sysops-scripts/show-git-commit-summary at master · cnamejj/sysops-scripts · GitHub

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#!/bin/bash

typeset -i n_commits

st_hash=$1
en_hash=$2
git_path="$3"

# ---

if [ "${st_hash}" = "" -o "${en_hash}" = "" ]
then
	echo "**Error** A start and end hash value are required, got '${st_hash}' and '${en_hash}'."
	exit 1
fi

# ---

if [ "${git_path}" != "" ]
then
	cd "${git_path}"
	rc=$?
	if [ ${rc} -ne 0 ]
	then
	    	echo "Can't change to directory '${git_path}', rc=${rc}"
		exit 1
	fi
fi

# ---

n_commits="$(git log "${st_hash}..${en_hash}" --no-merges --pretty='%H' | wc -l)"

#echo "Found ${n_commits} commits between hash '${st_hash}' and '${en_hash}'"

git log "${st_hash}..${en_hash}" --no-merges --graph --pretty='~~~ %d~~~ %H~~~ %aN~~~ <%aE>~~~ %s' \
| git name-rev --stdin \
| awk '\

    BEGIN \
    {
	MAX_OUT_LEN = 200;  # Something very large for now...
    }

    {
	nparts = split( $0, parts, "~~~ ");
	if( nparts != 6)
	{
#     	    out = $0;
	    out = "";
	}
	else
	{
	    graph = parts[1];
	    sub( " $", "", graph);

	    decorate1 = parts[2];
	    sub( "^.*\\(", "", decorate1);
	    sub( "\\)$", "", decorate1);
	    gsub( "^ *", "", decorate1);
	    gsub( " *$", "", decorate1);
	    sub( "origin/master, ", "", decorate1);
	    sub( "origin/HEAD, ", "", decorate1);
	    sub( "^HEAD, ", "", decorate1);
	    sub( "^tags/", "", decorate1);
	    sub( "^remotes/", "", decorate1);
	    sub( "^origin/", "", decorate1);
	    sub( ", deploy$", "", decorate1);

	    short_hash = substr( parts[3],1,7);

	    decorate2 = parts[3];
	    sub( "^.*\\(", "", decorate2);
	    sub( "\\)$", "", decorate2);
	    gsub( "^ *", "", decorate2);
	    gsub( " *$", "", decorate2);
	    sub( "^HEAD, ", "", decorate2);
	    sub( "^tags/", "", decorate2);
	    sub( "^remotes/", "", decorate2);
	    sub( "^origin/", "", decorate2);
	    sub( ", deploy$", "", decorate2);

	    if( decorate1 != "" && substr(decorate2,1,length(decorate1)) != decorate1)
	      decorate = decorate1 " / " decorate2;
	    else decorate = decorate2;

	    author_name = parts[4];
	    author_email = parts[4];
	    author = author_name " " author_email;

	    commit_msg = parts[6];

#	    out = graph " " short_hash " " decorate ": " author ", " commit_msg;
# -- Simplified output to make cut-n-paste into deploy log easier
	    out = "* " commit_msg " (" short_hash ") " author_name;

	    if( length(out) > MAX_OUT_LEN) out = substr( out, 1, MAX_OUT_LEN - 3) "...";
	}

	if( out != "")
	{
	    ncommit++;
	    printf "%s\n", out;
	}
    }

    END \
    {
	if( !ncommit) printf "No changes found.\n";
    }'