Added source code

scripts/deps.py

@@ -0,0 +1,49 @@
+#
+# NopSCADlib Copyright Chris Palmer 2018
+# nop.head@gmail.com
+# hydraraptor.blogspot.com
+#
+# This file is part of NopSCADlib.
+#
+# NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+# GNU General Public License as published by the Free Software Foundation, either version 3 of
+# the License, or (at your option) any later version.
+#
+# NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with NopSCADlib.
+# If not, see <https://www.gnu.org/licenses/>.
+#
+import os
+
+def mtime(file):
+    if os.path.isfile(file):
+        return os.path.getmtime(file)
+    return 0
+
+def deps_name(dir, scad_name):
+    return dir + '/' + scad_name[:-5] + '.deps'
+
+def read_deps(dname):
+    with open(dname, "rt") as file:
+        lines = file.readlines()
+    deps = []
+    for line in lines:
+        if line.startswith('\t'):
+            dep = line[1 : -1].rstrip(' \\')
+            if not dep in ['stl.scad', 'dxf.scad', 'svf.scad', 'png.scad']:
+                deps.append(dep)
+    return deps
+
+def check_deps(target_mtime, dname):
+    if not target_mtime:
+        return "target missing"
+    if not os.path.isfile(dname):
+        return "no deps"
+    deps = read_deps(dname)
+    for dep in deps:
+        if mtime(dep) > target_mtime:
+            return dep + ' changed'
+    return None