re_build_tools

Part of the rerun family of crates.

Library to be used in build.rs files in order to build the build info defined in re_build_info by setting environment variables.

Some information in re_build_info can be provided through env vars:

• GIT_HASH (the full sha, like e264b9decab9257ae79100a006bb69c0d289e20c)
• GIT_BRANCH (the symbolic-ref --short, like asdf/my-branch)
• DATETIME (ISO8601, like 2025-12-10T15:49:52.089915278Z)

If these are required but not provided, they will be gathered by:

• GIT_HASH: running git rev-parse HEAD
• GIT_BRANCH: running git symbolic-ref --short HEAD
• DATETIME retrieving system time during the build

If you'd like to avoid these for whatever reason, then set them externally.