gui, api: Indicate running under container (#8728)

This adds a word to the version string when running containerized. The
purpose is mostly to facilitate troubleshooting via screenshot by
"leaking" this rather important aspect of the setup. Additionally, the
version row gets "no-overflow-ellipsis" treatment so that the whole
thing is actually visible in the GUI and the (now useless) tooltip is
removed. In production releases this won't make a difference as the
whole thing will typically fit, but in odd setups it provides more info
up front.

5 files changed, 14 insertions, 3 deletions

diff --git a/go.mod b/go.mod
index 74538321d3..eb4afd1168 100644
--- a/go.mod
+++ b/go.mod
@@ -61,6 +61,7 @@ require (
 require (
 	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/calmh/incontainer v0.0.0-20221224152218-b3e71b103d7a // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
 	github.com/golang/mock v1.6.0 // indirect
diff --git a/go.sum b/go.sum
index 2e6af2c6c5..a77701ebb1 100644
--- a/go.sum
+++ b/go.sum
@@ -27,6 +27,12 @@ github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBT
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
 github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b h1:Fjm4GuJ+TGMgqfGHN42IQArJb77CfD/mAwLbDUoJe6g=
 github.com/calmh/glob v0.0.0-20220615080505-1d823af5017b/go.mod h1:91K7jfEsgJSyfSrX+gmrRfZMtntx6JsHolWubGXDopg=
+github.com/calmh/incontainer v0.0.0-20221224114231-8fd484b086d2 h1:1e21mRtyPbUn5W/lFvk+rCBVuzkfiiflv1vn8p4Btho=
+github.com/calmh/incontainer v0.0.0-20221224114231-8fd484b086d2/go.mod h1:eOhqnw15c9X+4RNBe0W3HlUZFfX16O0EDsCOInTndHY=
+github.com/calmh/incontainer v0.0.0-20221224151841-a0bf9955b52f h1:a0rHjaYZeQgEn/oB956REp1A2mUFQY83iQlICIu7Oo4=
+github.com/calmh/incontainer v0.0.0-20221224151841-a0bf9955b52f/go.mod h1:eOhqnw15c9X+4RNBe0W3HlUZFfX16O0EDsCOInTndHY=
+github.com/calmh/incontainer v0.0.0-20221224152218-b3e71b103d7a h1:CjrQbpvnV4BMzPHf0r8p2FAvzEp/bp761CmBBeNIHXI=
+github.com/calmh/incontainer v0.0.0-20221224152218-b3e71b103d7a/go.mod h1:eOhqnw15c9X+4RNBe0W3HlUZFfX16O0EDsCOInTndHY=
 github.com/calmh/xdr v1.1.0 h1:U/Dd4CXNLoo8EiQ4ulJUXkgO1/EyQLgDKLgpY1SOoJE=
 github.com/calmh/xdr v1.1.0/go.mod h1:E8sz2ByAdXC8MbANf1LCRYzedSnnc+/sXXJs/PVqoeg=
 github.com/ccding/go-stun v0.1.4 h1:lC0co3Q3vjAuu2Jz098WivVPBPbemYFqbwE1syoka4M=
diff --git a/gui/default/index.html b/gui/default/index.html
index 7f26b0adf4..b527d98dd6 100644
--- a/gui/default/index.html
+++ b/gui/default/index.html
@@ -720,9 +720,7 @@
                     </tr>
                     <tr>
                       <th><span class="fas fa-fw fa-tag"></span>&nbsp;<span translate>Version</span></th>
-                      <td class="text-right">
-                        <span tooltip data-original-title="{{versionString()}}">{{versionString()}}</span>
-                      </td>
+                      <td class="text-right no-overflow-ellipse">{{versionString()}}</td>
                     </tr>
                   </tbody>
                 </table>
diff --git a/gui/default/syncthing/core/syncthingController.js b/gui/default/syncthing/core/syncthingController.js
index f43bdea8e8..683504c24b 100755
--- a/gui/default/syncthing/core/syncthingController.js
+++ b/gui/default/syncthing/core/syncthingController.js
@@ -3079,6 +3079,10 @@ angular.module('syncthing.core')
                 's390x': '64-bit z/Architecture',
             }[$scope.version.arch] || $scope.version.arch;
 
+            if ($scope.version.container) {
+                arch += " Container";
+            }
+
             return $scope.version.version + ', ' + os + ' (' + arch + ')';
         };
 
diff --git a/lib/api/api.go b/lib/api/api.go
index 03420c5a56..456123fdc2 100644
--- a/lib/api/api.go
+++ b/lib/api/api.go
@@ -30,6 +30,7 @@ import (
 	"time"
 	"unicode"
 
+	"github.com/calmh/incontainer"
 	"github.com/julienschmidt/httprouter"
 	"github.com/rcrowley/go-metrics"
 	"github.com/thejerf/suture/v4"
@@ -721,6 +722,7 @@ func (*service) getSystemVersion(w http.ResponseWriter, _ *http.Request) {
 		"tags":        build.TagsList(),
 		"stamp":       build.Stamp,
 		"user":        build.User,
+		"container":   incontainer.Detect(),
 	})
 }