initial commit: The OrbTK book source tree

All files have a strong relation to the book sources of the
rust-lang project itself. This may help to lower the burden
for intrested people to get involved in OrbTK as well as
reuse workflow habits.

* LICENSE-MIT: The projekt licensing terms
* README.md: Github frontpage
* CONTIRBUTING.md: Advises on howto help improving the book
* style-guide.md: Advises on howto improve the readability of
  generated prose and code.
* tools: layout helper scripts and rust-code
* ci: continius integration helper scripts
* .gitattributes: set git default behaviours
* .gitignore: keep source tree sane
* Cargo.toml: package dependencies
* rustfmt.toml: formatting rules for rust code
* book.toml: mdBook dependencies

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

tools/convert-quotes.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -eu
+
+dir=$1
+
+mkdir -p "tmp/$dir"
+
+for f in $dir/*.md
+do
+    cat "$f" | cargo run --bin convert_quotes > "tmp/$f"
+    mv "tmp/$f" "$f"
+done

tools/doc-to-md.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -eu
+
+# Get all the docx files in the tmp dir.
+ls tmp/*.docx | \
+# Extract just the filename so we can reuse it easily.
+xargs -n 1 basename -s .docx | \
+while IFS= read -r filename; do
+    # Make a directory to put the XML in.
+    mkdir -p "tmp/$filename"
+    # Unzip the docx to get at the XML.
+    unzip -o "tmp/$filename.docx" -d "tmp/$filename"
+    # Convert to markdown with XSL.
+    xsltproc tools/docx-to-md.xsl "tmp/$filename/word/document.xml" | \
+    # Hard wrap at 80 chars at word bourdaries.
+    fold -w 80 -s | \
+    # Remove trailing whitespace and save in the `nostarch` dir for comparison.
+    sed -e "s/ *$//" > "nostarch/$filename.md"
+done

