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DiscordChatExporter/DiscordChatExporter.Cli.doc...

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