compile

#!/bin/bash

declare -r PKG_NAME="${PWD##*/}";

declare -r OS_LINUX="linux";
declare -r OS_MAC="darwin";
declare -r OS_WINDOWS="windows";
declare -r OS_ANDROID="android";

declare -r ARCH_32="386";
declare -r ARCH_64="amd64";
declare -r ARCH_32_ARM="arm";
# declare -r ARCH_64_ARM="arm64";

# Capitalize the first letter of a string.
_capitalize() {
    # For Bash 4+:
    echo "${1^}";
    # For zsh:
    # echo "${(C)1}";
};

# Run `go build` and move the compiled binary to its destination folder.
_build() {
    if [ -e "${PKG_NAME}" ]; then
        gvfs-trash "${PKG_NAME}";
    fi;

    local os="${1}";
    local arch="${2}";
    GOOS="${1}" GOARCH="${2}" go build;

    if [ $? != 0 ]; then
        local statusCode=$?;
        echo "Build failed for '${os}' on '${arch}' architecture";
        exit "${statusCode}";
    else
        echo "Build successful for '${os}' on '${arch}' architecture";
    fi;

    local binary="${PKG_NAME}";
    if [ "${os}" = "${OS_WINDOWS}" ]; then
        binary="${PKG_NAME}.exe";
    fi;

    local osCapitalized;
    osCapitalized="$(_capitalize "${os}")";

    local bits="32";
    if [ "${arch: -2}" = "64" ]; then
        bits="64";
    fi;

    local dst="${osCapitalized}_${bits}";

    mv "${binary}" "${dst}/";

    if [ $? != 0 ]; then
        local statusCode=$?;
        echo "Failed to move '${PKG_NAME}' to '${dst}/'";
        exit "${statusCode}";
    fi;
};

_buildAndroid() {
    # _build "${OS_ANDROID}" "${ARCH_32_ARM}";
    # _build "${OS_ANDROID}" "${ARCH_64_ARM}";

    ##############################
    # THIS ONE ACTUALLY WORKS!!!!!
    ##############################
    # Add '-x' for verbose output
    # GOMOBILE="${GOPATH}/pkg/gomobile" GOOS="android" GOARCH="arm" CC="${GOMOBILE}/android-ndk-r12b/arm/bin/arm-linux-androideabi-clang" CXX="${GOMOBILE}/android-ndk-r12b/arm/bin/arm-linux-androideabi-clang++" CGO_CFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" CGO_CPPFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" CGO_LDFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" CGO_ENABLED=1 GOARM=7 go build -pkgdir="${GOMOBILE}/pkg_android_arm" -tags="" -ldflags="-extldflags=-pie" -buildmode="c-shared" -o "${GOPATH}/src/github.com/GreenRaccoon23/snapzip/Android_32/snapzip" "github.com/GreenRaccoon23/snapzip";
    GOMOBILE="${GOPATH}/pkg/gomobile" \
        GOOS="android" \
        GOARCH="arm" \
        CC="${GOMOBILE}/android-ndk-r12b/arm/bin/arm-linux-androideabi-clang" \
        CXX="${GOMOBILE}/android-ndk-r12b/arm/bin/arm-linux-androideabi-clang++" \
        CGO_CFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" \
        CGO_CPPFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" \
        CGO_LDFLAGS="-target armv7a-none-linux-androideabi --sysroot ${GOMOBILE}/android-ndk-r12b/arm/sysroot" \
        CGO_ENABLED=1 \
        GOARM=7 \
        go build \
            -pkgdir="${GOMOBILE}/pkg_android_arm" \
            -tags="" \
            -ldflags="-extldflags=-pie" \
            -buildmode="c-shared" \
            -o "${GOPATH}/src/github.com/GreenRaccoon23/snapzip/Android_32/snapzip" \
            "github.com/GreenRaccoon23/snapzip";

    if [ $? != 0 ]; then
        local statusCode=$?;
        echo "Build failed for '${OS_ANDROID}' on '${ARCH_32_ARM}' architecture";
        exit "${statusCode}";
    else
        echo "Build successful for '${OS_ANDROID}' on '${ARCH_32_ARM}' architecture";
    fi;
};

_main() {
    local os;
    for os in "${OS_LINUX}" "${OS_MAC}" "${OS_WINDOWS}"; do
    # for os in "${OS_WINDOWS}" "${OS_LINUX}" "${OS_MAC}"; do
        _build "${os}" "${ARCH_32}";
        _build "${os}" "${ARCH_64}";
    done;

    _buildAndroid;
};

_main;