tools/docx-to-md.xsl

@@ -0,0 +1,220 @@
+<?xml version="1.0"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:wp14="http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml">
+    <xsl:output method="text" />
+    <xsl:template match="/">
+        <xsl:apply-templates select="/w:document/w:body/*" />
+    </xsl:template>
+
+    <!-- Ignore these -->
+    <xsl:template match="w:p[starts-with(w:pPr/w:pStyle/@w:val, 'TOC')]" />
+    <xsl:template match="w:p[starts-with(w:pPr/w:pStyle/@w:val, 'Contents1')]" />
+    <xsl:template match="w:p[starts-with(w:pPr/w:pStyle/@w:val, 'Contents2')]" />
+    <xsl:template match="w:p[starts-with(w:pPr/w:pStyle/@w:val, 'Contents3')]" />
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'ChapterStart']" />
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'Normal']" />
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'Standard']" />
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'AuthorQuery']" />
+
+    <xsl:template match="w:p[w:pPr[not(w:pStyle)]]" />
+
+    <!-- Paragraph styles -->
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'ChapterTitle']">
+        <xsl:text>&#10;[TOC]&#10;&#10;</xsl:text>
+        <xsl:text># </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'HeadA']">
+        <xsl:text>## </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'HeadB']">
+        <xsl:text>### </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'HeadC']">
+        <xsl:text>#### </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'HeadBox']">
+        <xsl:text>### </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'NumListA' or @w:val = 'NumListB']]">
+        <xsl:text>1. </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'NumListC']]">
+        <xsl:text>1. </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'BulletA' or @w:val = 'BulletB' or @w:val = 'ListPlainA' or @w:val = 'ListPlainB']]">
+        <xsl:text>* </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'BulletC' or @w:val = 'ListPlainC']]">
+        <xsl:text>* </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'SubBullet']]">
+        <xsl:text>  * </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'BodyFirst' or @w:val = 'Body' or @w:val = 'BodyFirstBox' or @w:val = 'BodyBox' or @w:val = '1stPara']]">
+        <xsl:if test=".//w:t">
+            <xsl:apply-templates select="*" />
+            <xsl:text>&#10;&#10;</xsl:text>
+        </xsl:if>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'CodeA' or @w:val = 'CodeAWingding']]">
+        <xsl:text>```&#10;</xsl:text>
+        <!-- Don't apply Emphasis/etc templates in code blocks -->
+        <xsl:for-each select="w:r">
+            <xsl:value-of select="w:t" />
+        </xsl:for-each>
+        <xsl:text>&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'CodeB' or @w:val = 'CodeBWingding']]">
+        <!-- Don't apply Emphasis/etc templates in code blocks -->
+        <xsl:for-each select="w:r">
+            <xsl:value-of select="w:t" />
+        </xsl:for-each>
+        <xsl:text>&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'CodeC' or @w:val = 'CodeCWingding']]">
+        <!-- Don't apply Emphasis/etc templates in code blocks -->
+        <xsl:for-each select="w:r">
+            <xsl:value-of select="w:t" />
+        </xsl:for-each>
+        <xsl:text>&#10;```&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'CodeSingle']">
+        <xsl:text>```&#10;</xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;```&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'ProductionDirective']">
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'Caption' or @w:val = 'TableTitle' or @w:val = 'Caption1' or @w:val = 'Listing']]">
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'BlockQuote']]">
+        <xsl:text>> </xsl:text>
+        <xsl:apply-templates select="*" />
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle[@w:val = 'BlockText']]">
+        <xsl:text>&#10;</xsl:text>
+        <xsl:text>> </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p[w:pPr/w:pStyle/@w:val = 'Note']">
+        <xsl:text>> </xsl:text>
+        <xsl:apply-templates select="*" />
+        <xsl:text>&#10;&#10;</xsl:text>
+    </xsl:template>
+
+    <xsl:template match="w:p">
+Unmatched: <xsl:value-of select="w:pPr/w:pStyle/@w:val" />
+      <xsl:text>
+      </xsl:text>
+
+
+    </xsl:template>
+
+    <!-- Character styles -->
+
+    <xsl:template match="w:r[w:rPr/w:rStyle[@w:val = 'Literal' or @w:val = 'LiteralBold' or @w:val = 'LiteralCaption' or @w:val = 'LiteralBox']]">
+        <xsl:choose>
+            <xsl:when test="normalize-space(w:t) != ''">
+                <xsl:if test="starts-with(w:t, ' ')">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+                <xsl:text>`</xsl:text>
+                <xsl:value-of select="normalize-space(w:t)" />
+                <xsl:text>`</xsl:text>
+                <xsl:if test="substring(w:t, string-length(w:t)) = ' '">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+            </xsl:when>
+            <xsl:when test="normalize-space(w:t) != w:t and w:t != ''">
+                <xsl:text> </xsl:text>
+            </xsl:when>
+        </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="w:r[w:rPr/w:rStyle[@w:val = 'EmphasisBold']]">
+        <xsl:choose>
+            <xsl:when test="normalize-space(w:t) != ''">
+                <xsl:if test="starts-with(w:t, ' ')">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+                <xsl:text>**</xsl:text>
+                <xsl:value-of select="normalize-space(w:t)" />
+                <xsl:text>**</xsl:text>
+                <xsl:if test="substring(w:t, string-length(w:t)) = ' '">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+            </xsl:when>
+            <xsl:when test="normalize-space(w:t) != w:t and w:t != ''">
+                <xsl:text> </xsl:text>
+            </xsl:when>
+        </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="w:r[w:rPr/w:rStyle[@w:val = 'EmphasisItalic' or @w:val = 'EmphasisItalicBox' or @w:val = 'EmphasisNote' or @w:val = 'EmphasisRevCaption' or @w:val = 'EmphasisRevItal']]">
+        <xsl:choose>
+            <xsl:when test="normalize-space(w:t) != ''">
+                <xsl:if test="starts-with(w:t, ' ')">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+                <xsl:text>*</xsl:text>
+                <xsl:value-of select="normalize-space(w:t)" />
+                <xsl:text>*</xsl:text>
+                <xsl:if test="substring(w:t, string-length(w:t)) = ' '">
+                    <xsl:text> </xsl:text>
+                </xsl:if>
+            </xsl:when>
+            <xsl:otherwise>
+                <xsl:text> </xsl:text>
+            </xsl:otherwise>
+        </xsl:choose>
+    </xsl:template>
+
+    <xsl:template match="w:r">
+        <xsl:value-of select="w:t" />
+    </xsl:template>
+</xsl:stylesheet>

