Add install script

Author: scriptonist

get.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# Taken from https://github.com/vapor-ware/gimme-that/commit/7be1b559cb10be240e55dac555e32e9fea729ccf
+
+# set -x
+set -eo pipefail
+
+# Colors for colorizing
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+PURPLE='\033[0;35m'
+BLUE='\033[0;34m'
+YELLOW='\033[0;33m'
+NC='\033[0m'
+
+# Storage for constants
+TARGET_BIN=${TARGET_BIN:-"hashnode"}
+# TODO: Make this dynamic
+GITHUB_API=${GITHUB_API:-"https://api.github.com"}
+TARGET_GITHUB_USER=${TARGET_GITHUB_USER:-"hashnode"}
+TARGET_GITHUB_REPO=${TARGET_GITHUB_REPO:-"hashnode-cli"}
+TARGET_PROJECT=${TARGET_PROJECT:-$TARGET_GITHUB_USER/$TARGET_GITHUB_REPO}
+TARGET_INSTALL_PATH=${TARGET_INSTALL_PATH:-"/usr/local/bin"}
+HOST_OS=${HOST_OS:-$(uname | tr '[:upper:]' '[:lower:]')}
+if [[ $(uname -m) == "x86_64" ]]; then
+  HOST_ARCH="amd64"
+else
+  HOST_ARCH=${HOST_ARCH:-$(uname -m)}
+fi
+
+# Check for root permission
+touch ${TARGET_INSTALL_PATH}/.gimme &> /dev/null || (echo -e "${RED}Root access is required to install to ${YELLOW}${TARGET_INSTALL_PATH}${NC}" && exit 1)
+rm ${TARGET_INSTALL_PATH}/.gimme
+
+# Basic JSON matching
+# TODO: Clean this up for god's sake!
+function jsonVal {
+    temp=`echo $1 | sed 's/\\\\\//\//g' | sed 's/[{}]//g' | awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}' | sed 's/\"\:\"/\|/g' | sed 's/[\,]/ /g' | sed 's/\"//g' | grep -w $2 | sed 's|.*\:\(.*\)|\1|'`
+    echo ${temp##*|}
+}
+
+# Check GitHub for the latest release
+echo -e "${BLUE}Checking GitHub for the latest release of ${YELLOW}${TARGET_BIN}${NC}"
+URI=${GITHUB_API}/repos/${TARGET_PROJECT}/releases/latest
+RELEASE_RESPONSE=$(curl -L -S -s ${URI})
+
+# Parse release info
+RELEASE_TAG=$(jsonVal "${RELEASE_RESPONSE}" "tag_name")
+# TODO: Make this more flexible
+echo -e "${BLUE}Found release tag: ${YELLOW}${RELEASE_TAG}${NC}"
+TARGET_STRING=${TARGET_BIN}_${HOST_OS}_${HOST_ARCH}
+# echo -e $TARGET_STRING
+# TODO: Ditto. This makes me uber sad.
+echo -e "${BLUE}Downloading ${YELLOW}${TARGET_STRING}${NC}"
+DOWNLOAD_URL="https://github.com/"${TARGET_PROJECT}"/releases/download/"${RELEASE_TAG}"/"${TARGET_STRING}
+# echo -e $DOWNLOAD_URL
+
+# Check if we have this already
+if ! command -v ${TARGET_BIN}; then
+  echo -e "${RED}No previous install found. Installing ${YELLOW}${TARGET_BIN}${NC}${RED} to ${TARGET_INSTALL_PATH}/${TARGET_BIN}${NC}"
+  curl -s -S -L ${DOWNLOAD_URL} -o ${TARGET_INSTALL_PATH}/${TARGET_BIN}
+  chmod +x ${TARGET_INSTALL_PATH}/${TARGET_BIN}
+# TODO: Do some version checking here. Hash?
+elif curl -s -S -L -z ${TARGET_INSTALL_PATH}/${TARGET_BIN} ${DOWNLOAD_URL} -o ${TARGET_INSTALL_PATH}/${TARGET_BIN} ; then
+  echo -e "${RED}Newer binary found! Installing ${YELLOW}${TARGET_BIN}${NC}${RED} to ${TARGET_INSTALL_PATH}/${TARGET_BIN}${NC}"
+  chmod +x ${TARGET_INSTALL_PATH}/${TARGET_BIN}
+  exit 0
+fi
+echo -e "${GREEN}No newer version found. Leaving ${YELLOW}${TARGET_INSTALL_PATH}/${TARGET_BIN}${NC}${NC}"