additional error handling; use path buffers; improve logic

Cargo.lock

@@ -76,6 +76,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.101"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f0e0fee31ef5ed1ba1316088939cea399010ed7731dba877ed44aeb407a75ea"
+
 [[package]]
 name = "autocfg"
 version = "1.4.0"
@@ -269,25 +275,9 @@ dependencies = [
 
 [[package]]
 name = "equivalent"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
-
-[[package]]
-name = "errno"
-version = "0.3.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33d852cb9b869c2a9b3df2f71a3074817f01e1844f839a144f5fcef059a4eb5d"
-dependencies = [
- "libc",
- "windows-sys",
-]
-
-[[package]]
-name = "fastrand"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "generic-array"
@@ -307,19 +297,7 @@ checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
-]
-
-[[package]]
-name = "getrandom"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43a49c392881ce6d5c3b8cb70f98717b7c07aabbdff06687b9030dbfbe2725f8"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi 0.13.3+wasi-0.2.2",
- "windows-targets",
 ]
 
 [[package]]
@@ -348,9 +326,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.15.2"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf151400ff0baff5465007dd2f3e717f3fe502074ca563069ce3a6629d07b289"
+checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
 [[package]]
 name = "humansize"
@@ -402,9 +380,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.7.1"
+version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c9c992b02b5b4c94ea26e32fe5bccb7aa7d9f390ab5c1221ff895bc7ea8b652"
+checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -450,18 +428,6 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8355be11b20d696c8f18f6cc018c4e372165b1fa8126cef092399c9951984ffa"
 
-[[package]]
-name = "libyml"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e281a65eeba3d4503a2839252f86374528f9ceafe6fed97c1d3b52e1fb625c1"
-
-[[package]]
-name = "linux-raw-sys"
-version = "0.4.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d26c52dbd32dccf2d10cac7725f8eae5296885fb5703b261f7d0a0739ec807ab"
-
 [[package]]
 name = "log"
 version = "0.4.25"
@@ -641,7 +607,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom 0.2.15",
+ "getrandom",
 ]
 
 [[package]]
@@ -673,19 +639,6 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
-[[package]]
-name = "rustix"
-version = "0.38.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdb5bc1ae2baa591800df16c9ca78619bf65c0488b41b96ccec5d11220d8c154"
-dependencies = [
- "bitflags",
- "errno",
- "libc",
- "linux-raw-sys",
- "windows-sys",
-]
-
 [[package]]
 name = "rustversion"
 version = "1.0.19"
@@ -739,23 +692,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_yml"
-version = "0.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ce6afeda22f0b55dde2c34897bce76a629587348480384231205c14b59a01f"
-dependencies = [
- "indexmap",
- "itoa",
- "libyml",
- "log",
- "memchr",
- "ryu",
- "serde",
- "serde_json",
- "tempfile",
-]
-
 [[package]]
 name = "sha2"
 version = "0.10.8"
@@ -783,14 +719,15 @@ checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
 name = "skyforge"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "clap",
  "regex",
  "serde",
  "serde_json",
- "serde_yml",
  "tera",
  "thiserror 1.0.69",
  "walkdir",
+ "yaml_serde",
 ]
 
 [[package]]
@@ -820,20 +757,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "tempfile"
-version = "3.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38c246215d7d24f48ae091a2902398798e05d978b24315d6efbc00ede9a8bb91"
-dependencies = [
- "cfg-if",
- "fastrand",
- "getrandom 0.3.1",
- "once_cell",
- "rustix",
- "windows-sys",
-]
-
 [[package]]
 name = "tera"
 version = "1.20.0"
@@ -964,6 +887,12 @@ version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a210d160f08b701c8721ba1c726c11662f877ea6b7094007e1ca9a1041945034"
 
+[[package]]
+name = "unsafe-libyaml"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.2"
@@ -992,15 +921,6 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
-[[package]]
-name = "wasi"
-version = "0.13.3+wasi-0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26816d2e1a4a36a2940b96c5296ce403917633dff8f3440e9b236ed6f6bacad2"
-dependencies = [
- "wit-bindgen-rt",
-]
-
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.100"
@@ -1151,12 +1071,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
-name = "wit-bindgen-rt"
+name = "yaml_serde"
-version = "0.33.0"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3268f3d866458b787f390cf61f4bbb563b922d091359f9608842999eaee3943c"
+checksum = "4a7f5270edc6fab0529a772a772b3e505dfd883a8de5cc5b464e35fabe586411"
 dependencies = [
- "bitflags",
+ "indexmap",
+ "itoa",
+ "ryu",
+ "serde",
+ "unsafe-libyaml",
 ]
 