tools/megadiff.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -eu
+
+# Remove files that are never affected by rustfmt or are otherwise uninteresting
+rm -rf tmp/book-before/css/ tmp/book-before/theme/ tmp/book-before/img/ tmp/book-before/*.js \
+       tmp/book-before/FontAwesome tmp/book-before/*.css tmp/book-before/*.png \
+       tmp/book-before/*.json tmp/book-before/print.html
+
+rm -rf tmp/book-after/css/ tmp/book-after/theme/ tmp/book-after/img/ tmp/book-after/*.js \
+      tmp/book-after/FontAwesome tmp/book-after/*.css tmp/book-after/*.png \
+      tmp/book-after/*.json tmp/book-after/print.html
+
+# Get all the html files before
+ls tmp/book-before/*.html | \
+# Extract just the filename so we can reuse it easily.
+xargs -n 1 basename | \
+while IFS= read -r filename; do
+    # Remove any files that are the same before and after
+    diff "tmp/book-before/$filename" "tmp/book-after/$filename" > /dev/null \
+      && rm "tmp/book-before/$filename" "tmp/book-after/$filename"
+done

tools/nostarch.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -eu
+
+cargo build --release
+
+mkdir -p tmp
+rm -rf tmp/*.md
+rm -rf tmp/markdown
+
+# Render the book as Markdown to include all the code listings
+MDBOOK_OUTPUT__MARKDOWN=1 mdbook build -d tmp
+
+# Get all the Markdown files
+ls tmp/markdown/${1:-""}*.md | \
+# Extract just the filename so we can reuse it easily.
+xargs -n 1 basename | \
+# Remove all links followed by `<!-- ignore -->``, then
+# Change all remaining links from Markdown to italicized inline text.
+while IFS= read -r filename; do
+  < "tmp/markdown/$filename" ./target/release/remove_links \
+    | ./target/release/link2print \
+    | ./target/release/remove_markup \
+    | ./target/release/remove_hidden_lines > "tmp/$filename"
+done
+# Concatenate the files into the `nostarch` dir.
+./target/release/concat_chapters tmp nostarch

tools/src/bin/concat_chapters.rs

@@ -0,0 +1,115 @@
+#[macro_use]
+extern crate lazy_static;
+
+use std::collections::BTreeMap;
+use std::env;
+use std::fs::{create_dir, read_dir, File};
+use std::io;
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use std::process::exit;
+
+use regex::Regex;
+
+static PATTERNS: &'static [(&'static str, &'static str)] = &[
+    (r"ch(\d\d)-\d\d-.*\.md", "chapter$1.md"),
+    (r"appendix-(\d\d).*\.md", "appendix.md"),
+];
+
+lazy_static! {
+    static ref MATCHERS: Vec<(Regex, &'static str)> = {
+        PATTERNS
+            .iter()
+            .map(|&(expr, repl)| (Regex::new(expr).unwrap(), repl))
+            .collect()
+    };
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() < 3 {
+        println!("Usage: {} <src-dir> <target-dir>", args[0]);
+        exit(1);
+    }
+
+    let source_dir = ensure_dir_exists(&args[1]).unwrap();
+    let target_dir = ensure_dir_exists(&args[2]).unwrap();
+
+    let mut matched_files = match_files(source_dir, target_dir);
+    matched_files.sort();
+
+    for (target_path, source_paths) in group_by_target(matched_files) {
+        concat_files(source_paths, target_path).unwrap();
+    }
+}
+
+fn match_files(
+    source_dir: &Path,
+    target_dir: &Path,
+) -> Vec<(PathBuf, PathBuf)> {
+    read_dir(source_dir)
+        .expect("Unable to read source directory")
+        .filter_map(|maybe_entry| maybe_entry.ok())
+        .filter_map(|entry| {
+            let source_filename = entry.file_name();
+            let source_filename =
+                &source_filename.to_string_lossy().into_owned();
+            for &(ref regex, replacement) in MATCHERS.iter() {
+                if regex.is_match(source_filename) {
+                    let target_filename =
+                        regex.replace_all(source_filename, replacement);
+                    let source_path = entry.path();
+                    let mut target_path = PathBuf::from(&target_dir);
+                    target_path.push(target_filename.to_string());
+                    return Some((source_path, target_path));
+                }
+            }
+            None
+        })
+        .collect()
+}
+
+fn group_by_target(
+    matched_files: Vec<(PathBuf, PathBuf)>,
+) -> BTreeMap<PathBuf, Vec<PathBuf>> {
+    let mut grouped: BTreeMap<PathBuf, Vec<PathBuf>> = BTreeMap::new();
+    for (source, target) in matched_files {
+        if let Some(source_paths) = grouped.get_mut(&target) {
+            source_paths.push(source);
+            continue;
+        }
+        let source_paths = vec![source];
+        grouped.insert(target.clone(), source_paths);
+    }
+    grouped
+}
+
+fn concat_files(
+    source_paths: Vec<PathBuf>,
+    target_path: PathBuf,
+) -> io::Result<()> {
+    println!("Concatenating into {}:", target_path.to_string_lossy());
+    let mut target = File::create(target_path)?;
+    target.write_all(b"\n[TOC]\n")?;
+
+    for path in source_paths {
+        println!("  {}", path.to_string_lossy());
+        let mut source = File::open(path)?;
+        let mut contents: Vec<u8> = Vec::new();
+        source.read_to_end(&mut contents)?;
+
+        target.write_all(b"\n")?;
+        target.write_all(&contents)?;
+        target.write_all(b"\n")?;
+    }
+    Ok(())
+}
+
+fn ensure_dir_exists(dir_string: &str) -> io::Result<&Path> {
+    let path = Path::new(dir_string);
+    if !path.exists() {
+        create_dir(path)?;
+    }
+    Ok(&path)
+}

