cmake: find fx.io and fx.diagnostics

the runtime will handle writing any output values to the terminal if necessary. instead,
write-output can now be used to write arbitrary values into the pipeline for later commands
to use.

CMakeLists.txt

@@ -15,7 +15,7 @@ if (NOT DEFINED bshell_enable_floating_point)
 	set(bshell_enable_floating_point 1)
 endif ()
 
-set(required_fx_assemblies fx.runtime fx.collections)
+set(required_fx_assemblies fx.runtime fx.collections fx.io fx.diagnostics)
 
 if (bshell_interactive)
 	set(required_fx_assemblies ${required_fx_assemblies} fx.term)

bshell.core/cmdlets/foreach-object.c

@@ -21,7 +21,9 @@ struct bshell_foreach_object_p {
 	bshell_scriptblock *f_block;
 };
 
-static enum bshell_status begin_processing(bshell_cmdlet *cmdlet)
+static enum bshell_status begin_processing(
+	bshell_cmdlet *cmdlet,
+	enum bshell_command_position position)
 {
 	struct bshell_foreach_object_p *p
 		= fx_object_get_private(cmdlet, BSHELL_TYPE_FOREACH_OBJECT);

bshell.core/cmdlets/get-command.c

@@ -22,7 +22,9 @@ struct bshell_get_command_p {
 	bool c_eof;
 };
 
-static enum bshell_status begin_processing(bshell_cmdlet *cmdlet)
+static enum bshell_status begin_processing(
+	bshell_cmdlet *cmdlet,
+	enum bshell_command_position position)
 {
 	struct bshell_get_command_p *p
 		= fx_object_get_private(cmdlet, BSHELL_TYPE_GET_COMMAND);

bshell.core/cmdlets/get-verb.c

@@ -20,7 +20,9 @@ struct bshell_get_verb_p {
 	const fx_iterator *c_it;
 };
 
-static enum bshell_status begin_processing(bshell_cmdlet *cmdlet)
+static enum bshell_status begin_processing(
+	bshell_cmdlet *cmdlet,
+	enum bshell_command_position position)
 {
 	struct bshell_get_verb_p *p
 		= fx_object_get_private(cmdlet, BSHELL_TYPE_GET_VERB);

bshell.core/cmdlets/write-output.c

@@ -1,6 +1,5 @@
 #include <bshell/command/cmdlet.h>
 #include <bshell/command/command.h>
-#include <bshell/format.h>
 #include <bshell/runtime/pipeline.h>
 #include <bshell/status.h>
 #include <fx/collections/array.h>
@@ -19,67 +18,18 @@ FX_TYPE_CLASS_DECLARATION_BEGIN(bshell_write_output)
 FX_TYPE_CLASS_DECLARATION_END(bshell_write_output)
 
 struct bshell_write_output_p {
-	struct bshell_table_ctx w_table_ctx;
-	bool w_table_initialised;
+	size_t w_arg_count;
+	size_t w_arg_index;
 };
 
-static void initialise_table(
-	struct bshell_write_output_p *cmd,
-	const fx_value *first_record)
-{
-	bshell_table_ctx_init(&cmd->w_table_ctx, fx_stdout);
-	const fx_type *ty = fx_type_get_by_id(first_record->v_type);
-	bshell_table_ctx_prepare_columns_from_format(
-		&cmd->w_table_ctx,
-		ty,
-		NULL);
-	bshell_table_ctx_print_headers(&cmd->w_table_ctx);
-	cmd->w_table_initialised = true;
-}
-
-static bool value_requires_table(const fx_value *value)
-{
-	if (fx_type_is_value_type(value->v_type)) {
-		return false;
-	}
-
-	if (fx_value_is_type(value, FX_TYPE_STRING)
-	    || fx_value_is_type(value, FX_TYPE_ARRAY)) {
-		return false;
-	}
-
-	return true;
-}
-
-static void write_value(
-	struct bshell_write_output_p *cmd,
-	const fx_value *value)
-{
-	if (!value_requires_table(value)) {
-		fx_value_to_string(value, fx_stdout, NULL);
-		fx_stream_write_char(fx_stdout, '\n');
-		return;
-	}
-
-	if (!cmd->w_table_initialised) {
-		initialise_table(cmd, value);
-	}
-
-	bshell_table_ctx_print_record(&cmd->w_table_ctx, value);
-}
-
-static enum bshell_status begin_processing(bshell_cmdlet *cmdlet)
+static enum bshell_status begin_processing(
+	bshell_cmdlet *cmdlet,
+	enum bshell_command_position position)
 {
 	struct bshell_write_output_p *p
 		= fx_object_get_private(cmdlet, BSHELL_TYPE_WRITE_OUTPUT);
-	for (size_t i = 1;; i++) {
-		const fx_value *v = bshell_command_get_arg(cmdlet, i);
-		if (!v) {
-			break;
-		}
-
-		write_value(p, v);
-	}
+	p->w_arg_index = 1;
+	p->w_arg_count = bshell_command_get_arg_count(cmdlet);
 
