tools: Add new tool, hscript-simulate, for simulation of script execution

3 files changed, 78 insertions, 0 deletions

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 4bf5423..5f37892 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -1 +1,2 @@
 add_subdirectory(hscript-validate)
+add_subdirectory(hscript-simulate)
diff --git a/tools/hscript-simulate/CMakeLists.txt b/tools/hscript-simulate/CMakeLists.txt
new file mode 100644
index 0000000..a8dfda8
--- /dev/null
+++ b/tools/hscript-simulate/CMakeLists.txt
@@ -0,0 +1,7 @@
+set(SIMULATOR_SRCS
+        simulator.cc
+)
+add_executable(hscript-simulate ${SIMULATOR_SRCS})
+target_link_libraries(hscript-simulate hscript)
+
+install(TARGETS hscript-simulate DESTINATION bin)
diff --git a/tools/hscript-simulate/simulator.cc b/tools/hscript-simulate/simulator.cc
new file mode 100644
index 0000000..0342894
--- /dev/null
+++ b/tools/hscript-simulate/simulator.cc
@@ -0,0 +1,70 @@
+/*
+ * simulator.cc - Implementation of the HorizonScript simulation utility
+ * Project Horizon
+ *
+ * Copyright (c) 2019 Adélie Linux and contributors.  All rights reserved.
+ * This code is licensed under the AGPL 3.0 license, as noted in the
+ * LICENSE-code file in the root directory of this repository.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+#include <unistd.h>
+#include "hscript/script.hh"
+#include "util/output.hh"
+#include "3rdparty/clipp.h"
+
+bool pretty = false;
+
+int main(int argc, char *argv[]) {
+    const Horizon::Script *my_script;
+    Horizon::ScriptOptions opts;
+    int result_code = EXIT_SUCCESS;
+    std::string installfile;
+    using Horizon::ScriptOptionFlags;
+
+    /* Default to pretty if we are using a TTY, unless -n specified. */
+    if(isatty(1) && isatty(2)) {
+        pretty = true;
+    }
+
+    opts.set(ScriptOptionFlags::Simulate);
+
+    auto cli = (
+                clipp::value("installfile", installfile),
+                clipp::option("-n", "--no-colour").doc("Do not 'prettify' output")(
+                    [] { pretty = false; }
+                ),
+                clipp::option("-s", "--strict").doc("Strict parsing")(
+                    [&opts] { opts.set(ScriptOptionFlags::StrictMode); }
+                )
+    );
+    if(!clipp::parse(argc, argv, cli)) {
+        std::cout << "usage:" << std::endl;
+        std::cout << clipp::usage_lines(cli, "hscript-simulate") << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    bold_if_pretty(std::cout);
+    std::cout << "HorizonScript Simulation Utility version 0.1.0";
+    reset_if_pretty(std::cout);
+    std::cout << std::endl;
+    std::cout << "Copyright (c) 2019 Adélie Linux and contributors.  AGPL-3.0 license." << std::endl;
+    std::cout << std::endl;
+
+    my_script = Horizon::Script::load(installfile, opts);
+    if(my_script == nullptr) {
+        std::cout << "Could not load the specified script." << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    if(!my_script->execute()) {
+        output_error("installfile", "Script failed.  Stop.", "");
+        result_code = EXIT_FAILURE;
+    } else {
+        output_info("installfile", "Script completed.", "");
+    }
+
+    delete my_script;
+    return result_code;
+}