copy_support_files.sh

#!/bin/bash

set -eufo pipefail

usage() {
    cat <<EOS
Usage: $0 [-h]

This script copies files needed by fidlbolt from \$FUCHSIA_DIR into ./support.
It creates the following directories:

    ./support/bin                   binaries (fidlc, fidl-format, etc.)
    ./support/etc                   configuration files
    ./support/sdk/fidl              sdk fidl libraries
    ./support/zircon/system/fidl    zircon fidl libraries

It preserves the directory structure for FIDL libraries, rather than simply
placing them all in a ./support/fidl directory, so that paths displayed in
fidlbolt (e.g. import tooltips) resemble Fuchsia source tree paths.
EOS
}

die() {
    echo "$0: $*" >&2
    exit 1
}

while getopts "h" opt; do
    case $opt in
        h) usage; exit 0 ;;
        *) exit 1 ;;
    esac
done
shift $((OPTIND - 1))
if [[ $# -gt 0 ]]; then
    die "unexpected arguments: $*"
fi

if [[ -z "$FUCHSIA_DIR" ]]; then
    die "FUCHSIA_DIR not set"
fi

# Source vars.sh for FUCHSIA_BUILD_DIR, ZIRCON_TOOLS_DIR, and PREBUILT_RUST_DIR.
# (Reset shell options before sourcing since vars.sh does not expect them.)
set +ufo pipefail
source "$FUCHSIA_DIR/tools/devshell/lib/vars.sh" || exit $?
fx-config-read
set -ufo pipefail

cd "$(dirname "$0")"
rm -rf support/
mkdir -p support/{bin,etc,sdk/fidl,zircon/system/fidl}
cp \
    "$FUCHSIA_BUILD_DIR/host_x64/"{fidlc,fidlgen_{llcpp,hlcpp,rust,go,dart}} \
    "$ZIRCON_TOOLS_DIR/fidl-"{format,lint} \
    "$PREBUILT_RUST_DIR/bin/rustfmt" \
    support/bin
cp \
    "$FUCHSIA_DIR/rustfmt.toml" \
    support/etc
find "$FUCHSIA_DIR/sdk/fidl" -mindepth 1 -maxdepth 1 -type d -print0 \
    | xargs -0 -I% cp -r % support/sdk/fidl
find "$FUCHSIA_DIR/zircon/system/fidl" -mindepth 1 -maxdepth 1 -type d -print0 \
    | xargs -0 -I% cp -r % support/zircon/system/fidl
# Remove the non-fidl files. This is easier and less error-prone than
# manipulating paths to call mkdir -p and only copying the .fidl files.
find support/{sdk,zircon} -type f -not -name '*.fidl' -delete

hash() {
    git rev-parse --verify HEAD
}

timestamp() {
    git show -s --format=%ct HEAD
}

rustfmt_version=$(
    "$PREBUILT_RUST_DIR/bin/rustfmt" --version \
    | awk 'NR==1{sub(/-.*/, "", $2); print $2}'
)

cat <<EOS > support/etc/fidlbolt_deployment.json
{
    "fidlbolt": {
        "hash": "$(hash)",
        "timestamp": $(timestamp)
    },
    "fuchsia": {
        "hash": "$(cd "$FUCHSIA_DIR" && hash)",
        "timestamp": $(cd "$FUCHSIA_DIR" && timestamp)
    },
    "topaz": {
        "hash": "$(cd "$FUCHSIA_DIR/topaz" && hash)",
        "timestamp": $(cd "$FUCHSIA_DIR/topaz" && timestamp)
    },
    "rustfmt": {
        "version": "$rustfmt_version"
    }
}
EOS