 	return BSHELL_SUCCESS;
 }
@@ -92,9 +42,16 @@ static enum bshell_status process_record(
 	struct bshell_write_output_p *p
 		= fx_object_get_private(cmdlet, BSHELL_TYPE_WRITE_OUTPUT);
 
+	if (p->w_arg_index < p->w_arg_count) {
+		const fx_value *arg
+			= bshell_command_get_arg(cmdlet, p->w_arg_index++);
+		bshell_pipeline_write_value(pipeline, *arg, false);
+		return BSHELL_SUCCESS;
+	}
+
 	fx_value in = bshell_pipeline_read_value(pipeline);
 	if (fx_value_is_set(&in)) {
-		write_value(p, &in);
+		bshell_pipeline_write_value(pipeline, in, false);
 		fx_value_unset(&in);
 	}
 

bshell.runtime/CMakeLists.txt

@@ -15,7 +15,7 @@ endforeach (d)
 
 add_library(bshell.runtime SHARED ${sources})
 
-target_link_libraries(bshell.runtime FX::Runtime FX::Collections)
+target_link_libraries(bshell.runtime FX::Runtime FX::Collections FX::Io FX::Diagnostics)
 
 if (bshell_interactive)
 	target_link_libraries(bshell.runtime FX::Term)

bshell.runtime/command/cmdlet.c

@@ -16,9 +16,8 @@ static enum bshell_status get_callable_name_static(
 	const fx_type *ty,
 	fx_string *out)
 {
-	bshell_cmdlet_class *class = fx_type_get_interface(
-		ty,
-		BSHELL_TYPE_CMDLET);
+	bshell_cmdlet_class *class
+		= fx_type_get_interface(ty, BSHELL_TYPE_CMDLET);
 	if (!class) {
 		return BSHELL_ERR_NOT_SUPPORTED;
 	}

bshell.runtime/command/command.c

@@ -57,6 +57,11 @@ static const fx_value *command_get_arg(
 	return &cmd->cmd_args[index];
 }
 
+static size_t command_get_arg_count(struct bshell_command_p *cmd)
+{
+	return cmd->cmd_nr_args;
+}
+
 static fx_status get_command_type(
 	const fx_value *cmd_v,
 	const fx_property *prop,
@@ -236,14 +241,25 @@ const fx_value *bshell_command_get_arg(bshell_command *cmd, size_t index)
 		index);
 }
 
-enum bshell_status bshell_command_begin_processing(bshell_command *command)
+size_t bshell_command_get_arg_count(const bshell_command *cmd)
 {
-	FX_CLASS_DISPATCH_VIRTUAL_0(
+	FX_CLASS_DISPATCH_STATIC_0(
+		BSHELL_TYPE_COMMAND,
+		command_get_arg_count,
+		cmd);
+}
+
+enum bshell_status bshell_command_begin_processing(
+	bshell_command *command,
+	enum bshell_command_position position)
+{
+	FX_CLASS_DISPATCH_VIRTUAL(
 		bshell_command,
 		BSHELL_TYPE_COMMAND,
 		BSHELL_ERR_NOT_SUPPORTED,
 		c_begin_processing,
-		command);
+		command,
+		position);
 }
 
 enum bshell_status bshell_command_process_record(

bshell.runtime/command/function.c

@@ -43,7 +43,9 @@ static enum bshell_status get_callable_name(
 	return BSHELL_SUCCESS;
 }
 
