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TiddlyWiki5/bin/get-plugin-library-version-number

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#!/usr/bin/env node
// Extract raw version number from package.json (without the optional "-prerelease" suffix)
if(!process.env["TW5_BUILD_TIDDLYWIKI"]) {
throw "TW5_BUILD_TIDDLYWIKI environment variable not set";
}
var fs = require("fs"),
path = require("path");
var filename = path.resolve(path.dirname(process.env["TW5_BUILD_TIDDLYWIKI"]),"./package.json"),
json = JSON.parse(fs.readFileSync(filename,"utf8"));
if(!json.version) {
throw "Missing version number in package.json";
}
process.stdout.write("v" + json.version.split("-")[0]);