feat: cache prompted values to avoid duplicate prompts

When generating .env files, if the same environment variable key appears
in multiple .env.example files, the user was prompted for each occurrence.

Now, values entered by the user (or auto-generated) are cached and reused
for subsequent occurrences of the same key. This provides a much better UX
when working with monorepos that have many packages sharing common env vars.

Bumps version to 2.0.7.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: RedEagle-dh

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "zenv"
-version = "2.0.6"
+version = "2.0.7"
 edition = "2021"
 authors = ["Dave"]
 description = "Environment variable validation and generation for TypeScript/Node.js projects with Zod schemas"

Cargo.toml

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv-darwin-arm64",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "zenv binary for macOS ARM64 (Apple Silicon)",
 	"license": "MIT",
 	"repository": {

npm/darwin-arm64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv-darwin-x64",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "zenv binary for macOS x64 (Intel)",
 	"license": "MIT",
 	"repository": {

npm/darwin-x64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv-linux-arm64",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "zenv binary for Linux ARM64",
 	"license": "MIT",
 	"repository": {

npm/linux-arm64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv-linux-x64",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "zenv binary for Linux x64",
 	"license": "MIT",
 	"repository": {

npm/linux-x64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv-win32-x64",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "zenv binary for Windows x64",
 	"license": "MIT",
 	"repository": {

npm/win32-x64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@modlogtv/zenv",
-	"version": "2.0.6",
+	"version": "2.0.7",
 	"description": "Zod-powered environment variable validation and generation for TypeScript/Node.js projects.",
 	"keywords": [
 		"env",
@@ -29,11 +29,11 @@
 		"bin.js"
 	],
 	"optionalDependencies": {
-		"@modlogtv/zenv-darwin-arm64": "2.0.6",
-		"@modlogtv/zenv-darwin-x64": "2.0.6",
-		"@modlogtv/zenv-linux-arm64": "2.0.6",
-		"@modlogtv/zenv-linux-x64": "2.0.6",
-		"@modlogtv/zenv-win32-x64": "2.0.6"
+		"@modlogtv/zenv-darwin-arm64": "2.0.7",
+		"@modlogtv/zenv-darwin-x64": "2.0.7",
+		"@modlogtv/zenv-linux-arm64": "2.0.7",
+		"@modlogtv/zenv-linux-x64": "2.0.7",
+		"@modlogtv/zenv-win32-x64": "2.0.7"
 	},
 	"engines": {
 		"node": ">=16"

npm/zenv/package.json

@@ -43,6 +43,8 @@ pub struct Generator {
     dry_run: bool,
     force: bool,
     non_interactive: bool,
+    /// Cache for prompted values - avoids asking for the same key multiple times
+    prompted_values: HashMap<String, String>,
 }
 
 impl Generator {
@@ -59,11 +61,12 @@ impl Generator {
             dry_run,
             force,
             non_interactive,
+            prompted_values: HashMap::new(),
         }
     }
 
     /// Run the generator
-    pub fn run(&self) -> Result<GenerationReport, AppError> {
+    pub fn run(&mut self) -> Result<GenerationReport, AppError> {
         let mut report = GenerationReport::new();
 
         // Find all .env.example files
@@ -144,7 +147,7 @@ impl Generator {
 
     /// Process a single .env.example file
     fn process_env_example(
-        &self,
+        &mut self,
         file: &EnvExampleFile,
         report: &mut GenerationReport,
     ) -> Result<(), AppError> {
@@ -224,10 +227,15 @@ impl Generator {
 
     /// Get value for a variable based on its metadata
     fn get_var_value(
-        &self,
+        &mut self,
         var: &EnvVarDefinition,
         report: &mut GenerationReport,
     ) -> Result<Option<String>, AppError> {
+        // Check if we already have a cached value for this key
+        if let Some(cached) = self.prompted_values.get(&var.name) {
+            return Ok(Some(cached.clone()));
+        }
+
         match &var.value_source {
             ValueSource::Prompt { description } => {
                 if self.non_interactive {
@@ -255,12 +263,16 @@ impl Generator {
 
                 let value = prompts::prompt_input(&prompt_text, var.default_value.as_deref())?;
                 report.vars_prompted.push(var.name.clone());
+                // Cache the prompted value for reuse
+                self.prompted_values.insert(var.name.clone(), value.clone());
                 Ok(Some(value))
             }
 
             ValueSource::Generate { length } => {
                 let value = secrets::generate_secret(*length);
                 report.vars_generated.push(var.name.clone());
+                // Cache the generated value for reuse
+                self.prompted_values.insert(var.name.clone(), value.clone());
                 Ok(Some(value))
             }
 
@@ -278,6 +290,8 @@ impl Generator {
                         None,
                     )?;
                     report.vars_prompted.push(var.name.clone());
+                    // Cache the prompted value for reuse
+                    self.prompted_values.insert(var.name.clone(), value.clone());
                     Ok(Some(value))
                 } else {
                     Ok(None)

src/generator/mod.rs

@@ -110,7 +110,7 @@ fn run_generate(
 ) -> Result<bool, AppError> {
     let target_dir = args.directory.clone().unwrap_or_else(|| root_dir.clone());
 
-    let generator = generator::Generator::new(
+    let mut generator = generator::Generator::new(
         target_dir,
         config,
         args.dry_run,