Add Jinja whitespace control

crates/weaver_forge/README.md

@@ -34,9 +34,9 @@ templates/
     html/                   <-- Templates to generate the semantic conventions in HTML
       ...
     markdown/               <-- Templates to generate the semantic conventions in markdown
-      ... 
+      ...
     rust/                   <-- Templates to generate the semantic conventions in Rust
-      ...  
+      ...
     go/                     <-- Templates to generate the semantic conventions in Go
       ...
   schema/
@@ -78,6 +78,7 @@ documentation for more details.
 ## Global Variables
 
 All templates have access to the following global variables:
+
 - `ctx`: The context object that contains the resolved registry or the output of
 the JQ filter if defined in the `weaver.yaml` configuration file.
 - `params`: The parameters defined in the `weaver.yaml` configuration file or overridden
@@ -130,12 +131,13 @@ Jinja templates can also access the parameters:
 ## Jinja Filters
 
 All the filters available in the MiniJinja template engine are available (see
-this online [documentation](https://docs.rs/minijinja/latest/minijinja/filters/index.html)). 
+this online [documentation](https://docs.rs/minijinja/latest/minijinja/filters/index.html)).
 
 In addition, OTel Weaver provides a set of custom filters to facilitate the
 generation of documentation and code.
 
 The following filters are available:
+
 - `lower_case`: Converts a string to lowercase.
 - `upper_case`: Converts a string to UPPERCASE.
 - `title_case`: Converts a string to TitleCase.
@@ -146,7 +148,7 @@ The following filters are available:
 - `kebab_case`: Converts a string to kebab-case.
 - `screaming_kebab_case`: Converts a string to SCREAMING-KEBAB-CASE.
 - `capitalize_first`: Capitalizes the first letter of a string.
-- `kebab_case_const`: Generates kebab-case constants which follow semantic convention namespacing rules (underscores are ignored, but . is meaningful). 
+- `kebab_case_const`: Generates kebab-case constants which follow semantic convention namespacing rules (underscores are ignored, but . is meaningful).
 - `pascal_case_const`: Generates PascalCase constants which follow semantic convention namespacing rules (underscores are ignored, but . is meaningful).
 - `camel_case_const`: Generates camelCase constants which follow semantic convention namespacing rules (underscores are ignored, but . is meaningful).
 - `snake_case_const`: Generates snake_case constants which follow semantic convention namespacing rules (underscores are ignored, but . is meaningful).
@@ -165,7 +167,7 @@ e.g. \[\[a,b\],\[c\]\] => \[a,b,c\]
 - `attribute_namespace`: Converts {namespace}.{attribute_id} to {namespace}.
 - `required`: Filters a list of `Attribute`s to include only the required attributes. The "conditionally_required" attributes are not returned by this filter.
 - `not_required`: Filters a list of `Attribute`s to only include non-required attributes. The "conditionally_required" attributes are returned by this filter.
-- `instantiated_type`: Filters a type to return the instantiated type. 
+- `instantiated_type`: Filters a type to return the instantiated type.
 - `enum_type`: Filters a type to return the enum type or an error if the type is not an enum.
 - `markdown_to_html`: Converts a markdown string to an HTML string.
 - `map_text`: Converts an input into a string based on the `text_maps` section of the `weaver.yaml` configuration file
@@ -212,7 +214,7 @@ value if the name of the text map or the input are not found in the `text_maps`
 
 ## Jinja Functions
 
-All the functions available in the MiniJinja template engine are available (see 
+All the functions available in the MiniJinja template engine are available (see
 this online [documentation](https://docs.rs/minijinja/latest/minijinja/functions/index.html)).
 
 Right now, OTel Weaver does not provide any custom functions but feel free to

crates/weaver_forge/src/config.rs

@@ -253,6 +253,15 @@ pub struct TemplateSyntax {
     /// The end of a comment.
     #[serde(default = "default_comment_end")]
     pub comment_end: String,
+    /// Configures the behavior of the first newline after a block.
+    /// See https://docs.rs/minijinja/latest/minijinja/struct.Environment.html#method.set_trim_blocks
+    #[serde(default = "default_trim_blocks")]
+    pub trim_blocks: bool,
+    /// Configures the behavior of the first newline after a block.
+    /// Configures the behavior of leading spaces and tabs from the start of a line to a block.
+    /// See https://docs.rs/minijinja/latest/minijinja/struct.Environment.html#method.set_lstrip_blocks
+    #[serde(default = "default_lstrip_blocks")]
+    pub lstrip_blocks: bool,
 }
 
 /// Default block start delimiter.
@@ -285,6 +294,16 @@ fn default_comment_end() -> String {
     "#}".to_owned()
 }
 