tools/src/bin/convert_quotes.rs

@@ -0,0 +1,78 @@
+use std::io;
+use std::io::{Read, Write};
+
+fn main() {
+    let mut is_in_code_block = false;
+    let mut is_in_inline_code = false;
+    let mut is_in_html_tag = false;
+
+    let mut buffer = String::new();
+    if let Err(e) = io::stdin().read_to_string(&mut buffer) {
+        panic!(e);
+    }
+
+    for line in buffer.lines() {
+        if line.is_empty() {
+            is_in_inline_code = false;
+        }
+        if line.starts_with("```") {
+            is_in_code_block = !is_in_code_block;
+        }
+        if is_in_code_block {
+            is_in_inline_code = false;
+            is_in_html_tag = false;
+            write!(io::stdout(), "{}\n", line).unwrap();
+        } else {
+            let modified_line = &mut String::new();
+            let mut previous_char = std::char::REPLACEMENT_CHARACTER;
+            let mut chars_in_line = line.chars();
+
+            while let Some(possible_match) = chars_in_line.next() {
+                // Check if inside inline code.
+                if possible_match == '`' {
+                    is_in_inline_code = !is_in_inline_code;
+                }
+                // Check if inside HTML tag.
+                if possible_match == '<' && !is_in_inline_code {
+                    is_in_html_tag = true;
+                }
+                if possible_match == '>' && !is_in_inline_code {
+                    is_in_html_tag = false;
+                }
+
+                // Replace with right/left apostrophe/quote.
+                let char_to_push = if possible_match == '\''
+                    && !is_in_inline_code
+                    && !is_in_html_tag
+                {
+                    if (previous_char != std::char::REPLACEMENT_CHARACTER
+                        && !previous_char.is_whitespace())
+                        || previous_char == '‘'
+                    {
+                        '’'
+                    } else {
+                        '‘'
+                    }
+                } else if possible_match == '"'
+                    && !is_in_inline_code
+                    && !is_in_html_tag
+                {
+                    if (previous_char != std::char::REPLACEMENT_CHARACTER
+                        && !previous_char.is_whitespace())
+                        || previous_char == '“'
+                    {
+                        '”'
+                    } else {
+                        '“'
+                    }
+                } else {
+                    // Leave untouched.
+                    possible_match
+                };
+                modified_line.push(char_to_push);
+                previous_char = char_to_push;
+            }
+            write!(io::stdout(), "{}\n", modified_line).unwrap();
+        }
+    }
+}

