Correctly handle pre-version for plugins checks

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/version.js b/lib/version.js
new file mode 100644
index 0000000..f0ae187
--- /dev/null
+++ b/lib/version.js
@@ -0,0 +1,19 @@
+var semver = require('semver');
+var pkg = require('../package.json');
+
+var VERSION = pkg.version;
+var VERSION_STABLE = VERSION.replace(/\-(\S+)/g, '');
+
+// Test if current current gitbook version satisfies a condition
+// We can't directly use samver.satisfies since it will break all plugins when gitbook version is a prerelease (beta, alpha)
+function satisfies(condition) {
+    // Test with real version
+    if (semver.satisfies(VERSION, condition)) return true;
+
+    // Test with future stable release
+    return semver.satisfies(VERSION_STABLE, condition);
+}
+
+module.exports = {
+    satisfies: satisfies
+};