anvilsign in

collin/anvil

1f463de586fbfeb46c9a7f1d5a63230df5b3f3a7 / vendor / gitserver-core / src / pack.rs
1use std::collections::HashSet;
2use std::path::Path;
3
4use bytes::Bytes;
5use sha1::{
6 Digest,
7 Sha1,
8};
9use tokio::io::AsyncRead;
10use tokio_util::io::StreamReader;
11
12use crate::error::{
13 Error,
14 Result,
15};
16use crate::pktline;
17
18#[derive(Clone, Debug, Default)]
19pub struct UploadPackCapabilities {
20 pub ofs_delta: bool,
21 pub multi_ack: bool,
22 pub multi_ack_detailed: bool,
23}
24
25#[derive(Clone, Debug, Default)]
26pub struct ShallowRequest {
27 pub depth: Option<usize>,
28 pub client_shallows: Vec<gix::ObjectId>,
29 pub deepen_relative: bool,
30}
31
32/// A parsed upload-pack request from a Git client.
33pub struct UploadPackRequest {
34 pub wants: Vec<gix::ObjectId>,
35 pub haves: Vec<gix::ObjectId>,
36 pub done: bool,
37 pub capabilities: UploadPackCapabilities,
38 pub shallow: ShallowRequest,
39 pub object_ids: Option<Vec<gix::ObjectId>>,
40}
41
42impl UploadPackRequest {
43 /// Parse a pkt-line encoded upload-pack request body.
44 ///
45 /// The body contains:
46 /// - "want <oid> [capabilities]\n" lines
47 /// - flush packet "0000"
48 /// - "have <oid>\n" lines (optional)
49 /// - "done\n"
50 pub fn parse(body: &[u8]) -> Result<Self> {
51 let mut wants = Vec::new();
52 let mut haves = Vec::new();
53 let mut done = false;
54 let mut capabilities = UploadPackCapabilities::default();
55 let mut shallow = ShallowRequest::default();
56 let mut pos = 0;
57
58 while pos < body.len() {
59 // Check for flush packet
60 if body[pos..].starts_with(b"0000") {
61 pos += 4;
62 continue;
63 }
64
65 // Read 4-byte hex length prefix
66 if pos + 4 > body.len() {
67 break;
68 }
69 let len_str = std::str::from_utf8(&body[pos..pos + 4])
70 .map_err(|_| Error::Protocol("invalid pkt-line length prefix".into()))?;
71 let len = usize::from_str_radix(len_str, 16)
72 .map_err(|_| Error::Protocol("invalid pkt-line length".into()))?;
73
74 if len == 0 {
75 // flush packet already handled above, but just in case
76 pos += 4;
77 continue;
78 }
79
80 if len < 4 || pos + len > body.len() {
81 break;
82 }
83
84 let payload = &body[pos + 4..pos + len];
85 let line = std::str::from_utf8(payload)
86 .map_err(|_| Error::Protocol("invalid UTF-8 in pkt-line".into()))?;
87 let line = line.trim_end_matches('\n');
88
89 if line == "done" {
90 done = true;
91 } else if let Some(rest) = line.strip_prefix("deepen ") {
92 let depth = rest
93 .parse::<usize>()
94 .map_err(|_| Error::Protocol(format!("invalid deepen value: {rest}")))?;
95 shallow.depth = Some(depth);
96 } else if line == "deepen-relative" {
97 shallow.deepen_relative = true;
98 } else if let Some(rest) = line.strip_prefix("shallow ") {
99 let oid = gix::ObjectId::from_hex(rest.as_bytes())
100 .map_err(|_| Error::Protocol(format!("invalid OID in shallow: {rest}")))?;
101 shallow.client_shallows.push(oid);
102 } else if let Some(rest) = line.strip_prefix("want ") {
103 let mut parts = rest.split_ascii_whitespace();
104 let oid_hex = parts
105 .next()
106 .ok_or_else(|| Error::Protocol("missing OID in want".into()))?;
107 let oid = gix::ObjectId::from_hex(oid_hex.as_bytes())
108 .map_err(|_| Error::Protocol(format!("invalid OID in want: {oid_hex}")))?;
109 if wants.is_empty() {
110 for capability in parts {
111 if capability == "ofs-delta" {
112 capabilities.ofs_delta = true;
113 } else if capability == "multi_ack" {
114 capabilities.multi_ack = true;
115 } else if capability == "multi_ack_detailed" {
116 capabilities.multi_ack = true;
117 capabilities.multi_ack_detailed = true;
118 }
119 }
120 }
121 wants.push(oid);
122 } else if let Some(rest) = line.strip_prefix("have ") {
123 let oid_hex = rest
124 .split_ascii_whitespace()
125 .next()
126 .ok_or_else(|| Error::Protocol("missing OID in have".into()))?;
127 let oid = gix::ObjectId::from_hex(oid_hex.as_bytes())
128 .map_err(|_| Error::Protocol(format!("invalid OID in have: {oid_hex}")))?;
129 haves.push(oid);
130 }
131
132 pos += len;
133 }
134
135 Ok(Self {
136 wants,
137 haves,
138 done,
139 capabilities,
140 shallow,
141 object_ids: None,
142 })
143 }
144}
145
146/// Encode the variable-length pack object header.
