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New Templates & Changes in CLI #790

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aa0b7d3
new temaplates & minor changes in cli logic
nikbhintade Oct 22, 2025
6efc6c9
3 new templates
nikbhintade Oct 22, 2025
a03fee0
updated config, file names & template enum
nikbhintade Oct 23, 2025
77eccbb
Remove Language Prompt
nikbhintade Oct 29, 2025
629695a
removed ReScript & JavaScript refs & fixed test
nikbhintade Oct 29, 2025
eb8eb09
remove supported_language function & fuel greeter config fix
nikbhintade Oct 29, 2025
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4 changes: 2 additions & 2 deletions codegenerator/cli/CommandLineHelp.md
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,7 @@ Initialize an indexer with one of the initialization options
* `-n`, `--name <NAME>` — The name of your project
* `-l`, `--language <LANGUAGE>` — The language used to write handlers

Possible values: `javascript`, `typescript`, `rescript`
Possible values: `typescript`

@DZakh DZakh Nov 3, 2025

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It would be nice to keep ReScript option for contract import. No need to have a promt for it, only as a cli.


* `--api-token <API_TOKEN>` — The hypersync API key to be initialized in your templates .env file

Expand Down Expand Up @@ -142,7 +142,7 @@ Initialize Evm indexer from an example template

* `-t`, `--template <TEMPLATE>` — Name of the template to be used in initialization

Possible values: `greeter`, `erc20`
Possible values: `greeter`, `erc20`, `topic-filtering`, `wildcard-indexing`, `on-block-handler`, `effects-api`, `factory-indexer`, `multichain-indexer`



Expand Down
20 changes: 14 additions & 6 deletions codegenerator/cli/src/cli_args/init_config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,22 @@ pub mod evm {

#[derive(Clone, Debug, ValueEnum, Serialize, Deserialize, EnumIter, EnumString, Display)]
pub enum Template {
#[strum(serialize = "Greeter")]
Greeter,
#[strum(serialize = "ERC20")]
Erc20,
#[strum(serialize = "Feature: Topic Filtering")]
TopicFiltering,
#[strum(serialize = "Feature: Wildcard Indexing")]
WildcardIndexing,
#[strum(serialize = "Feature: onBlock Handler")]
OnBlockHandler,
Comment on lines +31 to +40

@coderabbitai coderabbitai Bot Oct 22, 2025

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⚠️ Potential issue | 🔴 Critical

🧩 Analysis chain

Template naming/serialization may drift across clap/strum/serde. Verify UX strings and parsing.

  • strum(serialize = "...") sets Display/EnumString, but clap::ValueEnum uses its own naming rules unless given explicit clap attributes; serde derives won’t use strum Display either.
  • Result: interactive/help text and config (de)serialization may show different strings than the ones you intend (“Feature: ...”).

Please confirm:

  • CLI shows the intended labels for these variants.
  • Non-interactive flags parse both human labels and machine labels as expected.
  • The new templates (effects-api, factory-indexer, multichain-indexer) are exposed to users (either here or via template_dirs). If they’re intentionally not in this enum, ensure template_dirs.rs maps them correctly.

You can run:

🏁 Script executed:

#!/bin/bash
# Inspect enum variants and any template mappings
rg -nP 'enum\s+Template\b' -C2 codegenerator/cli
rg -nP 'supported_languages\s*\(' codegenerator/cli
rg -nP '(effects_api_template|factory_indexer_template|multichain_indexer_template)' -n codegenerator/cli

Length of output: 1647

I need to gather more information about the Template enums and how they're used.<!-- [scratchpad_update]
[observations_additional]

  • Web search confirms: clap::ValueEnum has its own naming logic separate from strum serialize
  • clap uses kebab-case by default; can be overridden with #[clap(rename_all = "...")] attribute
  • strum(serialize = "...") controls Display/EnumString/serde serialization, NOT clap's ValueEnum parsing
  • When clap::ValueEnum and strum both present, clap won't automatically respect strum(serialize) unless #[clap(...)] attributes are explicitly added
  • This is exactly what the review comment warns about
  • ValueEnum.to_possible_value() is the method that controls CLI value parsing

[pending_critical]

  • Need to inspect the actual Template enum definition to see if clap attributes are present
  • Need to find where the new templates are defined/used
  • Need to check template_dirs.rs for template registration
    [scratchpad_end] -->

Need to inspect the actual Template enum and template registration in more detail.

