Allow importing hyphenated packages with underscores, bump to v1.2.2

Packages with hyphens in their name (e.g. ccl-testpkg) are now also
registered under the underscore variant (ccl_testpkg), since hyphens
are not valid in identifiers.

Author: TRC-Loop

ccolon/main.go

@@ -17,7 +17,7 @@ import (
 	"github.com/TRC-Loop/ccolon/vm"
 )
 
-const version = "1.2.1"
+const version = "1.2.2"
 
 func main() {
 	if len(os.Args) < 2 {

ccolon/pkg/loader.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/TRC-Loop/ccolon/compiler"
 	"github.com/TRC-Loop/ccolon/vm"
@@ -115,6 +116,12 @@ func LoadPackages(machine *vm.VM, compileSource func(string) (*compiler.FuncObje
 				}
 
 				machine.RegisterModule(m.Name, mod)
+				// Also register under underscore alias so packages with
+				// hyphens can be imported using underscores (e.g. ccl_testpkg
+				// for ccl-testpkg), since "-" is not valid in identifiers.
+				if strings.Contains(m.Name, "-") {
+					machine.RegisterModule(strings.ReplaceAll(m.Name, "-", "_"), mod)
+				}
 			}
 		}
 	}