install-ccache.sh

#!/bin/bash -e

#-------------------------------------------------------------------------------
# Default values
#-------------------------------------------------------------------------------
: ${CCACHE_VERSION:=$1}

echo "[INFO] CCACHE version  '$CCACHE_VERSION'"

: ${GCC_HOME:=}
if [ -z "${GCC_HOME}" ]; then
  echo "[FATAL] \$GCC_HOME is not set"
  exit 1
fi

GCC_VERSION="$(gcc -dumpversion)"

: ${DESTDIR:=$(pwd)}
: ${PREFIX:=${DESTDIR}/${CCACHE_VERSION}/gcc/${GCC_VERSION}}
: ${WORKSPACE:=${PREFIX}/workspace}

#-------------------------------------------------------------------------------
# Sanity Checks
#-------------------------------------------------------------------------------
if [ -z "${CCACHE_VERSION}" ]; then
  echo "Usage: $0 <version: x.x.x>"
  exit 1
fi

#-------------------------------------------------------------------------------
# Meta Information
#-------------------------------------------------------------------------------
CCACHE_SRCDIR="${WORKSPACE}/ccache-${CCACHE_VERSION}"
CCACHE_TARBALL="ccache-${CCACHE_VERSION}.tar.gz"
CCACHE_DOWNLOAD_URL="http://samba.org/ftp/ccache/${CCACHE_TARBALL}"


#-------------------------------------------------------------------------------
# Workspace
#-------------------------------------------------------------------------------
mkdir -p "${WORKSPACE}" || exit 1
pushd    "${WORKSPACE}" || exit 1

#-------------------------------------------------------------------------------
# Download and unpack
#-------------------------------------------------------------------------------
if [ ! -f "$CCACHE_TARBALL" -a ! -f "${CCACHE_TARBALL%.xz}" ]; then
    echo "[INFO] Downloading CCACHE '$CCACHE_DOWNLOAD_URL'"
    wget --no-check-certificate "$CCACHE_DOWNLOAD_URL" || exit 1
else
    echo "[INFO] [SKIP] ccache tarball already exists: '$CCACHE_TARBALL'"
fi

if [ ! -d "$CCACHE_SRCDIR" ]; then
    echo "[INFO] Unpacking ccache tarball: '$CCACHE_TARBALL'"
    tar xvzf "${CCACHE_TARBALL}"
else
    echo "[INFO] [SKIP] ccache source code already exists: '$CCACHE_SRCDIR'"
fi

#-------------------------------------------------------------------------------
# Build and install
#-------------------------------------------------------------------------------
cd "${CCACHE_SRCDIR}"

if [ ! -e "${PREFIX}/bin" ]; then
    echo "[INFO] Configuring ccache"
    echo "[INFO] Installing to '$PREFIX'"
    echo "[INFO] \$GCC_HOME='${GCC_HOME}'"

    "${CCACHE_SRCDIR}/configure" --prefix="$PREFIX" || exit 1

    make -j || exit 1
    make -j install || exit 1
fi

    echo "[INFO] Creating ccache environment setup file"
    cat > "${PREFIX}/setup.sh" <<-EOF
#!/bin/bash
#
# Automatically generated by $0 on $(date)
source "${GCC_HOME}/setup.sh" || return 1

export CCACHE_VERSION="${CCACHE_VERSION}"
export CCACHE_HOME="${PREFIX}"
export PATH="\${CCACHE_HOME}/bin:\${PATH}"
export CCACHE_GCC_HOME="${GCC_HOME}"

if [ -z "\${CCACHE_DIR}" ]; then
  export CCACHE_DIR="/tmp/ccache"
  mkdir -p "\${CCACHE_DIR}" || return 1
  ccache --max-size="1G" > /dev/null || return 1
  true
fi
EOF

#-----------------------------------------------
# Set Permissions
#-----------------------------------------------
echo "[INFO] Setting group permissions of '${PREFIX}'"
chmod -R g+r "${PREFIX}"
find "${PREFIX}" -type d -exec chmod g+x {} \;