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Shell: Add support for getting environment variable values

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MinusGix 2019-09-08 17:41:57 -05:00 committed by Andreas Kling
parent 615d823b55
commit 2bd181a14b
Notes: sideshowbarker 2024-07-19 12:10:35 +09:00 
Author: https://github.com/MinusGix 🔰
Commit: https://github.com/SerenityOS/serenity/commit/2bd181a14bf
Pull-request: https://github.com/SerenityOS/serenity/pull/537
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bugaevc
1 changed files with 31 additions and 5 deletions
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36
Shell/main.cpp
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@ -300,16 +300,42 @@ static Vector<String> expand_globs(const StringView& path, const StringView& bas
return res;
}
static Vector<String> expand_parameters(const StringView& param)
{
bool is_variable = param.length() > 1 && param[0] == '$';
if (!is_variable)
return { param };
String variable_name = String(param.substring_view(1, param.length() - 1));
char* env_value = getenv(variable_name.characters());
if (env_value == nullptr)
return { "" };
Vector<String> res;
String str_env_value = String(env_value);
const auto& split_text = str_env_value.split_view(' ');
for (auto& part : split_text)
res.append(part);
return res;
}
static Vector<String> process_arguments(const Vector<String>& args)
{
Vector<String> argv_string;
for (auto& arg : args) {
auto expanded = expand_globs(arg, "");
if (expanded.is_empty())
argv_string.append(arg);
else
for (auto& path : expand_globs(arg, ""))
// This will return the text passed in if it wasn't a variable
// This lets us just loop over its values
auto expanded_parameters = expand_parameters(arg);
for (auto& exp_arg : expanded_parameters) {
auto expanded_globs = expand_globs(exp_arg, "");
for (auto& path : expanded_globs)
argv_string.append(path);
if (expanded_globs.is_empty())
argv_string.append(exp_arg);
}
}
return argv_string;