just/www/install.sh

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#!/usr/bin/env sh
set -eu
if [ -n "${GITHUB_ACTIONS-}" ]; then
set -x
fi
# Check pipefail support in a subshell, ignore if unsupported
# shellcheck disable=SC3040
(set -o pipefail 2> /dev/null) && set -o pipefail
help() {
cat <<'EOF'
Install a binary release of a just hosted on GitHub
USAGE:
install [options]
FLAGS:
-h, --help Display this message
-f, --force Force overwriting an existing binary
OPTIONS:
--tag TAG Tag (version) of the crate to install, defaults to latest release
--to LOCATION Where to install the binary [default: ~/bin]
--target TARGET
EOF
}
crate=just
url=https://github.com/casey/just
releases=$url/releases
say() {
echo "install: $*" >&2
}
err() {
if [ -n "${td-}" ]; then
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rm -rf "$td"
fi
say "error: $*"
exit 1
}
need() {
if ! command -v "$1" > /dev/null 2>&1; then
err "need $1 (command not found)"
fi
}
download() {
url="$1"
output="$2"
if command -v curl > /dev/null; then
curl --proto =https --tlsv1.2 -sSfL "$url" "-o$output"
else
wget --https-only --secure-protocol=TLSv1_2 --quiet "$url" "-O$output"
fi
}
force=false
while test $# -gt 0; do
case $1 in
--force | -f)
force=true
;;
--help | -h)
help
exit 0
;;
--tag)
tag=$2
shift
;;
--target)
target=$2
shift
;;
--to)
dest=$2
shift
;;
*)
say "error: unrecognized argument '$1'. Usage:"
help
exit 1
;;
esac
shift
done
command -v curl > /dev/null 2>&1 ||
command -v wget > /dev/null 2>&1 ||
err "need wget or curl (command not found)"
need install
need mkdir
need mktemp
need tar
if [ -z "${tag-}" ]; then
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need grep
need cut
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fi
if [ -z "${target-}" ]; then
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need cut
fi
if [ -z "${dest-}" ]; then
dest="$HOME/bin"
fi
if [ -z "${tag-}" ]; then
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tag=$(
download https://api.github.com/repos/casey/just/releases/latest - |
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grep tag_name |
cut -d'"' -f4
)
fi
if [ -z "${target-}" ]; then
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# bash compiled with MINGW (e.g. git-bash, used in github windows runners),
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# unhelpfully includes a version suffix in `uname -s` output, so handle that.
# e.g. MINGW64_NT-10-0.19044
kernel=$(uname -s | cut -d- -f1)
uname_target="$(uname -m)-$kernel"
case $uname_target in
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aarch64-Linux) target=aarch64-unknown-linux-musl;;
arm64-Darwin) target=aarch64-apple-darwin;;
x86_64-Darwin) target=x86_64-apple-darwin;;
x86_64-Linux) target=x86_64-unknown-linux-musl;;
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x86_64-MINGW64_NT) target=x86_64-pc-windows-msvc;;
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x86_64-Windows_NT) target=x86_64-pc-windows-msvc;;
*)
# shellcheck disable=SC2016
err 'Could not determine target from output of `uname -m`-`uname -s`, please use `--target`:' "$uname_target"
;;
esac
fi
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case $target in
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x86_64-pc-windows-msvc) extension=zip; need unzip;;
*) extension=tar.gz;;
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esac
archive="$releases/download/$tag/$crate-$tag-$target.$extension"
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say "Repository: $url"
say "Crate: $crate"
say "Tag: $tag"
say "Target: $target"
say "Destination: $dest"
say "Archive: $archive"
td=$(mktemp -d || mktemp -d -t tmp)
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if [ "$extension" = "zip" ]; then
download "$archive" "$td/just.zip"
unzip -d "$td" "$td/just.zip"
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else
download "$archive" - | tar -C "$td" -xz
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fi
if [ -e "$dest/just" ] && [ "$force" = false ]; then
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err "\`$dest/just\` already exists"
else
mkdir -p "$dest"
install -m 755 "$td/just" "$dest"
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fi
rm -rf "$td"