tools/src/bin/lfp.rs

@@ -0,0 +1,252 @@
+// We have some long regex literals, so:
+// ignore-tidy-linelength
+
+use docopt::Docopt;
+use serde::Deserialize;
+use std::io::BufRead;
+use std::{fs, io, path};
+
+fn main() {
+    let args: Args = Docopt::new(USAGE)
+        .and_then(|d| d.deserialize())
+        .unwrap_or_else(|e| e.exit());
+
+    let src_dir = &path::Path::new(&args.arg_src_dir);
+    let found_errs = walkdir::WalkDir::new(src_dir)
+        .min_depth(1)
+        .into_iter()
+        .map(|entry| match entry {
+            Ok(entry) => entry,
+            Err(err) => {
+                eprintln!("{:?}", err);
+                std::process::exit(911)
+            }
+        })
+        .map(|entry| {
+            let path = entry.path();
+            if is_file_of_interest(path) {
+                let err_vec = lint_file(path);
+                for err in &err_vec {
+                    match *err {
+                        LintingError::LineOfInterest(line_num, ref line) => {
+                            eprintln!(
+                                "{}:{}\t{}",
+                                path.display(),
+                                line_num,
+                                line
+                            )
+                        }
+                        LintingError::UnableToOpenFile => {
+                            eprintln!("Unable to open {}.", path.display())
+                        }
+                    }
+                }
+                !err_vec.is_empty()
+            } else {
+                false
+            }
+        })
+        .collect::<Vec<_>>()
+        .iter()
+        .any(|result| *result);
+
+    if found_errs {
+        std::process::exit(1)
+    } else {
+        std::process::exit(0)
+    }
+}
+
+const USAGE: &'static str = "
+counter
+Usage:
+  lfp <src-dir>
+  lfp (-h | --help)
+Options:
+  -h --help         Show this screen.
+";
+
+#[derive(Debug, Deserialize)]
+struct Args {
+    arg_src_dir: String,
+}
+
+fn lint_file(path: &path::Path) -> Vec<LintingError> {
+    match fs::File::open(path) {
+        Ok(file) => lint_lines(io::BufReader::new(&file).lines()),
+        Err(_) => vec![LintingError::UnableToOpenFile],
+    }
+}
+
+fn lint_lines<I>(lines: I) -> Vec<LintingError>
+where
+    I: Iterator<Item = io::Result<String>>,
+{
+    lines
+        .enumerate()
+        .map(|(line_num, line)| {
+            let raw_line = line.unwrap();
+            if is_line_of_interest(&raw_line) {
+                Err(LintingError::LineOfInterest(line_num, raw_line))
+            } else {
+                Ok(())
+            }
+        })
+        .filter(|result| result.is_err())
+        .map(|result| result.unwrap_err())
+        .collect()
+}
+
+fn is_file_of_interest(path: &path::Path) -> bool {
+    path.extension().map_or(false, |ext| ext == "md")
+}
+
+fn is_line_of_interest(line: &str) -> bool {
+    !line
+        .split_whitespace()
+        .filter(|sub_string| {
+            sub_string.contains("file://")
+                && !sub_string.contains("file:///projects/")
+        })
+        .collect::<Vec<_>>()
+        .is_empty()
+}
+
+#[derive(Debug)]
+enum LintingError {
+    UnableToOpenFile,
+    LineOfInterest(usize, String),
+}
+
+#[cfg(test)]
+mod tests {
+
+    use std::path;
+
+    #[test]
+    fn lint_file_returns_a_vec_with_errs_when_lines_of_interest_are_found() {
+        let string = r#"
+        $ cargo run
+               Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)
+                 Running `target/guessing_game`
+            Guess the number!
+            The secret number is: 61
+            Please input your guess.