-static enum bshell_status begin_processing(bshell_command *cmd)
+static enum bshell_status begin_processing(
+	bshell_command *cmd,
+	enum bshell_command_position position)
 {
 	return BSHELL_SUCCESS;
 }

bshell.runtime/command/native-command.c

@@ -0,0 +1,232 @@
+#include <bshell/command/command.h>
+#include <bshell/command/native-command.h>
+#include <bshell/format.h>
+#include <bshell/runtime/pipeline.h>
+#include <bshell/status.h>
+#include <fx/diagnostics/process.h>
+#include <fx/reflection/function.h>
+#include <fx/string.h>
+#include <fx/vector.h>
+
+enum {
+	F_REDIRECT_STDIN = 0x01u,
+	F_REDIRECT_STDOUT = 0x02u,
+};
+
+struct bshell_native_command_p {
+	int cmd_flags;
+	fx_string *cmd_path;
+	fx_stringstream *cmd_tmp;
+	fx_process *cmd_proc;
+	struct bshell_value_writer cmd_writer;
+	bool cmd_writer_init;
+};
+
+static void init(fx_object *obj, void *priv)
+{
+	struct bshell_native_command_p *cmd_p = priv;
+	cmd_p->cmd_tmp = fx_stringstream_create();
+}
+
+static void fini(fx_object *obj, void *priv)
+{
+	struct bshell_native_command_p *cmd_p = priv;
+	fx_stringstream_unref(cmd_p->cmd_tmp);
+	fx_string_unref(cmd_p->cmd_path);
+}
+
+static enum bshell_status start_process(bshell_native_command *cmd, int flags)
+{
+	struct bshell_native_command_p *cmd_p
+		= fx_object_get_private(cmd, BSHELL_TYPE_NATIVE_COMMAND);
+	fx_stringstream *tmp = fx_stringstream_create();
+	size_t argc = bshell_command_get_arg_count(cmd);
+	char **argv = calloc(argc, sizeof *argv);
+
+	for (size_t i = 0; i < argc; i++) {
+		const fx_value *arg = bshell_command_get_arg(cmd, i);
+
+		fx_stringstream_reset(tmp);
+		fx_value_to_string(arg, tmp, NULL);
+		argv[i] = fx_stringstream_steal(tmp);
+	}
+	fx_stringstream_unref(tmp);
+
+	fx_process *self = fx_process_get_self();
+
+	fx_process_start_info info = {
+		.proc_args = (const char **)argv,
+		.proc_args_count = argc,
+		.proc_file_name = fx_string_get_cstr(cmd_p->cmd_path),
+		.proc_environment = fx_process_get_environment(self),
+	};
+
+	if (flags & F_REDIRECT_STDIN) {
+		info.proc_redirect_stdin = true;
+	}
+
+	if (flags & F_REDIRECT_STDOUT) {
+		info.proc_redirect_stdout = true;
+	}
+
+	cmd_p->cmd_flags = flags;
+	cmd_p->cmd_proc = fx_process_create(&info);
+
+	fx_status status = fx_process_start(cmd_p->cmd_proc);
+	for (size_t i = 0; i < argc; i++) {
+		free(argv[i]);
+	}
+	free(argv);
+
+	if (!FX_OK(status)) {
+		return BSHELL_ERR_NO_MEMORY;
+	}
+
+	return BSHELL_SUCCESS;
+}
+
+static enum bshell_status begin_processing(
+	bshell_command *cmd,
+	enum bshell_command_position position)
+{
+	struct bshell_native_command_p *cmd_p
+		= fx_object_get_private(cmd, BSHELL_TYPE_NATIVE_COMMAND);
+	printf("begin processing '%s'\n", fx_string_get_cstr(cmd_p->cmd_path));
+	int flags = 0;
+	switch (position) {
+	case BSHELL_COMMAND_POSITION_BEGINNING:
+		flags = F_REDIRECT_STDOUT;
+		break;
+	case BSHELL_COMMAND_POSITION_MIDDLE:
+		flags = F_REDIRECT_STDIN | F_REDIRECT_STDOUT;
+		break;
+	case BSHELL_COMMAND_POSITION_END:
+		flags = F_REDIRECT_STDIN;
+		break;
+	default:
+		break;
+	}
+
+	return start_process(cmd, flags);
+}
+
+static enum bshell_status process_record(
+	bshell_command *cmd,
+	bshell_pipeline *pipeline,
+	struct bshell_runtime *rt)
+{
+	struct bshell_native_command_p *cmd_p
+		= fx_object_get_private(cmd, BSHELL_TYPE_NATIVE_COMMAND);
+	printf("process record '%s'\n", fx_string_get_cstr(cmd_p->cmd_path));
+
+	if (cmd_p->cmd_flags & F_REDIRECT_STDIN) {
