ci: Fix pwsh scripts not exiting on error

We all know that external utilities returning a non-zero exit code do
not terminate a powershell script. However, most do not know (and
neither did I) that it is impossible to promote error exit codes to
script-terminating errors with ErrorActionPreference.

Explicitly check the return codes and Exit.

https://github.com/MicrosoftDocs/PowerShell-Docs/issues/1583

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1368>

ci/images_template.yml

@@ -1,4 +1,4 @@
 variables:
-  GST_RS_IMG_TAG: "2023-12-19.1"
+  GST_RS_IMG_TAG: "2023-12-19.2"
   GST_RS_STABLE: "1.74.1"
   GST_RS_MSRV: "1.70.0"

ci/windows-docker/Dockerfile

@@ -2,9 +2,7 @@
 
 FROM "registry.freedesktop.org/gstreamer/gstreamer/amd64/windows:2023-07-17.0-main"
 
-# Make sure any failure in PowerShell is fatal
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-ENV ErrorActionPreference='Stop'
-SHELL ["powershell","-NoLogo", "-NonInteractive", "-Command"]
 
 ARG DEFAULT_BRANCH="main"
 ARG RUST_VERSION="invalid"

ci/windows-docker/install_gst.ps1

@@ -1,9 +1,11 @@
 [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12;
-# Make sure powershell exits on errors
-$ErrorActionPreference = "Stop"
 
 # Download gstreamer and all its subprojects
 git clone -b $env:DEFAULT_BRANCH --depth 1 https://gitlab.freedesktop.org/gstreamer/gstreamer.git C:\gstreamer
+if (!$?) {
+  Write-Host "Failed to clone gstreamer"
+  Exit 1
+}
 
 Set-Location C:\gstreamer
 
@@ -13,6 +15,10 @@ Move-Item C:/subprojects/*  C:\gstreamer\subprojects
 # Update the subprojects cache
 Write-Output "Running meson subproject reset"
 meson subprojects update --reset
+if (!$?) {
+  Write-Host "Failed to update gstreamer subprojects"
+  Exit 1
+}
 
 $MESON_ARGS = @(`
   "--prefix=C:\gst-install", `
@@ -42,9 +48,24 @@ echo "subproject('gtk')" >> meson.build
 
 Write-Output "Building gstreamer"
 meson setup --vsenv $MESON_ARGS _build
+if (!$?) {
+  type "_build\meson-logs\meson-log.txt"
+  Write-Host "Failed to run meson setup, see log above"
+  Exit 1
+}
+
+Write-Output "Compiling gstreamer"
 meson compile -C _build
+if (!$?) {
+  Write-Host "Failed to run meson compile"
+  Exit 1
+}
 # meson install does a spurious rebuild sometimes that then fails
 meson install --no-rebuild -C _build
+if (!$?) {
+  Write-Host "Failed to run meson install"
+  Exit 1
+}
 
 cd c:\
 Remove-Item -LiteralPath "C:\gstreamer" -Force -Recurse