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

--- Comment #1 from John Hall <john.michael.hall@gmail.com> ---
Comments on the forum from Bastiaan Veelo suggested that the issue is not related to a specific version of Ubuntu, but may be due to how bash is (or is not) called.

This also is an issue for using docker. https://github.com/dlang/installer/commit/e084815001390538bbd6fe5be7c2d4d81ee681b7#commitcomment-40487617

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

Bastiaan Veelo <Bastiaan@Veelo.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Bastiaan@Veelo.net

--- Comment #2 from Bastiaan Veelo <Bastiaan@Veelo.net> ---
Confirmed:

$ curl -fsS https://dlang.org/install.sh | bash -s dmd main: line 178: USERPROFILE: unbound variable

Workaround:

$ wget https://dlang.org/install.sh
$ chmod +x install.sh
$ ./install.sh
$ source ~/dlang/dmd-2.093.0/activate
$ dmd --version
DMD64 D Compiler v2.093.0
Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved
written by Walter Bright

So the pipe into bash does not seem to increment $SHLVL.

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

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
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           Keywords|                            |pull

--- Comment #3 from Dlang Bot <dlang-bot@dlang.rocks> ---
@veelo created dlang/installer pull request #463 "Fixes issue 21059: installer fails when piped on Posix." fixing this issue:

- Fixes issue 21059.

  The assumption that $SHLVL increases when the script is run does not always
hold. $SHLVL does not increase if the script is piped into bash, thereby
failing to detect Posix. If the default terminal shell is not bash, $SHLVL
might also be 1 on Posix.

https://github.com/dlang/installer/pull/463

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

Dlang Bot <dlang-bot@dlang.rocks> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from Dlang Bot <dlang-bot@dlang.rocks> ---
dlang/installer pull request #463 "Fixes issue 21059: installer fails when piped on Posix." was merged into stable:

- 719ebf6f472b2b2d58b56fef2aebbf530cc5bcf3 by Bastiaan Veelo:
  Fixes issue 21059.

  The assumption that $SHLVL increases when the script is run does not always
hold. $SHLVL does not increase if the script is piped into bash, thereby
failing to detect Posix. If the default terminal shell is not bash, $SHLVL
might also be 1 on Posix.

https://github.com/dlang/installer/pull/463

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