🏁 Script executed:

#!/bin/bash
# Get full context of the Template enum at line 30
sed -n '28,80p' codegenerator/cli/src/cli_args/init_config.rs

Length of output: 2220

🏁 Script executed:

#!/bin/bash
# Get full context of the second Template enum at line 231
sed -n '229,240p' codegenerator/cli/src/cli_args/init_config.rs

Length of output: 285

🏁 Script executed:

#!/bin/bash
# Look for clap attributes on Template enum
rg -nP '#\[clap' codegenerator/cli/src/cli_args/init_config.rs -A2 -B2

Length of output: 243

🏁 Script executed:

#!/bin/bash
# Search for new template names in template_dirs.rs
rg -nP '(effects|factory|multichain)' codegenerator/cli/src/template_dirs.rs -i -C2

Length of output: 0

🏁 Script executed:

#!/bin/bash
# Check if there's a match on Template enum and ValueEnum derive to understand how it's used
ast-grep --pattern $'#[derive($$$ValueEnum$$$)]
pub enum Template {
  $$$
}'

Length of output: 0

🏁 Script executed:

#!/bin/bash
# Look for clap rename_all on the enum itself
rg -nP 'enum Template' codegenerator/cli -B5 | head -40

Length of output: 1303

🏁 Script executed:

#!/bin/bash
# Search in template_dirs for TemplateProvider or template registration logic
rg -nP 'fn.*template' codegenerator/cli/src/template_dirs.rs -i -n

Length of output: 1251

🏁 Script executed:

#!/bin/bash
# Look for where Template enum variants are used in value parsing
rg -nP 'to_possible_value|value_variants|Template::' codegenerator/cli/src/cli_args/init_config.rs -n

Length of output: 0

🏁 Script executed:

#!/bin/bash
# Check if there's any test or mock for template selection
fd -e rs codegenerator/cli -path '*/test*' -o -name '*test*' | xargs rg -l Template 2>/dev/null | head -5

Length of output: 360

🏁 Script executed:

#!/bin/bash
# Look for explicit use of strum in imports or dependencies
rg -n '^use.*strum' codegenerator/cli/src/

Length of output: 991

🏁 Script executed:

#!/bin/bash
# Look for where Template is actually parsed/matched in the interactive flow
rg -nP 'Template::|template.*select|select.*template' codegenerator/cli/src/cli_args/interactive_init/ -i

Length of output: 932

🏁 Script executed:

#!/bin/bash
# Check Cargo.toml for versions of clap, strum, serde
rg -n '(clap|strum|serde)' codegenerator/cli/Cargo.toml -A1

Length of output: 379

🏁 Script executed:

#!/bin/bash
# Look at the full enum definition including derive macros
sed -n '25,100p' codegenerator/cli/src/cli_args/init_config.rs

Length of output: 3034

I need to verify a few more critical details about how Template enum is used in argument parsing and whether clap attributes exist at the module level.

🏁 Script executed:

#!/bin/bash
# Check if Template is used in clap argument definitions
rg -nP 'template|Template' codegenerator/cli/src/cli_args/clap_definitions.rs -i -C3

Length of output: 1763

🏁 Script executed:

#!/bin/bash
# Look at the evm module declaration to see if there are clap attributes
sed -n '1,50p' codegenerator/cli/src/cli_args/init_config.rs

Length of output: 1537

🏁 Script executed:

#!/bin/bash
# Check how the Template is rendered in the interactive prompt (Display impl check)
rg -nP 'shared_prompts|SelectItem' codegenerator/cli/src/cli_args/interactive_init/shared_prompts.rs -C5

Length of output: 887

🏁 Script executed:

#!/bin/bash
# Look for where template names are actually output to user (help text, prompts)
rg -nP 'which.*template|select.*template' codegenerator/cli/src/cli_args/interactive_init/ -i -C3

