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Cmake variables12/30/2023 ![]() In that case, I recommend using the “–trace” command line argument to cmake. Sometimes, you already know exactly what variables you’re dealing with, but you just don’t understand how it’s getting set to the value that it ends up with. Most recommend a set of documented variables that are intended for public use. Be sure to check the documentation for the package or find module, too. Whether or not a variable exists may be based on some conditional block of code. Of course, this is a bit of a reverse-engineering technique, and the author of the project config file or the find module may think of some of his or her variables as “internal use only.” Use any information you learn from this technique wisely: understand that CMake has an IF command, and some things happen conditionally. It includes all your variables, and all of the built-in/pre-defined CMake variables, and all of the ones defined by package config files that you’ve included, too… You may be surprised at the number of CMake variables that are defined, especially if you have a pretty small or simple CMakeLists for your project.įor example, you could call this function after a call to find_package to see what variables are available after the package is found. Put this function in your CMakeLists.txt file and then call the function to see what it looks like. ![]() Although, in some contexts, you may need to use the message calls without the STATUS arg, because STATUS messages do not show up in the output stream. This little function can be used in a CMakeLists.txt file, or in a CMake -P script, or in a ctest -S script, or in a find module, or even in a script file run at CPack time. Straight to the point: here’s a function that lists all the CMake variables that are currently defined, along with their values: ![]() Supports the same values as the Docker CLI -mount flag.WARNING: Techn-ish blog post, DO NOT READ if you’re allergic to any scripting languages. Overrides the default local mount point for the workspace when the container is created. You can learn more about formatting string vs array properties. Note that the array syntax will execute the command without a shell. Learn more about publishing vs forwarding ports here. This property accepts a port or array of ports that should be published locally when the container is running.Unlike forwardPorts, your application may need to listen on all interfaces ( 0.0.0.0) not just localhost for it to be available externally. In most cases, we recommend using the new forwardPorts property. Cached image identifiers are passed to the docker build command with -cache-from. "portsAttributes": Ī string or array of strings that specify one or more images to use as caches when building the image. See port attributes for available options. Object that maps a port number, "host:port" value, range, or regular expression to a set of default options. The property is most useful for forwarding ports that cannot be auto-forwarded because the related process that starts before the devcontainer.json supporting service / tool connects or for forwarding a service not in the primary container in Docker Compose scenarios (e.g. ) that should always be forwarded from inside the primary container to the local machine (including on the web). General devcontainer.json properties PropertyĪ name for the dev container displayed in the UI.Īn array of port numbers or "host:port" values (e.g. This label can contain an array of json snippets that will be automatically merged with devcontainer.json contents (if any) when a container is created. Metadata properties marked with a □️️ can be stored in the tadata container image label in addition to devcontainer.json. It can be used by tools and services that support the dev container spec to create a development environment that contains one or more development containers. The devcontainer.json file contains any needed metadata and settings required to configurate a development container for a given well-defined tool and runtime stack.
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