tmt: Simplify test configuration

We are running the same test multiple times, so we can de-duplicate
the logic so that it is written only once and reused for each variant.

tmt/plans/build-gnome.fmf

@@ -1,28 +1,7 @@
 summary: Build GNOME image
-prepare:
-  - name: install packages
-    how: install
-    package:
-      - distribution-gpg-keys
-      - fatcat
-      - git-core
-      - kiwi
-      - libselinux-utils
-      - p7zip-plugins
-      - python3-boto3
-      - rpmdistro-repoquery
-      - zip
-      - zstd
 discover:
-    how: shell
-    tests:
-      - name: build image
-        test: |
-          setenforce 0
-          $TMT_TREE/builder.py build gnome
-          $TMT_TREE/builder.py package gnome
-          $TMT_TREE/builder.py tmt gnome
-          setenforce 1
-
+    how: fmf
+environment:
+    image_variant: gnome
 execute:
     how: tmt

tmt/plans/build-kde.fmf

@@ -1,28 +1,7 @@
 summary: Build KDE image
-prepare:
-  - name: install packages
-    how: install
-    package:
-      - distribution-gpg-keys
-      - fatcat
-      - git-core
-      - kiwi
-      - libselinux-utils
-      - p7zip-plugins
-      - python3-boto3
-      - rpmdistro-repoquery
-      - zip
-      - zstd
 discover:
-    how: shell
-    tests:
-      - name: build image
-        test: |
-          setenforce 0
-          $TMT_TREE/builder.py build kde
-          $TMT_TREE/builder.py package kde
-          $TMT_TREE/builder.py tmt kde
-          setenforce 1
-
+    how: fmf
+environment:
+    image_variant: kde
 execute:
     how: tmt

tmt/plans/build-minimal.fmf

@@ -1,28 +1,7 @@
 summary: Build Minimal image
-prepare:
-  - name: install packages
-    how: install
-    package:
-      - distribution-gpg-keys
-      - fatcat
-      - git-core
-      - kiwi
-      - libselinux-utils
-      - p7zip-plugins
-      - python3-boto3
-      - rpmdistro-repoquery
-      - zip
-      - zstd
 discover:
-    how: shell
-    tests:
-      - name: build image
-        test: |
-          setenforce 0
-          $TMT_TREE/builder.py build minimal
-          $TMT_TREE/builder.py package minimal
-          $TMT_TREE/builder.py tmt minimal
-          setenforce 1
-
+    how: fmf
+environment:
+    image_variant: minimal
 execute:
     how: tmt

tmt/plans/build-server.fmf

@@ -1,28 +1,7 @@
 summary: Build Server image
-prepare:
-  - name: install packages
-    how: install
-    package:
-      - distribution-gpg-keys
-      - fatcat
-      - git-core
-      - kiwi
-      - libselinux-utils
-      - p7zip-plugins
-      - python3-boto3
-      - rpmdistro-repoquery
-      - zip
-      - zstd
 discover:
-    how: shell
-    tests:
-      - name: build image
-        test: |
-          setenforce 0
-          $TMT_TREE/builder.py build server
-          $TMT_TREE/builder.py package server
-          $TMT_TREE/builder.py tmt server
-          setenforce 1
-
+    how: fmf
+environment:
+    image_variant: server
 execute:
     how: tmt

tmt/tests/build-image.fmf

@@ -0,0 +1,21 @@
+summary: Build image
+require:
+  - distribution-gpg-keys
+  - fatcat
+  - git-core
+  - kiwi
+  - libselinux-utils
+  - p7zip-plugins
+  - python3-boto3
+  - rpmdistro-repoquery
+  - zip
+  - zstd
+framework: shell
+path: /
+test: |
+  setenforce 0
+  ./builder.py build $image_variant
+  ./builder.py package $image_variant
+  ./builder.py tmt $image_variant
+  setenforce 1
+duration: 60m