Length of output: 1539

🏁 Script executed:

#!/bin/bash
# Check TemplateType enum to understand template registration
sed -n '179,220p' codegenerator/cli/src/template_dirs.rs

Length of output: 1422

🏁 Script executed:

#!/bin/bash
# Look for any rename_all or clap rename directives on evm module
grep -n 'mod evm' codegenerator/cli/src/cli_args/init_config.rs -B5 -A10

Length of output: 411

🏁 Script executed:

#!/bin/bash
# Search for ValueEnum implementation to see if to_possible_value is customized
rg -nP 'impl.*ValueEnum|to_possible_value' codegenerator/cli/src/cli_args/init_config.rs -n

Length of output: 0

🏁 Script executed:

#!/bin/bash
# Check template_dirs.rs TemplateType for variant names
sed -n '179,200p' codegenerator/cli/src/template_dirs.rs

Length of output: 679

Add #[clap(...)] attributes to Template enum variants to align clap parsing with strum Display strings.

The review concern is valid. Template enum (line 29-40) derives ValueEnum without explicit clap attributes, causing a mismatch:

  • Interactive UI displays strum serialized strings: "ERC20", "Feature: Topic Filtering"
  • clap parses using variant names as kebab-case: "erc-20", "topic-filtering"

This breaks non-interactive flag parsing (e.g., --template erc-20 would fail).

Fix: Add #[clap(name = "...")] attributes on each Template variant, mirroring the strum serialized values. Reference: Language enum (lines 346-352) demonstrates the correct pattern with explicit clap name attributes.

Regarding new templates: effects_api_template, factory_indexer_template, multichain_indexer_template are not found in the Template enum or template_dirs.rs. Verify whether these should be added to the enum or are intentionally excluded.

🤖 Prompt for AI Agents 
In codegenerator/cli/src/cli_args/init_config.rs around lines 31 to 40, the
Template enum variants derive ValueEnum but lack clap name attributes so clap
parsing uses kebab-case variant names (e.g., "erc-20") while the interactive UI
uses strum serialized strings (e.g., "ERC20"); add #[clap(name = "...")] to each
variant with the exact string used in #[strum(serialize = "...")] (e.g.,
#[clap(name = "ERC20")]) so non-interactive flags parse the same values, and
also verify whether effects_api_template, factory_indexer_template, and
multichain_indexer_template should be added to this enum or intentionally
omitted and update template_dirs.rs accordingly.

#[strum(serialize = "Feature: Effects API")]
EffectsAPI,
#[strum(serialize = "Feature: Factory Indexer")]
FactoryIndexer,
#[strum(serialize = "Feature: Multichain Indexer")]
MultichainIndexer,
Comment on lines +35 to +46

@DZakh DZakh Oct 23, 2025

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Suggested change
#[strum(serialize = "Feature: Topic Filtering")]
TopicFiltering,
#[strum(serialize = "Feature: Wildcard Indexing")]
WildcardIndexing,
#[strum(serialize = "Feature: onBlock Handler")]
OnBlockHandler,
#[strum(serialize = "Feature: Effects API")]
EffectsAPI,
#[strum(serialize = "Feature: Factory Indexer")]
FactoryIndexer,
#[strum(serialize = "Feature: Multichain Indexer")]
MultichainIndexer,
#[strum(serialize = "Feature: Topic Filtering")]
TopicFiltering,
#[strum(serialize = "Feature: Wildcard Indexing")]
WildcardIndexing,
#[strum(serialize = "Feature: Block Handler")]
OnBlockHandler,
#[strum(serialize = "Feature: External Calls")]
EffectsAPI,
#[strum(serialize = "Feature: Factory Contract")]
FactoryIndexer,
#[strum(serialize = "Feature: Multichain Indexer")]
MultichainIndexer,

