common : dedup preset and cached model entries in /v1/models (ggml-org#25131)

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

Author: angt

common/preset.cpp

@@ -7,6 +7,7 @@
 #include <fstream>
 #include <sstream>
 #include <filesystem>
+#include <regex>
 
 static std::string rm_leading_dashes(const std::string & str) {
     size_t pos = 0;
@@ -16,6 +17,23 @@ static std::string rm_leading_dashes(const std::string & str) {
     return str.substr(pos);
 }
 
+static std::string canonical_tag(const std::string & tag) {
+    static const std::regex re_tag("[-.]([A-Z0-9_]+)$", std::regex::icase);
+    std::smatch m;
+    if (std::regex_search(tag, m, re_tag)) {
+        std::string canon = m[1].str();
+        for (char & c : canon) {
+            c = (char) std::toupper((unsigned char) c);
+        }
+        return canon;
+    }
+    std::string upper = tag;
+    for (char & c : upper) {
+        c = (char) std::toupper((unsigned char) c);
+    }
+    return upper;
+}
+
 std::vector<std::string> common_preset::to_args(const std::string & bin_path) const {
     std::vector<std::string> args;
 
@@ -270,11 +288,18 @@ common_presets common_preset_context::load_from_ini(const std::string & path, co
 
     for (auto section : ini_data) {
         common_preset preset;
-        if (section.first.empty()) {
-            preset.name = COMMON_PRESET_DEFAULT_NAME;
-        } else {
-            preset.name = section.first;
+        std::string section_name = section.first.empty() ? std::string(COMMON_PRESET_DEFAULT_NAME) : section.first;
+        if (section_name != "*" && section_name != COMMON_PRESET_DEFAULT_NAME) {
+            auto colon_idx = section_name.rfind(':');
+            if (colon_idx != std::string::npos) {
+                std::string tag       = section_name.substr(colon_idx + 1);
+                std::string canon_tag = canonical_tag(tag);
+                if (canon_tag != tag) {
+                    section_name = section_name.substr(0, colon_idx + 1) + canon_tag;
+                }
+            }
         }
+        preset.name = section_name;
         LOG_DBG("loading preset: %s\n", preset.name.c_str());
         for (const auto & [key, value] : section.second) {
             if (key == "version") {