 [[package]]

Cargo.toml

@@ -1,14 +1,15 @@
 [package]
 name = "skyforge"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
-clap = { version = "4.5.11" }
+anyhow = "1"
-regex = "1.10.5"
+clap = { version = "4.5" }
-serde = { version = "1.0", features = ["derive"] }
+regex = "1"
-serde_yml = "0.0.10"
+serde = { version = "1", features = ["derive"] }
-serde_json = "1.0.112"
+serde_json = "1"
-tera = "1.20.0"
+yaml_serde = "0"
-thiserror = "1.0"
+tera = "1"
-walkdir = "2.3"
+thiserror = "1"
+walkdir = "2"

demo/spec/xyz/common/ex.yaml

@@ -1,3 +1,3 @@
 regional:
-    partition: us
+  partition: us
-    username: netadmin
+  username: netadmin

demo/spec/xyz/ex-core-r/common.yaml

@@ -0,0 +1,5 @@
+common:
+  partition: us
+  layer: ex-core-r
+  protocol: ospf
+  uplink: et-0/0/36

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

@@ -0,0 +1,2 @@
+zonal:
+  zone: 1

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

@@ -0,0 +1,2 @@
+zonal:
+  zone: 2

demo/spec/xyz/ex-edge-r/common.yaml

@@ -0,0 +1,4 @@
+common:
+  layer: ex-edge-r
+  protocol: bgp
+  uplink: et-0/0/0

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

@@ -0,0 +1,2 @@
+zonal:
+  zone: 1

demo/spec/xyz/ex-edge-r/xyz2.common.yaml

@@ -0,0 +1,2 @@
+zonal:
+  zone: 2

demo/spec/xyz/ex-edge-r/xyz5-ex-edge-r101.yaml

@@ -0,0 +1,8 @@
+device:
+  zone: 5
+  hostname: xyz5-ex-edge-r101
+  uplinks:
+    - xe-0/0/1
+    - xe-0/0/2
+    - xe-0/0/3
+    - xe-0/0/4

demo/spec/xyz/ex-edge-r1/common.yaml

@@ -1,4 +0,0 @@
-common:
-    layer: ex-edge-r
-    protocol: bgp
-    uplink: et-0/0/0

demo/spec/xyz/ex-edge-r1/xyz1.common.yaml

@@ -1,2 +0,0 @@
-zonal:
-    zone: 1

demo/spec/xyz/ex-edge-r1/xyz2.common.yaml

@@ -1,2 +0,0 @@
-zonal:
-    zone: 2

demo/spec/xyz/ex-edge-r2/common.yaml

@@ -1,5 +0,0 @@
-common:
-    partition: eu
-    layer: ex-edge-r
-    protocol: ospf
-    uplink: et-0/0/36

demo/spec/xyz/ex-edge-r2/xyz1.common.yaml

@@ -1,2 +0,0 @@
-zonal:
-  az: 1

demo/spec/xyz/ex-edge-r2/xyz2.common.yaml

@@ -1,2 +0,0 @@
-zonal:
-  az: 2

demo/tmpl/ex-core-r

@@ -0,0 +1 @@
+ex-edge-r/

demo/tmpl/ex-edge-r/chassis.tmpl

@@ -1,5 +0,0 @@
-chassis {
-    users {
-        {{ username }};
-    }
-}

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

@@ -0,0 +1,8 @@
+interfaces {
+{%- set interfaces = uplinks | default(value=[uplink]) %}
+{%- for interace in interfaces %}
+    {{ interace }} {
+        unit 0 family inet dhcp;
+    }
+{%- endfor %}
+}

demo/tmpl/ex-edge-r/interfaces.tmpl

@@ -1,4 +0,0 @@
-interfaces {
-    {{ uplink }} {
-    }
-}

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

@@ -0,0 +1,3 @@
+protocols {
+    {{ protocol }};
+}

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

@@ -1,4 +0,0 @@
-protocols {
-    {{ protocol }} {
-    }
-}

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

@@ -1,5 +1,4 @@
 files:
   - system
-  - chassis
   - interfaces
   - protocols

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

@@ -1,4 +1,8 @@
 system {
     hostname {{ hostname }};
     location "{{ location }}";
+    zone {{ zone }};
+    users {
+      {{ username }};
+    }
 }

