buildxml

BuildXML is a term used to describe a style of declaring build configurations in XML. It provides a structured, machine-readable representation of a build process, including sources, dependencies, tasks, and artifacts. Projects are described in a single XML file that can be stored in a repository and consumed by a build engine. The approach emphasizes readability, portability across platforms, and the ability to validate configurations against a schema.

Structure and syntax

A typical BuildXML document centers on a top-level project element. Common child elements include property, target, and task. Property elements define reusable values such as source directories or version numbers. Target elements represent stages in the build, with attributes like name and depends to express prerequisites. Task elements describe concrete operations such as compile, test, or package, with attributes specifying parameters, inputs, and outputs. The optional defaultTarget attribute on the project element designates the starting point when no target is specified on invocation.

Execution model

The build engine parses the XML, constructs a directed dependency graph from targets, and executes them in order, respecting dependencies. Incremental builds may compare timestamps or checksums to determine what needs recompilation. Independent targets can be run in parallel, subject to engine capabilities and tooling constraints. Error handling and logging are typically defined in dedicated task configurations or through global properties.

Extensibility and tooling

Custom tasks can be implemented in the host language and registered with the engine, enabling bespoke operations. Tooling support often includes XML schema validation, editor syntax highlighting, and project import/export in integrated development environments.

Context and usage

BuildXML is used in environments requiring explicit, auditable build definitions and strong validation. It complements other build approaches by offering a standardized, XML-based descriptor that can be versioned alongside source code. See also: XML-based build tools, Ant, Maven.