tests: Create temporary directories in '/tmp'.

* tests/gpgscm/tests.scm (mkdtemp): Create temporary directories in
'/tmp' on UNIX, or in '%Temp' on Windows.
* tests/migrations/common.scm (run-test): Turn error into a warning.
* tests/openpgp/defs.scm (start-agent): Likewise.
--

This fixes the problem of GnuPG components being unable to communicate
because of too long GnuPG home directories in important build
environments like the Debian build servers despite the use of socket
directories.

This reverts d75d20909d.

Signed-off-by: Justus Winter <justus@g10code.com>

tests/gpgscm/tests.scm

@@ -271,9 +271,11 @@
 ;; generic name is used.  Returns an absolute path.
 (define (mkdtemp . components)
   (canonical-path (_mkdtemp (if (null? components)
-				(string-append "gpgscm-" (get-isotime) "-"
-					       (basename-suffix *scriptname* ".scm")
-					       "-XXXXXX")
+				(path-join
+				 (if *win32* (getenv "Temp") "/tmp")
+				 (string-append "gpgscm-" (get-isotime) "-"
+						(basename-suffix *scriptname* ".scm")
+						"-XXXXXX"))
 				(apply path-join components)))))
 
 (define-macro (with-temporary-working-directory . expressions)

tests/migrations/common.scm

@@ -53,7 +53,7 @@
    (untar-armored src-tarball)
    (setenv "GNUPGHOME" (getcwd) #t)
 
-   (catch (fail "Creating socket directory failed (see README):" (car *error*))
+   (catch (log "Warning: Creating socket directory failed:" (car *error*))
 	  (call-popen `(,gpgconf --create-socketdir) ""))
    (test (getcwd))
    (catch (log "Warning: Removing socket directory failed.")

tests/openpgp/defs.scm

@@ -446,7 +446,7 @@
     (atexit (lambda ()
 	      (with-home-directory gnupghome
 				   (stop-agent)))))
-  (catch (fail "Creating socket directory failed (see README):" (car *error*))
+  (catch (log "Warning: Creating socket directory failed:" (car *error*))
 	 (call-popen `(,(tool 'gpgconf) --create-socketdir) ""))
   (call-check `(,(tool 'gpg-connect-agent) --verbose
 		,(string-append "--agent-program=" (tool 'gpg-agent)