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

@@ -1 +0,0 @@
-../common/ex/system.tmpl

src/cli.rs

@@ -41,29 +41,21 @@ impl fmt::Display for EnvVars {
 /// loads `command line arguments` and `environment variables` using custom `clap`
 pub fn parse_args() -> Args {
     let matches: clap::ArgMatches = build().get_matches();
-
+    let raw_devices = matches.get_one::<String>("devices").unwrap();
-    let raw_devices = matches.get_one::<String>("devices").unwrap().to_string();
-    let devices: Regex =
-        Regex::new(&raw_devices).expect("Invalid regex pattern provided for `devices`");
-
-    let loglevel: LogLevel = match matches.get_flag("debug") {
-        true => LogLevel::Debug,
-        false => match matches.get_flag("verbose") {
-            true => LogLevel::Verbose,
-            false => LogLevel::Info,
-        },
-    };
-
-    let env: EnvVars = parse_env();
-
     Args {
-        devices,
+        devices: Regex::new(&raw_devices).expect("Invalid regex pattern provided for `devices`"),
-        loglevel,
+        loglevel: if matches.get_flag("debug") {
-        env,
+            LogLevel::Debug
+        } else if matches.get_flag("verbose") {
+            LogLevel::Verbose
+        } else {
+            LogLevel::Info
+        },
+        env: parse_env(),
     }
 }
 
-/// loads only environment variables
+/// loads environment variables
 pub fn parse_env() -> EnvVars {
     EnvVars {
         spec_path: match std::env::var("SF_SPEC_PATH") {
@@ -87,10 +79,10 @@ pub fn parse_env() -> EnvVars {
 
 const ABOUT_MSG: &str = r#"Skyforge Config Generation Engine"#;
 const ENV_MSG: &str = r#"Environment:
-    SF_SPEC_PATH    Path to the directory containing templates.        Defaults to "./spec".
+    SF_SPEC_PATH    Directory containing templates
-    SF_TMPL_PATH    Path to the directory containing specifications.   Defaults to "./tmpl".
+    SF_TMPL_PATH    Directory containing specifications
-    SF_OUT_PATH     Path to the directory for command output.          Defaults to "./out".
+    SF_OUT_PATH     Directory for command output
-    SF_LOG_PATH     Path to the directory for log output.              Defaults to "./log".
+    SF_LOG_PATH     Directory for log output
 "#;
 
 /// builds a custom command line argument parser

src/main.rs

@@ -4,57 +4,51 @@ mod specs;
 mod tmpls;
 
 use log::LogLevel;
-use serde_yml;
+use std::fs::{self, File, OpenOptions, create_dir_all, write};
-use std::fs::{self, create_dir_all, write, OpenOptions};
 use std::io::Write;
 use std::path::Path;
 use tmpls::RenderedConfig;
+use yaml_serde;
 
 fn main() {
     let args: cli::Args = cli::parse_args();
     let dbg: LogLevel = args.loglevel;
 
-    dbug!(dbg, "{}", &args);
+    dbug!(dbg, "{:#?}", &args);
 
     let specifications: Vec<specs::Specification> =
         specs::compile(&args.devices, &args.env.spec_path, dbg);
 
     for spec in specifications {
         let result = tmpls::process_templates(&spec, dbg).ok().unwrap();
-        output_rendered_configs(result, dbg)
+        output_rendered_configs(result, &args.env.out_path, dbg)
     }
 }
 
