better path resolution

add.ce

@@ -78,29 +78,6 @@ if (!fd.is_file(cwd + '/cell.toml')) {
   $stop()
 }
 
-// Recursively find all cell packages in a directory
-function find_packages(dir) {
-  var found = []
-  var list = fd.readdir(dir)
-  if (!list) return found
-  if (fd.is_file(dir + '/cell.toml')) {
-    push(found, dir)
-  }
-  arrfor(list, function(item) {
-    if (item == '.' || item == '..' || item == '.cell' || item == '.git') return
-    var full = dir + '/' + item
-    var st = fd.stat(full)
-    var sub = null
-    if (st && st.isDirectory) {
-      sub = find_packages(full)
-      arrfor(sub, function(p) {
-        push(found, p)
-      })
-    }
-  })
-  return found
-}
-
 // If -r flag, find all packages recursively and add each
 if (recursive) {
   if (!locator) {
@@ -111,7 +88,9 @@ if (recursive) {
     log.error(`${locator} is not a directory`)
     $stop()
   }
-  locators = find_packages(resolved)
+  locators = filter(pkg.find_packages(resolved), function(p) {
+    return p != cwd
+  })
   if (length(locators) == 0) {
     log.console("No packages found in " + resolved)
     $stop()

fetch.ce

@@ -33,12 +33,26 @@ for (i = 0; i < length(args); i++) {
 var all_packages = shop.list_packages()
 var lock = shop.load_lock()
 var packages_to_fetch = []
+var _update = null
 
 if (target_pkg) {
-  // Fetch specific package
+  // Fetch specific package - auto-update if not in lock
   if (find(all_packages, target_pkg) == null) {
-    log.error("Package not found: " + target_pkg)
-    $stop()
+    log.console("Package not in lock, updating: " + target_pkg)
+    _update = function() {
+      shop.update(target_pkg)
+    } disruption {
+      log.error("Could not update package: " + target_pkg)
+      $stop()
+    }
+    _update()
+    // Reload after update
+    all_packages = shop.list_packages()
+    lock = shop.load_lock()
+    if (find(all_packages, target_pkg) == null) {
+      log.error("Package not found: " + target_pkg)
+      $stop()
+    }
   }
   push(packages_to_fetch, target_pkg)
 } else {

install.ce

@@ -79,28 +79,7 @@ if (locator && (locator == '.' || starts_with(locator, './') || starts_with(loca
   }
 }
 
-// Recursively find all cell packages in a directory
-function find_packages(dir) {
-  var found = []
-  var list = fd.readdir(dir)
-  if (!list) return found
-  if (fd.is_file(dir + '/cell.toml')) {
-    push(found, dir)
-  }
-  arrfor(list, function(item) {
-    if (item == '.' || item == '..' || item == '.cell' || item == '.git') return
-    var full = dir + '/' + item
-    var st = fd.stat(full)
-    var sub = null
-    if (st && st.isDirectory) {
-      sub = find_packages(full)
-      arrfor(sub, function(p) {
-        push(found, p)
-      })
-    }
-  })
-  return found
-}
+var cwd = fd.realpath('.')
 
 // If -r flag, find all packages recursively and install each
 if (recursive) {
@@ -112,7 +91,9 @@ if (recursive) {
     log.error(`${locator} is not a directory`)
     $stop()
   }
-  locators = find_packages(resolved)
+  locators = filter(pkg.find_packages(resolved), function(p) {
+    return p != cwd
+  })
   if (length(locators) == 0) {
     log.console("No packages found in " + resolved)
     $stop()
@@ -133,6 +114,16 @@ var visited = {}
 
 // Recursive mode: install all found packages and exit
 if (recursive) {
+  if (dry_run) {
+    log.console("Would install:")
+    arrfor(locators, function(loc) {
+      var lock = shop.load_lock()
+      var exists = lock[loc] != null
+      log.console("  " + loc + (exists ? " (already installed)" : ""))
+    })
+    $stop()
+  }
+
   arrfor(locators, function(loc) {
     log.console("  Installing " + loc + "...")
     var _inst = function() {

internal/engine.cm

@@ -1204,23 +1204,23 @@ if (ends_with(prog, '.ce')) prog = text(prog, 0, -3)
 
 var package = use_core('package')
 
-// Find the .ce file
-var prog_path = prog + ".ce"
-var pkg_dir = null
-var core_dir = null
-if (!fd.is_file(prog_path)) {
-  pkg_dir = package.find_package_dir(".")
-  if (pkg_dir)
-    prog_path = pkg_dir + '/' + prog + '.ce'
-}
-if (!fd.is_file(prog_path)) {
-  // Check core packages
-  core_dir = core_path
-  prog_path = core_dir + '/' + prog + '.ce'
-}
-if (!fd.is_file(prog_path)) {
-  os.print(`Main program ${prog} could not be found\n`)
-  os.exit(1)
+// Find the .ce file using unified resolver
+var cwd_package = package.find_package_dir(".")
+var prog_info = shop.resolve_program ? shop.resolve_program(prog, cwd_package) : null
+var prog_path = null
+if (prog_info) {
+  prog_path = prog_info.path
+} else {
+  // Fallback: check CWD, package dir, and core
+  prog_path = prog + ".ce"
+  if (!fd.is_file(prog_path) && cwd_package)
+    prog_path = cwd_package + '/' + prog + '.ce'
+  if (!fd.is_file(prog_path))
+    prog_path = core_path + '/' + prog + '.ce'
+  if (!fd.is_file(prog_path)) {
+    os.print(`Main program ${prog} could not be found\n`)
+    os.exit(1)
+  }
 }
 
