27 lines
2.1 KiB
Markdown
27 lines
2.1 KiB
Markdown
# Project Instructions
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## Source Dependencies
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- Do not download or initialize Git submodules during source builds unless an explicit exception is listed below.
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- Rely on the default non-recursive behavior of `git clone`; do not add submodule initialization or update steps.
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- Declare and pin every source dependency version in the `Dockerfile` or another tracked project file.
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- Do not use floating branches, unversioned archives, or implicit dependency downloads.
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- Add each dependency as a separate, reviewable build step so its source and version remain visible.
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- Append new dependency build steps after all existing dependency build steps. Do not insert or reorder steps in the existing build sequence, so previously successful build layers remain unchanged.
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- The log4cplus build is allowed to fetch its required `ThreadPool` submodule as a shallow repository pinned by `REL_2_0_5` to commit `cc0b6371d3963f7028c2da5fc007733f9f3bf205`. Do not fetch unused log4cplus submodules.
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## System Development Packages
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- Do not install distribution-provided `-dev` packages for third-party libraries.
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- Build third-party development dependencies from source at explicitly pinned versions.
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- System `-dev` packages are allowed only for foundational platform infrastructure, such as glibc and Linux kernel headers.
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- Document any new foundational `-dev` package exception in this file before adding it to the image.
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- On Rocky Linux 9, `glibc-devel`, `kernel-headers`, and `libstdc++-devel` may be installed directly or as compiler dependencies because they are foundational C/C++ platform and toolchain components.
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- On Alpine Linux, `musl-dev` and `linux-headers` may be installed directly or as compiler dependencies because they are foundational C/C++ platform and toolchain components.
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## Meta Libraries
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- Pin all Meta/Facebook ecosystem libraries to the same date-based release tag.
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- The current Meta release tag is `v2026.08.03.00`; use this exact tag for Folly and every subsequently added Meta library.
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- Update the shared Meta release tag only when all Meta libraries in this project can be updated together.
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