Bazel BUILD Files
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External
Internal
Overview
A BUILD is a short program, an interpretable list of Starlark statements. It can be named BUILD or BUILD.bazel and where both exist, BUILD.bazel takes precedence.
General Syntax
Variables must be defined before they are used.
The relative order in which build rules are declared is unimportant.
The file cannot contain function definitions, for or if control statements. List comprehensions and if expressions are allowed.
Build Rules
When a build rule function is executed, it creates a new target in the graph, which can later referred using a label.