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|
{ pkgs
, tools ? []
, envVars ? {}
, shell ? null
}:
with pkgs.lib;
let
mapAttrsToLines = mapping: attrs:
pkgs.lib.concatStringsSep "\n" (pkgs.lib.mapAttrsToList mapping attrs);
exportEnvVar = k: v: ''
export ${escapeShellArg k}="${v}"
'';
exportEnvVarsHook = mapAttrsToLines exportEnvVar;
fmt = rec {
codeBlock = code: text: ''"\e[${code}m"${text}"\e[0m"'';
keyword = codeBlock "1;36";
section = codeBlock "4;35";
printSectionTitle = title: ''echo -e "\n\n"${section title}"\n"'';
};
printEnvVar = k: v: ''
echo -e ${fmt.keyword (escapeShellArg "$" + k)}: ${escapeShellArg v}
'';
printEnvVarsHook = envVars: ''
${fmt.printSectionTitle "DEVSHELL ENVIRONMENT VARIABLES"}
${mapAttrsToLines printEnvVar envVars}
'';
printToolsHook = tools: ''
${fmt.printSectionTitle "DEVSHELL TOOLS"}
ls "${pkgs.symlinkJoin { name = "env"; paths = tools; }}/bin"
'';
# Use the default user shell instead of Bash
startUserShellHook = ''
$(${pkgs.finger_bsd}/bin/finger $USER \
| ${pkgs.gnugrep}/bin/grep -oP 'Shell: \K.*')
'';
in pkgs.mkShell {
packages = tools;
shellHook = ''
${exportEnvVarsHook envVars}
${optionalString (envVars != {}) (printEnvVarsHook envVars)}
${optionalString (tools != []) (printToolsHook tools)}
echo
${if (shell != null) then shell else startUserShellHook}
exit $?
'';
}
|