-fn output_rendered_configs(rendered_config: RenderedConfig, dbg: LogLevel) {
+fn output_rendered_configs(rendered_config: RenderedConfig, outdir: &str, dbg: LogLevel) {
     info!(dbg, "Writing Output");
-    let path: String = format!("out/{}", rendered_config.hostname);
+    let out_path = Path::new(outdir).join(rendered_config.hostname);
-    if Path::new(&path).exists() {
+    if out_path.exists() {
-        fs::remove_dir_all(&path).ok();
+        fs::remove_dir_all(&out_path).ok();
     }
-    create_dir_all(&path).ok();
+    create_dir_all(&out_path).ok();
-    let rendered_config_path = format!("{}/all.conf", path);
+
+    let merged_config_path = out_path.join("all.conf");
+    let mut all_file: File = OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open(&merged_config_path)
+        .expect("unable to open");
     for rendered_template in rendered_config.configs {
-        let outpath = format!("{}/{}.tmpl", path, rendered_template.0);
+        let template_path = out_path.join(rendered_template.0 + ".tera");
-        verb!(dbg, " | {}", &outpath);
+        verb!(dbg, " | {}", &template_path.display());
-        write(&outpath, &rendered_template.1).ok();
+        write(&template_path, &rendered_template.1).ok();
-        append_to_file(&rendered_config_path, rendered_template.1).ok();
+        all_file.write_all(&rendered_template.1.as_bytes()).ok();
     }
-    let outpath = format!("{}/compiled.spec", path);
-    let spec: String = match serde_yml::to_string(&rendered_config.spec) {
-        Ok(yaml) => yaml,
-        Err(e) => {
-            eprintln!("Failed to convert to YAML: {}", e);
-            String::new()
-        }
-    };
-    verb!(dbg, " | {}", &outpath);
-    write(&outpath, spec).ok();
-    info!(dbg, " | {} ", &rendered_config_path);
-}
 
-fn append_to_file(path: &str, content: String) -> std::io::Result<()> {
+    let spec: String = yaml_serde::to_string(&rendered_config.spec).unwrap();
-    let mut file = OpenOptions::new().create(true).append(true).open(path)?;
+    let compiled_spec_path = out_path.join("compiled-spec.yaml");
-
+    verb!(dbg, " | {}", &compiled_spec_path.display());
-    write!(file, "{}", content)?;
+    write(&compiled_spec_path, spec).ok();
-    Ok(())
+    info!(dbg, " | {} ", &merged_config_path.display());
 }

src/specs.rs

@@ -1,11 +1,11 @@
-use crate::{dbug, info, verb, LogLevel};
+use crate::{LogLevel, info, verb};
 use regex::Regex;
-use serde_json::{json, Map, Value};
+use serde_json::{Map, Value, json};
-use serde_yml;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::{env, fmt, fs};
 use walkdir::WalkDir;
+use yaml_serde;
 
 #[derive(Debug)]
 pub struct Specification {
@@ -19,37 +19,25 @@ pub struct Specification {
 
 impl Specification {
     pub fn build(
-        partitional: &str,
+        partitional: String,
-        regional: &str,
+        regional: String,
-        common: &str,
+        common: String,
-        zonal: &str,
+        zonal: String,
-        device: &str,
+        device: String,
     ) -> Result<Self, Box<dyn std::error::Error>> {
-        // Read all YAML files
+        let json_values: Vec<Value> = [&partitional, &regional, &common, &zonal, &device]
-        let yaml_contents: Vec<String> = [partitional, regional, common, zonal, device]
             .iter()
             .filter_map(|path| fs::read_to_string(path).ok())
-            .collect();
+            .map(|content| yaml_serde::from_str::<Value>(&content))
-
-        // Convert each YAML to JSON Value and collect them
-        let json_values: Vec<Value> = yaml_contents
-            .iter()
-            .map(|content| serde_yml::from_str(content))
             .collect::<Result<Vec<Value>, _>>()?;
 
         // Merge all objects under a single key
-        let mut merged_map = Map::new();
+        let merged_map: Map<String, Value> = json_values
-        for value in json_values {
+            .into_iter()
-            if let Some(obj) = value.as_object() {
+            .filter_map(|v| v.as_object().cloned())
-                for (_key, value) in obj {
+            .flat_map(|obj| obj.into_values().filter_map(|v| v.as_object().cloned()))
-                    if let Some(inner_obj) = value.as_object() {
+            .flatten()
-                        for (k, v) in inner_obj {
+            .collect();
-                            merged_map.insert(k.clone(), v.clone());
-                        }
-                    }
-                }
-            }
-        }
 
