refactor: Use a template engine for generating the EPUB documents

The template engine of choice is Tera, mostly because I already knew
how to use it.

7 files changed, 540 insertions, 73 deletions

diff --git a/Cargo.lock b/Cargo.lock
index b7f37c2..9938766 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,14 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
+name = "aho-corasick"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -19,11 +27,70 @@ dependencies = [
 ]
 
 [[package]]
+name = "autocfg"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "backtrace"
+version = "0.3.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "bitflags"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "block-buffer"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "block-padding 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "block-padding"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "byte-tools"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "byteorder"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cc"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "celtchar"
 version = "0.1.0"
 dependencies = [
@@ -31,6 +98,7 @@ dependencies = [
  "ogmarkup 0.1.0 (git+https://git.sr.ht/~lthms/ogmarkup/?rev=feaf8d0cbc7aa34ac521020914df91489ef24595)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tera 0.11.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -40,6 +108,17 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "chrono"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "clap"
 version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -54,6 +133,71 @@ dependencies = [
 ]
 
 [[package]]
+name = "deunicode"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "digest"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "error-chain"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace 0.3.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "fake-simd"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "generic-array"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "glob"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "humansize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "idna"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "lazy_static"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "lexical-core"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -71,6 +215,16 @@ version = "0.2.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "maplit"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "matches"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "memchr"
 version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -86,6 +240,23 @@ dependencies = [
 ]
 
 [[package]]
+name = "num-integer"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "numtoa"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -99,6 +270,55 @@ dependencies = [
 ]
 
 [[package]]
+name = "opaque-debug"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "percent-encoding"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "pest"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-trie 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "pest 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pest_generator 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "pest 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pest_meta 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "maplit 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pest 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha-1 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "proc-macro2"
 version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -128,6 +348,28 @@ dependencies = [
 ]
 
 [[package]]
+name = "regex"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "rustc_version"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -169,6 +411,40 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde_json"
+version = "1.0.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "sha-1"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "slug"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "deunicode 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "smallvec"
+version = "0.6.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "stackvector"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -198,6 +474,26 @@ dependencies = [
 ]
 
 [[package]]
+name = "tera"
+version = "0.11.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "humansize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pest 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pest_derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unic-segment 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "termion"
 version = "1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -217,6 +513,24 @@ dependencies = [
 ]
 
 [[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "time"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.54 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "toml"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -225,6 +539,76 @@ dependencies = [
 ]
 
 [[package]]
+name = "typenum"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unic-char-property"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unic-char-range 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unic-char-range"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unic-common"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unic-segment"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unic-ucd-segment 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unic-ucd-segment"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unic-char-property 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unic-char-range 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unic-ucd-version 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unic-ucd-version"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unic-common 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "unicode-width"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -243,6 +627,21 @@ dependencies = [
 ]
 
 [[package]]
+name = "url"
+version = "1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "utf8-ranges"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "vec_map"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -277,37 +676,89 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
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+"checksum autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "22130e92352b948e7e82a49cdb0aa94f2211761117f29e052dd397c1ac33542b"
+"checksum backtrace 0.3.34 (registry+https://github.com/rust-lang/crates.io-index)" = "b5164d292487f037ece34ec0de2fcede2faa162f085dd96d2385ab81b12765ba"
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diff --git a/Cargo.toml b/Cargo.toml
index dc90935..4838afb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ toml = "0.5"
 clap = "2.33"
 serde = "1.0"
 serde_derive = "1.0"
+tera = "0.11"
 
 [dependencies.ogmarkup]
 git = "https://git.sr.ht/~lthms/ogmarkup/"
diff --git a/src/epub.rs b/src/epub.rs
index 191f487..c9cd541 100644
--- a/src/epub.rs
+++ b/src/epub.rs
@@ -1,14 +1,26 @@
 use crate::project::{Error, Project, Chapter};
-use std::fs::{create_dir, create_dir_all};
-use std::path::PathBuf;
+use std::fs::{create_dir_all};
+use std::path::{Path, PathBuf};
+use tera::{Tera, Context};
 
 const EPUB_MIMETYPE: &'static str = "application/epub+zip";
-const CONTAINER_XML: &'static str = r#"<?xml version="1.0"?>
-<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
-  <rootfiles>
-    <rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
-  </rootfiles>
-</container>"#;
+
+fn write_template_to(tera : &Tera, template : &str, ctx : &Context, path : &PathBuf) -> Result<(), Error> {
+    let directory : &Path = path.parent().ok_or(Error(String::from("is not a file")))?;
+
+    if !directory.exists() {
+        create_dir_all(directory)
+            .map_err(|_| Error(format!("cannot create directory {:?}", directory)))?;
+    }
+
+    let content = tera.render(template, ctx)
+        .map_err(|e| Error(format!("cannot render {}: {}", template, e)))?;
+
+    std::fs::write(path, content)
+        .map_err(|_| Error(format!("cannot create {:?}", path)))?;
+
+    Ok(())
+}
 
 fn create_mimetype() -> Result<(), Error> {
     std::fs::write("mimetype", EPUB_MIMETYPE)
@@ -17,29 +29,33 @@ fn create_mimetype() -> Result<(), Error> {
     Ok(())
 }
 
-fn create_container() -> Result<(), Error> {
-    create_dir("META-INF")
-        .map_err(|_| Error(String::from("cannot create META-INF")))?;
+fn create_container(tera : &Tera) -> Result<(), Error> {
+    write_template_to(
+        tera,
+        "container.xml",
+        &Context::default(),
+        &PathBuf::from("META-INF/container.xml")
+    )?;
 
