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build: add Nix flake support for reproducible builds #534

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@patextreme patextreme commented Nov 28, 2025 •
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#528

What was changed and what it is solving

This PR adds support for Nix, a tool that ensures the project builds identically across all machines.

Changes:

  • Added Nix flake configuration (flake.nix and nix/ directory)
  • Created Nix build recipes for mediator application and Docker images
  • Added documentation in nix/README.md

Why:

  • Offers an alternative build path alongside existing SBT builds for Nix infrastructure

The existing SBT build system remains unchanged. Nix support is optional.

How it was tested

  • Built mediator package and Docker images using Nix
  • Tested development environment with nix develop
  • Verified on Linux and macOS
  • Confirmed existing SBT builds are unaffected

Release Notes / Changelog

Add Nix flake support for reproducible builds and development environments

@patextreme patextreme requested a review from a team as a code owner November 28, 2025 05:33
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github-actions bot commented Nov 28, 2025 •
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Integration Test Results

 5 files  ±0   5 suites  ±0   11s ⏱️ -1s
17 tests ±0  17 ✅ ±0  0 💤 ±0  0 ❌ ±0 
20 runs  ±0  20 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 3f74a7e. ± Comparison against base commit 3414298.

♻️ This comment has been updated with latest results.

patextreme and others added 27 commits November 28, 2025 13:31
@patextreme
chore: add nix flake for reproducible development environment
d068e0f 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
chore: add placeholder nix package configuration for mediator
66e3a54 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
wip
25979f1 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
wip
ee48f4f 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
wip
014eb20 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
wip
6e702a1 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
progress
a851693 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
refactor: move dependency setup to build phase in nix package
2da6213 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
refactor: reorganize nix packages into mediator subdirectory
b408610 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
build: package mediator as executable with Java runtime
5dc2a1c 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
feat: add Nix-based Docker image build for mediator
93d242d 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
refactor: rename customJdk to jdkCustom across nix files
caf1798 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
feat: add nix flake checks and multi-platform docker builds
f3b1a2b 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
chore: improve nix package configuration and environment setup
b0b17cd 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
feat: add version file and update script for mediator package
eabab3d 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
Revert "feat: add version file and update script for mediator package"
6f2d506 
This reverts commit 1d064ed.

Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
feat: add dynamic versioning to nix packages and docker images
920e731 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
refactor: simplify docker image configuration and remove healthcheck
eedde43 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
fix: add platform-specific JDK configuration for Linux and Darwin
ac33466 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
fix(nix): configure scalablytyped cache directory for SBT build
052d0e5 
- Add scalablytyped.cacheDir to SBT options
- Create scalablytyped-cache directory during build
- Add fake Library directory in HOME to prevent ScalablyTyped errors
- Clean up scalatsbyed cache in post-build phase

Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
chore: remove sbt-derivation and fix ScalablyTyped cache config
a960da4 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
chore: enable broken packages in nix flake config
2145a9e 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
refactor: restructure nix flake and docker package definitions
70a8052 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
chore: remove mediator-docker from flake checks
23c0e7e 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
fix: enable docker builds on darwin by conditionally including outputs
50c808f 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
docs: add nix packages documentation
0a38a9b 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
docs: add dependency management guide and update script for Nix builds
8ff53f9 
Signed-off-by: Pat Losoponkul <[email protected]>
@patextreme
fix typo
3f74a7e 
Signed-off-by: Pat Losoponkul <[email protected]>
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@patextreme