Use coldfusion to execute a bash script and get the current git commit

hash.sh

#!/bin/bash

# change directory to the path passed from cf
# then do a git log, oneline to avoid commit messages (I had to specify the full path to git)
# pipe that to "head" and limit it to 1 line
# this will give us "HASH MESSAGE"
# use awk to print the first "column" -> HASH
cd $1 && /usr/local/git/bin/git log --oneline | head -n 1 | awk '{print $1}'

index.cfm

<cfscript>
    # NOTE! THIS IS JUST AN EXPERIMENT, DON'T DROP EXECUTEABLE BASH SCRIPTS IN YOUR WEB ROOT

    // get the path to the folder we're in (or use a specific hardcoded path to your bash file if it's elsewhere, which it should be
    path = getDirectoryFromPath(getCurrentTemplatePath());

    // execute a bash script (make sure it can be executed by the user running as CF
    // give it the above #path# as a parameter
    cfexecute(
        name="bash",
        arguments="/full/path/to/git-hash-read/hash.sh #path#",
        variable="githash",
        errorVariable="hashbang",
        timeout=1
    );
</cfscript>
<cfoutput>
    Let's see if we can get that commit hash!
    <h1>hash</h1>
    #githash#
    <h2>Was there an error?</h2>
    #hashbang#
</cfoutput>