macOS: MONGO_VERSION parsing fails in shared-functions.sh and reports valid values as invalid

[wavhudimulaudzi]

Running ./bin/up on macOS can fail Mongo version validation even when MONGO_VERSION is valid.

Example error:

---------------------  ERROR  -----------------------
  Invalid MONGO_VERSION: MONGO_VERSION=6.0-jammy

  MONGO_VERSION must start with the actual major version of mongo, followed by a dot.
  Example: MONGO_IMAGE=my.dockerhub.com/custom-mongo
           MONGO_VERSION=6.0-custom
---------------------  ERROR  -----------------------

The error shows the parser returning MONGO_VERSION=... instead of just the value.

Environment

• OS: macOS
• Project: overleaf-toolkit
• Command: ./bin/up
• Config:
  • MONGO_IMAGE=mongo
  • MONGO_VERSION=6.0-jammy (also reproducible with 6.0)

Steps to Reproduce

1. Set in config/overleaf.rc:
   • MONGO_IMAGE=mongo
   • MONGO_VERSION=6.0-jammy
2. Run:

   ./bin/up

3. Observe validation error for MONGO_VERSION.

Expected Behavior

MONGO_VERSION should be parsed as 6.0-jammy and pass validation in read_mongo_version().

Actual Behavior

MONGO_VERSION is parsed as MONGO_VERSION=6.0-jammy, causing this regex check to fail:

[[ ! "$mongo_version" =~ ^([0-9]+)\.(.+)$ ]]

Suspected Root Cause

In lib/shared-functions.sh, parsing helpers:

• read_configuration()
• read_variable()

are involved in extracting values from:

• config/overleaf.rc
• config/variables.env

When extraction returns the full assignment instead of value-only, downstream validation in read_mongo_version() fails.

Proposed Fix

Make read_configuration() and read_variable() robust and platform-independent by:

1. Reading the first matching KEY= line
2. Stripping everything up to the first =
3. Removing optional surrounding matching quotes ("..." or '...')
4. Returning value-only output

This should ensure consistent behavior on macOS and Linux.

Optional Hardening

Add a defensive check in read_mongo_version() to detect accidental malformed values such as MONGO_VERSION=MONGO_VERSION=6.0-jammy and emit a more specific error message.

Affected File

• lib/shared-functions.sh

If you want, I can also give you a shorter “minimal” version for maintainers who prefer compact issues.