}

///A an object that holds all the values a user can select during
Expand Down Expand Up @@ -335,21 +349,15 @@ impl Ecosystem {
)]
///Which language do you want to write in?
pub enum Language {
#[clap(name = "javascript")]
JavaScript,
#[clap(name = "typescript")]
TypeScript,
#[clap(name = "rescript")]
ReScript,
}

impl Language {
// Logic to get the event handler directory based on the language
pub fn get_event_handler_directory(&self) -> String {
match self {
Language::ReScript => "./src/EventHandlers.res.js".to_string(),
Language::TypeScript => "src/EventHandlers.ts".to_string(),
Language::JavaScript => "./src/EventHandlers.js".to_string(),
}
}
}
Expand Down
22 changes: 4 additions & 18 deletions codegenerator/cli/src/cli_args/interactive_init/mod.rs
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Expand Up @@ -16,7 +16,6 @@ use crate::{
use anyhow::{Context, Result};
use inquire::{Select, Text};
use shared_prompts::prompt_template;
use std::str::FromStr;
use strum;
use strum::{Display, EnumIter, IntoEnumIterator};
use validation::{
Expand All @@ -30,7 +29,9 @@ enum EcosystemOption {
Fuel,
}

async fn prompt_ecosystem(cli_init_flow: Option<InitFlow>) -> Result<Ecosystem> {
async fn prompt_ecosystem(
cli_init_flow: Option<InitFlow>,
) -> Result<Ecosystem> {
let init_flow = match cli_init_flow {
Some(v) => v,
None => {
Expand Down Expand Up @@ -138,22 +139,7 @@ pub async fn prompt_missing_init_args(
}
};

let language = match init_args.language {
Some(args_language) => args_language,
None => {
let options = Language::iter()
.map(|language| language.to_string())
.collect::<Vec<String>>();

let input_language = Select::new("Which language would you like to use?", options)
.with_starting_cursor(1)
.prompt()
.context("prompting user to select language")?;

Language::from_str(&input_language)
.context("parsing user input for language selection")?
}
};
let language = Language::TypeScript;

@DZakh DZakh Nov 3, 2025

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I'd do it this way. Also need to perform this check only for contract import flow. Since templates are TS only.

Suggested change
let language = Language::TypeScript;
let language = match init_args.language {
Some(args_language) => args_language,
None => Language::TypeScript
};


let ecosystem = prompt_ecosystem(init_args.init_commands)
.await
Expand Down
16 changes: 4 additions & 12 deletions codegenerator/cli/src/config_parsing/graph_migration/mod.rs
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Expand Up @@ -114,9 +114,7 @@ pub struct BlockHandler {
// Logic to get the event handler directory based on the language
fn get_event_handler_directory(language: &Language) -> String {
match language {
Language::ReScript => "./src/EventHandlers.res.js".to_string(),
Language::TypeScript => "src/EventHandlers.ts".to_string(),
Language::JavaScript => "./src/EventHandlers.js".to_string(),
}
}

Expand Down Expand Up @@ -462,7 +460,7 @@ mod test {
let temp_dir = TempDir::new("temp_graph_migration_folder").unwrap();
// subgraph ID of USDC on Ethereum mainnet
let cid: &str = "QmU5V3jy56KnFbxX2uZagvMwocYZASzy1inX828W2XWtTd";
let language: Language = Language::ReScript;
let language: Language = Language::TypeScript;
let project_root = PathBuf::from(temp_dir.path());
super::generate_config_from_subgraph_id(&project_root, cid, &language)
.await
Expand Down Expand Up @@ -552,15 +550,9 @@ mod test {
// Unit test to check that the correct event handler directory is returned based on the language
#[test]
fn test_get_event_handler_directory() {
let language_1: Language = Language::ReScript;
let language_2: Language = Language::JavaScript;
let language_3: Language = Language::TypeScript;
let event_handler_directory_1 = super::get_event_handler_directory(&language_1);
let event_handler_directory_2 = super::get_event_handler_directory(&language_2);
let event_handler_directory_3 = super::get_event_handler_directory(&language_3);
assert_eq!(event_handler_directory_1, "./src/EventHandlers.res.js");
assert_eq!(event_handler_directory_2, "./src/EventHandlers.js");
assert_eq!(event_handler_directory_3, "src/EventHandlers.ts");
let language: Language = Language::TypeScript;
let event_handler_directory = super::get_event_handler_directory(&language);
assert_eq!(event_handler_directory, "src/EventHandlers.ts");
}
// Unit test to check that the correct network contract hashmap is generated
#[tokio::test]
Expand Down
11 changes: 2 additions & 9 deletions codegenerator/cli/src/executor/init.rs
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
use crate::{
cli_args::{
clap_definitions::{InitArgs, ProjectPaths},
init_config::{self, Ecosystem, Language},
init_config::{self, Ecosystem},
interactive_init::prompt_missing_init_args,
},
commands,
Expand All @@ -19,7 +19,7 @@ use crate::{
template_dirs::TemplateDirs,
utils::file_system,
};
use anyhow::{anyhow, Context, Result};
use anyhow::{Context, Result};

