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# -- Build
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# Specify the platform here so that we pull the SDK image matching the host platform,
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# instead of the target platform specified during build by the `--platform` option.
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# Use the .NET 8.0 preview because the `--arch` option is only available in that version.
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# https://github.com/dotnet/dotnet-docker/issues/4388#issuecomment-1459038566
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# TODO: switch images to Alpine once .NET 8.0 is released.
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# Currently, the correct preview version is only available on Debian.
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# https://github.com/dotnet/dotnet-docker/blob/main/samples/selecting-tags.md
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FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-preview AS build
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# Expose the target architecture set by the `docker build --platform` option, so that
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# we can build the assembly for the correct platform.
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ARG TARGETARCH
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WORKDIR /build
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COPY favicon.ico .
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COPY NuGet.config .
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COPY Directory.Build.props .
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COPY DiscordChatExporter.Core DiscordChatExporter.Core
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COPY DiscordChatExporter.Cli DiscordChatExporter.Cli
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# Publish a self-contained assembly so we can use a slimmer runtime image
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RUN dotnet publish DiscordChatExporter.Cli \
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--configuration Release \
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-p:CSharpier_Bypass=true \
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--self-contained \
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--use-current-runtime \
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--arch $TARGETARCH \
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--output publish/
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# -- Run
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# Use `runtime-deps` instead of `runtime` because we have a self-contained assembly
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FROM --platform=$TARGETPLATFORM mcr.microsoft.com/dotnet/runtime-deps:7.0 AS run
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# Create a non-root user to run the app, so that the output files can be accessed by the host
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# https://github.com/Tyrrrz/DiscordChatExporter/issues/851
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RUN adduser --disabled-password --no-create-home dce
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USER dce
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# This directory is exposed to the user for mounting purposes, so it's important that it always
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# stays the same for backwards compatibility.
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WORKDIR /out
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COPY --from=build /build/publish /opt/dce
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ENTRYPOINT ["/opt/dce/DiscordChatExporter.Cli"]
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