Devcontainer setup ad-hoc parsing fails on Rocky 8.5

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.92.0 (Commit: b1c0a14de1414fcdaa400695b4db1c0799bc3124)
• OS Version: Rocky Linux 8.5

The check-requirements-linux.sh script that runs as part of a devcontainer setup wants to parse the OS version from /etc/os-release. That file "is a newline-separated list of environment-like shell-compatible variable assignments" (see man os-relase on Linux). The script tries to parse the value it wants here, by running:

OS_ID="$(cat /etc/os-release | grep -Eo 'ID=([^"]+)' | sed -n '1s/ID=//p')"

This looks for a key-value pair of the form ID=value and strips out the ID= part. It assumes the pair is not of the form ID="value", which appears to be permitted by the file format, and appears in the wild in Rocky 8.5 where the relevant line reads:

ID="rocky"

In that case the grep command will fail to match the line and the value of OS_ID will be empty, resulting in a non-zero exit code of 1.

This could be fixed by changing the variable assignment to:

OS_ID=$(source /etc/os-release && echo $ID)

This will run a subshell in which the values in the file get assigned to environment variables, which removes any surrounding " marks. Since this runs in a subshell the current shell's environment will not pick up these variables.

Steps to Reproduce:

1. Start a devcontainer built from Rocky 8.5.