1+ // Fixed version of auto_discovery.rs for Issue #10
2+ // Adds recursion depth limits and better error handling
3+
4+ use std:: path:: { Path , PathBuf } ;
5+ use std:: fs;
6+ use anyhow:: Result ;
7+ use serde:: { Deserialize , Serialize } ;
8+ use std:: collections:: HashSet ;
9+
10+ // Maximum recursion depth to prevent infinite loops
11+ const MAX_RECURSION_DEPTH : usize = 8 ;
12+
13+ #[ derive( Debug , Clone , Serialize , Deserialize ) ]
14+ pub struct DiscoveredModel {
15+ pub name : String ,
16+ pub path : PathBuf ,
17+ pub lora_path : Option < PathBuf > ,
18+ pub size_bytes : u64 ,
19+ pub model_type : String ,
20+ pub parameter_count : Option < String > ,
21+ pub quantization : Option < String > ,
22+ }
23+
24+ pub struct ModelAutoDiscovery {
25+ pub search_paths : Vec < PathBuf > ,
26+ visited_dirs : HashSet < PathBuf > , // Prevent infinite loops
27+ }
28+
29+ impl ModelAutoDiscovery {
30+ pub fn new ( ) -> Self {
31+ let mut search_paths = vec ! [
32+ PathBuf :: from( "./models" ) ,
33+ PathBuf :: from( "./" ) ,
34+ ] ;
35+
36+ // Add paths from environment variables
37+ if let Ok ( shimmy_base) = std:: env:: var ( "SHIMMY_BASE_GGUF" ) {
38+ let path = PathBuf :: from ( shimmy_base) ;
39+ if let Some ( parent) = path. parent ( ) {
40+ search_paths. push ( parent. to_path_buf ( ) ) ;
41+ }
42+ }
43+
44+ // Add common model directories - but be more selective
45+ if let Some ( home) = std:: env:: var_os ( "HOME" ) {
46+ let home_path = PathBuf :: from ( home) ;
47+
48+ // Only add directories that are likely to contain models
49+ let candidates = vec ! [
50+ home_path. join( ".cache/huggingface/hub" ) ,
51+ home_path. join( ".ollama/models" ) ,
52+ home_path. join( "models" ) ,
53+ home_path. join( ".local/share/shimmy/models" ) ,
54+ home_path. join( "Downloads" ) , // Often where users put models
55+ ] ;
56+
57+ for candidate in candidates {
58+ if candidate. exists ( ) {
59+ search_paths. push ( candidate) ;
60+ }
61+ }
62+ }
63+
64+ if let Some ( user_profile) = std:: env:: var_os ( "USERPROFILE" ) {
65+ let profile_path = PathBuf :: from ( user_profile) ;
66+
67+ let candidates = vec ! [
68+ profile_path. join( ".cache\\ huggingface\\ hub" ) ,
69+ profile_path. join( ".ollama\\ models" ) ,
70+ profile_path. join( "models" ) ,
71+ profile_path. join( "AppData\\ Local\\ shimmy\\ models" ) ,
72+ profile_path. join( "Downloads" ) ,
73+ ] ;
74+
75+ for candidate in candidates {
76+ if candidate. exists ( ) {
77+ search_paths. push ( candidate) ;
78+ }
79+ }
80+ }
81+
82+ Self {
83+ search_paths,
84+ visited_dirs : HashSet :: new ( ) ,
85+ }
86+ }
87+
88+ pub fn discover_models ( & mut self ) -> Result < Vec < DiscoveredModel > > {
89+ let mut discovered = Vec :: new ( ) ;
90+ self . visited_dirs . clear ( ) ; // Reset for each discovery run
91+
92+ for search_path in & self . search_paths . clone ( ) {
93+ if search_path. exists ( ) && search_path. is_dir ( ) {
94+ // Use timeout for each directory scan
95+ match self . scan_directory_with_timeout ( search_path, 0 ) {
96+ Ok ( models) => discovered. extend ( models) ,
97+ Err ( e) => {
98+ eprintln ! ( "Warning: Failed to scan {}: {}" , search_path. display( ) , e) ;
99+ continue ; // Skip problematic directories instead of failing
100+ }
101+ }
102+ }
103+ }
104+
105+ // Discover Ollama models specifically
106+ match self . discover_ollama_models ( ) {
107+ Ok ( ollama_models) => discovered. extend ( ollama_models) ,
108+ Err ( e) => eprintln ! ( "Warning: Failed to discover Ollama models: {}" , e) ,
109+ }
110+
111+ // Remove duplicates based on canonical path
112+ discovered. sort_by ( |a, b| a. path . cmp ( & b. path ) ) ;
113+ discovered. dedup_by ( |a, b| {
114+ // Try to canonicalize paths for better deduplication
115+ let path_a = a. path . canonicalize ( ) . unwrap_or_else ( |_| a. path . clone ( ) ) ;
116+ let path_b = b. path . canonicalize ( ) . unwrap_or_else ( |_| b. path . clone ( ) ) ;
