breakout tmpl from configgen; stage variations/platform feat

demo/spec/xyz/ex-core-r/xyz1-ex-core-r101.yaml

@@ -1,2 +1,2 @@
 device:
-  hostname: xyz1-ex-edge-r201
+  hostname: xyz1-ex-core-r101

demo/spec/xyz/ex-core-r/xyz1-ex-core-r102.yaml

@@ -1,2 +1,2 @@
 device:
-  hostname: xyz1-ex-edge-r202
+  hostname: xyz1-ex-core-r102

demo/spec/xyz/ex-core-r/xyz2-ex-core-r101.yaml

@@ -1,2 +1,2 @@
 device:
-  hostname: xyz2-ex-edge-r201
+  hostname: xyz2-ex-core-r101

demo/spec/xyz/ex-core-r/xyz2-ex-core-r102.yaml

@@ -1,2 +1,2 @@
 device:
-  hostname: xyz2-ex-edge-r202
+  hostname: xyz2-ex-core-r202

demo/spec/xyz/ex-edge-r/xyz1-ex-edge-r101.yaml

@@ -1,2 +1,3 @@
 device:
   hostname: xyz1-ex-edge-r101
+  live: true

demo/tmpl/ex-edge-r/policy-options.tera

@@ -0,0 +1,29 @@
+policy-options {
+    policy-statement EXPORT-POLICY {
+        term ADVERTISE {
+            from protocol bgp;
+            then {
+              community add LOCAL-REGION;
+              accept;
+            }
+        }
+    }
+    policy-statement IMPORT-POLICY {
+        term ACCEPT-ALL {
+            then accept;
+        }
+    }
+    policy-statement SHIFTED {
+        term DEPRIORITIZE {
+            from {
+                protocol bgp;
+            }
+            then {
+                community add SHIFTED-OUT;
+                next policy;
+            }
+        }
+    }
+    community LOCAL-REGION members 64500:200;
+    community SHIFTED-OUT members [ 64500:200 64500:200 64500:200 ];
+}

demo/tmpl/ex-edge-r/protocols.tera

@@ -1,3 +1,14 @@
 protocols {
-    {{ protocol }};
+    bgp {
+        group UPSTREAM {
+            type external;
+            peer-as 64500;
+            import IMPORT-POLICY;
+{%- if live %}
+            export EXPORT-POLICY;
+{%- else %}
+            export [ SHIFTED EXPORT-POLICY ];
+{%- endif %}
+        }
+    }
 }

demo/tmpl/ex-edge-r/structure.yaml

@@ -2,3 +2,9 @@ files:
   - system
   - interfaces
   - protocols
+  - policy-options
+platform: junos
+variations:
+  - live
+  - shifted
+  - init

demo/tmpl/ex-edge-r/system.tera

@@ -1,8 +1,18 @@
 system {
-    hostname {{ hostname }};
-    location "{{ location }}";
-    zone {{ zone }};
-    users {
-      {{ username }};
+    /* location "{{ location }}" zone {{ zone }} */
+    host-name {{ hostname }};
+    system {
+        login {
+{%- if init %}
+            user bootstrap {
+                uid 2000;
+                class super-user;
+            }
+{%- endif %}
+            user {{ username }} {
+                uid 2001;
+                class super-user;
+            }
+        }
     }
 }

src/main.rs

@@ -1,13 +1,14 @@
 mod cli;
 mod log;
-mod specs;
-mod tmpls;
+mod render;
+mod spec;
+mod tmpl;
 
 use log::LogLevel;
+use render::RenderedConfig;
 use std::fs::{self, File, OpenOptions, create_dir_all, write};
 use std::io::Write;
 use std::path::Path;
-use tmpls::RenderedConfig;
 use yaml_serde;
 
 fn main() {
@@ -16,11 +17,14 @@ fn main() {
 
     dbug!(dbg, "{:#?}", &args);
 
-    let specifications: Vec<specs::Specification> =
-        specs::compile(&args.devices, &args.env.spec_path, dbg);
+    let specifications: Vec<spec::Specification> =
+        spec::compile(&args.devices, &args.env.spec_path, dbg);
 
     for spec in specifications {
-        let result = RenderedConfig::from_spec(&spec, dbg).ok().unwrap();
+        let result = RenderedConfig::from_spec(&spec, dbg).unwrap_or_else(|e| {
+            eprintln!("{}", e);
+            std::process::exit(1);
+        });
         output_rendered_configs(result, &args.env.out_path, dbg)
     }
 }

src/render.rs

@@ -1,14 +1,9 @@
-use crate::specs::Specification;
+use crate::spec::Specification;
+use crate::tmpl;
 use crate::{LogLevel, info, verb};
 use serde_json::Value;
 use std::fs;
 use tera::{Context, Tera};
-use yaml_serde;
-
-#[derive(serde::Deserialize)]
-struct TemplateConfig {
-    files: Vec<String>,
-}
 
 pub struct RenderedConfig {
     pub hostname: String,
@@ -43,19 +38,16 @@ impl RenderedConfig {
 
         let base_dir = std::path::Path::new("./tmpl").join(spec.get_layer());
 
-        // Read structure.yaml
         let structure_path = base_dir.join("structure.yaml");
-        let structure_data = fs::read_to_string(&structure_path)
-            .map_err(|e| format!("Failed to read {}: {}", structure_path.display(), e))?;
-
-        let config_meta: TemplateConfig = yaml_serde::from_str(&structure_data)?;
+        let structure = tmpl::Structure::from_file(&structure_path)
+            .map_err(|e| format!("Failed to parse {}: {}", structure_path.display(), e))?;
 
         let mut tera = Tera::default();
         let mut configs = Vec::new();
 
         info!(dbg, "Rendering {}", hostname);
 
-        let template_data: Vec<(String, String)> = config_meta
+        let template_data: Vec<(String, String)> = structure
             .files
             .iter()
             .filter_map(|name| {
@@ -72,7 +64,7 @@ impl RenderedConfig {
 
         tera.add_raw_templates(template_data)?;
 
-        for template_name in &config_meta.files {
+        for template_name in &structure.files {
             verb!(dbg, " | {}", &template_name);
             if !tera.get_template_names().any(|n| n == template_name) {
                 continue;

src/tmpl.rs

@@ -0,0 +1,19 @@
+use serde::Deserialize;
+use yaml_serde;
+
+#[derive(Deserialize)]
+pub struct Structure {
+    pub files: Vec<String>,
+    #[allow(dead_code)] //todo
+    pub platform: String,
+    #[allow(dead_code)] //todo
+    pub variations: Vec<String>,
+}
+
+impl Structure {
+    pub fn from_file(path: &std::path::Path) -> Result<Self, Box<dyn std::error::Error>> {
+        let data =
+            std::fs::read_to_string(path).map_err(|e| format!("{}: {}", path.display(), e))?;
+        Ok(yaml_serde::from_str(&data)?)
+    }
+}