add odt feature flag

closes #61 by making odt output optional

Cargo.toml

@@ -41,6 +41,7 @@ default = ["binary", "proofread", "syntect"]
 proofread = ["caribon", "reqwest", "url", "serde", "serde", "serde_json", "serde_derive"]
 binary = ["clap", "simplelog", "tempdir", "console", "indicatif", "textwrap"]
 nightly = ["punkt", "hyphenation"]
+odt = []
 
 [build-dependencies]
 crowbook-intl = "0.2"

src/lib/book.rs

@@ -29,6 +29,7 @@ use crate::lang;
 use crate::latex::{Latex, Pdf, ProofLatex, ProofPdf};
 use crate::misc;
 use crate::number::Number;
+#[cfg(feature = "odt")]
 use crate::odt::Odt;
 use crate::parser::Features;
 use crate::parser::Parser;
@@ -239,12 +240,13 @@ impl Book {
             Box::new(ProofPdf {}),
         )
         .add_format("epub", lformat!("EPUB"), Box::new(Epub {}))
-        .add_format("odt", lformat!("ODT"), Box::new(Odt {}))
         .add_format(
             "html.if",
             lformat!("HTML (interactive fiction)"),
             Box::new(HtmlIf {}),
         );
+        #[cfg(feature = "odt")]
+        book.add_format("odt", lformat!("ODT"), Box::new(Odt {}));
         book
     }
 

src/lib/lib.rs

@@ -145,6 +145,7 @@ mod html_single;
 mod lang;
 mod latex;
 mod number;
+#[cfg(feature = "odt")]
 mod odt;
 mod parser;
 mod renderer;

src/lib/templates.rs

@@ -67,6 +67,7 @@ pub mod epub3 {
     pub static TITLE: &str = include_str!("../../templates/epub3/titlepage.xhtml");
 }
 
+#[cfg(features = "odt")]
 pub mod odt {
     pub static CONTENT: &str = include_str!("../../templates/odt/content.xml");
     pub static ODT: &[u8] = include_bytes!("../../templates/odt/template.odt");

src/lib/zipper.rs

@@ -106,6 +106,7 @@ This is forbidden because we are supposed \
     }
 
     /// Unzip a file and deletes it afterwards
+    #[cfg(features = "odt")]
     pub fn unzip(&mut self, file: &str) -> Result<()> {
         let output = Command::new("unzip")
             .current_dir(&self.path)
@@ -191,6 +192,7 @@ This is forbidden because we are supposed \
     }
 
     /// zip all files in zipper's tmp dir to a given file name and write to odt file
+    #[cfg(features = "odt")]
     pub fn generate_odt(&mut self, command_name: &str, odt_file: &mut dyn Write) -> Result<String> {
         let mut command = Command::new(command_name);
         command.arg("-r");