+		fx_value in = bshell_pipeline_read_value(pipeline);
+		if (!fx_value_is_set(&in)) {
+			return BSHELL_SUCCESS;
+		}
+
+		fx_stream *in_stream = fx_process_get_stdin(cmd_p->cmd_proc);
+		if (!cmd_p->cmd_writer_init) {
+			bshell_value_writer_init(&cmd_p->cmd_writer, in_stream);
+			cmd_p->cmd_writer_init = true;
+		}
+
+		bshell_value_writer_write(&cmd_p->cmd_writer, &in);
+		fx_value_unset(&in);
+	}
+
+	if (cmd_p->cmd_flags & F_REDIRECT_STDOUT) {
+		fx_stream *out_stream = fx_process_get_stdout(cmd_p->cmd_proc);
+		fx_stringstream_reset(cmd_p->cmd_tmp);
+		fx_status status
+			= fx_stream_read_line_s(out_stream, cmd_p->cmd_tmp);
+		if (!FX_OK(status)) {
+			/* no more data available */
+			return BSHELL_SUCCESS;
+		}
+
+		fx_string *record = fx_string_create_from_cstr(
+			fx_stringstream_ptr(cmd_p->cmd_tmp));
+		bshell_pipeline_write_value(
+			pipeline,
+			FX_VALUE_OBJECT(record),
+			false);
+		fx_string_unref(record);
+	}
+
+	return BSHELL_SUCCESS;
+}
+
+static enum bshell_status end_processing(bshell_command *cmd)
+{
+	struct bshell_native_command_p *cmd_p
+		= fx_object_get_private(cmd, BSHELL_TYPE_NATIVE_COMMAND);
+	printf("end processing '%s'\n", fx_string_get_cstr(cmd_p->cmd_path));
+	if (cmd_p->cmd_writer_init) {
+		bshell_value_writer_cleanup(&cmd_p->cmd_writer);
+		cmd_p->cmd_writer_init = false;
+	}
+
+	if (cmd_p->cmd_proc) {
+		fx_process_close_stdin(cmd_p->cmd_proc);
+		fx_process_close_stdout(cmd_p->cmd_proc);
+		fx_process_close_stderr(cmd_p->cmd_proc);
+
+		int result = 0;
+		fx_process_wait(cmd_p->cmd_proc, &result);
+		fx_process_unref(cmd_p->cmd_proc);
+		cmd_p->cmd_proc = NULL;
+	}
+
+	return BSHELL_SUCCESS;
+}
+
+static enum bshell_status get_callable_name(
+	const bshell_native_command *cmd,
+	fx_string *out)
+{
+	struct bshell_native_command_p *cmd_p
+		= fx_object_get_private(cmd, BSHELL_TYPE_NATIVE_COMMAND);
+	fx_string_append_s(out, cmd_p->cmd_path);
+	return BSHELL_SUCCESS;
+}
+
+bshell_native_command *bshell_native_command_create(const char *path)
+{
+	bshell_native_command *out
+		= fx_object_create(BSHELL_TYPE_NATIVE_COMMAND);
+	if (!out) {
+		return NULL;
+	}
+
+	struct bshell_native_command_p *cmd
+		= fx_object_get_private(out, BSHELL_TYPE_NATIVE_COMMAND);
+	cmd->cmd_path = fx_string_create_from_cstr(path);
+
+	return out;
+}
+
+FX_TYPE_CLASS_BEGIN(bshell_native_command)
+	FX_TYPE_VTABLE_INTERFACE_BEGIN(fx_object, FX_TYPE_OBJECT)
+		FX_INTERFACE_ENTRY(to_string) = NULL;
+	FX_TYPE_VTABLE_INTERFACE_END(fx_object, FX_TYPE_OBJECT)
+
+	FX_TYPE_VTABLE_INTERFACE_BEGIN(bshell_command, BSHELL_TYPE_COMMAND)
+		FX_INTERFACE_ENTRY(c_command_type) = "Native-Command";
+		FX_INTERFACE_ENTRY(c_get_callable_name) = get_callable_name;
+		FX_INTERFACE_ENTRY(c_begin_processing) = begin_processing;
+		FX_INTERFACE_ENTRY(c_process_record) = process_record;
+		FX_INTERFACE_ENTRY(c_end_processing) = end_processing;
+	FX_TYPE_VTABLE_INTERFACE_END(bshell_command, BSHELL_TYPE_COMMAND)
+FX_TYPE_CLASS_END(bshell_native_command)
+
+FX_TYPE_DEFINITION_BEGIN(bshell_native_command)
+	FX_TYPE_ID(0x720ede87, 0xe586, 0x495a, 0xa229, 0x1505c01b5714);
+	FX_TYPE_FLAGS(FX_TYPE_F_ABSTRACT);
+	FX_TYPE_NAME("bshell.runtime.native_command");
+	FX_TYPE_EXTENDS(BSHELL_TYPE_COMMAND);
+	FX_TYPE_CLASS(bshell_native_command_class);
+	FX_TYPE_INSTANCE_INIT(init);
+	FX_TYPE_INSTANCE_FINI(fini);
+	FX_TYPE_INSTANCE_PRIVATE(struct bshell_native_command_p);
+FX_TYPE_DEFINITION_END(bshell_native_command)