147///
148/// Format: first byte = MSB continuation + 3-bit type + 4-bit size
149/// Subsequent bytes: 7-bit size chunks with MSB continuation
150fn encode_pack_object_header(obj_type: u8, size: usize) -> Vec<u8> {
151 let mut header = Vec::new();
152 let mut byte = (obj_type << 4) | (size as u8 & 0x0f);
153 let mut remaining = size >> 4;
154
155 if remaining > 0 {
156 byte |= 0x80; // set continuation bit
157 header.push(byte);
158 while remaining > 0 {
159 byte = remaining as u8 & 0x7f;
160 remaining >>= 7;
161 if remaining > 0 {
162 byte |= 0x80;
163 }
164 header.push(byte);
165 }
166 } else {
167 header.push(byte);
168 }
169
170 header
171}
172
173fn encode_ofs_delta_base_distance(mut distance: u64) -> Vec<u8> {
174 debug_assert!(distance > 0, "offset deltas must point backwards");
175
176 let mut buf = [0u8; 10];
177 let mut bytes_written = 1;
178 buf[buf.len() - 1] = distance as u8 & 0x7f;
179
180 for out in buf.iter_mut().rev().skip(1) {
181 distance >>= 7;
182 if distance == 0 {
183 break;
184 }
185 distance -= 1;
186 *out = 0x80 | (distance as u8 & 0x7f);
187 bytes_written += 1;
188 }
189
190 buf[buf.len() - bytes_written..].to_vec()
191}
192
193fn encode_delta_size(mut size: usize, out: &mut Vec<u8>) {
194 loop {
195 let mut byte = (size & 0x7f) as u8;
196 size >>= 7;
197 if size > 0 {
198 byte |= 0x80;
199 }
200 out.push(byte);
201 if size == 0 {
202 break;
203 }
204 }
205}
206
207fn encode_delta_copy_instruction(out: &mut Vec<u8>, offset: usize, size: usize) {
208 debug_assert!(size > 0 && size <= 0x10000);
209
210 let command_pos = out.len();
211 out.push(0x80);
212 let mut command = 0x80;
213
214 if offset & 0xff != 0 {
215 command |= 0x01;
216 out.push(offset as u8);
217 }
218 if (offset >> 8) & 0xff != 0 {
219 command |= 0x02;
220 out.push((offset >> 8) as u8);
221 }
222 if (offset >> 16) & 0xff != 0 {
223 command |= 0x04;
224 out.push((offset >> 16) as u8);
225 }
226 if (offset >> 24) & 0xff != 0 {
227 command |= 0x08;
228 out.push((offset >> 24) as u8);
229 }
230
231 if size != 0x10000 {
232 if size & 0xff != 0 {
233 command |= 0x10;
234 out.push(size as u8);
235 }
236 if (size >> 8) & 0xff != 0 {
237 command |= 0x20;
238 out.push((size >> 8) as u8);
239 }
240 if (size >> 16) & 0xff != 0 {
241 command |= 0x40;
242 out.push((size >> 16) as u8);
243 }
244 }
245
246 out[command_pos] = command;
247}
248
249fn encode_delta_copy(out: &mut Vec<u8>, mut offset: usize, mut size: usize) {
250 while size > 0 {
251 let chunk = size.min(0x10000);
252 encode_delta_copy_instruction(out, offset, chunk);
253 offset += chunk;
254 size -= chunk;
255 }
256}
257
258fn encode_delta_insert(out: &mut Vec<u8>, data: &[u8]) {
259 for chunk in data.chunks(0x7f) {
260 out.push(chunk.len() as u8);
261 out.extend_from_slice(chunk);
262 }
263}
264
265fn encode_blob_delta(base: &[u8], target: &[u8]) -> Option<Vec<u8>> {
266 let mut prefix = 0;
267 let max_prefix = base.len().min(target.len());
