examples: lang: Update examples to fix imports and port from yaml

Some small fixes that are useful for demos!

examples/lang/autoedges1.mcl

@@ -0,0 +1,30 @@
+pkg "drbd-utils" {
+	state => "installed",
+
+	Meta:autoedge => true,
+	Meta:noop => true,
+}
+
+file "/etc/drbd.conf" {
+	content => "this is an mgmt test",
+	state => "exists",
+
+	Meta:autoedge => true,
+	Meta:noop => true,
+}
+
+file "/etc/drbd.d/" {
+	source => "/dev/null",
+	state => "exists",
+
+	Meta:autoedge => true,
+	Meta:noop => true,
+}
+
+# note that the autoedges between the files and the svc don't exist yet :(
+svc "drbd" {
+	state => "stopped",
+
+	Meta:autoedge => true,
+	Meta:noop => true,
+}

examples/lang/autogroup1.mcl

@@ -0,0 +1,17 @@
+pkg "powertop" {
+	state => "installed",
+
+	Meta:autogroup => true,
+}
+
+pkg "sl" {
+	state => "installed",
+
+	Meta:autogroup => true,
+}
+
+pkg "cowsay" {
+	state => "installed",
+
+	Meta:autogroup => true,
+}

examples/lang/datetime3.mcl

@@ -1,5 +1,6 @@
 import "datetime"
 import "sys"
+import "example"
 
 $secplusone = datetime.now() + $ayear
 
@@ -10,7 +11,7 @@ $tmplvalues = struct{year => $secplusone, load => $theload, vumeter => $vumeter,
 
 $theload = structlookup(sys.load(), "x1")
 
-$vumeter = vumeter("====", 10, 0.9)
+$vumeter = example.vumeter("====", 10, 0.9)
 
 file "/tmp/mgmt/datetime" {
 	content => template("Now + 1 year is: {{ .year }} seconds, aka: {{ datetime_print .year }}\n\nload average: {{ .load }}\n\nvu: {{ .vumeter }}\n", $tmplvalues),

examples/lang/hysteresis1.mcl

@@ -1,10 +1,12 @@
+import "sys"
+
 file "/tmp/mgmt/systemload" {
 	content => template("load average: {{ .load }} threshold: {{ .threshold }}\n", $tmplvalues),
 }
 
 $tmplvalues = struct{load => $theload, threshold => $threshold,}
 
-$theload = structlookup(load(), "x1")
+$theload = structlookup(sys.load(), "x1")
 $threshold = 1.5	# change me if you like
 
 # simple hysteresis implementation