[[language]]
name = "rust"
formatter = { command = "rustfmt" }

# temp dir for building
ARG HELIX_BUILD_DIR=/helix  
# root dir for binary e.g. `/usr/bin/hx`
ARG HELIX_BIN_DIR=/usr
ARG HELIX_DEFAULT_RUNTIME=/usr/lib/helix/runtime


#==rust==
FROM docker.io/alpine AS rust
RUN apk update && \
    apk add --no-cache curl
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
#   update PATH for cargo
ENV PATH="/root/.cargo/bin:$PATH"


#==helix==

FROM rust AS helix-build
ARG HELIX_BUILD_DIR
ARG HELIX_BIN_DIR
ARG HELIX_DEFAULT_RUNTIME
ENV HELIX_DEFAULT_RUNTIME=$HELIX_DEFAULT_RUNTIME
#   https://www.reddit.com/r/HelixEditor/comments/11sfobd/not_getting_syntax_highlighting_even_though/
ENV RUSTFLAGS="-C target-feature=-crt-static"
RUN apk update && \
    apk add git g++
RUN git clone https://github.com/helix-editor/helix $HELIX_BUILD_DIR
WORKDIR $HELIX_BUILD_DIR
RUN cargo install --path helix-term --locked --root $HELIX_BIN_DIR


FROM rust AS helix
ARG HELIX_BUILD_DIR
ARG HELIX_BIN_DIR
ARG HELIX_DEFAULT_RUNTIME
ENV HELIX_DEFAULT_RUNTIME=$HELIX_DEFAULT_RUNTIME

ARG HOME=/root
ARG HELIX_CONFIG=$HOME/.config/helix/
# 1. (LSP) Language Server Protocol
RUN rustup component add rust-analyzer
# 2. (DAP) Debug Adapter Protocol
#    workaround for lldb-dap https://github.com/helix-editor/helix/issues/9964
RUN apk add lldb && \
    ln -s /usr/bin/lldb-vscode /usr/bin/lldb-dap
# 3. formatter
RUN mkdir -p $HELIX_CONFIG
COPY languages.toml $HELIX_CONFIG
# 4. queries
RUN mkdir -p $HELIX_DEFAULT_RUNTIME
COPY --from=helix-build $HELIX_BUILD_DIR/runtime $HELIX_DEFAULT_RUNTIME
# binary
COPY --from=helix-build $HELIX_BIN_DIR/bin/hx $HELIX_BIN_DIR/bin/
CMD ["hx"]