176 lines
3.9 KiB
Bash
Executable File
176 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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die() {
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echo "$@" >&2
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exit 1
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}
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have_binary() {
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type "$1" > /dev/null 2> /dev/null
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}
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check_writable() {
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printf "" > "$1" && rm "$1"
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}
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try_download() {
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url="$1"
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output="$2"
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command="$3"
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util_name="$(set -- $command; echo "$1")"
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if ! have_binary "$util_name"; then
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return 1
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fi
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printf '==> Using %s to download "%s" to "%s"\n' "$util_name" "$url" "$output"
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if eval "$command"; then
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echo "==> Download complete!"
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return
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else
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echo "error: couldn't download with $util_name ($?)"
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return 1
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fi
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}
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download() {
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dl_url="$1"
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dl_output="$2"
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test "$#" -eq "2" || die "download requires exactly two arguments, was given $@"
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if ! check_writable "$dl_output"; then
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die "download error: cannot write to $dl_output"
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fi
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try_download "$dl_url" "$dl_output" "wget '$dl_url' -O '$dl_output'" && return
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try_download "$dl_url" "$dl_output" "curl --silent --fail --output '$dl_output' '$dl_url'" && return
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try_download "$dl_url" "$dl_output" "fetch '$dl_url' -o '$dl_output'" && return
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try_download "$dl_url" "$dl_output" "http '$dl_url' > '$dl_output'" && return
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try_download "$dl_url" "$dl_output" "ftp -o '$dl_output' '$dl_url'" && return
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die "Unable to download $dl_url. exiting."
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}
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unarchive() {
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ua_archivetype="$1"
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ua_infile="$2"
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ua_outfile="$3"
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ua_distname="$4"
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ua_binpostfix=""
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ua_os=$(uname -o)
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if [ "$ua_os" = "Msys" ] || [ "$ua_os" = "Cygwin" ] ; then
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ua_binpostfix=".exe"
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fi
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ua_outfile="$ua_outfile$ua_binpostfix"
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if ! check_writable "$ua_outfile"; then
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die "unarchive error: cannot write to $ua_outfile"
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fi
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case "$ua_archivetype" in
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tar.gz)
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if have_binary tar; then
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echo "==> using 'tar' to extract binary from archive"
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< "$ua_infile" tar -Ozxf - "$ua_distname/$ua_distname$ua_binpostfix" > "$ua_outfile" \
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|| die "tar has failed"
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else
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die "no binary on system for extracting tar files"
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fi
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;;
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zip)
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if have_binary unzip; then
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echo "==> using 'unzip' to extract binary from archive"
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unzip -p "$ua_infile" "$ua_distname/$ua_distname$ua_binpostfix" > "$ua_outfile" \
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|| die "unzip has failed"
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else
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die "no installed method for extracting .zip archives"
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fi
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;;
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*)
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die "unrecognized archive type '$ua_archivetype'"
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esac
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chmod +x "$ua_outfile" || die "chmod has failed"
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}
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get_go_vars() {
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if [ ! -z "$GOOS" ] && [ ! -z "$GOARCH" ]; then
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printf "%s-%s" "$GOOS" "$GOARCH"
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elif have_binary go; then
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printf "%s-%s" "$(go env GOOS)" "$(go env GOARCH)"
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else
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die "no way of determining system GOOS and GOARCH\nPlease manually set GOOS and GOARCH then retry."
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fi
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}
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mkurl() {
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m_root="$1"
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m_name="$2"
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m_vers="$3"
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m_archive="$4"
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m_govars=$(get_go_vars) || die "could not get go env vars"
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echo "https://ipfs.io$m_root/$m_name/$m_vers/${m_name}_${m_vers}_$m_govars.$m_archive"
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}
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distroot="$1"
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distname="$2"
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outpath="$3"
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version="$4"
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if [ -z "$distroot" ] || [ -z "$distname" ] || [ -z "$outpath" ] || [ -z "$version" ]; then
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die "usage: dist_get <distroot> <distname> <outpath> <version>"
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fi
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case $version in
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v*)
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# correct input
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;;
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*)
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echo "invalid version '$version'" >&2
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die "versions must begin with 'v', for example: v0.4.0"
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;;
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esac
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# TODO: don't depend on the go tool being installed to detect this
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goenv=$(get_go_vars) || die "could not get go env vars"
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case $goenv in
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linux-*)
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archive="tar.gz"
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;;
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darwin-*)
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archive="tar.gz"
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;;
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windows-*)
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archive="zip"
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;;
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freebsd-*)
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archive="tar.gz"
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;;
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openbsd-*)
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archive="tar.gz"
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;;
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*)
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echo "unrecognized system environment: $goenv" >&2
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die "currently only linux, darwin, windows and freebsd are supported by this script"
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esac
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mkdir -p bin/tmp
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url=$(mkurl "$distroot" "$distname" "$version" "$archive")
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tmpfi="bin/tmp/$distname.$archive"
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download "$url" "$tmpfi"
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if [ $? -ne 0 ]; then
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die "failed to download $url to $tmpfi"
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fi
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unarchive "$archive" "$tmpfi" "$outpath" "$distname"
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if [ $? -ne 0 ]; then
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die "failed to extract archive $tmpfi"
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fi
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