#!/usr/bin/env bash

set -euxo pipefail

# Function for displaying help info
help_info() {
  echo "
Usage: ${0##*/} [options]
Build a release .tar.gz for Linux.

Options:
  -h    Display this help and exit.
  "
}

while getopts 'h' flag
do
    case "${flag}" in
        h)
           help_info
           exit 0
           ;;
    esac
done

export ZED_BUNDLE=true

channel=$(<crates/zed/RELEASE_CHANNEL)
target_dir="${CARGO_TARGET_DIR:-target}"

version="$(script/get-crate-version zed)"
# Set RELEASE_VERSION so it's compiled into GPUI and it knows about the version.
export RELEASE_VERSION="${version}"

commit=$(git rev-parse HEAD | cut -c 1-7)

version_info=$(rustc --version --verbose)
host_line=$(echo "$version_info" | grep host)
target_triple=${host_line#*: }
musl_triple=${target_triple%-gnu}-musl
remote_server_triple=${REMOTE_SERVER_TARGET:-"${musl_triple}"}
rustup_installed=false
if command -v rustup >/dev/null 2>&1; then
    rustup_installed=true
fi

# Generate the licenses first, so they can be baked into the binaries
script/generate-licenses

if "$rustup_installed"; then
    rustup target add "$remote_server_triple"
fi

# Build binary in release mode
export RUSTFLAGS="${RUSTFLAGS:-} -C link-args=-Wl,--disable-new-dtags,-rpath,\$ORIGIN/../lib"
cargo build --release --target "${target_triple}" --package zed --package cli
# Build remote_server in separate invocation to prevent feature unification from other crates
# from influencing dynamic libraries required by it.
if [[ "$remote_server_triple" == "$musl_triple" ]]; then
    export RUSTFLAGS="${RUSTFLAGS:-} -C target-feature=+crt-static"
fi
cargo build --release --target "${remote_server_triple}" --package remote_server

# Strip the binary of all debug symbols
# Later, we probably want to do something like this: https://github.com/GabrielMajeri/separate-symbols
strip --strip-debug "${target_dir}/${target_triple}/release/zed"
strip --strip-debug "${target_dir}/${target_triple}/release/cli"
strip --strip-debug "${target_dir}/${remote_server_triple}/release/remote_server"


# Ensure that remote_server does not depend on libssl nor libcrypto, as we got rid of these deps.
! ldd "${target_dir}/${remote_server_triple}/release/remote_server" | grep -q 'libcrypto\|libssl'

suffix=""
if [ "$channel" != "stable" ]; then
  suffix="-$channel"
fi

# Move everything that should end up in the final package
# into a temp directory.
temp_dir=$(mktemp -d)
zed_dir="${temp_dir}/zed$suffix.app"

# Binary
mkdir -p "${zed_dir}/bin" "${zed_dir}/libexec"
cp "${target_dir}/${target_triple}/release/zed" "${zed_dir}/libexec/zed-editor"
cp "${target_dir}/${target_triple}/release/cli" "${zed_dir}/bin/zed"

# Libs
find_libs() {
    ldd ${target_dir}/${target_triple}/release/zed |\
    cut -d' ' -f3 |\
    grep -v '\<\(libstdc++.so\|libc.so\|libgcc_s.so\|libm.so\|libpthread.so\|libdl.so\)'
}

mkdir -p "${zed_dir}/lib"
rm -rf "${zed_dir}/lib/*"
cp $(find_libs) "${zed_dir}/lib"

# Icons
mkdir -p "${zed_dir}/share/icons/hicolor/512x512/apps"
cp "crates/zed/resources/app-icon$suffix.png" "${zed_dir}/share/icons/hicolor/512x512/apps/zed.png"
mkdir -p "${zed_dir}/share/icons/hicolor/1024x1024/apps"
cp "crates/zed/resources/app-icon$suffix@2x.png" "${zed_dir}/share/icons/hicolor/1024x1024/apps/zed.png"

# .desktop
export DO_STARTUP_NOTIFY="true"
export APP_CLI="zed"
export APP_ICON="zed"
export APP_ARGS="%U"
if [[ "$channel" == "preview" ]]; then
  export APP_NAME="Zed Preview"
elif [[ "$channel" == "nightly" ]]; then
  export APP_NAME="Zed Nightly"
elif [[ "$channel" == "dev" ]]; then
  export APP_NAME="Zed Devel"
else
  export APP_NAME="Zed"
fi

mkdir -p "${zed_dir}/share/applications"
envsubst < "crates/zed/resources/zed.desktop.in" > "${zed_dir}/share/applications/zed$suffix.desktop"

# Copy generated licenses so they'll end up in archive too
cp "assets/licenses.md" "${zed_dir}/licenses.md"

# Create archive out of everything that's in the temp directory
arch=$(uname -m)
target="linux-${arch}"
if  [[ "$channel" == "dev" ]]; then
  archive="zed-${commit}-${target}.tar.gz"
else
  archive="zed-${target}.tar.gz"
fi

rm -rf "${archive}"
remove_match="zed(-[a-zA-Z0-9]+)?-linux-$(uname -m)\.tar\.gz"
ls "${target_dir}/release" | grep -E ${remove_match} | xargs -d "\n" -I {} rm -f "${target_dir}/release/{}" || true
tar -czvf "${target_dir}/release/$archive" -C ${temp_dir} "zed$suffix.app"

gzip --stdout --best "${target_dir}/${remote_server_triple}/release/remote_server" > "${target_dir}/zed-remote-server-linux-${arch}.gz"