268 while prefix < max_prefix && base[prefix] == target[prefix] {
269 prefix += 1;
270 }
271
272 let max_suffix = base
273 .len()
274 .saturating_sub(prefix)
275 .min(target.len().saturating_sub(prefix));
276 let mut suffix = 0;
277 while suffix < max_suffix && base[base.len() - 1 - suffix] == target[target.len() - 1 - suffix]
278 {
279 suffix += 1;
280 }
281
282 if prefix == 0 && suffix == 0 {
283 return None;
284 }
285
286 let mut delta = Vec::new();
287 encode_delta_size(base.len(), &mut delta);
288 encode_delta_size(target.len(), &mut delta);
289
290 if prefix > 0 {
291 encode_delta_copy(&mut delta, 0, prefix);
292 }
293
294 let insert_start = prefix;
295 let insert_end = target.len() - suffix;
296 encode_delta_insert(&mut delta, &target[insert_start..insert_end]);
297
298 if suffix > 0 {
299 encode_delta_copy(&mut delta, base.len() - suffix, suffix);
300 }
301
302 Some(delta)
303}
304
305fn build_base_entry(kind: gix::object::Kind, data: &[u8]) -> Vec<u8> {
306 let type_num = object_type_number(kind);
307 let obj_header = encode_pack_object_header(type_num, data.len());
308 let compressed = miniz_oxide::deflate::compress_to_vec_zlib(data, 6);
309
310 let mut entry = Vec::with_capacity(obj_header.len() + compressed.len());
311 entry.extend_from_slice(&obj_header);
312 entry.extend_from_slice(&compressed);
313 entry
314}
315
316fn build_ofs_delta_entry(
317 pack_offset: u64,
318 base_pack_offset: u64,
319 base_data: &[u8],
320 target_data: &[u8],
321) -> Option<Vec<u8>> {
322 let delta = encode_blob_delta(base_data, target_data)?;
323 let obj_header = encode_pack_object_header(6, delta.len());
324 let base_distance = encode_ofs_delta_base_distance(pack_offset - base_pack_offset);
325 let compressed = miniz_oxide::deflate::compress_to_vec_zlib(&delta, 6);
326
327 let mut entry = Vec::with_capacity(obj_header.len() + base_distance.len() + compressed.len());
328 entry.extend_from_slice(&obj_header);
329 entry.extend_from_slice(&base_distance);
330 entry.extend_from_slice(&compressed);
331 Some(entry)
332}
333
334struct BlobDeltaBase {
335 pack_offset: u64,
336 data: Vec<u8>,
337}
338
339/// Map gix object kind to pack type number.
340fn object_type_number(kind: gix::object::Kind) -> u8 {
341 match kind {
342 gix::object::Kind::Commit => 1,
343 gix::object::Kind::Tree => 2,
344 gix::object::Kind::Blob => 3,
345 gix::object::Kind::Tag => 4,
346 }
347}
348
349/// Send raw bytes through the channel.
350fn send(
351 tx: &tokio::sync::mpsc::Sender<std::result::Result<Bytes, std::io::Error>>,
352 data: &[u8],
353) -> std::result::Result<(), Box<dyn std::error::Error + Send + Sync>> {
354 tx.blocking_send(Ok(Bytes::copy_from_slice(data)))
355 .map_err(|_| "receiver dropped".into())
356}
357
358/// Send pack data through the channel wrapped in side-band-64k framing
359/// (band 1 = pack data).
360///
361/// Respects LARGE_PACKET_MAX: each pkt-line frame carries at most
362/// 65520 - 4 (prefix) - 1 (band byte) = 65515 bytes of payload.