use std::path::PathBuf;

Expand Down Expand Up @@ -258,13 +258,6 @@ pub async fn run_init_args(init_args: InitArgs, project_paths: &ProjectPaths) ->

commands::codegen::run_codegen(&config).await?;

if init_config.language == Language::ReScript {
let res_build_exit = commands::rescript::build(&parsed_project_paths.project_root).await?;
if !res_build_exit.success() {
return Err(anyhow!("Failed to build rescript"))?;
}
}

// If the project directory is not the current directory, print a message for user to cd into it
if parsed_project_paths.project_root != PathBuf::from(".") {
println!(
Expand Down
11 changes: 1 addition & 10 deletions codegenerator/cli/src/hbs_templating/contract_import_templates.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -253,8 +253,7 @@ impl Event {
/// Returns the code to get the entity id from an event
pub fn get_entity_id_code(is_fuel: bool, language: &Language) -> String {
let int_as_string = |int_var_name| match language {
Language::ReScript => format!("{int_var_name}->Belt.Int.toString"),
Language::TypeScript | Language::JavaScript => int_var_name,
Language::TypeScript => int_var_name,
Comment on lines 255 to +256

@DZakh DZakh Nov 3, 2025

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Let's keep ReScript here

};
let int_event_prop_as_string =
|event_prop: &str| int_as_string(format!("event.{event_prop}"));
Expand All @@ -281,9 +280,7 @@ impl Event {
match is_fuel {
true => {
let data_code = match language {
Language::ReScript => "%raw(`{}`)",
Language::TypeScript => "{}",
Language::JavaScript => "{}",
};
format!(
"{event_module}.mock({{data: {data_code} /* It mocks event fields with \
Expand Down Expand Up @@ -566,12 +563,6 @@ mod test {
#[test]
fn test_get_entity_id_code() {
const IS_FUEL: bool = true;
assert_eq!(
Event::get_entity_id_code(!IS_FUEL, &Language::ReScript),
"`${event.chainId->Belt.Int.toString}_${event.block.number->Belt.Int.\
toString}_${event.logIndex->Belt.Int.toString}`"
.to_string()
);

assert_eq!(
Event::get_entity_id_code(IS_FUEL, &Language::TypeScript),
Expand Down
10 changes: 2 additions & 8 deletions codegenerator/cli/src/hbs_templating/init_templates.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,7 @@ use std::path::PathBuf;
#[derive(Serialize, Debug, PartialEq)]
pub struct InitTemplates {
project_name: String,
is_rescript: bool,
is_typescript: bool,
is_javascript: bool,
envio_version: String,
//Used for the package.json reference to generated in handlers
relative_path_from_root_to_generated: String,
Expand Down Expand Up @@ -46,9 +44,7 @@ impl InitTemplates {
.context("Failed to diff generated from root path")?;
let template = InitTemplates {
project_name,
is_rescript: lang == &Language::ReScript,
is_typescript: lang == &Language::TypeScript,
is_javascript: lang == &Language::JavaScript,
envio_version,
relative_path_from_root_to_generated,
envio_api_token,
Expand All @@ -67,7 +63,7 @@ mod test {
fn test_new_init_template() {
let init_temp = InitTemplates::new(
"my-project".to_string(),
&Language::ReScript,
&Language::TypeScript,
&ParsedProjectPaths::default(),
"latest".to_string(),
None,
Expand All @@ -76,9 +72,7 @@ mod test {

let expected = InitTemplates {
project_name: "my-project".to_string(),
is_rescript: true,
is_typescript: false,
is_javascript: false,
is_typescript: true,
envio_version: "latest".to_string(),
relative_path_from_root_to_generated: "./generated".to_string(),
envio_api_token: None,
Expand Down
82 changes: 59 additions & 23 deletions codegenerator/cli/src/template_dirs.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,13 +10,20 @@ use std::{

pub trait Template: Display {
fn to_dir_name(&self) -> String;

