1 files changed, 48 insertions, 0 deletions
diff --git a/node_modules/semver/functions/truncate.js b/node_modules/semver/functions/truncate.js
new file mode 100644
index 0000000..8314e4e
--- /dev/null
+++ b/node_modules/semver/functions/truncate.js
@@ -0,0 +1,48 @@
+'use strict'
+
+const parse = require('./parse')
+const constants = require('../internal/constants')
+const SemVer = require('../classes/semver')
+
+const truncate = (version, truncation, options) => {
+  if (!constants.RELEASE_TYPES.includes(truncation)) {
+    return null
+  }
+
+  const clonedVersion = cloneInputVersion(version, options)
+  return clonedVersion && doTruncation(clonedVersion, truncation)
+}
+
+const cloneInputVersion = (version, options) => {
+  const versionStringToParse = (
+    version instanceof SemVer ? version.version : version
+  )
+
+  return parse(versionStringToParse, options)
+}
+
+const doTruncation = (version, truncation) => {
+  if (isPrerelease(truncation)) {
+    return version.version
+  }
+
+  version.prerelease = []
+
+  switch (truncation) {
+    case 'major':
+      version.minor = 0
+      version.patch = 0
+      break
+    case 'minor':
+      version.patch = 0
+      break
+  }
+
+  return version.format()
+}
+
+const isPrerelease = (type) => {
+  return type.startsWith('pre')
+}
+
+module.exports = truncate