esniper: add support for CURL_CA_BUNDLE variable to fix SSL authentication errors

pkgs/applications/networking/esniper/default.nix

@@ -10,6 +10,9 @@ stdenv.mkDerivation {
 
   buildInputs = [openssl curl];
 
+  # Add support for CURL_CA_BUNDLE variable.
+  patches = [ ./find-ca-bundle.patch ];
+
   postInstall = ''
     sed <"frontends/snipe" >"$out/bin/snipe" \
       -e "2i export PATH=\"$out/bin:${coreutils}/bin:${gawk}/bin:${bash}/bin:${which}/bin:\$PATH\""

pkgs/applications/networking/esniper/find-ca-bundle.patch

@@ -0,0 +1,26 @@
+diff -ubr '--exclude=*.o' esniper-2-27-0-orig/http.c esniper-2-27-0-patched/http.c
+--- esniper-2-27-0-orig/http.c	2012-02-06 22:04:06.000000000 +0100
++++ esniper-2-27-0-patched/http.c	2012-07-27 10:54:20.893054646 +0200
+@@ -200,6 +200,9 @@
+ int
+ initCurlStuff(void)
+ {
++	/* Path to OpenSSL bundle file. */
++	const char *ssl_capath=NULL;
++
+ 	/* list for custom headers */
+ 	struct curl_slist *slist=NULL;
+ 
+@@ -241,6 +244,12 @@
+ 	if ((curlrc = curl_easy_setopt(easyhandle, CURLOPT_COOKIEFILE, "")))
+ 		return initCurlStuffFailed();
+ 
++	/* If the environment variable CURL_CA_BUNDLE is set, pass through its
++	 * contents to curl. */
++	if ((ssl_capath = getenv("CURL_CA_BUNDLE")))
++		if ((curlrc = curl_easy_setopt(easyhandle, CURLOPT_CAINFO, ssl_capath)))
++			return initCurlStuffFailed();
++
+ 	slist = curl_slist_append(slist, "Accept: text/*");
+ 	slist = curl_slist_append(slist, "Accept-Language: en");
+ 	slist = curl_slist_append(slist, "Accept-Charset: iso-8859-1,*,utf-8");