+            10
+            You guessed: 10
+            Too small!
+            Please input your guess.
+            99
+            You guessed: 99
+            Too big!
+            Please input your guess.
+            foo
+            Please input your guess.
+            61
+            You guessed: 61
+            You win!
+            $ cargo run
+               Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)
+                 Running `target/debug/guessing_game`
+            Guess the number!
+            The secret number is: 7
+            Please input your guess.
+            4
+            You guessed: 4
+            $ cargo run
+                 Running `target/debug/guessing_game`
+            Guess the number!
+            The secret number is: 83
+            Please input your guess.
+            5
+            $ cargo run
+               Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)
+                 Running `target/debug/guessing_game`
+            Hello, world!
+        "#;
+
+        let raw_lines = string.to_string();
+        let lines = raw_lines.lines().map(|line| Ok(line.to_string()));
+
+        let result_vec = super::lint_lines(lines);
+
+        assert!(!result_vec.is_empty());
+        assert_eq!(3, result_vec.len());
+    }
+
+    #[test]
+    fn lint_file_returns_an_empty_vec_when_no_lines_of_interest_are_found() {
+        let string = r#"
+            $ cargo run
+               Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+                 Running `target/guessing_game`
+            Guess the number!
+            The secret number is: 61
+            Please input your guess.
+            10
+            You guessed: 10
+            Too small!
+            Please input your guess.
+            99
+            You guessed: 99
+            Too big!
+            Please input your guess.
+            foo
+            Please input your guess.
+            61
+            You guessed: 61
+            You win!
+        "#;
+
+        let raw_lines = string.to_string();
+        let lines = raw_lines.lines().map(|line| Ok(line.to_string()));
+
+        let result_vec = super::lint_lines(lines);
+
+        assert!(result_vec.is_empty());
+    }
+
+    #[test]
+    fn is_file_of_interest_returns_false_when_the_path_is_a_directory() {
+        let uninteresting_fn = "src/img";
+
+        assert!(!super::is_file_of_interest(path::Path::new(
+            uninteresting_fn
+        )));
+    }
+
+    #[test]
+    fn is_file_of_interest_returns_false_when_the_filename_does_not_have_the_md_extension(
+    ) {
+        let uninteresting_fn = "src/img/foo1.png";
+
+        assert!(!super::is_file_of_interest(path::Path::new(
+            uninteresting_fn
+        )));
+    }
+
+    #[test]
+    fn is_file_of_interest_returns_true_when_the_filename_has_the_md_extension()
+    {
+        let interesting_fn = "src/ch01-00-introduction.md";
+
+        assert!(super::is_file_of_interest(path::Path::new(interesting_fn)));
+    }
+
+    #[test]
+    fn is_line_of_interest_does_not_report_a_line_if_the_line_contains_a_file_url_which_is_directly_followed_by_the_project_path(
+    ) {
+        let sample_line =
+            "Compiling guessing_game v0.1.0 (file:///projects/guessing_game)";
+
+        assert!(!super::is_line_of_interest(sample_line));
+    }
+
+    #[test]
+    fn is_line_of_interest_reports_a_line_if_the_line_contains_a_file_url_which_is_not_directly_followed_by_the_project_path(
+    ) {
+        let sample_line = "Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)";
+
+        assert!(super::is_line_of_interest(sample_line));
+    }
+}

