This is fully compatible for root and leaf parts, but drops support
for interior parts.  Showing interior parts in raw has always been
braindead broken, so I don't think anyone will miss this.  Tests have
been updated to reflect this.

The diff looks complicated, but the change is simple.  We delete
format_headers_message_part_text, since it's no longer needed; move
the special-case code for --part=0 that used to be in do_show_single
to format_part_raw; and re-indent the code for formatting leaf parts
in format_part_raw.
---
 notmuch-show.c |  165 ++++++++++++++++++++++----------------------------------
 test/multipart |   51 ++++--------------
 2 files changed, 76 insertions(+), 140 deletions(-)

diff --git a/notmuch-show.c b/notmuch-show.c
index 6f6052c..9c2f890 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -20,9 +20,6 @@

 #include "notmuch-client.h"

-static void
-format_headers_message_part_text (GMimeMessage *message);
-
 static notmuch_status_t
 format_part_text (const void *ctx, mime_node_t *node,
                  int indent, const notmuch_show_params_t *params);
@@ -56,23 +53,16 @@ static const notmuch_show_format_t format_mbox = {
     .message_set_end = ""
 };

-static void
-format_part_content_raw (GMimeObject *part);
+static notmuch_status_t
+format_part_raw (unused (const void *ctx), mime_node_t *node,
+                unused (int indent),
+                unused (const notmuch_show_params_t *params));

 static const notmuch_show_format_t format_raw = {
-    "", NULL,
-       "", NULL,
-           "", NULL, format_headers_message_part_text, "\n",
-            "",
-                NULL,
-                NULL,
-                NULL,
-                format_part_content_raw,
-                NULL,
-                "",
-            "",
-       "", "",
-    ""
+    .message_set_start = "",
+    .part = format_part_raw,
+    .message_set_sep = "",
+    .message_set_end = ""
 };

 static const char *
@@ -210,27 +200,6 @@ _is_from_line (const char *line)
 }

 static void
-format_headers_message_part_text (GMimeMessage *message)
-{
-    InternetAddressList *recipients;
-    const char *recipients_string;
-
-    printf ("Subject: %s\n", g_mime_message_get_subject (message));
-    printf ("From: %s\n", g_mime_message_get_sender (message));
-    recipients = g_mime_message_get_recipients (message, 
GMIME_RECIPIENT_TYPE_TO);
-    recipients_string = internet_address_list_to_string (recipients, 0);
-    if (recipients_string)
-       printf ("To: %s\n",
-               recipients_string);
-    recipients = g_mime_message_get_recipients (message, 
GMIME_RECIPIENT_TYPE_CC);
-    recipients_string = internet_address_list_to_string (recipients, 0);
-    if (recipients_string)
-       printf ("Cc: %s\n",
-               recipients_string);
-    printf ("Date: %s\n", g_mime_message_get_date_as_string (message));
-}
-
-static void
 format_headers_json (const void *ctx, GMimeMessage *message)
 {
     void *local = talloc_new (ctx);
@@ -731,31 +700,70 @@ format_part_mbox (const void *ctx, mime_node_t *node, 
unused (int indent),
     return NOTMUCH_STATUS_SUCCESS;
 }

-static void
-format_part_content_raw (GMimeObject *part)
+static notmuch_status_t
+format_part_raw (unused (const void *ctx), mime_node_t *node,
+                unused (int indent),
+                unused (const notmuch_show_params_t *params))
 {
-    if (! GMIME_IS_PART (part))
-       return;
+    if (node->envelope_file) {
+       const char *filename;
+       FILE *file;
+       size_t size;
+       char buf[4096];

-    GMimeStream *stream_stdout;
-    GMimeStream *stream_filter = NULL;
-    GMimeDataWrapper *wrapper;
+       filename = notmuch_message_get_filename (node->envelope_file);
+       if (filename == NULL) {
+           fprintf (stderr, "Error: Cannot get message filename.\n");
+           return NOTMUCH_STATUS_FILE_ERROR;
+       }

-    stream_stdout = g_mime_stream_file_new (stdout);
-    g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream_stdout), FALSE);
+       file = fopen (filename, "r");
+       if (file == NULL) {
+           fprintf (stderr, "Error: Cannot open file %s: %s\n", filename, 
strerror (errno));
+           return NOTMUCH_STATUS_FILE_ERROR;
+       }

-    stream_filter = g_mime_stream_filter_new (stream_stdout);
+       while (!feof (file)) {
+           size = fread (buf, 1, sizeof (buf), file);
+           if (ferror (file)) {
+               fprintf (stderr, "Error: Read failed from %s\n", filename);
+               fclose (file);
+               return NOTMUCH_STATUS_FILE_ERROR;
+           }

-    wrapper = g_mime_part_get_content_object (GMIME_PART (part));
+           if (fwrite (buf, size, 1, stdout) != 1) {
+               fprintf (stderr, "Error: Write failed\n");
+               fclose (file);
+               return NOTMUCH_STATUS_FILE_ERROR;
+           }
+       }

-    if (wrapper && stream_filter)
-       g_mime_data_wrapper_write_to_stream (wrapper, stream_filter);
+       fclose (file);
+    } else if (GMIME_IS_PART (node->part)) {
+       GMimeStream *stream_stdout;
+       GMimeStream *stream_filter = NULL;
+       GMimeDataWrapper *wrapper;

-    if (stream_filter)
-       g_object_unref (stream_filter);
+       stream_stdout = g_mime_stream_file_new (stdout);
+       g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream_stdout), FALSE);