363fn send_sideband(
364 tx: &tokio::sync::mpsc::Sender<std::result::Result<Bytes, std::io::Error>>,
365 data: &[u8],
366) -> std::result::Result<(), Box<dyn std::error::Error + Send + Sync>> {
367 const MAX_DATA_PER_FRAME: usize = 65515;
368
369 for chunk in data.chunks(MAX_DATA_PER_FRAME) {
370 let pkt_len = 4 + 1 + chunk.len();
371 let mut frame = Vec::with_capacity(pkt_len);
372 frame.extend_from_slice(format!("{pkt_len:04x}").as_bytes());
373 frame.push(0x01); // band 1 = pack data
374 frame.extend_from_slice(chunk);
375 send(tx, &frame)?;
376 }
377
378 Ok(())
379}
380
381fn encode_ack_line(oid: gix::ObjectId, suffix: Option<&str>) -> Vec<u8> {
382 let mut line = format!("ACK {oid}");
383 if let Some(suffix) = suffix {
384 line.push(' ');
385 line.push_str(suffix);
386 }
387 line.push('\n');
388 pktline::encode(line.as_bytes())
389}
390
391/// Recursively collect tree and blob OIDs reachable from `tree_oid`.
392///
393/// Uses a single `find_object` call per object and parses raw tree
394/// bytes via `TreeRefIter` to avoid a second ODB lookup.
395fn collect_tree_oids(
396 repo: &gix::Repository,
397 tree_oid: gix::ObjectId,
398 seen: &mut HashSet<gix::ObjectId>,
399 oids: &mut Vec<gix::ObjectId>,
400) -> std::result::Result<(), Box<dyn std::error::Error + Send + Sync>> {
401 if !seen.insert(tree_oid) {
402 return Ok(());
403 }
404
405 let tree_obj = repo.find_object(tree_oid)?;
406 let tree_data = tree_obj.data.to_vec();
407 oids.push(tree_oid);
408
409 for entry_result in gix::objs::TreeRefIter::from_bytes(&tree_data, gix::hash::Kind::Sha1) {
410 let entry = entry_result?;
411 let entry_oid = entry.oid.to_owned();
412 let entry_mode = entry.mode;
413
414 if entry_mode.is_tree() {
415 collect_tree_oids(repo, entry_oid, seen, oids)?;
416 } else if seen.insert(entry_oid) && !entry_mode.is_commit() {
417 oids.push(entry_oid);
418 }
419 }
420
421 Ok(())
422}
423
424/// Walk commits from `wants` (excluding `haves`) and collect all
425/// reachable ObjectIds (commits, trees, blobs).
426///
427/// Pass 1 of the two-pass streaming approach: only OIDs are stored,
428/// not object data.
429fn collect_all_oids(
430 repo: &gix::Repository,
431 wants: &[gix::ObjectId],
432 haves: &[gix::ObjectId],
433) -> std::result::Result<Vec<gix::ObjectId>, Box<dyn std::error::Error + Send + Sync>> {
434 let have_set: HashSet<gix::ObjectId> = haves.iter().copied().collect();
435 let mut seen = HashSet::new();
436 let mut oids = Vec::new();
437
438 // Mark have objects as already seen so we skip them
439 for have in haves {
440 seen.insert(*have);
441 }
442
443 let walk = repo
444 .rev_walk(wants.iter().copied())
445 .with_hidden(haves.iter().copied())
446 .all()?;
447
448 for info_result in walk {
449 let info = info_result?;
450 let commit_oid = info.id;
451
452 if have_set.contains(&commit_oid) || !seen.insert(commit_oid) {
453 continue;
454 }
455
456 // Extract tree OID from raw commit bytes (single ODB read)
457 let commit_obj = repo.find_object(commit_oid)?;
458 let tree_oid =
459 gix::objs::CommitRefIter::from_bytes(&commit_obj.data, gix::hash::Kind::Sha1)
460 .tree_id()?;
461
462 oids.push(commit_oid);
463
464 collect_tree_oids(repo, tree_oid, &mut seen, &mut oids)?;
465 }
466
467 Ok(oids)
468}
469
470fn common_haves(
471 repo: &gix::Repository,
472 wants: &[gix::ObjectId],
473 haves: &[gix::ObjectId],
474) -> std::result::Result<Vec<gix::ObjectId>, Box<dyn std::error::Error + Send + Sync>> {
475 let want_set: HashSet<gix::ObjectId> =
476 collect_all_oids(repo, wants, &[])?.into_iter().collect();
477
478 Ok(haves
479 .iter()
480 .copied()
481 .filter(|oid| want_set.contains(oid))
482 .collect())
483}
484
485/// Generate the complete pack response for a Git upload-pack request.
486///
487/// Returns an `AsyncRead` producing the side-band-64k framed response that
488/// can be streamed as the HTTP response body.
