mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-06 21:58:45 +00:00
102 lines
3.2 KiB
Bash
Executable file
102 lines
3.2 KiB
Bash
Executable file
#!/bin/sh
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# cosmocc downloader script
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# https://justine.lol/cosmo3/#install
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# https://github.com/jart/cosmopolitan/blob/master/tool/cosmocc/README.md
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# collect arguments
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OUTPUT_DIR=${1:?OUTPUT_DIR}
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COSMOCC_VERSION=${2:?COSMOCC_VERSION}
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COSMOCC_SHA256SUM=${3:?COSMOCC_SHA256SUM}
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URL1="https://github.com/jart/cosmopolitan/releases/download/${COSMOCC_VERSION}/cosmocc-${COSMOCC_VERSION}.zip"
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URL2="https://cosmo.zip/pub/cosmocc/cosmocc-${COSMOCC_VERSION}.zip"
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# helper function
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abort() {
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printf '%s\n' "download terminated." >&2
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exit 1
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}
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# exit if already downloaded
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# we need it because directory timestamps work wierdly
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OUTPUT_DIR=${OUTPUT_DIR%/}
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if [ -d "${OUTPUT_DIR}" ]; then
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exit 0
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fi
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# find commands we need to securely download cosmocc
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if ! UNZIP=$(command -v unzip 2>/dev/null); then
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printf '%s\n' "$0: fatal error: you need the unzip command" >&2
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printf '%s\n' "please download https://cosmo.zip/pub/cosmos/bin/unzip and put it on the system path" >&2
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abort
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fi
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if command -v sha256sum >/dev/null 2>&1; then
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# can use system sha256sum
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true
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elif command -v shasum >/dev/null 2>&1; then
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sha256sum() {
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shasum -a 256 "$@"
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}
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else
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if [ ! -f build/sha256sum.c ]; then
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printf '%s\n' "$0: fatal error: you need to install sha256sum" >&2
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printf '%s\n' "please download https://cosmo.zip/pub/cosmos/bin/sha256sum and put it on the system path" >&2
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abort
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fi
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if ! SHA256SUM=$(command -v "$PWD/o/build/sha256sum" 2>/dev/null); then
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if ! CC=$(command -v "$CC" 2>/dev/null); then
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if ! CC=$(command -v cc 2>/dev/null); then
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if ! CC=$(command -v cosmocc 2>/dev/null); then
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printf '%s\n' "$0: fatal error: you need to install either sha256sum, cc, or cosmocc" >&2
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printf '%s\n' "please download https://cosmo.zip/pub/cosmos/bin/sha256sum and put it on the system path" >&2
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abort
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fi
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fi
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fi
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mkdir -p o/build || abort
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SHA256SUM="$PWD/o/build/sha256sum"
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printf '%s\n' "${CC} -w -O2 -o ${SHA256SUM} build/sha256sum.c" >&2
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"${CC}" -w -O2 -o "${SHA256SUM}.$$" build/sha256sum.c || abort
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mv -f "${SHA256SUM}.$$" "${SHA256SUM}" || abort
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fi
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sha256sum() {
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"${SHA256SUM}" "$@"
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}
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fi
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if WGET=$(command -v wget 2>/dev/null); then
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DOWNLOAD=$WGET
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DOWNLOAD_ARGS=-O
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elif CURL=$(command -v curl 2>/dev/null); then
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DOWNLOAD=$CURL
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DOWNLOAD_ARGS=-fLo
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else
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printf '%s\n' "$0: fatal error: you need to install either wget or curl" >&2
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printf '%s\n' "please download https://cosmo.zip/pub/cosmos/bin/wget and put it on the system path" >&2
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abort
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fi
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# create temporary output directory
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OLDPWD=$PWD
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OUTPUT_TMP="${OUTPUT_DIR}.tmp.$$/"
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mkdir -p "${OUTPUT_TMP}" || abort
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cd "${OUTPUT_TMP}"
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die() {
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cd "${OLDPWD}"
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rm -rf "${OUTPUT_TMP}"
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abort
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}
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# download cosmocc toolchain
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# multiple urls avoids outages and national firewalls
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if ! "${DOWNLOAD}" ${DOWNLOAD_ARGS} cosmocc.zip "${URL1}"; then
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rm -f cosmocc.zip
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"${DOWNLOAD}" ${DOWNLOAD_ARGS} cosmocc.zip "${URL2}" || die
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fi
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printf '%s\n' "${COSMOCC_SHA256SUM} *cosmocc.zip" >cosmocc.zip.sha256sum
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sha256sum -c cosmocc.zip.sha256sum || die
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"${UNZIP}" cosmocc.zip || die
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rm -f cosmocc.zip cosmocc.zip.sha256sum
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# commit output directory
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cd "${OLDPWD}" || die
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mv "${OUTPUT_TMP}" "${OUTPUT_DIR}" || die
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