-    if (stream_stdout)
-       g_object_unref(stream_stdout);
+       stream_filter = g_mime_stream_filter_new (stream_stdout);
+
+       wrapper = g_mime_part_get_content_object (GMIME_PART (node->part));
+
+       if (wrapper && stream_filter)
+           g_mime_data_wrapper_write_to_stream (wrapper, stream_filter);
+
+       if (stream_filter)
+           g_object_unref (stream_filter);
+
+       if (stream_stdout)
+           g_object_unref(stream_stdout);
+    } else {
+       fprintf (stderr, "Error: Raw only supports root and leaf parts\n");
+       return NOTMUCH_STATUS_FILE_ERROR;
+    }
+    return NOTMUCH_STATUS_SUCCESS;
 }

 static notmuch_status_t
@@ -891,50 +899,7 @@ do_show_single (void *ctx,

     notmuch_message_set_flag (message, NOTMUCH_MESSAGE_FLAG_MATCH, 1);

-    /* Special case for --format=raw of full single message, just cat out file 
*/
-    if (params->raw && 0 == params->part) {
-
-       const char *filename;
-       FILE *file;
-       size_t size;
-       char buf[4096];
-
-       filename = notmuch_message_get_filename (message);
-       if (filename == NULL) {
-           fprintf (stderr, "Error: Cannot message filename.\n");
-           return 1;
-       }
-
-       file = fopen (filename, "r");
-       if (file == NULL) {
-           fprintf (stderr, "Error: Cannot open file %s: %s\n", filename, 
strerror (errno));
-           return 1;
-       }
-
-       while (!feof (file)) {
-           size = fread (buf, 1, sizeof (buf), file);
-           if (ferror (file)) {
-               fprintf (stderr, "Error: Read failed from %s\n", filename);
-               fclose (file);
-               return 1;
-           }
-
-           if (fwrite (buf, size, 1, stdout) != 1) {
-               fprintf (stderr, "Error: Write failed\n");
-               fclose (file);
-               return 1;
-           }
-       }
-
-       fclose (file);
-
-       return 0;
-
-    } else {
-
-       return show_message (ctx, format, message, 0, params) != 
NOTMUCH_STATUS_SUCCESS;
-
-    }
+    return show_message (ctx, format, message, 0, params) != 
NOTMUCH_STATUS_SUCCESS;
 }

 /* Formatted output of threads */
diff --git a/test/multipart b/test/multipart
index a3036b4..cb16b43 100755
--- a/test/multipart
+++ b/test/multipart
@@ -448,59 +448,30 @@ notmuch show --format=raw --part=0 'id:87liy5ap00.fsf at 
yoom.home.cworth.org' >OUT
 test_expect_equal_file OUTPUT "${MAIL_DIR}"/multipart

 test_begin_subtest "--format=raw --part=1, message body"
-notmuch show --format=raw --part=1 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>OUTPUT
-# output should *not* include newline
-echo >>OUTPUT
+notmuch show --format=raw --part=1 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>&OUTPUT
 cat <<EOF >EXPECTED
-Subject: html message
-From: Carl Worth <cworth at cworth.org>
-To: cworth at cworth.org
-Date: Fri, 05 Jan 2001 15:42:57 +0000
-
-<p>This is an embedded message, with a multipart/alternative part.</p>
-This is an embedded message, with a multipart/alternative part.
-This is a text attachment.
-And this message is signed.
-
--Carl
------BEGIN PGP SIGNATURE-----
-Version: GnuPG v1.4.11 (GNU/Linux)
-
-iEYEARECAAYFAk3SA/gACgkQ6JDdNq8qSWj0sACghqVJEQJUs3yV8zbTzhgnSIcD
-W6cAmQE4dcYrx/LPLtYLZm1jsGauE5hE
-=zkga
------END PGP SIGNATURE-----
+Error: Raw only supports root and leaf parts
 EOF
 test_expect_equal_file OUTPUT EXPECTED

 test_begin_subtest "--format=raw --part=2, multipart/mixed"
-notmuch show --format=raw --part=2 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>OUTPUT
+notmuch show --format=raw --part=2 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>&OUTPUT
 cat <<EOF >EXPECTED
-Subject: html message
-From: Carl Worth <cworth at cworth.org>
-To: cworth at cworth.org
-Date: Fri, 05 Jan 2001 15:42:57 +0000
-
-<p>This is an embedded message, with a multipart/alternative part.</p>
-This is an embedded message, with a multipart/alternative part.
-This is a text attachment.
-And this message is signed.
-
--Carl
+Error: Raw only supports root and leaf parts
 EOF
 test_expect_equal_file OUTPUT EXPECTED

 test_begin_subtest "--format=raw --part=3, rfc822 part"
-test_subtest_known_broken
-
-notmuch show --format=raw --part=3 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>OUTPUT
-test_expect_equal_file OUTPUT embedded_message
+notmuch show --format=raw --part=3 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>&OUTPUT
+cat <<EOF >EXPECTED
+Error: Raw only supports root and leaf parts
+EOF
+test_expect_equal_file OUTPUT EXPECTED

 test_begin_subtest "--format=raw --part=4, rfc822's html part"
-notmuch show --format=raw --part=4 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>OUTPUT
+notmuch show --format=raw --part=4 'id:87liy5ap00.fsf at yoom.home.cworth.org' 
>&OUTPUT
 cat <<EOF >EXPECTED
-<p>This is an embedded message, with a multipart/alternative part.</p>
-This is an embedded message, with a multipart/alternative part.
+Error: Raw only supports root and leaf parts
 EOF
 test_expect_equal_file OUTPUT EXPECTED

-- 
1.7.7.3

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