 $_.clock(_ => {
@@ -1244,18 +1244,33 @@ $_.clock(_ => {
 
   var pkg = file_info ? file_info.package : null
 
-  // Verify all transitive dependency packages are present
+  // Verify all transitive dependency packages are present, auto-install if missing
   var _deps = null
   var _di = 0
   var _dep_dir = null
+  var _auto_install = null
   if (pkg) {
     _deps = package.gather_dependencies(pkg)
     _di = 0
     while (_di < length(_deps)) {
       _dep_dir = package.get_dir(_deps[_di])
       if (!fd.is_dir(_dep_dir)) {
-        log.error('missing dependency package: ' + _deps[_di])
-        disrupt
+        log.console('installing missing dependency: ' + _deps[_di])
+        _auto_install = function() {
+          shop.update(_deps[_di])
+          shop.fetch(_deps[_di])
+          shop.extract(_deps[_di])
+          shop.build_package_scripts(_deps[_di])
+        } disruption {
+          log.error('failed to install dependency: ' + _deps[_di])
+          disrupt
+        }
+        _auto_install()
+        _dep_dir = package.get_dir(_deps[_di])
+        if (!fd.is_dir(_dep_dir)) {
+          log.error('missing dependency package: ' + _deps[_di])
+          disrupt
+        }
       }
       _di = _di + 1
     }

internal/os.c

@@ -318,7 +318,9 @@ JSC_SCALL(os_system,
 )
 
 JSC_CCALL(os_exit,
-  exit(0);
+  int code = 0;
+  if (argc > 0) JS_ToInt32(js, &code, argv[0]);
+  exit(code);
 )
 
 static JSValue js_os_dylib_open(JSContext *js, JSValue self, int argc, JSValue *argv)
@@ -714,7 +716,7 @@ static const JSCFunctionListEntry js_os_funcs[] = {
   MIST_FUNC_DEF(os, rusage, 0),
   MIST_FUNC_DEF(os, mallinfo, 0),
   MIST_FUNC_DEF(os, system, 1),
-  MIST_FUNC_DEF(os, exit, 0),
+  MIST_FUNC_DEF(os, exit, 1),
   MIST_FUNC_DEF(os, sleep, 1),
   MIST_FUNC_DEF(os, dylib_open, 1),
   MIST_FUNC_DEF(os, dylib_preload, 1),

internal/shop.cm

@@ -778,6 +778,11 @@ function resolve_path(path, ctx)
   var ctx_path = null
   var alias = null
   var package_path = null
+  var lock = null
+  var best_pkg = null
+  var best_remainder = null
+  var shop_dir = null
+  var shop_file = null
 
   if (explicit) {
     if (is_internal_path(explicit.path) && ctx && explicit.package != ctx)
@@ -823,6 +828,25 @@ function resolve_path(path, ctx)
   if (fd.is_file(package_path))
     return {path: package_path, scope: SCOPE_PACKAGE, pkg: ctx}
 
+  // Shop package scanning: longest prefix match against lock.toml entries
+  lock = Shop.load_lock()
+  best_pkg = null
+  best_remainder = null
+  arrfor(array(lock), function(pkg_name) {
+    if (starts_with(path, pkg_name + '/')) {
+      if (!best_pkg || length(pkg_name) > length(best_pkg)) {
+        best_pkg = pkg_name
+        best_remainder = text(path, length(pkg_name) + 1)
+      }
+    }
+  })
+  if (best_pkg && best_remainder) {
+    shop_dir = get_packages_dir() + '/' + safe_package_path(best_pkg)
+    shop_file = shop_dir + '/' + best_remainder
+    if (fd.is_file(shop_file))
+      return {path: shop_file, scope: SCOPE_PACKAGE, pkg: best_pkg}
+  }
+
   core_dir = Shop.get_core_dir()
   core_file_path = core_dir + '/' + path
   if (fd.is_file(core_file_path))
@@ -1298,6 +1322,64 @@ Shop.resolve_use_path = function(path, ctx) {
   return info.path
 }
 
