cmdline-opts/gen.pl: Open input files in CRLF mode

On Windows it's possible to have input files with CRLF line endings and
a perl that defaults to LF line endings (eg msysgit). Currently that
results in generator output of mixed line endings of CR, LF and CRLF.

This change fixes that issue in the most succinct way by opening the
files in :crlf text mode even when the perl being used does not default
to that mode. (On operating systems that don't have a separate text mode
it's essentially a no-op.) The output continues to be in the perl's
native line ending.

1 files changed, 19 insertions, 3 deletions

diff --git a/docs/cmdline-opts/gen.pl b/docs/cmdline-opts/gen.pl
index c8b129360..89a5df845 100755
--- a/docs/cmdline-opts/gen.pl
+++ b/docs/cmdline-opts/gen.pl
@@ -1,5 +1,21 @@
 #!/usr/bin/perl
 
+=begin comment
+
+This script generates the manpage.
+
+Example: gen.pl mainpage > curl.1
+
+Dev notes:
+
+We open *input* files in :crlf translation (a no-op on many platforms) in
+case we have CRLF line endings in Windows but a perl that defaults to LF.
+Unfortunately it seems some perls like msysgit can't handle a global input-only
+:crlf so it has to be specified on each file open for text input.
+
+=end comment
+=cut
+
 my $some_dir=".";
 
 opendir(my $dh, $some_dir) || die "Can't opendir $some_dir: $!";
@@ -85,7 +101,7 @@ sub added {
 
 sub single {
     my ($f, $standalone)=@_;
-    open(F, "<$f") ||
+    open(F, "<:crlf", "$f") ||
         return 1;
     my $short;
     my $long;
@@ -219,7 +235,7 @@ sub single {
 
 sub getshortlong {
     my ($f)=@_;
-    open(F, "<$f");
+    open(F, "<:crlf", "$f");
     my $short;
     my $long;
     my $help;
@@ -265,7 +281,7 @@ sub indexoptions {
 
 sub header {
     my ($f)=@_;
-    open(F, "<$f");
+    open(F, "<:crlf", "$f");
     my @d;
     while(<F>) {
         push @d, $_;