standard-version updater for Leiningen project.clj

.versionrc.js

// standard-version updater to read and write project version from/to Leiningen project.clj.
const defProjectRegex = /\(defproject\s+([a-z\./-]+)\s+\"([^\"]+)\".*/;

module.exports = {
    bumpFiles: [{
        filename: 'project.clj',
        updater: {
            readVersion: function(contents) {
                const lines = contents.split("\n");
                const defProject = lines[0];
                match = defProjectRegex.exec(defProject)
                if (match === null) {
                    throw new Error('Cannot read version from project.clj');
                }
                return match[2];
            },

            writeVersion: function(contents, version) {
                const lines = contents.split("\n");
                const defProject = lines[0];
                const defProjectUpdated = defProject.replace(
                    defProjectRegex,
                    "(defproject $1 \"" + version + "\""
                );
                if (defProject.trim() == defProjectUpdated.trim()) {
                    console.warn('Failed to update project.clj. Contents are identical!');
                }
                lines[0] = defProjectUpdated;
                return lines.join("\n");
            }
        }
    }]
};