vgphire.blogg.se - Dependency graph in compiler design

An optional flag, boolean, defaults to false.

A scope: compile (the default), runtime, provided, test, or system.

It is defined by a dependency element in that version's pom.xml. For our purposes all projects areĪ dependency belongs to a specific version of a project. However this is a compile time only distinction. Projects may contain subprojects called modules that are built at the same time. Projects also have various other metadata such as organization, copyright, issue tracker URL, developers, and more that we do not need to consider or model.

However a project can use different classifiers and packaging types to produce multiple artifacts. It contains zero or more dependencies of the project, each of which is identified by a dependency element in the dependencies section of the pom.xml file. It has a single group ID, artifact ID, and version. Most projects have more than one version and many projects have more than one artifact in each version.Įach version of a project is defined in a pom.xml file. A Maven artifact belongs to the project that has same group ID and artifact ID that the artifact has. Maven ProjectsĪ Maven project is identified by a group ID and an artifact ID. There is no guarantee that an artifact identified by syntactically correct Maven coordinates can be located or exists in any particular repositories. Furthermore the classifier and packaging have the default values of the empty string and "jar" respectively if they're omitted. Two strings that are character by character identical identify the same artifact. Maven coordinates contain up to five colon separated parts: The exact syntax of the coordinates is defined by the Maven Project's POM reference. Maven coordinates are a colon separated string that uniquely identifies a Maven artifact. TBD: do we even need to consider names here? Maven Coordinates Two artifacts are considered to be the same if they have the same coordinates, even if the name or the bytes have changed.

The notable exception to this is snapshot artifacts. The byte sequence is usually fixed after the artifact is first published. The name is usually derived from the Maven coordinates and is fixed. Two copies of a resource with the same Maven coordinates in two different repositories are the same artifact. Furthermore, the same artifact can exist in many files and many file systems at the same time. However, the absolute and relative paths to the file, the created and modified times of the file, and other file system metadata are not part of the artifact. It is often instantiated as a file or a Web resource. An artifact has a name, coordinates, and a sequence of bytes. An artifact is a resource in the Maven repository system that has Maven coordinates.