tools/src/bin/link2print.rs

@@ -0,0 +1,415 @@
+// FIXME: we have some long lines that could be refactored, but it's not a big deal.
+// ignore-tidy-linelength
+
+use regex::{Captures, Regex};
+use std::collections::HashMap;
+use std::io;
+use std::io::{Read, Write};
+
+fn main() {
+    write_md(parse_links(parse_references(read_md())));
+}
+
+fn read_md() -> String {
+    let mut buffer = String::new();
+    match io::stdin().read_to_string(&mut buffer) {
+        Ok(_) => buffer,
+        Err(error) => panic!(error),
+    }
+}
+
+fn write_md(output: String) {
+    write!(io::stdout(), "{}", output).unwrap();
+}
+
+fn parse_references(buffer: String) -> (String, HashMap<String, String>) {
+    let mut ref_map = HashMap::new();
+    // FIXME: currently doesn't handle "title" in following line.
+    let re = Regex::new(r###"(?m)\n?^ {0,3}\[([^]]+)\]:[[:blank:]]*(.*)$"###)
+        .unwrap();
+    let output = re.replace_all(&buffer, |caps: &Captures<'_>| {
+        let key = caps.get(1).unwrap().as_str().to_uppercase();
+        let val = caps.get(2).unwrap().as_str().to_string();
+        if ref_map.insert(key, val).is_some() {
+            panic!("Did not expect markdown page to have duplicate reference");
+        }
+        "".to_string()
+    }).to_string();
+    (output, ref_map)
+}
+
+fn parse_links((buffer, ref_map): (String, HashMap<String, String>)) -> String {
+    // FIXME: check which punctuation is allowed by spec.
+    let re = Regex::new(r###"(?:(?P<pre>(?:```(?:[^`]|`[^`])*`?\n```\n)|(?:[^\[]`[^`\n]+[\n]?[^`\n]*`))|(?:\[(?P<name>[^]]+)\](?:(?:\([[:blank:]]*(?P<val>[^")]*[^ ])(?:[[:blank:]]*"[^"]*")?\))|(?:\[(?P<key>[^]]*)\]))?))"###).expect("could not create regex");
+    let error_code =
+        Regex::new(r###"^E\d{4}$"###).expect("could not create regex");
+    let output = re.replace_all(&buffer, |caps: &Captures<'_>| {
+        match caps.name("pre") {
+            Some(pre_section) => format!("{}", pre_section.as_str()),
+            None => {
+                let name = caps.name("name").expect("could not get name").as_str();
+                // Really we should ignore text inside code blocks,
+                // this is a hack to not try to treat `#[derive()]`,
+                // `[profile]`, `[test]`, or `[E\d\d\d\d]` like a link.
+                if name.starts_with("derive(") ||
+                   name.starts_with("profile") ||
+                   name.starts_with("test") ||
+                   name.starts_with("no_mangle") ||
+                   error_code.is_match(name) {
+                    return name.to_string()
+                }
+
+                let val = match caps.name("val") {
+                    // `[name](link)`
+                    Some(value) => value.as_str().to_string(),
+                    None => {
+                        match caps.name("key") {
+                            Some(key) => {
+                                match key.as_str() {
+                                    // `[name][]`
+                                    "" => format!("{}", ref_map.get(&name.to_uppercase()).expect(&format!("could not find url for the link text `{}`", name))),
+                                    // `[name][reference]`
+                                    _ => format!("{}", ref_map.get(&key.as_str().to_uppercase()).expect(&format!("could not find url for the link text `{}`", key.as_str()))),
+                                }
+                            }
+                            // `[name]` as reference
+                            None => format!("{}", ref_map.get(&name.to_uppercase()).expect(&format!("could not find url for the link text `{}`", name))),
+                        }
+                    }
+                };
+                format!("{} at *{}*", name, val)
+            }
+        }
+    });
+    output.to_string()
+}
+
+#[cfg(test)]
+mod tests {
+    fn parse(source: String) -> String {
+        super::parse_links(super::parse_references(source))
+    }
+
+    #[test]
+    fn parses_inline_link() {
+        let source =
+            r"This is a [link](http://google.com) that should be expanded"
+                .to_string();
+        let target =
+            r"This is a link at *http://google.com* that should be expanded"
+                .to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_multiline_links() {
+        let source = r"This is a [link](http://google.com) that
+should appear expanded. Another [location](/here/) and [another](http://gogogo)"
+            .to_string();
+        let target = r"This is a link at *http://google.com* that
+should appear expanded. Another location at */here/* and another at *http://gogogo*"
+            .to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_reference() {
+        let source = r"This is a [link][theref].
+[theref]: http://example.com/foo
+more text"
+            .to_string();
+        let target = r"This is a link at *http://example.com/foo*.
+more text"
+            .to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_implicit_link() {
+        let source = r"This is an [implicit][] link.
+[implicit]: /The Link/"
+            .to_string();
+        let target = r"This is an implicit at */The Link/* link.".to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn parses_refs_with_one_space_indentation() {
+        let source = r"This is a [link][ref]
+ [ref]: The link"
+            .to_string();
+        let target = r"This is a link at *The link*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_refs_with_two_space_indentation() {
+        let source = r"This is a [link][ref]
+  [ref]: The link"
+            .to_string();
