iOS: bspatch integration

[ofalvai]

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[Copilot]

Pull request overview

Introduces a shared native BSDIFF40 patching implementation intended for iOS and Android, with an iOS unit-test target and CI coverage.

Changes:

• Moves the HDiffPatch bridge and vendored sources into shared directories.
• Adds iOS patch fixtures, unit tests, project configuration, and CI execution.
• Updates Android to consume the shared implementation.

Reviewed changes

Copilot reviewed 19 out of 39 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
shared/third_party/README.md	Documents vendored HDiffPatch sources.
shared/third_party/hdiffpatch/LICENSE	Adds upstream licenses.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/patch.h	Adds patch API declarations.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/patch.c	Adds core patch implementation.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/patch_types.h	Adds patch types and stream interfaces.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/patch_private.h	Adds internal patch helpers.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/hpatch_mt/hpatch_mt.h	Adds multithreading interfaces.
shared/third_party/hdiffpatch/libHDiffPatch/HPatch/checksum_plugin.h	Adds checksum plugin API.
shared/third_party/hdiffpatch/file_for_patch.h	Adds file-stream declarations.
shared/third_party/hdiffpatch/file_for_patch.c	Adds file-stream implementation.
shared/third_party/hdiffpatch/dirDiffPatch/dir_patch/dir_patch_types.h	Adds directory patch types.
shared/third_party/hdiffpatch/decompress_plugin_demo.h	Adds bzip2 decompression support.
shared/third_party/hdiffpatch/bsdiff_wrapper/bspatch_wrapper.h	Declares BSDIFF40 patch APIs.
shared/third_party/hdiffpatch/bsdiff_wrapper/bspatch_wrapper.c	Implements BSDIFF40 patch application.
shared/diffpatch/bspatch_bridge.h	Defines the shared patch bridge API.
shared/diffpatch/bspatch_bridge.c	Implements bridge resource and error handling.
package.json	Adds native unit-test scripts.
ios/CodePushDiffPatchTests/Fixtures/wrong_old/old.dat	Adds mismatched-base fixture.
ios/CodePushDiffPatchTests/Fixtures/identical/old.dat	Adds identical-input fixture.
ios/CodePushDiffPatchTests/Fixtures/identical/new.dat	Adds identical-output fixture.
ios/CodePushDiffPatchTests/Fixtures/identical/patch.bsdiff	Adds identical-data patch fixture.
ios/CodePushDiffPatchTests/Fixtures/empty_old/old.dat	Adds empty-base fixture.
ios/CodePushDiffPatchTests/Fixtures/empty_old/new.dat	Adds expected literal output.
ios/CodePushDiffPatchTests/Fixtures/empty_old/patch.bsdiff	Adds empty-base patch fixture.
ios/CodePushDiffPatchTests/Fixtures/basic/old.dat	Adds ordinary base fixture.
ios/CodePushDiffPatchTests/Fixtures/basic/new.dat	Adds ordinary expected output.
ios/CodePushDiffPatchTests/Fixtures/basic/patch.bsdiff	Adds ordinary patch fixture.
ios/CodePushDiffPatchTests/Fixtures/bad_header/old.dat	Adds invalid-header base fixture.
ios/CodePushDiffPatchTests/Fixtures/bad_header/patch.bsdiff	Adds malformed patch fixture.
ios/CodePushDiffPatchTests/DiffPatchTests-Bridging-Header.h	Exposes the C bridge to Swift tests.
ios/CodePushDiffPatchTests/BSPatchTests.swift	Tests patch success and failures.
ios/CodePush.xcodeproj/xcshareddata/xcschemes/CodePushTests.xcscheme	Adds the shared test scheme.
ios/CodePush.xcodeproj/project.pbxproj	Configures the iOS test target.
CLAUDE.md	Documents native unit testing.
android/app/src/main/java/com/microsoft/codepush/react/diffpatch/DiffPatch.kt	Updates the bridge path reference.
android/app/src/main/cpp/third_party/README.md	Points to shared vendored sources.
android/app/src/main/cpp/CMakeLists.txt	Builds Android against shared sources.
.npmignore	Excludes iOS test sources from publishing.
.github/workflows/ci-test.yml	Runs iOS unit tests and reduces duplicate Android tests.

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[ofalvai]

This xcodeproj is really ancient and has all sorts of problems. The CodePush target doesn't even compile (missing RN headers). We'll fix this one day, but the important thing for this PR is that the tests are buildable and runnable.

[ofalvai]

Fixed, turns out it wasn't even necessary to link Foundation.framework -> removed.