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Clojure Analysis

When developing in Clojure, leiningen is the most common package manager. Dependencies are specified in a manifest file by users which is used by the lein tool to build a dependency graph and download the correct dependencies.

Strategy Direct Deps Transitive Deps Edges Container Scanning
lein deps ✅ ✅ ✅ ❌

Project Discovery

In order to find Leiningen projects, we look for project.clj files which specify the root of a Leiningen project. Once we find a leiningen file we quit walking the file tree because the downloaded dependencies will have their own project.clj files in subdirectories which would create an incorrect dep graph if scanned.

Analysis

  1. run lein deps :tree-data and generate output similar to:
{[clojure-complete "0.2.5" :exclusions [[org.clojure/clojure]]] nil,
 [koan-engine "0.2.5"] {[fresh "1.0.2"] nil},
 [lein-koan "0.1.5" :scope "test"] nil,
 [nrepl "0.6.0" :exclusions [[org.clojure/clojure]]] nil,
 [org.clojure/clojure "1.10.0"]
 {[org.clojure/core.specs.alpha "0.2.44"] nil,
  [org.clojure/spec.alpha "0.2.176"] nil}}
  1. Parse this output to determine the full dependency graph and dependency versions.
  2. Dependencies which have the same groupID and artifactID (nrepl above) are expanded to satisfy Maven's repository standard. The differences can be seen in this link where only nrepl is required by Leiningen, but nrepl:nrepl is required by Gradle and Maven.