[PATCH 1/2] CLI: set up infrastructure to make path to gpg configurable.

[David Bremner <david@tethera.net>]

GMIME takes a path to gpg, but we hardcode that path.  In this commit
we push hardcoding all the way up to the top level of a notmuch
command, where we can later make it configurable.
---
 crypto.c         | 10 +++++-----
 notmuch-client.h |  1 +
 notmuch-reply.c  |  3 ++-
 notmuch-show.c   |  3 ++-
 4 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/crypto.c b/crypto.c
index 6f4a6db..026640f 100644
--- a/crypto.c
+++ b/crypto.c
@@ -24,12 +24,12 @@
 
 /* Create a GPG context (GMime 2.6) */
 static notmuch_crypto_context_t *
-create_gpg_context (void)
+create_gpg_context (const char *gpgpath)
 {
     notmuch_crypto_context_t *gpgctx;
 
     /* TODO: GMimePasswordRequestFunc */
-    gpgctx = g_mime_gpg_context_new (NULL, "gpg");
+    gpgctx = g_mime_gpg_context_new (NULL, gpgpath ? gpgpath : "gpg");
     if (! gpgctx)
 	return NULL;
 
@@ -43,13 +43,13 @@ create_gpg_context (void)
 
 /* Create a GPG context (GMime 2.4) */
 static notmuch_crypto_context_t *
-create_gpg_context (void)
+create_gpg_context (const char* gpgpath)
 {
     GMimeSession *session;
     notmuch_crypto_context_t *gpgctx;
 
     session = g_object_new (g_mime_session_get_type (), NULL);
-    gpgctx = g_mime_gpg_context_new (session, "gpg");
+    gpgctx = g_mime_gpg_context_new (session, gpgpath ? gpgpath : "gpg");
     g_object_unref (session);
 
     if (! gpgctx)
@@ -83,7 +83,7 @@ notmuch_crypto_get_context (notmuch_crypto_t *crypto, const char *protocol)
     if (strcasecmp (protocol, "application/pgp-signature") == 0 ||
 	strcasecmp (protocol, "application/pgp-encrypted") == 0) {
 	if (! crypto->gpgctx) {
-	    crypto->gpgctx = create_gpg_context ();
+	    crypto->gpgctx = create_gpg_context (crypto->gpgpath);
 	    if (! crypto->gpgctx)
 		fprintf (stderr, "Failed to construct gpg context.\n");
 	}
diff --git a/notmuch-client.h b/notmuch-client.h
index 5e0d475..c25c4ea 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -80,6 +80,7 @@ typedef struct notmuch_crypto {
     notmuch_crypto_context_t* gpgctx;
     notmuch_bool_t verify;
     notmuch_bool_t decrypt;
+    const char *gpgpath;
 } notmuch_crypto_t;
 
 typedef struct notmuch_show_params {
diff --git a/notmuch-reply.c b/notmuch-reply.c
index 7c1c809..e18370f 100644
--- a/notmuch-reply.c
+++ b/notmuch-reply.c
@@ -769,7 +769,8 @@ notmuch_reply_command (notmuch_config_t *config, int argc, char *argv[])
 	.part = -1,
 	.crypto = {
 	    .verify = FALSE,
-	    .decrypt = FALSE
+	    .decrypt = FALSE,
+	    .gpgpath = NULL
 	}
     };
     int format = FORMAT_DEFAULT;
diff --git a/notmuch-show.c b/notmuch-show.c
index d416fbd..d292f29 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -1082,7 +1082,8 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
 	.output_body = TRUE,
 	.crypto = {
 	    .verify = FALSE,
-	    .decrypt = FALSE
+	    .decrypt = FALSE,
+	    .gpgpath = NULL
 	},
 	.include_html = FALSE
     };
-- 
2.1.3