Add initramfs elements

These are taken from the defs2bst README:
https://gitlab.com/BuildStream/defs2bst/blob/master/README.rst

3 files changed, 33 insertions, 0 deletions

diff --git a/elements/initramfs/initramfs-gz.bst b/elements/initramfs/initramfs-gz.bst
new file mode 100644
index 00000000..81b5b7d3
--- /dev/null
+++ b/elements/initramfs/initramfs-gz.bst
@@ -0,0 +1,16 @@
+kind: script
+description: The compressed initramfs
+depends:
+- filename: initramfs/initramfs.bst
+  type: build
+- filename: foundation.bst
+  type: build
+
+config:
+  base: foundation.bst
+  input: initramfs/initramfs.bst
+
+  commands:
+  - mkdir -p %{install-root}/boot
+  - (find . -print0 | cpio -0 -H newc -o) |
+    gzip -c > %{install-root}/boot/initramfs.gz
diff --git a/elements/initramfs/initramfs-scripts.bst b/elements/initramfs/initramfs-scripts.bst
new file mode 100644
index 00000000..b29d9892
--- /dev/null
+++ b/elements/initramfs/initramfs-scripts.bst
@@ -0,0 +1,4 @@
+kind: import
+sources:
+- kind: local
+  path: files/initramfs
diff --git a/elements/initramfs/initramfs.bst b/elements/initramfs/initramfs.bst
new file mode 100644
index 00000000..bf82a409
--- /dev/null
+++ b/elements/initramfs/initramfs.bst
@@ -0,0 +1,13 @@
+kind: compose
+description: Initramfs composition
+depends:
+- filename: gnu-toolchain.bst
+  type: build
+- filename: initramfs/initramfs-scripts.bst
+  type: build
+
+config:
+  include:
+  - runtime
+
+