When running from the Linux snap, use no-sandbox

.circleci/config.yml

@@ -5,6 +5,7 @@ jobs:
       - image: circleci/node:12.9.1-stretch
     steps:
       - checkout
+      - sudo apt-get update && sudo apt-get install libsecret-1-dev
       - restore_cache:
           name: Restore Package Cache
           keys:

app/build/resources/linux/Mailspring.desktop.in

@@ -2,7 +2,7 @@
 Name=<%= productName %>
 Comment=<%= description %>
 GenericName=Mail Client
-Exec=/usr/bin/mailspring %U
+Exec=mailspring %U
 Icon=mailspring
 Type=Application
 StartupNotify=true
@@ -109,4 +109,4 @@ Name[zh_CN]=新邮件
 Name[zh_TW]=新增郵件
 Name[zh]=新信息
 Name[zu]=Umyalezo omusha
-Exec=/usr/bin/mailspring mailto:
+Exec=mailspring mailto:

scripts/utils/child-process-wrapper.js

@@ -15,7 +15,7 @@ exports.safeExec = function(command, options, callback) {
 
   options.stdio = 'inherit';
   var child = childProcess.exec(command, options, function(error, stdout, stderr) {
-    if (error && !options.ignoreStderr) {
+    if (error && error.code && !options.ignoreStderr) {
       console.error(`safeExec: the command exited with ${error} ${error.code}`);
       console.error('`------------- stderr ------------');
       console.error(stderr);

snap/snapcraft.template.yaml

@@ -53,7 +53,7 @@ parts:
 
 apps:
   mailspring:
-    command: desktop-launch $SNAP/usr/share/mailspring/mailspring
+    command: desktop-launch $SNAP/usr/share/mailspring/mailspring --no-sandbox
     desktop: usr/share/applications/Mailspring.desktop
     environment:
       # Correct the TMPDIR path for Chromium Framework/Electron to