-    std::fs::write("META-INF/container.xml", CONTAINER_XML)
-        .map_err(|_| Error(String::from("cannot create container.xml")))?;
 
     Ok(())
 }
 
-fn create_chapters(chapters : &Vec<Chapter<String>>) -> Result<Vec<String>, Error> {
+fn create_chapters(tera : &Tera, chapters : &Vec<Chapter<String>>) -> Result<Vec<String>, Error> {
 
     chapters.iter().enumerate()
         .map(|(idx, c)| {
+            let mut ctx = Context::new();
+            ctx.insert("content", &c.content);
+
             let path : String = format!("{}.xhtml", idx);
-            std::fs::write(
-                PathBuf::from(format!("OEBPS/Text/{}", path)).as_path(),
-                format!(
-                    "<html><head></head><body>{}</body></html>",
-                    c.content.as_str()
-                )
-            )
-                .map_err(|_| Error(format!("cannot create {:?}", path)))?;
+
+            write_template_to(
+                tera,
+                "chapter.xhtml",
+                &ctx,
+                &PathBuf::from(format!("OEBPS/Text/{}", path))
+            )?;
 
             Ok(path)
         })
@@ -47,62 +63,25 @@ fn create_chapters(chapters : &Vec<Chapter<String>>) -> Result<Vec<String>, Erro
 }
 
 pub fn generate(project : &Project<String>) -> Result<(), Error> {
-    create_mimetype()?;
-    create_container()?;
 
-    create_dir_all("OEBPS/Text")
-        .map_err(|_| Error(String::from("cannot create OEBPS")))?;
+    let tera = compile_templates!("../templates/**/*");
 
-    let files = create_chapters(&project.chapters)?;
+    create_mimetype()?;
+    create_container(&tera)?;
 
-    let mut filesxml = String::from("");
-    for f in files.iter() {
-        filesxml.push_str(
-            format!(
-                r#"<item href="Text/{}" id="{}" media-type="application/xhtml+xml" />"#,
-                f, f
-            ).as_str()
-        );
-    }
+    let files = create_chapters(&tera, &project.chapters)?;
 
-    let mut spine = String::from("");
-    for f in files.iter() {
-        spine.push_str(
-            format!(
-                r#"<itemref idref="{}" />"#,
-                f
-            ).as_str()
-        );
-    }
+    let mut ctx = Context::new();
+    ctx.insert("title", &project.title);
+    ctx.insert("author", &project.author);
+    ctx.insert("files", &files);
 
-    std::fs::write(
-        "OEBPS/content.opf",
-        format!(
-            r#"<?xml version="1.0" encoding="utf-8" standalone="yes"?>
-<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookId" version="2.0" xmlns:opf="http://www.idpf.org/2007/opf">
-  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
-    <dc:title>{}</dc:title>
-    <dc:language>fr</dc:language>
-    <dc:creator opf:role="aut">{}</dc:creator>
-    <dc:type>text</dc:type>
-    <dc:description>Ceci est une description</dc:description>
-  </metadata>
-  <manifest>
-    <item href="toc.ncx" id="ncx" media-type="application/x-dtbncx+xml" />
-    {}
-  </manifest>
-  <spine toc="ncxtoc">
-    {}
-  </spine>
-</package>
-"#,
-            project.title,
-            project.author,
-            filesxml,
-            spine
-        )
-    )
-        .map_err(|_| Error(String::from("cannot create content.opf")))?;
+    write_template_to(
+        &tera,
+        "content.opf",
+        &ctx,
+        &PathBuf::from("OEBPS/content.opf")
+    )?;
 
     Ok(())
 }
diff --git a/src/main.rs b/src/main.rs
index 112efb0..956bb78 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,8 @@ extern crate clap;
 extern crate ogmarkup;
 extern crate serde_derive;
 extern crate toml;
+#[macro_use]
+extern crate tera;
 
 use clap::{App, SubCommand};
 
diff --git a/templates/chapter.xhtml b/templates/chapter.xhtml
new file mode 100644
index 0000000..84541d0
--- /dev/null
+++ b/templates/chapter.xhtml
@@ -0,0 +1,7 @@
+<html>
+  <head>
+  </head>
+  <body>
+    {{ content }}
+  </body>
+</html>
diff --git a/templates/container.xml b/templates/container.xml
new file mode 100644
index 0000000..bad9982
--- /dev/null
+++ b/templates/container.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0"?>
+<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
+  <rootfiles>
+    <rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
+  </rootfiles>
+</container>
diff --git a/templates/content.opf b/templates/content.opf
new file mode 100644
index 0000000..f96ac34
--- /dev/null
+++ b/templates/content.opf
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes"?>
+<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookId" version="2.0" xmlns:opf="http://www.idpf.org/2007/opf">
+  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <dc:title>{{ title }}</dc:title>
+    <dc:language>fr</dc:language>
+    <dc:creator opf:role="aut">{{ author }}</dc:creator>
+    <dc:type>text</dc:type>
+    <dc:description>Ceci est une description</dc:description>
+  </metadata>
+  <manifest>
+    <item href="toc.ncx" id="ncx" media-type="application/x-dtbncx+xml" />
+    {% for f in files %}
+    <item href="Text/{{ f }}" id="{{ f }}" media-type="application/xhtml+xml" />
+    {% endfor %}
+  </manifest>
+  <spine toc="ncxtoc">
+    {% for f in files %}
+    <itemref idref="{{ f }}" />
+    {% endfor %}
+  </spine>
+</package>
\ No newline at end of file