Add 'find-git-repos'

README.md

@@ -76,6 +76,10 @@ filter
 ---
 Usage: `cat <stream | filter --negative FILENAME` blacklists anything in FILENAME, there are options for whitelisting and dealing with repeats.
 
+find-git-repos
+---
+Usage: `find-git-repos DIRECTORY` prints all git repositories found, one per line.
+
 fragile-treediff
 ---
 Usage: `fragile-treediff FOLDER1 FOLDER2`

find-git-repos

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+usage() {
+    echo "Usage: find-git-repos DIRECTORY"
+}
+
+if [ $# -ne 1 ]
+then
+    usage;
+    exit 1
+fi
+
+DIRECTORY="$(realpath "$1")"; shift
+
+find ${DIRECTORY} -type d -name '.git' -printf '%h\n' # %h is 'dirname <file>'