}

impl Template for evm::Template {
fn to_dir_name(&self) -> String {
match self {
evm::Template::Greeter => "greeter",
evm::Template::Erc20 => "erc20",
evm::Template::TopicFiltering => "topic_filtering",
evm::Template::WildcardIndexing => "wildcard_indexing",
evm::Template::OnBlockHandler => "onblock_handler",
evm::Template::EffectsAPI => "effects_api",
evm::Template::FactoryIndexer => "factory_indexer",
evm::Template::MultichainIndexer => "multichain_indexer",
}
.to_string()
}
Expand Down Expand Up @@ -431,59 +438,88 @@ mod test {
#[test]
fn all_init_templates_exist() {
let template_dirs = TemplateDirs::new();
let lang = &Language::TypeScript;

// EVM templates
for template in evm::Template::iter() {
for lang in Language::iter() {
template_dirs
.get_template_lang_dir(&template, &lang)
.expect("static lang");
}
.expect(&format!(
"Expected static language dir for EVM template {:?} and language {:?}",
template, &lang
));


template_dirs
.get_template_shared_dir(&template)
.expect("static templte shared");
.expect(&format!(
"Expected shared static dir for EVM template {:?}",
template
));
}

// FUEL templates
for template in fuel::Template::iter() {
for lang in Language::iter() {
template_dirs
.get_template_lang_dir(&template, &lang)
.expect("static lang");
}
.expect(&format!(
"Expected static language dir for FUEL template {:?} and language {:?}",
template, &lang
));

template_dirs
.get_template_shared_dir(&template)
.expect("static templte shared");
.expect(&format!(
"Expected shared static dir for FUEL template {:?}",
template
));
}

// Shared dynamic init template
template_dirs
.get_init_template_dynamic_shared()
.expect("dynami shared init template");
.expect("Expected dynamic shared init template dir to exist");
}

#[test]
fn all_init_templates_extract_succesfully() {
let template_dirs = TemplateDirs::new();
let temp_dir =
TempDir::new("init_extract_lang_test").expect("Failed creating tempdir init template");
let temp_dir = TempDir::new("init_extract_lang_test")
.expect("Failed creating tempdir for init template");
let lang = &Language::TypeScript;

// EVM templates
for template in evm::Template::iter() {
for lang in Language::iter() {
template_dirs
.get_and_extract_template(&template, &lang, &(PathBuf::from(temp_dir.path())))
.expect("static lang");
}
.get_and_extract_template(&template, &lang, &PathBuf::from(temp_dir.path()))
.expect(&format!(
"Failed extracting EVM template {:?} for language {:?}",
template, &lang
));

}

// FUEL templates
for template in fuel::Template::iter() {
for lang in Language::iter() {
template_dirs
.get_and_extract_template(&template, &lang, &(PathBuf::from(temp_dir.path())))
.expect("static lang");
}
.get_and_extract_template(&template, &lang, &PathBuf::from(temp_dir.path()))
.expect(&format!(
"Failed extracting FUEL template {:?} for language {:?}",
template, &lang
));
}
let temp_dir =
TempDir::new("init_extract_blank_lang_test").expect("Failed creating tempdir blank");

// Blank template extraction
let blank_temp_dir = TempDir::new("init_extract_blank_lang_test")
.expect("Failed creating tempdir for blank template");

for lang in Language::iter() {
template_dirs
.get_and_extract_blank_template(&lang, &temp_dir.path().into())
.expect("static blank");
.get_and_extract_blank_template(&lang, &PathBuf::from(blank_temp_dir.path()))
.expect(&format!(
"Failed extracting blank template for language {:?}",
lang
));
}
}

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