use std::borrow::Cow;use bstr::{BStr, BString, ByteSlice, ByteVec};/// An empty array of a type usable with the `git::easy` API to help declaring no parents should be usedpub const NO_PARENT_IDS: [git_hash::ObjectId; 0] = [];/// Produce a short commit summary for the given `message`.////// This means the following////// * Take the subject line which is delimited by two newlines (\n\n)/// * transform intermediate consecutive whitespace including \r into one space////// The resulting summary will have folded whitespace before a newline into spaces and stopped that process/// once two consecutive newlines are encountered.pub fn summary(message: &BStr) -> Cow<'_, BStr> { let message = message.trim(); match message.find_byte(b'\n') { Some(mut pos) => { let mut out = BString::default(); let mut previous_pos = None; loop { if let Some(previous_pos) = previous_pos { if previous_pos + 1 == pos { let len_after_trim = out.trim_end().len(); out.resize(len_after_trim, 0); break out.into(); } } let message_to_newline = &message[previous_pos.map(|p| p + 1).unwrap_or(0)..pos]; if let Some(pos_before_whitespace) = message_to_newline.rfind_not_byteset(b"\t\n\x0C\r ") { out.extend_from_slice(&message_to_newline[..pos_before_whitespace + 1]); } out.push_byte(b' '); previous_pos = Some(pos); match message.get(pos + 1..).and_then(|i| i.find_byte(b'\n')) { Some(next_nl_pos) => pos += next_nl_pos + 1, None => { if let Some(slice) = message.get((pos + 1)..) { out.extend_from_slice(slice); } break out.into(); } } } } None => message.as_bstr().into(), }}
use std::borrow::Cow;
use bstr::{BStr, BString, ByteSlice, ByteVec};
/// An empty array of a type usable with the `git::easy` API to help declaring no parents should be used
pub const NO_PARENT_IDS: [git_hash::ObjectId; 0] = [];
/// Produce a short commit summary for the given `message`.
///
/// This means the following
///
/// * Take the subject line which is delimited by two newlines (\n\n)
/// * transform intermediate consecutive whitespace including \r into one space
///
/// The resulting summary will have folded whitespace before a newline into spaces and stopped that process
/// once two consecutive newlines are encountered.
pub fn summary(message: &BStr) -> Cow<'_, BStr> {
let message = message.trim();
match message.find_byte(b'\n') {
Some(mut pos) => {
let mut out = BString::default();
let mut previous_pos = None;
loop {
if let Some(previous_pos) = previous_pos {
if previous_pos + 1 == pos {
let len_after_trim = out.trim_end().len();
out.resize(len_after_trim, 0);
break out.into();
}
}
let message_to_newline = &message[previous_pos.map(|p| p + 1).unwrap_or(0)..pos];
if let Some(pos_before_whitespace) = message_to_newline.rfind_not_byteset(b"\t\n\x0C\r ") {
out.extend_from_slice(&message_to_newline[..pos_before_whitespace + 1]);
}
out.push_byte(b' ');
previous_pos = Some(pos);
match message.get(pos + 1..).and_then(|i| i.find_byte(b'\n')) {
Some(next_nl_pos) => pos += next_nl_pos + 1,
None => {
if let Some(slice) = message.get((pos + 1)..) {
out.extend_from_slice(slice);
}
break out.into();
}
}
}
}
None => message.as_bstr().into(),
}
}