Re-add elemental package (#449)

packages/system/elemental/build.yaml

@@ -0,0 +1,20 @@
+requires:
+  - name: "toolchain-go"
+    category: "development"
+    version: ">=0"
+env:
+  - PATH=$PATH:/usr/local/go/bin
+  - CGO_ENABLED=0
+  - REPO={{( index .Values.labels "github.repo" )}}
+
+prelude:
+  - PACKAGE_VERSION=${PACKAGE_VERSION%\+*} && git clone --branch v"${PACKAGE_VERSION}" https://github.com/{{( index .Values.labels "github.owner" )}}/$REPO
+
+steps:
+  - |
+    cd $REPO && GIT_COMMIT=$(git rev-parse HEAD) && \
+    go build -o bin/{{.Values.bin_name}} -ldflags "-s -w -X 'github.com/rancher/elemental-cli/internal/version.version=v${PACKAGE_VERSION}' -X 'github.com/rancher/elemental-cli/internal/version.gitCommit=${GIT_COMMIT}'" && \
+    mv bin/{{.Values.bin_name}} /usr/bin/{{.Values.bin_name}}
+
+includes:
+  - /usr/bin/{{.Values.bin_name}}

packages/system/elemental/definition.yaml

@@ -0,0 +1,8 @@
+name: "elemental-cli"
+category: "system"
+version: "0.3.1"
+bin_name: "elemental"
+fips: false
+labels:
+  github.repo: "elemental-cli"
+  github.owner: "kairos-io"