generate index files with given filename, disable by default

README.md

@@ -20,7 +20,7 @@ cargo install pulsarss
 ## Launch
 
 ``` bash
-pulsarss --source https://path/to/feed.rss
+pulsarss --source https://path/to/feed.rss --index index.gmi
 ```
 
 ### Options
@@ -28,7 +28,7 @@ pulsarss --source https://path/to/feed.rss
 * `source`, `s` - RSS feed source (required)
 * `target`, `t` - Destination directory (`public` by default)
 * `update`, `u` - Update timeout in seconds (`60` by default)
-* `index`, `i` - Generate index files (`index.gmi` by default, empty to disable)
+* `index`, `i` - Generate index files with given filename (disabled by default)
 * `limit`, `l` - Limit channel items (unlimited by default)
 * `output`, `o` - Print output (`dw` by default):
   * `d` - debug
@@ -49,7 +49,7 @@ After=network.target
 Type=simple
 User=pulsarss
 Group=pulsarss
-ExecStart=pulsarss -s https://path/to/feed.rss
+ExecStart=pulsarss -s https://path/to/feed.rss -i index.gmi
 
 [Install]
 WantedBy=multi-user.target

src/argument.rs

@@ -3,9 +3,9 @@ use clap::Parser;
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 pub struct Argument {
-    /// Generate index files (`index.gmi` by default, empty to disable)
-    #[arg(short, long, default_value_t = String::from("index.gmi"))]
-    pub index: String,
+    /// Generate index files with given filename (disabled by default)
+    #[arg(short, long)]
+    pub index: Option<String>,
 
     /// Limit channel items (unlimited by default)
     #[arg(short, long, default_value_t = 0)]

src/main.rs

@@ -94,36 +94,38 @@ fn crawl(argument: &Argument, output: &Output) -> Result<(), Box<dyn Error>> {
 
         File::create(destination.item())?.write_all(data.join("\n\n").as_bytes())?;
 
-        if !argument.index.is_empty() {
-            index.insert(destination.path); // request index file update
+        if !argument.index.is_none() {
+            index.insert(destination.path); // request index file update in this location
         }
     }
 
     // renew pending index files on items crawl completed
-    for path in index {
-        let subject = format!("{path}{}", argument.index);
+    if let Some(ref index_argument) = argument.index {
+        for path in index {
+            let subject = format!("{path}{index_argument}");
 
-        let mut index = File::create(&subject)?;
-        let mut data = Vec::with_capacity(argument.limit);
+            let mut index = File::create(&subject)?;
+            let mut data = Vec::with_capacity(argument.limit);
 
-        let mut total = 0;
-        for file in read_dir(&path)? {
-            let name = file?.file_name().into_string().unwrap();
+            let mut total = 0;
+            for file in read_dir(&path)? {
+                let name = file?.file_name().into_string().unwrap();
 
-            if name == argument.index {
-                continue;
+                if &name == index_argument {
+                    continue;
+                }
+
+                let mut buffer = String::from("##"); // correct heading levels
+                File::open(format!("{path}{name}"))?.read_to_string(&mut buffer)?;
+                data.push(buffer);
+
+                total += 1;
             }
 
-            let mut buffer = String::from("##"); // correct heading levels
-            File::open(format!("{path}{name}"))?.read_to_string(&mut buffer)?;
-            data.push(buffer);
+            index.write_all(data.join("\n\n").as_bytes())?;
 
-            total += 1;
+            output.debug(&format!("renew `{subject}` (total: {total})"));
         }
-
-        index.write_all(data.join("\n\n").as_bytes())?;
-
-        output.debug(&format!("renew `{subject}` (total: {total})"));
     }
 
     // print totals