Add '--fakeexitcode' option.

README

@@ -70,6 +70,12 @@ function cvsdiff () { cvs diff $@ | colordiff |less -R; }
 
 Note that the function name, cvsdiff, can be customized.
 
+By default colordiff returns the exit code of the underlying diff invocation
+(if there is one), but there are some circumstances where it is useful to force
+colordiff's exit code to be zero: to do this use the option '--fakeexitcode':
+
+colordiff --fakeexitcode ...
+
 Files
 
 /etc/colordiffrc

colordiff.pl

@@ -160,10 +160,12 @@ sub detect_diff_type {
 
 my $enable_verifymode;
 my $specified_difftype;
+my $enable_fakeexitcode;
 GetOptions(
     # --enable-verifymode option is for testing behaviour of colordiff
     # against standard test diffs
     "verifymode" => \$enable_verifymode,
+    "fakeexitcode" => \$enable_fakeexitcode,
     "difftype=s" => \$specified_difftype
     # TODO - check that specified type is valid, issue warning if not
 );
@@ -490,5 +492,9 @@ sub detect_diff_type {
     s/$/$colour{off}/;
     print "$_";
 }
-
-exit $exitcode;
+if (defined $enable_fakeexitcode) {
+    exit 0;
+}
+else {
+    exit $exitcode;
+}

colordiff.xml

@@ -145,6 +145,17 @@ function cvsdiff () { cvs diff $@ | colordiff |less -R; }
 
 <para>Note that the function name, cvsdiff, can be customized.</para>
 
+<para>By default colordiff returns the exit code of the underlying diff
+invocation (if there is one), but there are some circumstances where it is
+useful to force colordiff's exit code to be zero: to do this use the option
+'--fakeexitcode':
+
+<screen>
+colordiff --fakeexitcode ...
+</screen>
+
+</para>
+
 </refsect1>
 
 <refsect1 id='files'><title>Files</title>