Add support for #-comments

Debian Policy allows, in debian/control, lines that start with the
'#'-character.  Those lines are treated as comments by Policy, and ignored.

This patch adds parser support for these comments in dctrl-tools.
Unfortunately, it is not possible (without major changes) to ignore
those comments semantically, since dctrl-tools represents paragraphs
and fields as substrings of the input file.

Accordingly, what this patch does is allow the parser to not choke on
comments.  Comments found inside a paragraph are left semantically
significant (ie. part of the field body in which they are found),
while comments otside of paragraphs are elided.

Signed-off-by: Antti-Juhani Kaijanaho <ajk@debian.org>

3 files changed, 22 insertions, 0 deletions

diff --git a/tests/0009.in b/tests/0009.in
new file mode 100644
index 0000000..f6d485e
--- /dev/null
+++ b/tests/0009.in
@@ -0,0 +1,9 @@
+# abc
+Foo: bar
+# baz
+Xyzzy: foo
+#ytty
+
+# ccd
+Sdd: gh
+goo: gaa
diff --git a/tests/0009.out b/tests/0009.out
new file mode 100644
index 0000000..7c6c2de
--- /dev/null
+++ b/tests/0009.out
@@ -0,0 +1,8 @@
+Foo: bar
+# baz
+Xyzzy: foo
+#ytty
+
+Sdd: gh
+goo: gaa
+
diff --git a/tests/0009.sh b/tests/0009.sh
new file mode 100644
index 0000000..5e2204f
--- /dev/null
+++ b/tests/0009.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -e
+
+$GREP_DCTRL ''