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Prevent --terminal-width=0 and invalid forms of --terminal-width. #559

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merged 3 commits into from
May 10, 2019
Merged

Prevent --terminal-width=0 and invalid forms of --terminal-width. #559

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61f87c0
Add validation for --terminal-width option
eth-p May 9, 2019
0a980e5
Cleaned up terminal-width validation slightly
eth-p May 10, 2019
2e1c8ab
Cleaned up terminal-width validation even more
eth-p May 10, 2019
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12 changes: 12 additions & 0 deletions src/clap_app.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -329,6 +329,18 @@ pub fn build_app(interactive_output: bool) -> ClapApp<'static, 'static> {
.takes_value(true)
.value_name("width")
.hidden_short_help(true)
.validator(
|t| {
let is_offset = t.starts_with('+') || t.starts_with('-');
t.parse::<i32>()
.map_err(|_e| "must be an offset or number")
.and_then(|v| if v == 0 && !is_offset {
Err("terminal width cannot be zero".into())
} else {
Ok(())
})
.map_err(|e| e.to_string())
})
.help(
"Explicitly set the width of the terminal instead of determining it \
automatically. If prefixed with '+' or '-', the value will be treated \
Expand Down