omniroute update always failed on a global install:
- getCurrentVersion() read package.json from process.cwd(), which on a global
npm/brew install is the user's working dir, not the package root → null →
'Could not determine current version'.
- createBackup() resolved bin/ from cwd too, and passed the 'cli' directory to
copyFileSync → EISDIR, swallowed by the catch → 'Failed to create backup'.
Both now resolve package.json/bin relative to the script via import.meta.url,
and the backup uses cpSync({recursive:true}) so the cli/ directory is copied.
Co-authored-by: uniQta <uniQta@users.noreply.github.com>
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