--help option broken on Linux builds

[acli]

Description

The --help command-line option is broken on the current Ubuntu build

Steps to Reproduce

1. Install the build using the official instructions
2. On the command line, run brave-browser --help

Actual result:

The brave-browser script returns

 No manual entry for brave

Expected result:

The manual entry for brave-browser(1) should show. The manual page exists

Reproduces how often:

Always

Brave version (brave://version info)

Version 1.18.78 Chromium: 87.0.4280.141 (Official Build) (64-bit)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Will verify later
• Can you reproduce this issue with the nightly channel? Will verify later

Other Additional Information:

n/a

Miscellaneous Information:

n/a

[fmarier]

This switch is handled in Chrome using this code and it essentially just calls "man".

I found that all of these work:

man brave-browser-stable
man brave-browser-beta
man brave-browser

but not:

man brave

After instrumenting the code, I confirmed that binary.BaseName().value() maps to brave and so that's why the manpage can't be found.

[fmarier]

I found the root cause to be this customization we made in #4142 to the launcher/wrapper in order to work-around non-fatal crashes.

[fmarier]

It might be possible to change the value of argv[0] without using exec -a in /opt/brave.com/brave/brave-browser:

• https://stackoverflow.com/questions/24487488/how-to-change-argv0-value-in-shell-bash-script
• https://stackoverflow.com/questions/48407615/how-to-change-argv0-value-using-bash-shell
• https://unix.stackexchange.com/questions/562446/changing-argv0-from-the-command-line

[DeLuca-Agustin]

I am having the same problem but I don't understand how to fix it