Function format_github_message

src/analyse.rs:813–851

Format a message for GitHub Actions workflow commands. Newlines are encoded as `%0A` per the GitHub Actions spec, and `@mentions` are wrapped in backticks to prevent GitHub from sending notifications (matching PHPStan's `GithubErrorFormatter` behaviour).

(message: &str)

/// are wrapped in backticks to prevent GitHub from sending notifications
/// (matching PHPStan's `GithubErrorFormatter` behaviour).
pub(crate) fn format_github_message(message: &str) -> String {
    let message = message.replace('\n', "%0A");
    // Wrap @mentions in backticks to prevent GitHub notifications.
    let mut result = String::with_capacity(message.len());
    let mut chars = message.char_indices().peekable();
    let mut last_end = 0;
    while let Some((i, c)) = chars.next() {
        if c == '@' {
            let before_is_space = i == 0
                || message
                    .as_bytes()
                    .get(i - 1)
                    .is_none_or(|b| b.is_ascii_whitespace());
            if before_is_space {
                // Collect the mention: @[a-zA-Z0-9_-]+
                let start = i + 1;
                let mut end = start;
                while let Some(&(j, nc)) = chars.peek() {
                    if nc.is_ascii_alphanumeric() || nc == '_' || nc == '-' {
                        end = j + nc.len_utf8();
                        chars.next();
                    } else {
                        break;
                    }
                }
                if end > start {
                    result.push_str(&message[last_end..i]);
                    result.push('`');
                    result.push_str(&message[i..end]);
                    result.push('`');
                    last_end = end;
                    continue;
                }
            }
        }
    }
    result.push_str(&message[last_end..]);
    result
}

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