+/// Default trim_blocks behavior.
+fn default_trim_blocks() -> bool {
+    false
+}
+
+/// Default lstrip_blocks behavior.
+fn default_lstrip_blocks() -> bool {
+    false
+}
+
 impl Default for TemplateSyntax {
     fn default() -> Self {
         TemplateSyntax {
@@ -294,6 +313,8 @@ impl Default for TemplateSyntax {
             variable_end: default_variable_end(),
             comment_start: default_comment_start(),
             comment_end: default_comment_end(),
+            trim_blocks: default_trim_blocks(),
+            lstrip_blocks: default_lstrip_blocks()
         }
     }
 }

crates/weaver_forge/src/lib.rs

@@ -456,6 +456,11 @@ impl TemplateEngine {
         });
         env.set_syntax(syntax);
 
+        // Jinja whitespace control
+        // https://docs.rs/minijinja/latest/minijinja/syntax/index.html#whitespace-control
+        env.set_trim_blocks(template_syntax.trim_blocks);
+        env.set_lstrip_blocks(template_syntax.lstrip_blocks);
+
         code::add_filters(&mut env, &self.target_config);
         ansi::add_filters(&mut env);
         case::add_filters(&mut env, &self.target_config);
@@ -682,4 +687,44 @@ mod tests {
 
         assert!(diff_dir("expected_output", "observed_output").unwrap());
     }
+
+    #[test]
+    fn test_whitespace_control() {
+        let logger = TestLogger::default();
+        let loader = FileSystemFileLoader::try_new("templates/test".into(), "whitespace_control")
+            .expect("Failed to create file system loader");
+        let engine = super::TemplateEngine::try_new(loader, Params::default())
+            .expect("Failed to create template engine");
+
+        let registry_id = "default";
+        let mut registry = SemConvRegistry::try_from_path_pattern(registry_id, "data/*.yaml")
+            .expect("Failed to load registry");
+        let schema = SchemaResolver::resolve_semantic_convention_registry(&mut registry)
+            .expect("Failed to resolve registry");
+
+        let template_registry = ResolvedRegistry::try_from_resolved_registry(
+            schema.registry(registry_id).expect("registry not found"),
+            schema.catalog(),
+        )
+        .unwrap_or_else(|e| {
+            panic!(
+                "Failed to create the context for the template evaluation: {:?}",
+                e
+            )
+        });
+
+        engine
+            .generate(
+                logger.clone(),
+                &template_registry,
+                Path::new("templates/test/whitespace_control/observed_output"),
+                &OutputDirective::File,
+            )
+            .inspect_err(|e| {
+                print_dedup_errors(logger.clone(), e.clone());
+            })
+            .expect("Failed to generate registry assets");
+
+        assert!(diff_dir("templates/test/whitespace_control/expected_output", "templates/test/whitespace_control/observed_output").unwrap());
+    }
 }

crates/weaver_forge/templates/test/whitespace_control/expected_output/registry.md

@@ -0,0 +1,56 @@
+# Semantic Convention Registry
+
+Url:
+
+## Attribute Groups
+
+- [attributes.jvm.memory](attribute_group/attributes_jvm_memory.md)
+- [registry.db](attribute_group/registry_db.md)
+- [registry.http](attribute_group/registry_http.md)
+- [registry.network](attribute_group/registry_network.md)
+- [server](attribute_group/server.md)
+- [registry.url](attribute_group/registry_url.md)
+- [registry.user_agent](attribute_group/registry_user_agent.md)
+
+## Events
+
+- [ios.lifecycle.events](event/ios_lifecycle_events.md)
+- [android.lifecycle.events](event/android_lifecycle_events.md)
+
+## Metrics
+
+- [metric.jvm.memory.used](metric/metric_jvm_memory_used.md)
+- [metric.jvm.memory.committed](metric/metric_jvm_memory_committed.md)
+- [metric.jvm.memory.limit](metric/metric_jvm_memory_limit.md)
+- [metric.jvm.memory.used_after_last_gc](metric/metric_jvm_memory_used_after_last_gc.md)
+- [metric.jvm.gc.duration](metric/metric_jvm_gc_duration.md)
+- [metric.jvm.thread.count](metric/metric_jvm_thread_count.md)
+- [metric.jvm.class.loaded](metric/metric_jvm_class_loaded.md)
+- [metric.jvm.class.unloaded](metric/metric_jvm_class_unloaded.md)
+- [metric.jvm.class.count](metric/metric_jvm_class_count.md)
+- [metric.jvm.cpu.count](metric/metric_jvm_cpu_count.md)
+- [metric.jvm.cpu.time](metric/metric_jvm_cpu_time.md)
+- [metric.jvm.cpu.recent_utilization](metric/metric_jvm_cpu_recent_utilization.md)
+
+## Metric Groups
+
+## Resource
+
+- [otel.scope](resource/otel_scope.md)
+- [otel.library](resource/otel_library.md)
+
+## Scope
+
+## Span
+
+- [db](span/db.md)
+- [db.mssql](span/db_mssql.md)
+- [db.cassandra](span/db_cassandra.md)
+- [db.hbase](span/db_hbase.md)
+- [db.couchdb](span/db_couchdb.md)
+- [db.redis](span/db_redis.md)
+- [db.mongodb](span/db_mongodb.md)
+- [db.elasticsearch](span/db_elasticsearch.md)
+- [db.sql](span/db_sql.md)
+- [db.cosmosdb](span/db_cosmosdb.md)
+- [db.tech](span/db_tech.md)

