• d-bugmail puremagic.com (44/45) Jul 20 2020 https://issues.dlang.org/show_bug.cgi?id=21059

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=21059

          Issue ID: 21059
           Summary: install.sh: posix_terminal returns false on Linux Mint
                    20
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dlang.org
          Assignee: nobody puremagic.com
          Reporter: john.michael.hall gmail.com

As originally discussed at 
https://forum.dlang.org/post/jvslnzlphrvjffixymys forum.dlang.org


I just upgraded a machine to Linux Mint 20 on a fresh install and tried to run
the install script. It fails with
main: line 178: USERPROFILE: unbound variable

This line should only be called on Windows, which I found strange. It turns out
that this is driven by

```
posix_terminal() {

bash.exe,

 1.

    if [ "$SHLVL" = 1 ]; then
        false
    else
        true
    fi
}
```

Running `echo $SHLVL` prints `1`

Running
```
bash
echo $SHLVL
```
prints `2`


Running `echo $SHELL` prints `/bin/bash`

The issue seems to be related to an update to Ubuntu 16:
https://askubuntu.com/questions/856532/why-is-shlvl-initially-2-in-ubuntu-16-10-but-not-earlier-versions

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