Added GitHub downloader/updater POC. It downloads a manifest of the hashes for all files for use in comparisons.

Insurgency/manifest.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+# LGSM git manifest functions
+# Author: Jared Ballou
+# Website: http://gameservermanagers.com
+#
+# This is another oe of my POC tools. Eventually I want to have a pretty robust update/download system here
+# Goals:
+#  * Keep function files up to date on client machines
+#  * Deploy other programs or support tools
+#  * Learn more about GitHub API
+#  * Parse JSON in Bash
+
+# Temporary file location
+cache_dir=/tmp/lgsm
+githubuser="jaredballou"
+githubrepo="linuxgsm"
+githubbranch="master"
+
+# Create cache directory if missing
+if [ ! -e "${cache_dir}" ]
+then
+	mkdir -p "${cache_dir}"
+fi
+
+# fn_getgithash filename
+# Calculate the Git hash for a file
+function fn_getgithash(){
+	filename=$1
+	if [ -e $filename ]
+	then
+		printf "blob %d\0%s\n" "$(stat --format='%s' $filename)" "$(cat $filename)" | sha1sum | awk '{print $1}'
+	else
+		echo "NOTFOUND"
+	fi
+}
+
+# Get latest commit from GitHub. Cache file for 60 minutes
+lastcommit="${cache_dir}/lastcommit"
+if [ $(find "${lastcommit}" -mmin +60 2>/dev/null) ]
+then
+	echo "found"
+else
+	curl -s "https://api.github.com/repos/${githubuser}/${githubrepo}/git/refs/heads/${githubbranch}" | ./functions/jq-linux64 -r '.object.sha' > "${lastcommit}"
+fi
+
+# Get manifest of all files at this revision in GitHub. These hashes are what we use to compare and select files that need to be updated.
+lastcommit="$(cat "${lastcommit}")"
+manifest="${cache_dir}/${lastcommit}.manifest"
+if [ ! -e "${manifest}" ]
+then
+	curl -s "https://api.github.com/repos/${githubuser}/${githubrepo}/git/trees/${githubbranch}?recursive=1" | ./functions/jq-linux64 -r '.tree[] | .path + " " + .sha' > "${manifest}"
+fi
+
+# Check all files in functions for updates
+for file in functions/*
+do
+	myhash=$(fn_getgithash $file)
+	githash=$(grep "^$file " $manifest 2>/dev/null| cut -d" " -f2)
+	if [ "${githash}" == "" ]
+	then
+		echo "Can't find ${file} in git!"
+	elif [ "${myhash}" != "${githash}" ]
+	then
+		echo "Would fetch ${file}: have ${myhash}, expected ${githash}"
+	else
+		echo "${file} is OK"
+	fi
+done