colcon命令的编译清除方法是什么？

凌云

请问，colcon命令有相关的清除指令吗，像catkin_make那样加clean没有用。或者ROS2有什么新的编译清除方法？

小鱼

@凌云肯定有的，colcon是插件式的，每个人都可以开发插件，colcon clean插件如下

https://github.com/ruffsl/colcon-clean

Quick start

Setup, build and test an example colcon workspace:

mkdir -p ~/ws/src && cd ~/ws
wget https://raw.githubusercontent.com/colcon/colcon.readthedocs.org/main/colcon.repos
vcs import src < colcon.repos
colcon build
colcon test

Clean build and install paths for select packages:

colcon clean packages \
    --base-select \
        build \
        install \
    --packages-select \
        colcon-cmake \
        colcon-package-information

Clean gcov count data files for entire workspace:

colcon clean workspace \
    --base-select \
        build \
    --clean-match \
      "*.gcda"

Subverbs

`workspace` - Clean paths for workspace

The workspace subverb provides a means to globally clean the top level base paths for the entire workspace.

`packages` - Clean paths for packages

The packages subverb provides a means to locally clean the package level base paths using package selection.

Clean subverb arguments

By default, this extension will provide an interactive confirmation prompt with a printout of files to be deleted. This dialogue can be automatically skipped; these deletion events can still be observed via the command's resulting colcon log file.

-y, --yes
- Automatic yes to prompts

Base handler arguments

Additional arguments supported by all subverbs provide the option to select which base paths to clean, where they may be relocated:

--base-select
- Select base names to clean in workspace (default: [build, install, log, test_result])
--build-base
- The base path for all build directories (default: build)
--install-base
- The base path for all install directories (default: install)
--log-base
- The base path for all log directories (default: log)
--test-result-base
- The base path for all test_result directories (default: build)

Clean filter arguments

Specify what files and directories to include. All files and directories (including symbolic links) are included by default. The --clean-match/--clean-ignore arguments allows for selection using glob/wildcard (".gitignore style") path matching. Paths relative to the root directory (i.e. excluding the name of the root directory itself) are matched against the provided patterns. For example, to only include Gcov Data files, use: colcon clean workspace --clean-match "*.gcda" or to exclude hidden files and directories use: colcon clean workspace --clean-ignore ".*" ".*/" which is short for colcon clean workspace --clean-match "*" "!.*" "!.*/".

--clean-match
- One or several patterns for paths to include. NOTE: patterns with an asterisk must be in quotes ("*") or the asterisk preceded by an escape character (*).
--clean-ignore
- One or several patterns for paths to exclude. NOTE: patterns with an asterisk must be in quotes ("*") or the asterisk preceded by an escape character (*).
--clean-no-linked-dirs
- Do not include symbolic links to other directories.
--clean-no-linked-files
- Do not include symbolic links to files.

Extension points

This extension makes use of a number of colcon-core extension points for registering verbs, subverbs with colcon CLI. This extension also provides it's own extension points to support additional cleaning strategies.

`BaseHandlerExtensionPoint`

This extension point determines the types of base paths that may be selected for cleaning. Default base handler extensions provided include:

build
- Note: by default this extension does not follow symlinks
install
- Note: by default this extension does not follow symlinks
log
- Note: logs are stored by time, so package selection is not applicable
test_result
- Note: by default colcon uses build path to store test results

凌云

非常感谢。刚刚我手动删除了install和build文件夹，结果在后续colcon build的时候，出现了一些warning：

[1.065s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/ling/ros2_ws/install/cpp_pubsub' in the environment variable AMENT_PREFIX_PATH doesn't exist
[1.066s] WARNING:colcon.colcon_ros.prefix_path.catkin:The path '/home/ling/ros2_ws/install/gmc' in the environment variable CMAKE_PREFIX_PATH doesn't exist
[1.066s] WARNING:colcon.colcon_ros.prefix_path.catkin:The path '/home/ling/ros2_ws/install/cpp_pubsub' in the environment variable CMAKE_PREFIX_PATH doesn't exist

请问这种警告该如何修复？

小鱼

@凌云 unset一下变量或者，关闭终端重新进入即可

凌云

@小鱼已解决，谢谢。