bshell: re-organise build into three separate components

bshell: the front-end binary
bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts
bshell.core: contains the builtin commandlets and aliases

bshell.runtime/compile/compile.c

@@ -0,0 +1,40 @@
+#include "compile-node.h"
+
+#include <bshell/ast.h>
+#include <bshell/compile.h>
+#include <bshell/status.h>
+
+extern enum bshell_status compile_node(
+	struct compile_ctx *ctx,
+	struct bshell_ast_node *src)
+{
+	switch (src->n_type) {
+	case BSHELL_AST_IF:
+		return compile_if(ctx, src);
+	case BSHELL_AST_BLOCK:
+		return compile_block_immediate(ctx, src);
+	default:
+		return compile_expression(ctx, src);
+	}
+
+	return BSHELL_SUCCESS;
+}
+
+enum bshell_status bshell_compile(
+	struct bshell_ast_node *src,
+	bshell_scriptblock *dest)
+{
+	struct compile_ctx ctx = {.c_block = dest};
+
+	enum bshell_status status = compile_node(&ctx, src);
+	if (status != BSHELL_SUCCESS) {
+		return status;
+	}
+
+	status = compile_resolve_labels(&ctx);
+	if (status != BSHELL_SUCCESS) {
+		return status;
+	}
+
+	return BSHELL_SUCCESS;
+}