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install-binary.sh
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install-binary.sh
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#!/bin/bash
# Shamelessly copied from https://github.com/technosophos/helm-template
PROJECT_NAME="helm-diff"
PROJECT_GH="databus23/$PROJECT_NAME"
: ${HELM_PLUGIN_PATH:="$(helm home)/plugins/helm-diff"}
# Convert the HELM_PLUGIN_PATH to unix if cygpath is
# available. This is the case when using MSYS2 or Cygwin
# on Windows where helm returns a Windows path but we
# need a Unix path
if type cygpath > /dev/null 2>&1; then
HELM_PLUGIN_PATH=$(cygpath -u $HELM_PLUGIN_PATH)
fi
if [[ $SKIP_BIN_INSTALL == "1" ]]; then
echo "Skipping binary install"
exit
fi
# initArch discovers the architecture for this system.
initArch() {
ARCH=$(uname -m)
case $ARCH in
armv5*) ARCH="armv5";;
armv6*) ARCH="armv6";;
armv7*) ARCH="armv7";;
aarch64) ARCH="arm64";;
x86) ARCH="386";;
x86_64) ARCH="amd64";;
i686) ARCH="386";;
i386) ARCH="386";;
esac
}
# initOS discovers the operating system for this system.
initOS() {
OS=$(echo `uname`|tr '[:upper:]' '[:lower:]')
case "$OS" in
# Msys support
msys*) OS='windows';;
# Minimalist GNU for Windows
mingw*) OS='windows';;
darwin) OS='macos';;
esac
}
# verifySupported checks that the os/arch combination is supported for
# binary builds.
verifySupported() {
local supported="linux-amd64\nmacos-amd64\nwindows-amd64"
if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then
echo "No prebuild binary for ${OS}-${ARCH}."
exit 1
fi
if ! type "curl" > /dev/null && ! type "wget" > /dev/null; then
echo "Either curl or wget is required"
exit 1
fi
}
# getDownloadURL checks the latest available version.
getDownloadURL() {
local url="https://api.github.com/repos/$PROJECT_GH/releases/latest"
local version=$(git describe --tags --exact-match 2>/dev/null)
if [ -n "$version" ]; then
url="https://api.github.com/repos/$PROJECT_GH/releases/tags/$version"
fi
# Use the GitHub API to find the download url for this project.
if type "curl" > /dev/null; then
DOWNLOAD_URL=$(curl -v -s $url | grep $OS | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
elif type "wget" > /dev/null; then
DOWNLOAD_URL=$(wget -q -O - $url | grep $OS | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
fi
}
# downloadFile downloads the latest binary package and also the checksum
# for that binary.
downloadFile() {
PLUGIN_TMP_FILE="/tmp/${PROJECT_NAME}.tgz"
echo "Downloading $DOWNLOAD_URL"
if type "curl" > /dev/null; then
curl -L "$DOWNLOAD_URL" -o "$PLUGIN_TMP_FILE"
elif type "wget" > /dev/null; then
wget -q -O "$PLUGIN_TMP_FILE" "$DOWNLOAD_URL"
fi
}
# installFile verifies the SHA256 for the file, then unpacks and
# installs it.
installFile() {
HELM_TMP="/tmp/$PROJECT_NAME"
mkdir -p "$HELM_TMP"
tar xf "$PLUGIN_TMP_FILE" -C "$HELM_TMP"
HELM_TMP_BIN="$HELM_TMP/diff/diff"
echo "Preparing to install into ${HELM_PLUGIN_PATH}"
cp "$HELM_TMP_BIN" "$HELM_PLUGIN_PATH"
}
# fail_trap is executed if an error occurs.
fail_trap() {
result=$?
if [ "$result" != "0" ]; then
echo "Failed to install $PROJECT_NAME"
echo "\tFor support, go to https://github.com/databus23/helm-diff."
fi
exit $result
}
# testVersion tests the installed client to make sure it is working.
testVersion() {
set +e
echo "$PROJECT_NAME installed into $HELM_PLUGIN_PATH/$PROJECT_NAME"
$HELM_PLUGIN_PATH/diff -h
set -e
}
# Execution
#Stop execution on any error
trap "fail_trap" EXIT
set -e
initArch
initOS
verifySupported
getDownloadURL
downloadFile
installFile
testVersion