bshell.runtime/compile/command.c

@@ -6,7 +6,10 @@ enum bshell_status cmdcall_load(
 {
 	struct bshell_cmdcall_ast_node *cmdcall;
 	cmdcall = (struct bshell_cmdcall_ast_node *)value->v_node;
-	bshell_scriptblock_push_instruction(ctx->c_block, BSHELL_OPCODE_PEXEC, 1);
+	bshell_scriptblock_push_instruction(
+		ctx->c_block,
+		BSHELL_OPCODE_PEXEC,
+		1);
 	return BSHELL_SUCCESS;
 }
 

bshell.runtime/format/format.c

@@ -21,17 +21,10 @@ static void format_value_fallback(const fx_value *value, fx_stream *dest)
 
 enum bshell_status format_value_default(const fx_value *value, fx_stream *dest)
 {
-	if (fx_type_is_value_type(value->v_type)) {
-		format_value_fallback(value, dest);
-		return BSHELL_SUCCESS;
-	}
-
-	fx_object *object = NULL;
-	fx_value_get_object(value, &object);
-	enum bshell_status status = format_object_table(object, dest);
-	if (status != BSHELL_SUCCESS) {
-		format_value_fallback(value, dest);
-	}
+	struct bshell_value_writer writer;
+	bshell_value_writer_init(&writer, dest);
+	bshell_value_writer_write(&writer, value);
+	bshell_value_writer_cleanup(&writer);
 
 	return BSHELL_SUCCESS;
 }

bshell.runtime/format/value-writer.c

@@ -0,0 +1,85 @@
+#include <bshell/format.h>
+#include <fx/collections/array.h>
+#include <fx/string.h>
+#include <fx/type.h>
+#include <fx/value-type.h>
+
+static void initialise_table(
+	struct bshell_value_writer *w,
+	const fx_value *first_record)
+{
+	bshell_table_ctx_init(&w->w_table_ctx, w->w_dest);
+	const fx_type *ty = fx_type_get_by_id(first_record->v_type);
+	bshell_table_ctx_prepare_columns_from_format(&w->w_table_ctx, ty, NULL);
+	bshell_table_ctx_print_headers(&w->w_table_ctx);
+	w->w_table_initialised = true;
+}
+
+static void write_iterable(struct bshell_value_writer *w, const fx_value *value)
+{
+	fx_array *array = NULL;
+	fx_value_get_object(value, &array);
+
+	const fx_iterator *it = fx_iterator_begin(array);
+	fx_foreach(v, it)
+	{
+		bshell_value_writer_write(w, v);
+	}
+	fx_iterator_unref(it);
+}
+
+static void write_string(struct bshell_value_writer *w, const fx_value *value)
+{
+	const char *str = NULL;
+	fx_value_get_cstr(value, &str);
+	fx_stream_write_cstr(w->w_dest, str, NULL);
+	fx_stream_write_char(w->w_dest, '\n');
+}
+
+static void write_value(struct bshell_value_writer *w, const fx_value *value)
+{
+	const fx_type *ty = fx_type_get_by_id(value->v_type);
+	if (fx_value_is_type(value, FX_TYPE_STRING)) {
+		write_string(w, value);
+		return;
+	}
+
+	if (fx_type_get_interface(ty, FX_TYPE_ITERABLE)) {
+		write_iterable(w, value);
+		return;
+	}
+
+	if (fx_type_is_value_type(value->v_type)) {
+		fx_value_to_string(value, w->w_dest, NULL);
+		fx_stream_write_char(w->w_dest, '\n');
+		return;
+	}
+
+	if (!w->w_table_initialised) {
+		initialise_table(w, value);
+	}
+
+	bshell_table_ctx_print_record(&w->w_table_ctx, value);
+}
+
+void bshell_value_writer_init(struct bshell_value_writer *w, fx_stream *dest)
+{
+	memset(w, 0x00, sizeof *w);
+	w->w_dest = dest;
+}
+
+void bshell_value_writer_write(
+	struct bshell_value_writer *w,
+	const fx_value *value)
+{
+	write_value(w, value);
+}
+
+void bshell_value_writer_cleanup(struct bshell_value_writer *w)
+{
+	if (w->w_table_initialised) {
+		bshell_table_ctx_cleanup(&w->w_table_ctx);
+	}
+
+	w->w_table_initialised = false;
+}

