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use ansi_term::Color;
use unicode_segmentation::UnicodeSegmentation;
use super::{Context, Module};
/// Creates a module with the Git branch in the current directory
///
/// Will display the branch name if the current directory is a git repo
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
const GIT_BRANCH_CHAR: &str = " ";
let segment_color = Color::Purple.bold();
let mut module = context.new_module("git_branch")?;
module.set_style(segment_color);
module.get_prefix().set_value("on ");
let unsafe_truncation_length = module
.config_value_i64("truncation_length")
.unwrap_or(std::i64::MAX);
let truncation_symbol = get_graphemes(
module.config_value_str("truncation_symbol").unwrap_or("…"),
1,
);
module.new_segment("symbol", GIT_BRANCH_CHAR);
// TODO: Once error handling is implemented, warn the user if their config
// truncation length is nonsensical
let len = if unsafe_truncation_length <= 0 {
log::debug!(
"[WARN]: \"truncation_length\" should be a positive value, found {}",
unsafe_truncation_length
);
std::usize::MAX
} else {
unsafe_truncation_length as usize
};
let branch_name = context.branch_name.as_ref()?;
let truncated_graphemes = get_graphemes(&branch_name, len);
// The truncation symbol should only be added if we truncated
let truncated_and_symbol = if len < graphemes_len(&branch_name) {
truncated_graphemes + &truncation_symbol
} else {
truncated_graphemes
};
module.new_segment("name", &truncated_and_symbol);
Some(module)
}
fn get_graphemes(text: &str, length: usize) -> String {
UnicodeSegmentation::graphemes(text, true)
.take(length)
.collect::<Vec<&str>>()
.concat()
}
fn graphemes_len(text: &str) -> usize {
UnicodeSegmentation::graphemes(&text[..], true).count()
}
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