[lbwww-build][PATCH v1 4/4] configure.ac: Add --disable-lighttpd

[Denis 'GNUtoo' Carikli]

Users can also extract the tarball manually and point a browser to it,
so lighttpd should not be striclty required.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
---
 Makefile.am  |  8 ++++++++
 configure.ac | 21 +++++++++++++++++----
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index c6935a9..f6833d0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -101,8 +101,16 @@ test: website.tar.gz
                -- \
                ./serve.sh website.tar.gz
 else
+if WANT_LIGHTTPD
 test: website.tar.gz
                ./serve.sh website.tar.gz
+else
+test:
+       @printf "%s %s\n" \
+               "The test target is disabled." \
+               "To enable it, run './configure --enable-lighttpd'."
+       @false
+endif
 endif
 
 upload: website.tar.gz
diff --git a/configure.ac b/configure.ac
index 30be170..33a9261 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,6 +51,14 @@ AC_ARG_WITH([lbwww-img-path],
 
 AM_CONDITIONAL( [WANT_LBWWW_IMG_PATH], [test x"$LBWWW_IMG_PATH" != x""])
 
+# --enable-lighttpd
+AC_ARG_ENABLE(lighttpd,
+  [AS_HELP_STRING([--enable-lighttpd],
+                  [Use lighttpd to run the scripts (default=enabled)])],
+  [lighttpd=$enableval],
+  [lighttpd="yes"])
+AM_CONDITIONAL( [WANT_LIGHTTPD], [test x"$lighttpd" = x"yes"])
+
 # --with-untitled-path
 AC_ARG_WITH([untitled-path],
   [AS_HELP_STRING([--with-untitled-path=PATH],
@@ -112,10 +120,15 @@ AS_IF([test x"$guix" = x"yes"],
              [AC_MSG_ERROR(
               [gzip was not found in PATH ($PATH)])])
 
-       AC_CHECK_PROG([FOUND_LIGHTTPD], [lighttpd], [lighttpd])
-       AS_IF([test x"$FOUND_LIGHTTPD" = x""],
-             [AC_MSG_ERROR(
-              [lighttpd was not found in PATH ($PATH)])])
+       AS_IF([test x"$lighttpd" = x"yes"],
+             [AC_CHECK_PROG([FOUND_LIGHTTPD], [lighttpd], [lighttpd])
+              AS_IF([test x"$FOUND_LIGHTTPD" = x""],
+                    [AC_MSG_ERROR(
+                    [lighttpd was not found in PATH ($PATH)])])],
+             [AC_CHECK_PROG([FOUND_FALSE], [false], [false])
+              AS_IF([test x"$FOUND_FALSE" = x""],
+                    [AC_MSG_ERROR(
+                    [false was not found in PATH ($PATH)])])])
 
        AC_CHECK_PROG([FOUND_MKDIR], [mkdir], [mkdir])
        AS_IF([test x"$FOUND_MKDIR" = x""],
-- 
2.39.1