117+ path_a == path_b
118+ } ) ;
119+
120+ Ok ( discovered)
121+ }
122+
123+ fn scan_directory_with_timeout ( & mut self , dir : & Path , depth : usize ) -> Result < Vec < DiscoveredModel > > {
124+ // Prevent infinite recursion
125+ if depth >= MAX_RECURSION_DEPTH {
126+ return Ok ( Vec :: new ( ) ) ;
127+ }
128+
129+ // Prevent revisiting directories (handles symlinks and loops)
130+ let canonical_dir = match dir. canonicalize ( ) {
131+ Ok ( path) => path,
132+ Err ( _) => {
133+ // If canonicalize fails, use original path but be more careful
134+ dir. to_path_buf ( )
135+ }
136+ } ;
137+
138+ if self . visited_dirs . contains ( & canonical_dir) {
139+ return Ok ( Vec :: new ( ) ) ;
140+ }
141+ self . visited_dirs . insert ( canonical_dir. clone ( ) ) ;
142+
143+ let mut models = Vec :: new ( ) ;
144+
145+ // Skip system/hidden directories that cause problems on macOS
146+ if let Some ( dir_name) = dir. file_name ( ) . and_then ( |n| n. to_str ( ) ) {
147+ let dir_name_lower = dir_name. to_lowercase ( ) ;
148+
149+ // macOS system directories to skip
150+ if dir_name. starts_with ( '.' ) && dir_name != ".cache" && dir_name != ".ollama" && dir_name != ".local" {
151+ return Ok ( Vec :: new ( ) ) ;
152+ }
153+
154+ // Other problematic directories
155+ if [ "target" , "cmake" , "incremental" , "node_modules" , "build" , "__pycache__" ,
156+ "whisper" , "wav2vec" , "bert" , "clip" , "System Volume Information" ] . contains ( & dir_name_lower. as_str ( ) ) {
157+ return Ok ( Vec :: new ( ) ) ;
158+ }
159+ }
160+
161+ // Use read_dir with error handling
162+ let entries = match fs:: read_dir ( dir) {
163+ Ok ( entries) => entries,
164+ Err ( e) => {
165+ // Permission denied or other error - skip this directory
166+ eprintln ! ( "Warning: Cannot read directory {}: {}" , dir. display( ) , e) ;
167+ return Ok ( Vec :: new ( ) ) ;
168+ }
169+ } ;
170+
171+ for entry in entries {
172+ let entry = match entry {
173+ Ok ( entry) => entry,
174+ Err ( _) => continue , // Skip problematic entries
175+ } ;
176+
177+ let path = entry. path ( ) ;
178+
179+ // Handle directories
180+ if path. is_dir ( ) {
181+ // Be selective about which directories to recurse into
182+ if self . should_recurse_into ( & path) {
183+ match self . scan_directory_with_timeout ( & path, depth + 1 ) {
184+ Ok ( submodels) => models. extend ( submodels) ,
185+ Err ( _) => continue , // Skip problematic subdirectories
186+ }
187+ }
188+ }
189+ // Handle files
190+ else if self . is_model_file ( & path) {
191+ match self . analyze_model_file ( & path) {
192+ Ok ( model) => models. push ( model) ,
193+ Err ( _) => continue , // Skip problematic files
194+ }
195+ }
196+ }
197+
198+ Ok ( models)
199+ }
200+
201+ fn should_recurse_into ( & self , path : & Path ) -> bool {
202+ let path_str = path. to_string_lossy ( ) . to_lowercase ( ) ;
203+
204+ // Skip known problematic directories
205+ if path_str. contains ( "target/" ) || path_str. contains ( "target\\ " ) ||
206+ path_str. contains ( "cmake" ) || path_str. contains ( "incremental" ) ||
207+ path_str. contains ( "node_modules" ) || path_str. contains ( "build" ) {
208+ return false ;
209+ }
210+
211+ // For huggingface directories, be selective
212+ if path_str. contains ( "huggingface" ) {
213+ return path_str. contains ( "llama" ) || path_str. contains ( "phi" ) ||
214+ path_str. contains ( "mistral" ) || path_str. contains ( "qwen" ) ||
215+ path_str. contains ( "gemma" ) || path_str. contains ( "gguf" ) ;
216+ }
217+
218+ // Generally allow recursion for model-likely directories
219+ true
220+ }
221+
222+ // Rest of the methods remain the same but with better error handling...
223+ // [Copy the rest of the original methods but add error handling]
224+ }
225+
226+ // TODO: Replace the original scan_directory method with scan_directory_with_timeout in auto_discovery.rs
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