Change from structopt to clap

This allows printing the help message if no args are passed

Cargo.lock

@@ -822,15 +822,6 @@ dependencies = [
  "web-sys",
 ]
 
-[[package]]
-name = "heck"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
-dependencies = [
- "unicode-segmentation",
-]
-
 [[package]]
 name = "hermit-abi"
 version = "0.1.17"
@@ -1254,13 +1245,13 @@ name = "paperoni"
 version = "0.1.0-alpha1"
 dependencies = [
  "async-std",
+ "clap",
  "epub-builder",
  "html5ever",
  "kuchiki",
  "lazy_static",
  "md5",
  "regex",
- "structopt",
  "surf",
  "url",
 ]
@@ -1424,30 +1415,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
-[[package]]
-name = "proc-macro-error"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
-dependencies = [
- "proc-macro-error-attr",
- "proc-macro2",
- "quote",
- "syn",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error-attr"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
-dependencies = [
- "proc-macro2",
- "quote",
- "version_check",
-]
-
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.19"
@@ -1900,30 +1867,6 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
-[[package]]
-name = "structopt"
-version = "0.3.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "126d630294ec449fae0b16f964e35bf3c74f940da9dca17ee9b905f7b3112eb8"
-dependencies = [
- "clap",
- "lazy_static",
- "structopt-derive",
-]
-
-[[package]]
-name = "structopt-derive"
-version = "0.4.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65e51c492f9e23a220534971ff5afc14037289de430e3c83f9daf6a1b6ae91e8"
-dependencies = [
- "heck",
- "proc-macro-error",
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "subtle"
 version = "2.3.0"
@@ -2168,12 +2111,6 @@ dependencies = [
  "tinyvec",
 ]
 
-[[package]]
-name = "unicode-segmentation"
-version = "1.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db8716a166f290ff49dabc18b44aa407cb7c6dbe1aa0971b44b8a24b0ca35aae"
-
 [[package]]
 name = "unicode-width"
 version = "0.1.8"

Cargo.toml

@@ -13,6 +13,7 @@ readme = "README.md"
 
 [dependencies]
 async-std = "1.7.0"
+clap = "2.33.3"
 epub-builder = "0.4.8"
 html5ever = "0.25.1"
 kuchiki = "0.8.1"
@@ -20,5 +21,4 @@ lazy_static = "1.4.0"
 md5 = "0.7.0"
 regex = "1.4.2"
 surf = "2.1.0"
-structopt = { version = "0.3" }
 url = "2.2.0"

src/cli.rs

@@ -1,13 +1,21 @@
-use structopt::StructOpt;
+use clap::{App, AppSettings, Arg};
 
-#[derive(Debug, StructOpt)]
+pub fn cli_init() -> App<'static, 'static> {
-#[structopt(name = "paperoni")]
+    App::new("paperoni")
-/// Paperoni is an article downloader.
+        .settings(&[
-///
+            AppSettings::ArgRequiredElseHelp,
-/// It takes a url and downloads the article content from it and
+            AppSettings::UnifiedHelpMessage,
-/// saves it to an epub.
+        ])
-pub struct Opts {
+        .version("0.1.0-alpha1")
-    // #[structopt(conflicts_with("links"))]
+        .about(
-    /// Url of a web article
+            "
-    pub urls: Vec<String>,
+Paperoni is an article downloader.
+It takes a url and downloads the article content from it and saves it to an epub.
+        ",
+        )
+        .arg(
+            Arg::with_name("urls")
+                .help("Urls of web articles")
+                .multiple(true),
+        )
 }

src/main.rs

@@ -5,7 +5,6 @@ use std::fs::File;
 
 use async_std::task;
 use epub_builder::{EpubBuilder, EpubContent, ZipLibrary};
-use structopt::StructOpt;
 use url::Url;
 
 mod cli;
@@ -14,10 +13,11 @@ mod moz_readability;
 
 use extractor::Extractor;
 fn main() {
-    let opt = cli::Opts::from_args();
+    let app = cli::cli_init();
-    if !opt.urls.is_empty() {
+    let arg_matches = app.get_matches();
-        println!("Downloading single article");
+    if let Some(vals) = arg_matches.values_of("urls") {
-        download(opt.urls);
+        let urls = vals.map(|val| val.to_string()).collect::<Vec<_>>();
+        download(urls);
     }
 }