1 files changed, 34 insertions, 0 deletions
diff --git a/site_scons/soe_utils.py b/site_scons/soe_utils.py
new file mode 100644
index 0000000..3b87dee
--- /dev/null
+++ b/site_scons/soe_utils.py
@@ -0,0 +1,34 @@
+import os.path
+import re
+
+from SCons.Script import Builder, Action, Scanner
+
+def soelim(target, source, env):
+    """
+    Interpolate files included in [gnt]roff source files using the
+    .so directive.
+
+    This behaves somewhat like the soelim(1) wrapper around groff, but
+    makes us independent of whether the actual underlying implementation
+    includes an soelim() command or the corresponding command-line option
+    to groff(1).  The key behavioral difference is that this doesn't
+    recursively include .so files from the include file.  Not yet, anyway.
+    """
+    t = str(target[0])
+    s = str(source[0])
+    dir, f = os.path.split(s)
+    with open(t, 'w') as tfp, open(s, 'r') as sfp:
+        for line in sfp.readlines():
+            if line[:4] in ['.so ', "'so "]:
+                sofile = os.path.join(dir, line[4:-1])
+                with open(sofile, 'r') as f:
+                    tfp.write(f.read())
+            else:
+                tfp.write(line)
+
+def soscan(node, env, path):
+    c = node.get_text_contents()
+    return re.compile(r"^[\.']so\s+(\S+)", re.M).findall(c)
+
+soelimbuilder = Builder(action = Action(soelim),
+                        source_scanner = Scanner(soscan))