1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
use super::{
downloader::{http_get, write_bytes},
includes::{parse_includes, resolve_include},
provider::{FetchResult, Provider, RepoRef},
};
use std::{
collections::{HashSet, VecDeque},
fs,
path::{Path, PathBuf},
};
use url::Url;
pub struct GitHub;
impl GitHub {
fn raw_url(r: &RepoRef, repo_rel: &str) -> String {
format!(
"https://raw.githubusercontent.com/{}/{}/{}/{}",
r.owner, r.repo, r.branch, repo_rel
)
}
// fn try_entry(r: &RepoRef, out: &Path, repo_rel: &str) -> Option<PathBuf> {
// let url = Self::raw_url(r, repo_rel);
// if let Ok(bytes) = http_get(&url) {
// let local = out.join(repo_rel);
// if write_bytes(&local, &bytes).is_ok() { return Some(local); }
// }
// None
// }
// fn branch_candidates(branch: &str) -> Vec<String> {
// if branch != "HEAD" { return vec![branch.to_string()]; }
// vec!["main".into(), "master".into(), "trunk".into()]
// }
fn fetch_file(
r: &RepoRef,
out_root: &Path,
repo_rel: &str,
) -> Result<PathBuf, Box<dyn std::error::Error>> {
let url = Self::raw_url(r, repo_rel);
let bytes = http_get(&url)?;
let local = out_root.join(repo_rel);
// Check for HTML/404 response
let is_html = bytes.starts_with(b"<!doctype html") || bytes.starts_with(b"<html");
if is_html {
let _ = std::fs::remove_file(&local);
return Err(format!("GitHub: Got HTML/404 for {}", url).into());
}
if let Some(p) = local.parent() {
fs::create_dir_all(p)?;
}
write_bytes(&local, &bytes)?;
Ok(local)
}
}
impl Provider for GitHub {
fn parse_url(&self, url: &str) -> Option<RepoRef> {
let u = Url::parse(url).ok()?;
if u.domain()? != "github.com" {
return None;
}
let segs = u.path_segments()?.collect::<Vec<_>>();
if segs.len() < 2 {
return None;
}
let owner = segs[0].to_string();
let repo = segs[1].trim_end_matches(".git").to_string();
if segs.len() == 2 {
return Some(RepoRef {
host: "github.com".into(),
owner,
repo,
branch: "HEAD".into(),
path: None,
});
}
// Accept GitHub views: blob/tree/raw/blame
match segs[2] {
"blob" | "tree" | "raw" | "blame" if segs.len() >= 4 => {
// <view>/<ref>/<path...> where <ref> can be a branch name or a commit SHA
let branch = segs[3].to_string();
let path = if segs.len() > 4 {
Some(segs[4..].join("/"))
} else {
None
};
Some(RepoRef {
host: "github.com".into(),
owner,
repo,
branch,
path,
})
}
_ => {
// Fallback: treat remainder as repo path with unknown ref
let path = if segs.len() > 2 {
Some(segs[2..].join("/"))
} else {
None
};
Some(RepoRef {
host: "github.com".into(),
owner,
repo,
branch: "HEAD".into(),
path,
})
}
}
}
fn fetch_tal_tree(
&self,
r: &RepoRef,
out_root: &Path,
) -> Result<FetchResult, Box<dyn std::error::Error>> {
let entry_rel = match &r.path {
Some(p)
if p.to_ascii_lowercase().ends_with(".tal")
|| p.to_ascii_lowercase().ends_with(".rom")
|| p.to_ascii_lowercase().ends_with(".rom.txt")
|| p.to_ascii_lowercase().ends_with(".orca") =>
{
p.replace('\\', "/")
}
_ => return Err(
"github: URL must point to a .tal, .rom, .rom.txt, or .orca file; not guessing entries"
.into(),
),
};
// Check cache for entry file first
let entry_local = out_root.join(&entry_rel);
if entry_local.exists() {
eprintln!("[GitHub] Using cached file: {}", entry_local.display());
return Ok(FetchResult {
entry_local: entry_local.clone(),
all_files: vec![entry_local],
});
}
let entry_local = Self::fetch_file(r, out_root, &entry_rel)?;
let mut all = vec![entry_local.clone()];
// Recursively fetch includes for .tal files
if entry_rel.to_ascii_lowercase().ends_with(".tal") {
let mut visited: HashSet<String> = [entry_rel.clone()].into_iter().collect();
let mut q: VecDeque<(String, PathBuf)> =
VecDeque::from([(entry_rel.clone(), entry_local.clone())]);
let entry_dir = Path::new(&entry_rel)
.parent()
.map(|p| p.to_string_lossy().replace('\\', "/"))
.unwrap_or_default();
while let Some((curr_rel, curr_local)) = q.pop_front() {
let src = fs::read_to_string(&curr_local).unwrap_or_default();
for inc in parse_includes(&src) {
let target = resolve_include(&curr_rel, &inc);
if !visited.insert(target.clone()) {
continue;
}
let mut attempts: Vec<(String, Option<std::path::PathBuf>)> = Vec::new();
let mut success = None;