crates/weaver_forge/templates/test/whitespace_control/registry.md

@@ -0,0 +1,57 @@
+# Semantic Convention Registry
+
+Url:{{ registry_url }}
+
+## Attribute Groups
+
+{% for group in ctx.groups %}
+{% if group.type == "attribute_group" %}
+- [{{ group.id }}](attribute_group/{{ group.id | file_name }}.md)
+{% endif %}
+{% endfor %}
+
+## Events
+
+{% for group in ctx.groups %}
+{% if group.type == "event" %}
+- [{{ group.id }}](event/{{ group.id | file_name }}.md)
+  {% endif %}
+  {% endfor %}
+
+## Metrics
+
+{% for group in ctx.groups %}
+{% if group.type == "metric" %}
+- [{{ group.id }}](metric/{{ group.id | file_name }}.md)
+{% endif %}
+{% endfor %}
+
+## Metric Groups
+{% for group in ctx.groups %}
+{% if group.type == "metric_group" %}
+- [{{ group.id }}](metric_group/{{ group.id | file_name }}.md)
+  {% endif %}
+  {% endfor %}
+
+## Resource
+
+{% for group in ctx.groups %}
+{% if group.type == "resource" %}
+- [{{ group.id }}](resource/{{ group.id | file_name }}.md)
+  {% endif %}
+  {% endfor %}
+
+## Scope
+{% for group in ctx.groups %}
+{% if group.type == "scope" %}
+- [{{ group.id }}](scope/{{ group.id | file_name }}.md)
+  {% endif %}
+  {% endfor %}
+
+## Span
+
+{% for group in ctx.groups %}
+{% if group.type == "span" %}
+- [{{ group.id }}](span/{{ group.id | file_name }}.md)
+  {% endif %}
+  {% endfor %}

crates/weaver_forge/templates/test/whitespace_control/weaver.yaml

@@ -0,0 +1,21 @@
+file_name: snake_case
+function_name: PascalCase
+arg_name: camelCase
+struct_name: PascalCase
+field_name: PascalCase
+
+type_mapping:
+  int: int64
+  double: double
+  boolean: bool
+  string: string
+  "int[]": "[]int64"
+  "double[]": "[]double"
+  "boolean[]": "[]bool"
+  "string[]": "[]string"
+
+acronyms: ["iOS", "API", "URL"]
+
+template_syntax:
+  trim_blocks: true
+  lstrip_blocks: true

docs/weaver-config.md

@@ -16,7 +16,7 @@ following options:
 #    double: doubleKey
 #    boolean: booleanKey
 #    string: stringKey
-    
+
 # Deprecated, please use text_maps instead
 # Configuration of the type mapping. This is useful to generate code in a
 # specific language. This is optional.
@@ -33,7 +33,8 @@ following options:
 #  "string[]": "[]string"
 #  ...
 
-# Uncomment this section to specify the configuration of the Jinja template syntax.
+# Uncomment this section to specify the configuration of the Jinja template syntax
+# and control whitespace behavior.
 # Note: The default syntax is strongly recommended.
 #template_syntax:
 #  block_start: "{%"
@@ -42,6 +43,8 @@ following options:
 #  variable_end: "}}"
 #  comment_start: "{#"
 #  comment_end: "#}"
+#  trim_blocks: false
+#  lstrip_blocks: false
 
 # Uncomment the following section to specify a list of acronyms that
 # will be interpreted by the acronym filter. This is optional.
@@ -52,7 +55,7 @@ following options:
 # params:
 #  param1: val1
 #  param2: val2
-  
+
 # Uncomment the following templates to override the default template
 # mapping. Each template mapping specifies a jaq filter (compatible with jq)
 # to apply to every file matching the pattern. The application_mode specifies