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Always use assembly stores when assemblies are to be embedded #9410

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All the non-fastdev builds will use assembly stores unconditionally now.

@grendello grendello force-pushed the dev/grendel/stop-packaging-individual-assemblies branch 3 times, most recently from 69a8829 to 68bd71a Compare October 28, 2024 13:15
@grendello grendello force-pushed the dev/grendel/stop-packaging-individual-assemblies branch 2 times, most recently from da5da68 to 1dbe4ff Compare November 4, 2024 09:25
@grendello grendello force-pushed the dev/grendel/stop-packaging-individual-assemblies branch from 1dbe4ff to b6cf84c Compare November 22, 2024 17:02
jonpryor pushed a commit that referenced this pull request Nov 22, 2024
Fixes: #9532

Context: #9410
Context: 86260ed
Context: c927026

In Debug configuration builds, `$(EmbedAssembliesIntoApk)`=false by
default.  This enables Fast Deployment in commercial/non-OSS builds.

When `$(EmbedAssembliesIntoApk)`=true, there are two separate ways to
embed assemblies into the `.apk`:

  * Assembly Stores (c927026), which is a "single" (-ish) file that
    contains multiple assemblies, enabled by setting
    `$(AndroidUseAssemblyStore)`=true.

    This is the default behavior for Release configuration builds.

  * One file per assembly (86260ed).

    This is the default behavior for Debug configuration builds when
    `$(EmbedAssembliesIntoApk)`=true.

Aside: #9410 is an attempt to *remove* support for the
"one file per assembly" packaging strategy, which will *not* be
applied to release/9.0.1xx.

When using the "one file per assembly" strategy, all the assemblies
are wrapped in a valid ELF shared library image and placed in the
`lib/{ABI}` directories inside the APK/AAB archive.  Since those
directories don't support subdirectories, we need to encode satellite
assembly culture in a way that doesn't use the `/` directory
separator char.

This encoding, as originally implemented, unfortunately used the `-`
character which made it ambiguous with culture names that consist of
two parts, e.g. `de-DE`, since the unmangling process would look for
the first occurrence of `-` to replace it with `/`, which would form
invalid assembly names such as `de/DE-MyAssembly.resources.dll`
instead of the correct `de-DE/MyAssembly.resources.dll`.  This would,
eventually, lead to a mismatch when looking for satellite assembly for
that specific culture.

Fix it by changing the encoding for `/` from `-` to `_`, so that the
mangled assembly name looks like
`lib_de-DE_MyAssembly.resources.dll.so` and we can unambiguously
decode it to the correct `de-DE/MyAssembly.resources.dll` name.
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