bshell.runtime/include/bshell/command/command.h

@@ -8,6 +8,13 @@
 
 FX_DECLS_BEGIN;
 
+enum bshell_command_position {
+	BSHELL_COMMAND_POSITION_SINGLE = 0,
+	BSHELL_COMMAND_POSITION_BEGINNING,
+	BSHELL_COMMAND_POSITION_MIDDLE,
+	BSHELL_COMMAND_POSITION_END,
+};
+
 struct bshell_runtime;
 
 #define BSHELL_TYPE_COMMAND (bshell_command_get_type())
@@ -24,7 +31,9 @@ FX_TYPE_CLASS_DECLARATION_BEGIN(bshell_command)
 		*c_get_description)(const bshell_command *, fx_string *);
 	enum bshell_status (
 		*c_get_description_static)(const fx_type *, fx_string *);
-	enum bshell_status (*c_begin_processing)(bshell_command *);
+	enum bshell_status (*c_begin_processing)(
+		bshell_command *,
+		enum bshell_command_position);
 	enum bshell_status (*c_process_record)(
 		bshell_command *,
 		FX_TYPE_FWDREF(bshell_pipeline) * pipeline,
@@ -47,9 +56,11 @@ extern void bshell_command_set_args_reverse(
 extern const fx_value *bshell_command_get_arg(
 	bshell_command *cmd,
 	size_t index);
+extern size_t bshell_command_get_arg_count(const bshell_command *cmd);
 
 extern enum bshell_status bshell_command_begin_processing(
-	bshell_command *command);
+	bshell_command *command,
+	enum bshell_command_position position);
 extern enum bshell_status bshell_command_process_record(
 	bshell_command *command,
 	FX_TYPE_FWDREF(bshell_pipeline) * pipeline,

bshell.runtime/include/bshell/command/native-command.h

@@ -0,0 +1,23 @@
+#ifndef BSHELL_COMMAND_NATIVE_COMMAND_H_
+#define BSHELL_COMMAND_NATIVE_COMMAND_H_
+
+#include <fx/macros.h>
+
+FX_DECLS_BEGIN;
+
+struct bshell_runtime;
+
+#define BSHELL_TYPE_NATIVE_COMMAND (bshell_native_command_get_type())
+
+FX_DECLARE_TYPE(bshell_native_command);
+
+FX_TYPE_CLASS_DECLARATION_BEGIN(bshell_native_command)
+FX_TYPE_CLASS_DECLARATION_END(bshell_native_command)
+
+extern fx_type_id bshell_native_command_get_type(void);
+
+extern bshell_native_command *bshell_native_command_create(const char *path);
+
+FX_DECLS_END;
+
+#endif

bshell.runtime/include/bshell/format.h

@@ -47,6 +47,12 @@ struct bshell_table_ctx {
 	fx_stream *ctx_out;
 };
 
+struct bshell_value_writer {
+	struct bshell_table_ctx w_table_ctx;
+	bool w_table_initialised;
+	fx_stream *w_dest;
+};
+
 extern enum bshell_status bshell_table_init(void);
 extern const struct bshell_table *bshell_table_get_for_type(const fx_type *ty);
 extern enum bshell_status format_object_table(
@@ -74,4 +80,12 @@ extern enum bshell_status bshell_table_ctx_print_record(
 	struct bshell_table_ctx *ctx,
 	const fx_value *record);
 
+extern void bshell_value_writer_init(
+	struct bshell_value_writer *w,
+	fx_stream *dest);
+extern void bshell_value_writer_write(
+	struct bshell_value_writer *w,
+	const fx_value *value);
+extern void bshell_value_writer_cleanup(struct bshell_value_writer *w);
+
 #endif

bshell.runtime/include/bshell/runtime/cmdcall.h

@@ -8,6 +8,14 @@ FX_DECLS_BEGIN;
 
 struct bshell_runtime;
 