let mut errors = vec![];
// First attempt: entry_dir + target, unless target already starts with entry_dir
let first_attempt = if !entry_dir.is_empty() && !target.starts_with(&entry_dir)
{
format!("{}/{}", entry_dir, target)
} else {
target.clone()
};
attempts.push((first_attempt.clone(), None));
match Self::fetch_file(r, out_root, &first_attempt) {
Ok(loc) => {
success = Some((first_attempt.clone(), loc));
}
Err(e) => {
errors.push((first_attempt.clone(), format!("{}", e)));
}
}
// Fallback 1: deduped path
if success.is_none() {
let parts: Vec<&str> = target.split('/').collect();
if parts.len() >= 3 && parts[0] == parts[1] {
let deduped = parts[1..].join("/");
attempts.push((deduped.clone(), None));
match Self::fetch_file(r, out_root, &deduped) {
Ok(loc) => {
success = Some((deduped.clone(), loc));
}
Err(e) => {
errors.push((deduped.clone(), format!("{}", e)));
}
}
}
}
// Fallback 2: walk up ancestor directories
if success.is_none() {
if let Some(fname) = Path::new(&target).file_name() {
let mut ancestor = Path::new(&target);
while let Some(parent) = ancestor.parent() {
let try_path = parent.join(fname);
let try_str = try_path.to_string_lossy().replace('\\', "/");
if try_str == target {
break;
}
attempts.push((try_str.clone(), None));
match Self::fetch_file(r, out_root, &try_str) {
Ok(loc) => {
success = Some((try_str.clone(), loc));
break;
}
Err(e) => {
errors.push((try_str.clone(), format!("{}", e)));
}
}
ancestor = parent;
}
}
}
// Fallback 3: try just the filename in the entry file's directory
if success.is_none() {
if let Some(fname) = Path::new(&target).file_name() {
if !entry_dir.is_empty() {
let entry_dir_path = Path::new(&entry_dir).join(fname);
let entry_dir_str =
entry_dir_path.to_string_lossy().replace('\\', "/");
attempts.push((entry_dir_str.clone(), None));
match Self::fetch_file(r, out_root, &entry_dir_str) {
Ok(loc) => {
success = Some((entry_dir_str.clone(), loc));
}
Err(e) => {
errors.push((entry_dir_str.clone(), format!("{}", e)));
}
}
}
}
}
if let Some((path, loc)) = success {
all.push(loc.clone());
q.push_back((path, loc));
continue;
}
// No fallback possible, return error with all attempts
let error_msg = format!(
"Failed to fetch include '{}'. Attempts: {}. Errors: {}",
inc,
attempts
.iter()
.map(|(p, _)| format!("'{}'", p))
.collect::<Vec<_>>()
.join(", "),
errors
.iter()
.map(|(p, e)| format!("{}: {}", p, e))
.collect::<Vec<_>>()
.join("; ")
);
return Err(error_msg.into());
}
}
}
Ok(FetchResult {
entry_local: all[0].clone(),
all_files: all,
})
// for b in Self::branch_candidates(&r_in.branch) {
// let r = RepoRef { branch: b.clone(), ..r_in.clone() };
// let candidates: Vec<String> = match &r.path {
// Some(p) if p.ends_with(".tal") => vec![p.clone()],
// Some(p) if !p.is_empty() => repo_entry_guesses().iter().map(|g| format!("{}/{}", p.trim_end_matches('/'), g)).collect(),
// _ => repo_entry_guesses().iter().map(|s| s.to_string()).collect(),
// };
// if let Some((entry_rel, entry_local)) =
// candidates.into_iter().find_map(|c| Self::try_entry(&r, out_root, &c).map(|l| (c, l)))
// {
// let mut visited = HashSet::new();
// let mut all = vec![entry_local.clone()];
// visited.insert(entry_rel.clone());
// let mut q = VecDeque::new();
// q.push_back((entry_rel, entry_local));
// let mut steps = 0usize;
// while let Some((repo_rel, local)) = q.pop_front() {
// if steps >= 200 { break; }
// steps += 1;
// let src = fs::read_to_string(&local).unwrap_or_default();
// for inc in parse_includes(&src) {
// let target = resolve_include(&repo_rel, &inc);
// if !visited.insert(target.clone()) { continue; }
// let url = Self::raw_url(&r, &target);
// println!("Fetching include from URL: {}", url);
// match http_get(&url) {
// Ok(bytes) => {
// let loc = out_root.join(&target);
// if write_bytes(&loc, &bytes).is_ok() {
// all.push(loc.clone());
// q.push_back((target, loc));
// }
// }
// Err(_) => eprintln!("warning: include not found in GitHub repo: {} (branch {})", target, r.branch),
// }
// }
// }
// return Ok(FetchResult { entry_local: all[0].clone(), all_files: all });
// }
// }
// Err("Could not find an entry .tal in GitHub repo across tried branches".into())
}
}