489pub fn generate_pack(
490 repo_path: &Path,
491 request: &UploadPackRequest,
492) -> Result<impl AsyncRead + Send + Unpin + use<>> {
493 let repo_path = repo_path.to_path_buf();
494 let wants: Vec<gix::ObjectId> = request.wants.clone();
495 let haves: Vec<gix::ObjectId> = request.haves.clone();
496 let object_ids = request.object_ids.clone();
497 let done = request.done;
498 let ofs_delta = request.capabilities.ofs_delta;
499 let multi_ack = request.capabilities.multi_ack;
500 let multi_ack_detailed = request.capabilities.multi_ack_detailed;
501
502 let (tx, rx) = tokio::sync::mpsc::channel::<std::result::Result<Bytes, std::io::Error>>(64);
503
504 let handle = tokio::task::spawn_blocking(move || {
505 if let Err(e) = generate_pack_sync(
506 &repo_path,
507 &wants,
508 &haves,
509 object_ids,
510 GeneratePackOptions {
511 done,
512 ofs_delta,
513 multi_ack,
514 multi_ack_detailed,
515 },
516 &tx,
517 ) {
518 let _ = tx.blocking_send(Err(std::io::Error::other(e.to_string())));
519 }
520 });
521
522 // Log panics from the blocking task without blocking the stream
523 tokio::spawn(async move {
524 if let Err(e) = handle.await {
525 tracing::error!("pack generation task panicked: {e}");
526 }
527 });
528
529 let stream = tokio_stream::wrappers::ReceiverStream::new(rx);
530 Ok(StreamReader::new(stream))
531}
532
533/// Synchronous two-pass streaming pack generator.
534///
535/// Pass 1: collect OIDs only (lightweight -- no object data retained).
536/// Pass 2: re-read each object, compress, and stream it through `tx`.
537struct GeneratePackOptions {
538 done: bool,
539 ofs_delta: bool,
540 multi_ack: bool,
541 multi_ack_detailed: bool,
542}
543
544fn generate_pack_sync(
545 repo_path: &Path,
546 wants: &[gix::ObjectId],
547 haves: &[gix::ObjectId],
548 object_ids: Option<Vec<gix::ObjectId>>,
549 options: GeneratePackOptions,
550 tx: &tokio::sync::mpsc::Sender<std::result::Result<Bytes, std::io::Error>>,
551) -> std::result::Result<(), Box<dyn std::error::Error + Send + Sync>> {
552 const MAX_DELTA_BASES: usize = 8;
553 const MIN_DELTA_BLOB_SIZE: usize = 1024;
554
555 let repo = gix::open(repo_path)?;
556
557 let common = if !haves.is_empty() {
558 common_haves(&repo, wants, haves)?
559 } else {
560 Vec::new()
561 };
562
563 if options.multi_ack && !haves.is_empty() && !options.done {
564 for oid in &common {
565 let suffix = if options.multi_ack_detailed {
566 "common"
567 } else {
568 "continue"
569 };
570 send(tx, &encode_ack_line(*oid, Some(suffix)))?;
571 }
572 send(tx, &pktline::encode(b"NAK\n"))?;
573 return Ok(());
574 }
575
576 if options.multi_ack && !common.is_empty() {
577 send(tx, &encode_ack_line(*common.last().unwrap(), None))?;
578 } else {
579 // NAK line
580 send(tx, &pktline::encode(b"NAK\n"))?;
581 }
582
583 // Pass 1: collect OIDs only
584 let oids = match object_ids {
585 Some(oids) => oids,
586 None => collect_all_oids(&repo, wants, haves)?,
587 };
588
589 // Pass 2: stream each object
590 let mut hasher = Sha1::new();
591
592 // Pack header
593 let mut header = Vec::with_capacity(12);
594 header.extend_from_slice(b"PACK");
595 header.extend_from_slice(&2u32.to_be_bytes());
596 header.extend_from_slice(&(oids.len() as u32).to_be_bytes());
597 hasher.update(&header);
598 send_sideband(tx, &header)?;
599
600 let mut pack_offset = header.len() as u64;
601 let mut recent_blob_bases = Vec::<BlobDeltaBase>::new();
602
603 // Each object: read, compress, frame, send
604 for oid in &oids {
605 let obj = repo.find_object(*oid)?;
606 let full_entry = build_base_entry(obj.kind, &obj.data);
607 let mut used_delta = false;
608 let entry = if options.ofs_delta
