[geary/mjog/gmime-stream-write-api-break: 2/2] engine: Work around VAPI binding change causing GMime API break

[Michael Gratton <mjog src gnome org>]

commit 1f3e4decd387deffb29220cb1ed6acba94d9c2b8
Author: Michael Gratton <mike vee net>
Date:   Wed Apr 21 09:11:59 2021 +1000

    engine: Work around VAPI binding change causing GMime API break
    
    See https://github.com/jstedfast/gmime/pull/101

 src/engine/util/util-stream.vala | 13 +++++++++++++
 src/meson.build                  |  4 ++++
 2 files changed, 17 insertions(+)
---
diff --git a/src/engine/util/util-stream.vala b/src/engine/util/util-stream.vala
index 18df50fb3..1eeef49ca 100644
--- a/src/engine/util/util-stream.vala
+++ b/src/engine/util/util-stream.vala
@@ -60,6 +60,7 @@ namespace Geary.Stream {
             return this.written;
         }
 
+#if GMIME_STREAM_WRITE_STRING
         public override ssize_t write(string buf, size_t len) {
             ssize_t ret = -1;
             try {
@@ -70,6 +71,18 @@ namespace Geary.Stream {
             }
             return ret;
         }
+#else
+        public override ssize_t write(uint8[] buf) {
+            ssize_t ret = -1;
+            try {
+                ret = this.dest.write(buf);
+                this.written += buf.length;
+            } catch (IOError err) {
+                // Oh well
+            }
+            return ret;
+        }
+#endif
 
         public override int close() {
             int ret = -1;
diff --git a/src/meson.build b/src/meson.build
index 07f2158f6..5eded12e6 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -39,6 +39,10 @@ if get_option('ref_tracking').enabled()
   vala_defines += [ '--define=REF_TRACKING' ]
 endif
 
+if gmime.version().version_compare('<=3.2.7')
+  vala_defines += [ '--define=GMIME_STREAM_WRITE_STRING' ]
+endif
+
 geary_vala_args += vala_defines
 
 # Common cc options