Bash completion for flags

CMakeLists.txt

@@ -68,8 +68,11 @@ ign_find_package(ignition-msgs5 REQUIRED)
 set(IGN_MSGS_VER ${ignition-msgs5_VERSION_MAJOR})
 
 #--------------------------------------
-# Find if ign command is available
+# Find if command is available. This is used to enable tests.
+# Note that CLI files are installed regardless of whether the dependency is
+# available during build time
 find_program(HAVE_IGN_TOOLS ign)
+set (IGN_TOOLS_VER 1)
 
 #--------------------------------------
 # Find QT

src/CMakeLists.txt

@@ -46,7 +46,35 @@ ign_build_tests(TYPE UNIT
  LIB_DEPS
  ${IGNITION-MATH_LIBRARIES}
  TINYXML2::TINYXML2
+ TEST_LIST
+ gtest_targets
 )
 
+foreach(test ${gtest_targets})
+ target_compile_definitions(${test} PRIVATE
+ "PROJECT_SOURCE_DIR=\"${PROJECT_SOURCE_DIR}\"")
+endforeach()
+
+if(TARGET UNIT_ign_TEST)
+ # Running `ign gazebo` on macOS has problems when run with /usr/bin/ruby
+ # due to System Integrity Protection (SIP). Try to find ruby from
+ # homebrew as a workaround.
+ if (APPLE)
+ find_program(BREW_RUBY ruby HINTS /usr/local/opt/ruby/bin)
+ endif()
+
+ target_compile_definitions(UNIT_ign_TEST PRIVATE
+ "BREW_RUBY=\"${BREW_RUBY} \"")
+
+ target_compile_definitions(UNIT_ign_TEST PRIVATE
+ "IGN_PATH=\"${HAVE_IGN_TOOLS}\"")
+
+ set(_env_vars)
+ list(APPEND _env_vars "IGN_CONFIG_PATH=${CMAKE_BINARY_DIR}/test/conf")
+
+ set_tests_properties(UNIT_ign_TEST PROPERTIES
+ ENVIRONMENT "${_env_vars}")
+endif()
+
 add_subdirectory(cmd)
 add_subdirectory(plugins)

src/cmd/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Generate a the ruby script.
+# Generate the ruby script.
 # Note that the major version of the library is included in the name.
 if (APPLE)
  set(IGN_LIBRARY_NAME lib${PROJECT_NAME_LOWER}.dylib)
@@ -11,3 +11,13 @@ configure_file(
 
 # Install the ruby command line library in an unversioned location.
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/cmdgui${PROJECT_VERSION_MAJOR}.rb DESTINATION lib/ruby/ignition)
+
+# Tack version onto and install the bash completion script
+configure_file(
+ "gui.bash_completion.sh"
+ "${CMAKE_CURRENT_BINARY_DIR}/gui${PROJECT_VERSION_MAJOR}.bash_completion.sh" @ONLY)
+install(
+ FILES
+ ${CMAKE_CURRENT_BINARY_DIR}/gui${PROJECT_VERSION_MAJOR}.bash_completion.sh
+ DESTINATION
+ ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATAROOTDIR}/gz/gz${IGN_TOOLS_VER}.completion.d)

src/cmd/gui.bash_completion.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+#
+# Copyright (C) 2022 Open Source Robotics Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# bash tab-completion
+
+# This is a per-library function definition, used in conjunction with the
+# top-level entry point in ign-tools.
+
+GZ_GUI_COMPLETION_LIST="
+ -l --list
+ -s --standalone
+ -c --config
+ -v --verbose
+ -h --help
+ --force-version
+ --versions
+"
+
+function _gz_gui
+{
+ if [[ ${COMP_WORDS[COMP_CWORD]} == -* ]]; then
+ # Specify options (-*) word list for this subcommand
+ COMPREPLY=($(compgen -W "$GZ_GUI_COMPLETION_LIST" \
+ -- "${COMP_WORDS[COMP_CWORD]}" ))
+ return
+ else
+ # Just use bash default auto-complete, because we never have two
+ # subcommands in the same line. If that is ever needed, change here to
+ # detect subsequent subcommands
+ COMPREPLY=($(compgen -o default -- "${COMP_WORDS[COMP_CWORD]}"))
+ return
+ fi
+}
+
+function _gz_gui_flags
+{
+ for word in $GZ_GUI_COMPLETION_LIST; do
+ echo "$word"
+ done
+}

src/ign_TEST.cc

@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include <fstream>
 #include <string>
 
 #include <ignition/common/Filesystem.hh>
@@ -32,6 +33,9 @@
 # define pclose _pclose
 #endif
 
+static const std::string kIgnCommand(
+ std::string(BREW_RUBY) + std::string(IGN_PATH));
+
 /////////////////////////////////////////////////
 std::string custom_exec_str(std::string _cmd)
 {
@@ -97,3 +101,33 @@ TEST_F(CmdLine, DETAIL_IGN_UTILS_ADD_DISABLED_PREFIX(list))
  EXPECT_TRUE(common::exists(common::joinPaths(this->kFakeHome, ".ignition",
  "gui")));
 }
+
+//////////////////////////////////////////////////
+/// \brief Check --help message and bash completion script for consistent flags
+TEST(ignTest, GuiHelpVsCompletionFlags)
+{
+ // Flags in help message
+ std::string helpOutput = custom_exec_str(kIgnCommand + " gui --help");
+
+ // Call the output function in the bash completion script
+ std::string scriptPath = common::joinPaths(std::string(PROJECT_SOURCE_DIR),
+ "src", "cmd", "gui.bash_completion.sh");
+
+ // Equivalent to:
+ // sh -c "bash -c \". /path/to/gui.bash_completion.sh; _gz_gui_flags\""
+ std::string cmd = "bash -c \". " + scriptPath + "; _gz_gui_flags\"";
+ std::string scriptOutput = custom_exec_str(cmd);
+
+ // Tokenize script output
+ std::istringstream iss(scriptOutput);
+ std::vector<std::string> flags((std::istream_iterator<std::string>(iss)),
+ std::istream_iterator<std::string>());
+
+ EXPECT_GT(flags.size(), 0u);
+
+ // Match each flag in script output with help message
+ for (std::string flag : flags)
+ {
+ EXPECT_NE(std::string::npos, helpOutput.find(flag)) << helpOutput;
+ }
+}