[evolution-data-server] camel-gpg-context: Add some debug prints

[Milan Crha <mcrha src gnome org>]

commit 5740819e50eb6cacb28e4db351916652ca81a3ae
Author: Milan Crha <mcrha redhat com>
Date:   Mon Feb 15 17:54:12 2021 +0100

    camel-gpg-context: Add some debug prints
    
    Let any CAMEL_DEBUG=gpg print the command line being used to execute gpg.
    
    Use CAMEL_DEBUG=gpg:data to left temporary recipient files stored
    in the /tmp/ directory. It's those received from an address book.

 src/camel/camel-gpg-context.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/src/camel/camel-gpg-context.c b/src/camel/camel-gpg-context.c
index 5e2528bdf..1f6a2f2f4 100644
--- a/src/camel/camel-gpg-context.c
+++ b/src/camel/camel-gpg-context.c
@@ -499,8 +499,10 @@ gpg_ctx_free (struct _GpgCtx *gpg)
        if (gpg->recipient_key_files) {
                GSList *link;
 
-               for (link = gpg->recipient_key_files; link; link = g_slist_next (link)) {
-                       g_unlink (link->data);
+               if (!camel_debug ("gpg:data")) {
+                       for (link = gpg->recipient_key_files; link; link = g_slist_next (link)) {
+                               g_unlink (link->data);
+                       }
                }
 
                g_slist_free_full (gpg->recipient_key_files, g_free);
@@ -817,6 +819,20 @@ gpg_ctx_op_start (struct _GpgCtx *gpg,
 
        argv = gpg_ctx_get_argv (gpg, fds[7], &status_fd, fds[8], &passwd_fd);
 
+       if (camel_debug_start ("gpg")) {
+               guint ii;
+
+               printf ("[GPG] going to execute:");
+               for (ii = 0; ii < argv->len; ii++) {
+                       if (!argv->pdata[ii])
+                               break;
+
+                       printf (" %s", (const gchar *) argv->pdata[ii]);
+               }
+               printf ("\n");
+               camel_debug_end ();
+       }
+
        if (!(gpg->pid = fork ())) {
                /* child process */