+enum bshell_command_position;
+
+enum bshell_cmdcall_type {
+	BSHELL_CMDCALL_NONE = 0,
+	BSHELL_CMDCALL_CMDLET,
+	BSHELL_CMDCALL_NATIVE,
+};
+
 #define BSHELL_TYPE_CMDCALL (bshell_cmdcall_get_type())
 
 FX_DECLARE_TYPE(bshell_cmdcall);
@@ -19,6 +27,9 @@ extern fx_type_id bshell_cmdcall_get_type(void);
 
 FX_TYPE_DEFAULT_CONSTRUCTOR(bshell_cmdcall, BSHELL_TYPE_CMDCALL);
 
+extern enum bshell_cmdcall_type bshell_cmdcall_get_target_type(
+	const bshell_cmdcall *cmdcall);
+
 extern enum bshell_status bshell_cmdcall_push_arg(
 	bshell_cmdcall *cmdcall,
 	fx_value arg);
@@ -29,7 +40,8 @@ extern enum bshell_status bshell_cmdcall_resolve(
 extern enum bshell_status bshell_cmdcall_process_record(
 	bshell_cmdcall *cmdcall,
 	FX_TYPE_FWDREF(bshell_pipeline) * pipeline,
-	struct bshell_runtime *rt);
+	struct bshell_runtime *rt,
+	enum bshell_command_position position);
 
 FX_DECLS_END;
 

bshell.runtime/include/bshell/runtime/runtime.h

@@ -3,6 +3,7 @@
 
 #include <bshell/command/command.h>
 #include <bshell/command/function.h>
+#include <bshell/format.h>
 #include <bshell/runtime/script-block.h>
 #include <bshell/runtime/var.h>
 #include <fx/collections/hashtable.h>
@@ -15,6 +16,7 @@ struct bshell_runtime {
 	struct bshell_runtime_scope *rt_global;
 	fx_hashtable *rt_aliases;
 	fx_queue rt_scope;
+	struct bshell_value_writer rt_writer;
 };
 
 extern struct bshell_runtime *bshell_runtime_create(void);
@@ -53,4 +55,10 @@ extern struct bshell_runtime_scope *bshell_runtime_get_parent_scope(
 	struct bshell_runtime *rt,
 	struct bshell_runtime_scope *scope);
 
+extern void bshell_runtime_begin_output(struct bshell_runtime *rt);
+extern void bshell_runtime_output_value(
+	struct bshell_runtime *rt,
+	const fx_value *value);
+extern void bshell_runtime_end_output(struct bshell_runtime *rt);
+
 #endif

bshell.runtime/runtime/cmdcall.c

@@ -1,10 +1,14 @@
 #include <bshell/command/alias.h>
 #include <bshell/command/command.h>
+#include <bshell/command/native-command.h>
 #include <bshell/runtime/cmdcall.h>
 #include <bshell/runtime/pipeline.h>
 #include <bshell/runtime/runtime.h>
 #include <bshell/status.h>
 #include <fx/collections/array.h>
+#include <fx/collections/hashtable.h>
+#include <fx/diagnostics/process.h>
+#include <fx/io/path.h>
 #include <fx/reflection/assembly.h>
 #include <fx/reflection/function.h>
 #include <fx/reflection/type.h>
@@ -195,14 +199,15 @@ static enum bshell_status cmdcall_execute(struct bshell_cmdcall_p *cmdcall)
 static enum bshell_status cmdcall_process_record(
 	struct bshell_cmdcall_p *cmdcall,
 	bshell_pipeline *pipeline,
-	struct bshell_runtime *rt)
+	struct bshell_runtime *rt,
+	enum bshell_command_position position)
 {
 	if (!cmdcall->cmd_target) {
 		return BSHELL_ERR_NOT_SUPPORTED;
 	}
 
 	if (!cmdcall->cmd_initialised) {
-		bshell_command_begin_processing(cmdcall->cmd_target);
+		bshell_command_begin_processing(cmdcall->cmd_target, position);
 		cmdcall->cmd_initialised = true;
 	}
 