+// Resolve a program (.ce) path using the unified resolver.
+// Returns {path, scope, pkg} or null.
+// If the path looks like a remote package locator and is not found locally,
+// attempts to auto-fetch and install it.
+Shop.resolve_program = function(prog, package_context) {
+  var info = resolve_path(prog + '.ce', package_context)
+  if (info) return info
+
+  // Auto-install: if the path matches a recognized remote locator, try fetching
+  var lock = Shop.load_lock()
+  var best_pkg = null
+  var best_remainder = null
+  var pkg_info = null
+  var parts = array(prog, '/')
+  var i = 0
+  var candidate = null
+  var _auto = null
+  arrfor(array(lock), function(pkg_name) {
+    if (starts_with(prog, pkg_name + '/')) {
+      if (!best_pkg || length(pkg_name) > length(best_pkg)) {
+        best_pkg = pkg_name
+        best_remainder = text(prog, length(pkg_name) + 1)
+      }
+    }
+  })
+
+  // If not in lock, check if this looks like a fetchable package
+  if (!best_pkg) {
+    for (i = length(parts) - 1; i >= 1; i--) {
+      candidate = text(array(parts, 0, i), '/')
+      pkg_info = Shop.resolve_package_info(candidate)
+      if (pkg_info && pkg_info != 'local') {
+        best_pkg = candidate
+        best_remainder = text(array(parts, i), '/')
+        break
+      }
+    }
+  }
+
+  if (best_pkg && best_remainder) {
+    log.console('fetching ' + best_pkg + '...')
+    _auto = function() {
+      Shop.update(best_pkg)
+      Shop.fetch(best_pkg)
+      Shop.extract(best_pkg)
+      Shop.build_package_scripts(best_pkg)
+    } disruption {
+      return null
+    }
+    _auto()
+    // Retry resolution
+    info = resolve_path(prog + '.ce', package_context)
+    if (info) return info
+  }
+
+  return null
+}
+
 // Resolve a use() module path to {resolved_path, package, type} without compiling.
 // type is 'script', 'native', or null. Checks .cm files, C symbols, and aliases.
 Shop.resolve_import_info = function(path, ctx) {
@@ -1410,7 +1492,7 @@ Shop.fetch = function(pkg) {
       if (actual_hash == expected_hash) {
         return { status: 'cached' }
       }
-      log.console("Zip hash mismatch for " + pkg + ", re-fetching...")
+      log.shop("Zip hash mismatch for " + pkg + ", re-fetching...")
     } else {
       // No hash stored yet - compute and store it
       actual_hash = text(crypto.blake2(zip_blob), 'h')
@@ -1522,13 +1604,13 @@ Shop.update = function(pkg) {
   var lock_entry = lock[pkg]
   var info = Shop.resolve_package_info(pkg)
 
-  log.console(`checking ${pkg}`)
+  log.shop(`checking ${pkg}`)
 
   var new_entry = null
   if (info == 'local') {
     // Check if local path exists
     if (!fd.is_dir(pkg)) {
-      log.console(`  Local path does not exist: ${pkg}`)
+      log.shop(`  Local path does not exist: ${pkg}`)
       return null
     }
     // Local packages always get a lock entry
@@ -1544,8 +1626,8 @@ Shop.update = function(pkg) {
   var local_commit = lock_entry ? lock_entry.commit : null
   var remote_commit = fetch_remote_hash(pkg)
 
-  log.console(`local commit: ${local_commit}`)
-  log.console(`remote commit: ${remote_commit}`)
+  log.shop(`local commit: ${local_commit}`)
+  log.shop(`remote commit: ${remote_commit}`)
 
   if (!remote_commit) {
     log.error("Could not resolve commit for " + pkg)
@@ -1574,7 +1656,7 @@ function install_zip(zip_blob, target_dir) {
   if (fd.is_link(target_dir)) fd.unlink(target_dir)
   if (fd.is_dir(target_dir)) fd.rmdir(target_dir, 1)
 
-  log.console("Extracting to " + target_dir)
+  log.shop("Extracting to " + target_dir)
   ensure_dir(target_dir)
 
   var count = zip.count()

package.cm

@@ -202,6 +202,28 @@ package.gather_dependencies = function(name)
   return array(all_deps)
 }
 
+// Recursively find all cell packages (dirs with cell.toml) under a directory
+package.find_packages = function(dir) {
+  var found = []
+  var list = fd.readdir(dir)
+  if (!list) return found
+  if (fd.is_file(dir + '/cell.toml'))
+    push(found, dir)
+  arrfor(list, function(item) {
+    if (item == '.' || item == '..' || item == '.cell' || item == '.git') return
+    var full = dir + '/' + item
+    var st = fd.stat(full)
+    var sub = null
+    if (st && st.isDirectory) {
+      sub = package.find_packages(full)
+      arrfor(sub, function(p) {
+        push(found, p)
+      })
+    }
+  })
+  return found
+}
+
 package.list_files = function(pkg) {
   var dir = get_path(pkg)
   if (!fd.is_dir(dir)) return []

source/runtime.c

@@ -8057,6 +8057,11 @@ static JSValue js_cell_text_format (JSContext *ctx, JSValue this_val, int argc,
       }
     }
 
+    if (!made_substitution && JS_IsNull (cv_ref.val)) {
+      substitution = JS_NewString (ctx, "null");
+      made_substitution = 1;
+    }
+
     if (!made_substitution && !JS_IsNull (cv_ref.val)) {
       JSValue conv_text_val = JS_ToString (ctx, cv_ref.val);
       if (JS_IsText (conv_text_val)) {