Add git hook: .githooks/pre-push (NVIDIA#33)

Author: bmhowe23

.githooks/pre-push

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+# A hook script to verify what is about to be pushed.  Called by "git
+# push" after it has checked the remote status, but before anything has been
+# pushed.  If this script exits with a non-zero status nothing will be pushed.
+#
+# This hook is called with the following parameters:
+#
+# $1 -- Name of the remote to which the push is being done
+# $2 -- URL to which the push is being done
+#
+# If pushing without using a named remote those arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to
+# the standard input in the form:
+#
+#   <local ref> <local oid> <remote ref> <remote oid>
+
+BAD_WORDS=("NvidiaProprietary" "Nvidia Proprietary" "NV_PRIVATE")
+
+remote="$1"
+url="$2"
+
+zero=$(git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')
+
+while read local_ref local_oid remote_ref remote_oid
+do
+  if test "$local_oid" = "$zero"
+  then
+    # Handle delete
+    :
+  else
+    if test "$remote_oid" = "$zero"
+    then
+      # New branch, examine all commits
+      range="$local_oid"
+    else
+      # Update to existing branch, examine new commits
+      range="$remote_oid..$local_oid"
+    fi
+
+    # If pushing to a public GitHub repo (i.e. any GitHub repo that is not
+    # private), do validation checks.
+    if [[ $url =~ "github.com" && ! $url =~ "private" ]]; then
+      commits=$(git rev-list $range)
+      for commit in $commits; do
+        for word in "${BAD_WORDS[@]}"; do
+          if git show $commit | grep -q "$word"; then
+            echo >&2 "Error: Commit '$commit' contains the forbidden word '$word'. Not pushing!"
+            exit 1
+          fi
+        done
+      done
+    fi
+  fi
+done
+
+exit 0