feat: Allow user to use source images (#69)

src/module_recipe.rs

@@ -245,6 +245,10 @@ pub struct Module<'a> {
     #[serde(rename = "from-file", skip_serializing_if = "Option::is_none")]
     pub from_file: Option<Cow<'a, str>>,
 
+    #[builder(default, setter(into, strip_option))]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub source: Option<Cow<'a, str>>,
+
     #[serde(flatten)]
     #[builder(default, setter(into))]
     pub config: IndexMap<String, Value>,

templates/Containerfile

@@ -75,7 +75,11 @@ RUN \
 	--mount=type=tmpfs,target=/tmp \
 	--mount=type=tmpfs,target=/var \
 	--mount=type=bind,from=stage-config,src=/config,dst=/tmp/config,rw \
+			{%- if let Some(source) = module.source %}
+	--mount=type=bind,from={{ source }},src=/modules,dst=/tmp/modules,rw \
+			{%- else %}
 	--mount=type=bind,from=stage-modules,src=/modules,dst=/tmp/modules,rw \
+			{%- endif %}
 	--mount=type=bind,from=stage-exports,src=/exports.sh,dst=/tmp/exports.sh \
 	chmod +x /tmp/modules/{{ type }}/{{ type }}.sh \
 	&& source /tmp/exports.sh && /tmp/modules/{{ type }}/{{ type }}.sh '{{ self::print_module_context(module) }}'