1 files changed, 97 insertions, 0 deletions
diff --git a/debian/lib/python/debian_linux/utils.py b/debian/lib/python/debian_linux/utils.py
new file mode 100644
index 000000000..34c15536d
--- /dev/null
+++ b/debian/lib/python/debian_linux/utils.py
@@ -0,0 +1,97 @@
+import codecs
+import os
+import re
+import textwrap
+
+
+class Templates(object):
+    def __init__(self, dirs=["debian/templates"]):
+        self.dirs = dirs
+
+        self._cache = {}
+
+    def __getitem__(self, key):
+        ret = self.get(key)
+        if ret is not None:
+            return ret
+        raise KeyError(key)
+
+    def _read(self, name):
+        prefix, id = name.split('.', 1)
+
+        for suffix in ['.in', '']:
+            for dir in self.dirs:
+                filename = "%s/%s%s" % (dir, name, suffix)
+                if os.path.exists(filename):
+                    f = codecs.open(filename, 'r', 'utf-8')
+                    if prefix == 'control':
+                        return read_control(f)
+                    if prefix == 'tests-control':
+                        return read_tests_control(f)
+                    return f.read()
+
+    def get(self, key, default=None):
+        if key in self._cache:
+            return self._cache[key]
+
+        value = self._cache.setdefault(key, self._read(key))
+        if value is None:
+            return default
+        return value
+
+
+def read_control(f):
+    from .debian import Package
+    return _read_rfc822(f, Package)
+
+
+def read_tests_control(f):
+    from .debian import TestsControl
+    return _read_rfc822(f, TestsControl)
+
+
+def _read_rfc822(f, cls):
+    entries = []
+    eof = False
+
+    while not eof:
+        e = cls()
+        last = None
+        lines = []
+        while True:
+            line = f.readline()
+            if not line:
+                eof = True
+                break
+            # Strip comments rather than trying to preserve them
+            if line[0] == '#':
+                continue
+            line = line.strip('\n')
+            if not line:
+                break
+            if line[0] in ' \t':
+                if not last:
+                    raise ValueError(
+                        'Continuation line seen before first header')
+                lines.append(line.lstrip())
+                continue
+            if last:
+                e[last] = '\n'.join(lines)
+            i = line.find(':')
+            if i < 0:
+                raise ValueError(u"Not a header, not a continuation: ``%s''" %
+                                 line)
+            last = line[:i]
+            lines = [line[i + 1:].lstrip()]
+        if last:
+            e[last] = '\n'.join(lines)
+        if e:
+            entries.append(e)
+
+    return entries
+
+
+class TextWrapper(textwrap.TextWrapper):
+    wordsep_re = re.compile(
+        r'(\s+|'                                  # any whitespace
+        r'(?<=[\w\!\"\'\&\.\,\?])-{2,}(?=\w))')   # em-dash