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Add nix-shell support for preserving PS1

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Fixes https://github.com/NixOS/nix/issues/1268

`nix-shell` will now preserve `PS1` if the `NIX_SHELL_PRESERVE_PROMPT`
environment variable is set.
This commit is contained in:
Gabriel Gonzalez 2020-09-04 20:05:43 -07:00
parent 8a945d6ddb
commit ee5906243a
1 changed files with 3 additions and 3 deletions
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6
src/nix-build/nix-build.cc
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@ -98,8 +98,8 @@ static void _main(int argc, char * * argv)
// List of environment variables kept for --pure
std::set<string> keepVars{
"HOME", "USER", "LOGNAME", "DISPLAY", "PATH", "TERM",
"IN_NIX_SHELL", "TZ", "PAGER", "NIX_BUILD_SHELL", "SHLVL",
"HOME", "USER", "LOGNAME", "DISPLAY", "PATH", "TERM", "IN_NIX_SHELL",
"NIX_SHELL_PRESERVE_PROMPT", "TZ", "PAGER", "NIX_BUILD_SHELL", "SHLVL",
"http_proxy", "https_proxy", "ftp_proxy", "all_proxy", "no_proxy"
};
@ -446,7 +446,7 @@ static void _main(int argc, char * * argv)
"PATH=%4%:\"$PATH\"; "
"SHELL=%5%; "
"set +e; "
R"s([ -n "$PS1" ] && PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s"
R"s([ -n "$PS1" -a -z "$NIX_SHELL_PRESERVE_PROMPT" ] && PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s"
"if [ \"$(type -t runHook)\" = function ]; then runHook shellHook; fi; "
"unset NIX_ENFORCE_PURITY; "
"shopt -u nullglob; "