ci: verify installer

With this change, the automated builds run the installer, verify that it
exits with success, and that the InnoSetup compiler was installed.

While at it, the manifest is also extracted and shown, for debugging
purposes.

Signed-off-by: Johannes Schindelin <[email protected]>

.github/workflows/build.yml

@@ -103,3 +103,13 @@ jobs:
           files/ISCC.exe setup-vista.iss &&
           mt '-inputresource:Output\mysetup-vista.exe' -out:mysetup-vista.manifest &&
           cat mysetup-vista.manifest
+      - name: verify installer
+        shell: bash
+        run: |
+          set -x &&
+          ver="$(sed -n 's/^set VER=//p' <build.bat)" &&
+          mt '-inputresource:Output\innosetup-'$ver.exe -out:innosetup-$ver.manifest &&
+          cat innosetup-$ver.manifest &&
+          ./Output/innosetup-$ver.exe //verysilent //dir=InnoSetup //noicons \
+            //tasks= //portable=1 &&
+          test -x InnoSetup/ISCC.exe