@@ -231,25 +236,19 @@ enum bshell_status bshell_cmdcall_resolve(
 		rt);
 }
 
-enum bshell_status bshell_cmdcall_execute(bshell_cmdcall *cmdcall)
-{
-	FX_CLASS_DISPATCH_STATIC_0(
-		BSHELL_TYPE_CMDCALL,
-		cmdcall_execute,
-		cmdcall);
-}
-
 enum bshell_status bshell_cmdcall_process_record(
 	bshell_cmdcall *cmdcall,
 	bshell_pipeline *pipeline,
-	struct bshell_runtime *rt)
+	struct bshell_runtime *rt,
+	enum bshell_command_position position)
 {
 	FX_CLASS_DISPATCH_STATIC(
 		BSHELL_TYPE_CMDCALL,
 		cmdcall_process_record,
 		cmdcall,
 		pipeline,
-		rt);
+		rt,
+		position);
 }
 
 FX_TYPE_CLASS_BEGIN(bshell_cmdcall)

bshell.runtime/runtime/eval.c

@@ -353,10 +353,8 @@ static enum bshell_status eval_instruction(
 		}
 
 		int end_of_data = 0;
-		bool columns_initialised = false;
 		fx_value record = FX_VALUE_EMPTY;
-		struct bshell_table_ctx table_ctx;
-		bshell_table_ctx_init(&table_ctx, fx_stdout);
+		bshell_runtime_begin_output(rt);
 		while (1) {
 			bstatus = bshell_pipeline_pump_record(
 				pipeline,
@@ -371,22 +369,11 @@ static enum bshell_status eval_instruction(
 				continue;
 			}
 
-			if (!columns_initialised) {
-				const fx_type *ty
-					= fx_type_get_by_id(record.v_type);
-				bshell_table_ctx_prepare_columns_from_format(
-					&table_ctx,
-					ty,
-					NULL);
-				bshell_table_ctx_print_headers(&table_ctx);
-				columns_initialised = true;
-			}
-
-			bshell_table_ctx_print_record(&table_ctx, &record);
+			bshell_runtime_output_value(rt, &record);
 			fx_value_unset(&record);
 		}
 
-		bshell_table_ctx_cleanup(&table_ctx);
+		bshell_runtime_end_output(rt);
 		bshell_pipeline_unref(pipeline);
 		break;
 	}

bshell.runtime/runtime/output.c

@@ -0,0 +1,20 @@
+#include <bshell/runtime/runtime.h>
+#include <fx/type.h>
+#include <fx/value-type.h>
+
+void bshell_runtime_begin_output(struct bshell_runtime *rt)
+{
+	bshell_value_writer_init(&rt->rt_writer, fx_stdout);
+}
+
+void bshell_runtime_output_value(
+	struct bshell_runtime *rt,
+	const fx_value *value)
+{
+	bshell_value_writer_write(&rt->rt_writer, value);
+}
+
+void bshell_runtime_end_output(struct bshell_runtime *rt)
+{
+	bshell_value_writer_cleanup(&rt->rt_writer);
+}

bshell.runtime/runtime/pipeline.c

@@ -7,6 +7,7 @@
 #include <fx/vector.h>
 
 struct bshell_pipeline_p {
+	bool p_input_values_provided;
 	bshell_pipeline *p_self;
 	fx_array *p_in, *p_out;
 	FX_VECTOR_DECLARE(bshell_cmdcall *, p_cmds);
@@ -72,6 +73,7 @@ static enum bshell_status pipeline_add_input_value(
 	fx_value value,
 	bool enumerate)
 {
+	pipeline->p_input_values_provided = true;
 	return write_value(pipeline, pipeline->p_in, value, enumerate);
 }
 
@@ -118,10 +120,26 @@ static enum bshell_status pipeline_pump_record(
 
 	size_t i = 0;
 	for (i = 0; i < pipeline->p_cmds.count;) {
+		enum bshell_command_position position;
+		if (pipeline->p_cmds.count == 1) {
+			position = pipeline->p_input_values_provided
+			                 ? BSHELL_COMMAND_POSITION_END
+			                 : BSHELL_COMMAND_POSITION_SINGLE;
+		} else if (i == 0) {
+			position = pipeline->p_input_values_provided
+			                 ? BSHELL_COMMAND_POSITION_END
+			                 : BSHELL_COMMAND_POSITION_BEGINNING;
+		} else if (i == pipeline->p_cmds.count - 1) {
+			position = BSHELL_COMMAND_POSITION_END;
+		} else {
+			position = BSHELL_COMMAND_POSITION_MIDDLE;
+		}
+
 		status = bshell_cmdcall_process_record(
 			pipeline->p_cmds.items[i],
 			pipeline->p_self,
-			rt);
+			rt,
+			position);
 
 		if (status != BSHELL_SUCCESS) {
 			break;