609 && obj.kind == gix::object::Kind::Blob
610 && obj.data.len() >= MIN_DELTA_BLOB_SIZE
611 {
612 recent_blob_bases
613 .iter()
614 .filter(|base| base.data.len() >= MIN_DELTA_BLOB_SIZE)
615 .filter_map(|base| {
616 build_ofs_delta_entry(pack_offset, base.pack_offset, &base.data, &obj.data)
617 })
618 .min_by_key(Vec::len)
619 .filter(|delta_entry| delta_entry.len() < full_entry.len())
620 .inspect(|_| {
621 used_delta = true;
622 })
623 .unwrap_or(full_entry)
624 } else {
625 full_entry
626 };
627
628 hasher.update(&entry);
629 send_sideband(tx, &entry)?;
630
631 if obj.kind == gix::object::Kind::Blob
632 && !used_delta
633 && obj.data.len() >= MIN_DELTA_BLOB_SIZE
634 {
635 recent_blob_bases.push(BlobDeltaBase {
636 pack_offset,
637 data: obj.data.to_vec(),
638 });
639 if recent_blob_bases.len() > MAX_DELTA_BASES {
640 recent_blob_bases.remove(0);
641 }
642 }
643
644 pack_offset += entry.len() as u64;
645 }
646
647 // SHA-1 checksum over raw pack bytes
648 let checksum = hasher.finalize();
649 send_sideband(tx, &checksum)?;
650
651 // Flush
652 send(tx, b"0000")?;
653
654 Ok(())
655}
656
657#[cfg(test)]
658mod tests {
659 use std::path::{
660 Path,
661 PathBuf,
662 };
663 use std::process::Command;
664
665 use tempfile::TempDir;
666 use tokio::io::AsyncReadExt;
667
668 use super::*;
669
670 fn make_pktline(data: &str) -> Vec<u8> {
671 let len = data.len() + 4;
672 format!("{len:04x}{data}").into_bytes()
673 }
674
675 /// Create a bare repo with a single commit on the `main` branch.
676 fn create_repo_with_commit(root: &Path) -> PathBuf {
677 let bare_path = root.join("test.git");
678 let clone_path = root.join("workdir");
679
680 let out = Command::new("git")
681 .args(["init", "--bare", bare_path.to_str().unwrap()])
682 .output()
683 .expect("git init --bare failed");
684 assert!(out.status.success(), "git init --bare failed: {:?}", out);
685
686 let out = Command::new("git")
687 .args(["symbolic-ref", "HEAD", "refs/heads/main"])
688 .current_dir(&bare_path)
689 .output()
690 .expect("git symbolic-ref failed");
691 assert!(out.status.success());
692
693 let out = Command::new("git")
694 .args([
695 "clone",
696 bare_path.to_str().unwrap(),
697 clone_path.to_str().unwrap(),
698 ])
699 .output()
700 .expect("git clone failed");
701 assert!(out.status.success(), "git clone failed: {:?}", out);
702
703 for (key, val) in [("user.name", "Test User"), ("user.email", "test@test.com")] {
704 Command::new("git")
705 .args(["config", key, val])
706 .current_dir(&clone_path)
707 .output()
708 .expect("git config failed");
709 }
710
711 // Create a file and commit
712 std::fs::write(clone_path.join("README.md"), "# Test\n").unwrap();
713
714 Command::new("git")
715 .args(["add", "README.md"])
716 .current_dir(&clone_path)
717 .output()
718 .expect("git add failed");
719
720 let out = Command::new("git")
721 .args(["commit", "-m", "initial commit"])
722 .current_dir(&clone_path)
723 .env("GIT_AUTHOR_NAME", "Test User")
724 .env("GIT_AUTHOR_EMAIL", "test@test.com")
725 .env("GIT_COMMITTER_NAME", "Test User")
726 .env("GIT_COMMITTER_EMAIL", "test@test.com")
727 .output()
728 .expect("git commit failed");
729 assert!(out.status.success(), "git commit failed: {:?}", out);
730
731 let out = Command::new("git")
732 .args(["push", "origin", "main"])
733 .current_dir(&clone_path)
734 .output()
735 .expect("git push failed");
736 assert!(out.status.success(), "git push failed: {:?}", out);
737
738 bare_path
739 }
740
741 #[test]
742 fn parse_simple_want() {
743 let hash = "0000000000000000000000000000000000000001";
744 let mut body = make_pktline(&format!("want {hash}\n"));
745 body.extend_from_slice(b"00000009done\n");
