. [combined/weggli.yml](https://github.com/mxcl/pkgdb/blob/main/combined/weggli.yml) ## Sources - pkg.so package database - Geiger risk classifier - curated package history - pkgdb category and tag curation - external package-manager database matches - cross-ecosystem install command graph