dib-lint: Ignore editor temp files for linting run

When running dib-lint vi temp files .*.sw? files are included which leads to
false positives.  ALso all editor files are checked when looking at indents,
again this results in false positives.

Exclude those files by checking if they're in the user/project's
.gitignore setup.

Change-Id: I0a48174f22a8dad9e8f15bf3f70835d021a2d46f

.gitignore

@@ -4,6 +4,7 @@ cover/*
 *~
 .testrepository
 *.sw?
+#*#
 *.pyc
 .tox
 *.egg

bin/dib-lint

@@ -73,14 +73,15 @@ trap "rm -rf $TMPDIR" EXIT
 
 # note .py files are run through flake8 directly in tox.ini
 for i in $(find $ELEMENTS_DIR -type f \
-                -not -name \*~        \
-                -not -name \#\*\#     \
-                -not -name \*.orig    \
                 -not -name \*.rst     \
                 -not -name \*.yaml    \
-                -not -name \*.py      \
-                -not -name \*.pyc); do
+                -not -name \*.py); do
 
+    # Skip files in .gitignore
+    if git check-ignore -q "$i" ; then
+        echo Skipping $i
+        continue
+    fi
     echo "Checking $i"
 
     exclusions=("$(parse_exclusions $i)")
@@ -232,6 +233,11 @@ echo "Checking indents..."
 
 for i in $(find $ELEMENTS_DIR -type f -and -name '*.rst' -or -type f -executable) \
              $(find $LIB_DIR -type f); do
+    # Skip files in .gitignore
+    if git check-ignore -q "$i" ; then
+        echo Skipping $i
+        continue
+    fi
     # Check for tab indentation
     if ! excluded tabindent; then
         if grep -q $'^ *\t' ${i}; then