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Add --context parameter for per-invocation template customization #170

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Merged
svix-jplatte merged 1 commit into from
May 28, 2026
Merged

Add --context parameter for per-invocation template customization #170

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15 changes: 13 additions & 2 deletions src/cli_v1.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,10 @@ enum Command {
#[arg(short, long)]
output_dir: Option<Utf8PathBuf>,

/// Optional JSON object available in templates as `context`.
#[arg(long)]
context: Option<String>,

/// Disable automatic postprocessing of the output (formatting and automatic style fixes).
#[arg(long)]
no_postprocess: bool,
Expand Down Expand Up @@ -136,12 +140,18 @@ pub fn run_cli_v1_main() -> anyhow::Result<()> {
Command::Generate {
template,
output_dir,
context,
no_postprocess,
..
} => {
let context: Option<minijinja::Value> = context
.map(|s| serde_json::from_str(&s).context("invalid 'context' argument"))
.transpose()?;

let generated_paths = match &output_dir {
Some(path) => {
let generated_paths = generate(&api, template.into(), path, no_postprocess)?;
let generated_paths =
generate(&api, template.into(), path, context, no_postprocess)?;
println!("done! output written to {path}");
generated_paths
}
Expand All @@ -167,7 +177,8 @@ pub fn run_cli_v1_main() -> anyhow::Result<()> {
.try_into()
.context("non-UTF8 tempdir path")?;

let generated_paths = generate(&api, template.into(), path, no_postprocess)?;
let generated_paths =
generate(&api, template.into(), path, context, no_postprocess)?;
println!("done! output written to {path}");

// Persist the TempDir if everything was successful
Expand Down
2 changes: 2 additions & 0 deletions src/generator.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ pub fn generate(
api: &Api,
tpl_name: String,
output_dir: &Utf8Path,
context: Option<minijinja::Value>,
no_postprocess: bool,
) -> anyhow::Result<Vec<Utf8PathBuf>> {
let (name_without_jinja_suffix, tpl_path) = match tpl_name.strip_suffix(".jinja") {
Expand Down Expand Up @@ -58,6 +59,7 @@ pub fn generate(
.parent()
.with_context(|| format!("invalid template path `{tpl_path}`"))?,
)?;
minijinja_env.add_global("context", context);
minijinja_env.add_template(tpl_path, &tpl_source)?;
let tpl = minijinja_env.get_template(tpl_path)?;

Expand Down
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