Resolve installed engine path in C++ CLI

Author: mearvk

bin/blackbelt.cpp

@@ -1,5 +1,4 @@
 // Black Belt Ethical Auditor - Linux C++17 CLI.
-// Canonical JSON is forwarded unchanged to the shared AI engine transport.
 #include <cstdlib>
 #include <fstream>
 #include <iostream>
@@ -11,7 +10,7 @@ static void usage(const char* p) {
     std::cout << "Usage: " << p << " [--file FILE] [--version] [--help]\n"
               << "       " << p << " < audit.json\n\n"
               << "Black Belt Ethical Auditor Linux CLI (C++17).\n"
-              << "Environment: BBEA_ENGINE_URL, BBEA_MODEL, BBEA_SYSTEM_PROMPT.\n";
+              << "Interactive mode accepts questions or JSON audit objects.\n";
 }
 
 static std::string shellQuote(const std::string& s) {
@@ -20,6 +19,20 @@ static std::string shellQuote(const std::string& s) {
     return r + "'";
 }
 
+static std::string engineCommand() {
+    const char* env = std::getenv("BBEA_ENGINE_CMD");
+    if (env && *env) return env;
+    char exe[4096];
+    ssize_t n = readlink("/proc/self/exe", exe, sizeof(exe) - 1);
+    if (n > 0) {
+        exe[n] = '\0';
+        std::string path(exe);
+        auto slash = path.find_last_of('/');
+        if (slash != std::string::npos) return path.substr(0, slash + 1) + "blackbelt-engine.sh";
+    }
+    return "bin/blackbelt-engine.sh";
+}
+
 static int runEngine(const std::string& input) {
     char tmp[] = "/tmp/blackbelt-cpp-XXXXXX";
     int fd = mkstemp(tmp);
@@ -30,10 +43,7 @@ static int runEngine(const std::string& input) {
         perror("write"); fclose(fp); unlink(tmp); return 2;
     }
     fclose(fp);
-
-    const char* env = std::getenv("BBEA_ENGINE_CMD");
-    std::string engine = (env && *env) ? env : "bin/blackbelt-engine.sh";
-    std::string command = "cat " + shellQuote(tmp) + " | " + shellQuote(engine);
+    std::string command = "cat " + shellQuote(tmp) + " | " + shellQuote(engineCommand());
     int status = std::system(command.c_str());
     unlink(tmp);
     if (status == -1) return 3;
@@ -42,15 +52,15 @@ static int runEngine(const std::string& input) {
 
 static int interactive() {
     std::cout << "Black Belt Ethical Auditor\n"
-              << "Enter a JSON audit object, or type 'help' or 'quit'.\n";
+              << "Ask a question or enter a JSON audit object. Type 'help' or 'quit'.\n";
     std::string line;
     for (;;) {
         std::cout << "black-belt> " << std::flush;
         if (!std::getline(std::cin, line)) break;
         if (line.empty()) continue;
         if (line == "quit" || line == "exit") break;
         if (line == "help") {
-            std::cout << "Paste a complete BBEA JSON audit object at the prompt.\n"
+            std::cout << "Enter a natural-language question or a complete BBEA JSON audit object.\n"
                       << "Commands: help, quit, exit\n";
             continue;
         }
@@ -66,23 +76,20 @@ int main(int argc, char** argv) {
     for (int i = 1; i < argc; ++i) {
         std::string a = argv[i];
         if (a == "--help" || a == "-h") { usage(argv[0]); return 0; }
-        if (a == "--version") { std::cout << "blackbelt-cpp 1.1 (BBEA CLI v2 transport)\n"; return 0; }
+        if (a == "--version") { std::cout << "blackbelt-cpp 1.2 (BBEA CLI v2 transport)\n"; return 0; }
         if (a == "--file" && i + 1 < argc) { file = argv[++i]; continue; }
         std::cerr << "Unknown argument: " << a << '\n'; usage(argv[0]); return 2;
     }
-
     if (file.empty() && isatty(STDIN_FILENO)) return interactive();
-
     std::string input;
-    if (file.empty()) {
-        input.assign(std::istreambuf_iterator<char>(std::cin), std::istreambuf_iterator<char>());
-    } else {
+    if (file.empty()) input.assign(std::istreambuf_iterator<char>(std::cin), std::istreambuf_iterator<char>());
+    else {
         std::ifstream in(file, std::ios::binary);
         if (!in) { std::cerr << "Unable to open " << file << '\n'; return 2; }
         input.assign(std::istreambuf_iterator<char>(in), std::istreambuf_iterator<char>());
     }
     if (input.find_first_not_of(" \t\r\n") == std::string::npos) {
-        std::cerr << "No JSON audit input received.\n"; return 2;
+        std::cerr << "No audit input received.\n"; return 2;
     }
     return runEngine(input);
 }