746 let req = UploadPackRequest::parse(&body).unwrap();
747 assert_eq!(req.wants.len(), 1);
748 assert!(req.haves.is_empty());
749 assert!(req.done);
750 assert!(!req.capabilities.ofs_delta);
751 assert_eq!(req.shallow.depth, None);
752 }
753
754 #[test]
755 fn parse_wants_and_haves() {
756 let want = "0000000000000000000000000000000000000001";
757 let have = "0000000000000000000000000000000000000002";
758 let mut body = make_pktline(&format!("want {want}\n"));
759 body.extend_from_slice(b"0000");
760 body.extend_from_slice(&make_pktline(&format!("have {have}\n")));
761 body.extend_from_slice(b"0009done\n");
762 let req = UploadPackRequest::parse(&body).unwrap();
763 assert_eq!(req.wants.len(), 1);
764 assert_eq!(req.haves.len(), 1);
765 assert!(req.done);
766 assert!(!req.capabilities.ofs_delta);
767 assert!(req.shallow.client_shallows.is_empty());
768 }
769
770 #[test]
771 fn parse_ofs_delta_capability() {
772 let hash = "0000000000000000000000000000000000000001";
773 let mut body = make_pktline(&format!("want {hash} side-band-64k ofs-delta\n"));
774 body.extend_from_slice(b"0009done\n");
775 let req = UploadPackRequest::parse(&body).unwrap();
776 assert!(req.capabilities.ofs_delta);
777 }
778
779 #[test]
780 fn parse_multi_ack_capability() {
781 let hash = "0000000000000000000000000000000000000001";
782 let mut body = make_pktline(&format!("want {hash} multi_ack side-band-64k\n"));
783 body.extend_from_slice(b"0009done\n");
784 let req = UploadPackRequest::parse(&body).unwrap();
785 assert!(req.capabilities.multi_ack);
786 }
787
788 #[test]
789 fn parse_multi_ack_detailed_capability() {
790 let hash = "0000000000000000000000000000000000000001";
791 let mut body = make_pktline(&format!("want {hash} multi_ack_detailed side-band-64k\n"));
792 body.extend_from_slice(b"0009done\n");
793 let req = UploadPackRequest::parse(&body).unwrap();
794 assert!(req.capabilities.multi_ack);
795 assert!(req.capabilities.multi_ack_detailed);
796 }
797
798 #[test]
799 fn parse_shallow_request() {
800 let hash = "0000000000000000000000000000000000000001";
801 let mut body = make_pktline(&format!("want {hash}\n"));
802 body.extend_from_slice(&make_pktline("deepen 2\n"));
803 body.extend_from_slice(&make_pktline(&format!("shallow {hash}\n")));
804 body.extend_from_slice(&make_pktline("deepen-relative\n"));
805 body.extend_from_slice(b"0009done\n");
806 let req = UploadPackRequest::parse(&body).unwrap();
807 assert_eq!(req.shallow.depth, Some(2));
808 assert_eq!(
809 req.shallow.client_shallows,
810 vec![gix::ObjectId::from_hex(hash.as_bytes()).unwrap()]
811 );
812 assert!(req.shallow.deepen_relative);
813 }
814
815 #[tokio::test]
816 async fn generate_pack_for_clone() {
817 let dir = TempDir::new().unwrap();
818 let repo_path = create_repo_with_commit(dir.path());
819
820 // Get HEAD OID
821 let repo = gix::open(&repo_path).unwrap();
822 let head_oid = repo.head_id().unwrap().detach();
823 drop(repo);
824
825 let request = UploadPackRequest {
826 wants: vec![head_oid],
827 haves: vec![],
828 done: true,
829 capabilities: UploadPackCapabilities::default(),
830 shallow: ShallowRequest::default(),
831 object_ids: None,
832 };
833
834 let mut reader = generate_pack(&repo_path, &request).unwrap();
835 let mut buf = Vec::new();
836 reader.read_to_end(&mut buf).await.unwrap();
837
838 let response = String::from_utf8_lossy(&buf);
839 assert!(
840 response.contains("NAK"),
841 "response should contain NAK: {response:?}"
842 );
843
844 // Find PACK signature in the binary response
845 let pack_found = buf.windows(4).any(|window| window == b"PACK");
846 assert!(pack_found, "response should contain PACK signature");
847 }
848}