         // Create the final merged object
         let compiled = json!({"data": merged_map});
@@ -75,27 +63,13 @@ impl Specification {
             .filter(|c| !c.is_numeric())
             .collect::<String>()
     }
-
-    pub fn get_hostname(&self) -> String {
-        PathBuf::from(&self.device)
-            .file_name()
-            .unwrap()
-            .to_string_lossy()
-            .into_owned()
-    }
 }
 
 impl fmt::Display for Specification {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(
             f,
-            "Specification:\n\
+            "Specification:\nPartitional: {}\nRegional: {}\nCommon: {}\nZonal: {}\nDevice: {}\nCompiled:\n{}",
-             Partitional: {}\n\
-             Regional: {}\n\
-             Common: {}\n\
-             Zonal: {}\n\
-             Device: {}\n\
-             Compiled:\n{}",
             self.partitional, self.regional, self.common, self.zonal, self.device, self.compiled
         )
     }
@@ -119,20 +93,8 @@ pub fn compile(pattern: &Regex, spec_path: &String, dbg: LogLevel) -> Vec<Specif
         let regional: String = get_regional(&spec);
         let partitional: String = get_partional(&common, &regional);
         specifications.push(
-            match Specification::build(&partitional, &regional, &common, &zonal, &spec) {
+            match Specification::build(partitional, regional, common, zonal, spec) {
-                Ok(compiled_spec) => {
+                Ok(compiled_spec) => compiled_spec,
-                    dbug!(
-                        dbg,
-                        "Compiled Spec for '{}'\n | {}\n | {}\n | {}\n | {}\n | {}",
-                        compiled_spec.get_hostname(),
-                        compiled_spec.partitional,
-                        compiled_spec.regional,
-                        compiled_spec.common,
-                        compiled_spec.zonal,
-                        compiled_spec.device
-                    );
-                    compiled_spec
-                }
                 Err(e) => panic!("failed to build Specification: {}", e),
             },
         )

src/tmpls.rs

@@ -1,9 +1,9 @@
 use crate::specs::Specification;
-use crate::{info, verb, LogLevel};
+use crate::{LogLevel, info, verb};
 use serde_json::Value;
-use serde_yml;
 use std::fs;
 use tera::{Context, Tera};
+use yaml_serde;
 
 #[derive(serde::Deserialize)]
 struct TemplateConfig {
@@ -40,8 +40,17 @@ pub fn process_templates(
 
     // Read structure.yaml
     let structure_path = format!("{}/structure.yaml", base_dir);
-    let structure_content = fs::read_to_string(&structure_path)?;
+    let structure_content: String = match fs::read_to_string(&structure_path) {
-    let config: TemplateConfig = serde_yml::from_str(&structure_content)?;
+        Ok(content) => content,
+        Err(e) => {
+            eprintln!(
+                "while attempting to read {}: {}, skipping",
+                &structure_path, e
+            );
+            String::new()
+        }
+    };
+    let config: TemplateConfig = yaml_serde::from_str(&structure_content)?;
 
     // Initialize Tera with the specific directory
     let mut tera = Tera::default();
@@ -51,15 +60,35 @@ pub fn process_templates(
     let mut configs = Vec::new();
     for template_name in config.files {
         // Read the template file directly
-        let template_path = format!("{}/{}.tmpl", base_dir, template_name);
+        let template_path = format!("{}/{}.tera", base_dir, template_name);
         verb!(dbg, " | {}", &template_path);
-        let template_content = fs::read_to_string(&template_path)?;
+        let template_content = match fs::read_to_string(&template_path) {
+            Ok(content) => content,
+            Err(e) => {
+                eprintln!(
+                    "while attempting to read {}: {}, skipping",
+                    &template_path, e
+                );
+                String::new()
+            }
+        };
 
         // Add this specific template to Tera
         tera.add_raw_template(&template_name, &template_content)?;
 
         // Render the template
-        let rendered = tera.render(&template_name, &context)?;
+        let rendered = tera
+            .render(&template_name, &context)
+            .inspect_err(|e| {
+                let mut chain = format!("{}", e);
+                let mut next_source = std::error::Error::source(e);
+                while let Some(source) = next_source {
+                    chain.push_str(&format!(" -> {}", source));
+                    next_source = source.source();
+                }
+                eprintln!("[tera] {}", chain);
+            })
+            .unwrap_or_default();
         configs.push((String::from(&template_name), rendered));
     }