Allow to finalizer to specify entrypoint command

In this way, finalizer in strict environment can override the default
shell used to run commands.

The shell keyword is a list, as it needs to contain the full command +
args.

pkg/installer/finalizer.go

@@ -26,23 +26,37 @@ import (
 )
 
 type LuetFinalizer struct {
+	Shell     []string `json:"shell"`
 	Install   []string `json:"install"`
 	Uninstall []string `json:"uninstall"` // TODO: Where to store?
 }
 
 func (f *LuetFinalizer) RunInstall(s *System) error {
-	for _, c := range f.Install {
+	var cmd string
-		if s.Target == "/" {
+	var args []string
+	if len(f.Shell) == 0 {
+		// Default to sh otherwise
+		cmd = "sh"
+		args = []string{"-c"}
+	} else {
+		cmd = f.Shell[0]
+		if len(f.Shell) > 1 {
+			args = f.Shell[1:]
+		}
+	}
 
-			Info("finalizer on / :", "sh", "-c", c)
+	for _, c := range f.Install {
-			cmd := exec.Command("sh", "-c", c)
+		toRun := append(args, c)
+		Info("Executing finalizer on ", s.Target, cmd, toRun)
+		if s.Target == "/" {
+			cmd := exec.Command(cmd, toRun...)
 			stdoutStderr, err := cmd.CombinedOutput()
 			if err != nil {
 				return errors.Wrap(err, "Failed running command: "+string(stdoutStderr))
 			}
 			Info(string(stdoutStderr))
 		} else {
-			b := box.NewBox("sh", []string{"-c", c}, s.Target, false, true, true)
+			b := box.NewBox(cmd, toRun, s.Target, false, true, true)
 			err := b.Run()
 			if err != nil {
 				return errors.Wrap(err, "Failed running command ")

tests/fixtures/finalizer_custom/build.yaml

@@ -0,0 +1,4 @@
+image: "alpine"
+unpack: true
+steps:
+- apk update && apk add bash

tests/fixtures/finalizer_custom/definition.yaml

@@ -0,0 +1,3 @@
+category: "seed"
+name: "alpine"
+version: "2.0"

tests/fixtures/finalizer_custom/finalize.yaml

@@ -0,0 +1,5 @@
+shell:
+- bash
+- -c
+install:
+- echo "$BASH" > /tmp/foo

tests/fixtures/finalizers/alpine/finalize.yaml

@@ -1,2 +1,2 @@
 install:
-- touch /tmp/foo
+- echo "$0" > /tmp/foo

tests/integration/07_finalizer.sh

@@ -61,6 +61,7 @@ testInstall() {
     assertEquals 'install test successfully' "$installst" "0"
     assertTrue 'package installed' "[ -e '$tmpdir/testrootfs/bin/busybox' ]"
     assertTrue 'finalizer runs' "[ -e '$tmpdir/testrootfs/tmp/foo' ]"
+    assertEquals 'finalizer printed used shell' "$(cat $tmpdir/testrootfs/tmp/foo)" 'sh'
 }
 
 

tests/integration/07_finalizer_custom.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+export LUET_NOLOCK=true
+
+oneTimeSetUp() {
+export tmpdir="$(mktemp -d)"
+}
+
+oneTimeTearDown() {
+    rm -rf "$tmpdir"
+}
+
+testBuild() {
+    mkdir $tmpdir/testbuild
+    luet build --tree "$ROOT_DIR/tests/fixtures/finalizer_custom" --destination $tmpdir/testbuild --compression gzip --all > /dev/null
+    buildst=$?
+    assertEquals 'builds successfully' "$buildst" "0"
+    assertTrue 'create package' "[ -e '$tmpdir/testbuild/alpine-seed-2.0.package.tar.gz' ]"
+}
+
+testRepo() {
+    assertTrue 'no repository' "[ ! -e '$tmpdir/testbuild/repository.yaml' ]"
+    luet create-repo --tree "$ROOT_DIR/tests/fixtures/finalizer_custom" \
+    --output $tmpdir/testbuild \
+    --packages $tmpdir/testbuild \
+    --name "test" \
+    --descr "Test Repo" \
+    --urls $tmpdir/testrootfs \
+    --type disk > /dev/null
+
+    createst=$?
+    assertEquals 'create repo successfully' "$createst" "0"
+    assertTrue 'create repository' "[ -e '$tmpdir/testbuild/repository.yaml' ]"
+}
+
+testConfig() {
+    mkdir $tmpdir/testrootfs
+    cat <<EOF > $tmpdir/luet.yaml
+general:
+  debug: true
+system:
+  rootfs: $tmpdir/testrootfs
+  database_path: "/"
+  database_engine: "boltdb"
+repositories:
+   - name: "main"
+     type: "disk"
+     enable: true
+     urls:
+       - "$tmpdir/testbuild"
+EOF
+    luet config --config $tmpdir/luet.yaml
+    res=$?
+    assertEquals 'config test successfully' "$res" "0"
+}
+
+testInstall() {
+    luet install --config $tmpdir/luet.yaml seed/alpine
+    #luet install --config $tmpdir/luet.yaml test/c-1.0 > /dev/null
+    installst=$?
+    assertEquals 'install test successfully' "$installst" "0"
+    assertTrue 'package installed' "[ -e '$tmpdir/testrootfs/bin/busybox' ]"
+    assertTrue 'finalizer runs' "[ -e '$tmpdir/testrootfs/tmp/foo' ]"
+    assertContains 'finalizer printed used shell' "$(cat $tmpdir/testrootfs/tmp/foo)" '/bin/bash'
+}
+
+
+testCleanup() {
+    luet cleanup --config $tmpdir/luet.yaml
+    installst=$?
+    assertEquals 'install test successfully' "$installst" "0"
+}
+
+# Load shUnit2.
+. "$ROOT_DIR/tests/integration/shunit2"/shunit2
+