+        let target = r"This is a link at *The link*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_refs_with_three_space_indentation() {
+        let source = r"This is a [link][ref]
+   [ref]: The link"
+            .to_string();
+        let target = r"This is a link at *The link*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    #[should_panic]
+    fn rejects_refs_with_four_space_indentation() {
+        let source = r"This is a [link][ref]
+    [ref]: The link"
+            .to_string();
+        let target = r"This is a link at *The link*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn ignores_optional_inline_title() {
+        let source =
+            r###"This is a titled [link](http://example.com "My title")."###
+                .to_string();
+        let target =
+            r"This is a titled link at *http://example.com*.".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_title_with_puctuation() {
+        let source =
+            r###"[link](http://example.com "It's Title")"###.to_string();
+        let target = r"link at *http://example.com*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_name_with_punctuation() {
+        let source = r###"[I'm here](there)"###.to_string();
+        let target = r###"I'm here at *there*"###.to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn parses_name_with_utf8() {
+        let source = r###"[user’s forum](the user’s forum)"###.to_string();
+        let target =
+            r###"user’s forum at *the user’s forum*"###.to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_reference_with_punctuation() {
+        let source = r###"[link][the ref-ref]
+[the ref-ref]:http://example.com/ref-ref"###
+            .to_string();
+        let target = r###"link at *http://example.com/ref-ref*"###.to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_reference_case_insensitively() {
+        let source = r"[link][Ref]
+[ref]: The reference"
+            .to_string();
+        let target = r"link at *The reference*".to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn parses_link_as_reference_when_reference_is_empty() {
+        let source = r"[link as reference][]
+[link as reference]: the actual reference"
+            .to_string();
+        let target = r"link as reference at *the actual reference*".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn parses_link_without_reference_as_reference() {
+        let source = r"[link] is alone
+[link]: The contents"
+            .to_string();
+        let target = r"link at *The contents* is alone".to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    #[ignore]
+    fn parses_link_without_reference_as_reference_with_asterisks() {
+        let source = r"*[link]* is alone
+[link]: The contents"
+            .to_string();
+        let target = r"*link* at *The contents* is alone".to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn ignores_links_in_pre_sections() {
+        let source = r###"```toml
+[package]
+name = "hello_cargo"
+version = "0.1.0"
+authors = ["Your Name <you@example.com>"]
+
+[dependencies]
+```
+"###
+        .to_string();
+        let target = source.clone();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn ignores_links_in_quoted_sections() {
+        let source = r###"do not change `[package]`."###.to_string();
+        let target = source.clone();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn ignores_links_in_quoted_sections_containing_newlines() {
+        let source = r"do not change `this [package]
+is still here` [link](ref)"
+            .to_string();
+        let target = r"do not change `this [package]
+is still here` link at *ref*"
+            .to_string();
+        assert_eq!(parse(source), target);
+    }
+
+    #[test]
+    fn ignores_links_in_pre_sections_while_still_handling_links() {
+        let source = r###"```toml
+[package]
+name = "hello_cargo"
+version = "0.1.0"
+authors = ["Your Name <you@example.com>"]
+
+[dependencies]
+```
+Another [link]
+more text
+[link]: http://gohere
+"###
+        .to_string();
+        let target = r###"```toml
+[package]
+name = "hello_cargo"
+version = "0.1.0"
+authors = ["Your Name <you@example.com>"]
+
+[dependencies]
+```
+Another link at *http://gohere*
+more text
+"###
+        .to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn ignores_quotes_in_pre_sections() {
+        let source = r###"```bash
+$ cargo build
+   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
+src/main.rs:23:21: 23:35 error: mismatched types [E0308]
+src/main.rs:23     match guess.cmp(&secret_number) {
+                                   ^~~~~~~~~~~~~~
+src/main.rs:23:21: 23:35 help: run `rustc --explain E0308` to see a detailed explanation
+src/main.rs:23:21: 23:35 note: expected type `&std::string::String`
+src/main.rs:23:21: 23:35 note:    found type `&_`
+error: aborting due to previous error
+Could not compile `guessing_game`.
+```
+"###
+            .to_string();
+        let target = source.clone();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn ignores_short_quotes() {
+        let source = r"to `1` at index `[0]` i".to_string();
+        let target = source.clone();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn ignores_pre_sections_with_final_quote() {
+        let source = r###"```bash
+$ cargo run
+   Compiling points v0.1.0 (file:///projects/points)
+error: the trait bound `Point: std::fmt::Display` is not satisfied [--explain E0277]
+ --> src/main.rs:8:29
+8 |>     println!("Point 1: {}", p1);
+  |>                             ^^
+<std macros>:2:27: 2:58: note: in this expansion of format_args!
+<std macros>:3:1: 3:54: note: in this expansion of print! (defined in <std macros>)
+src/main.rs:8:5: 8:33: note: in this expansion of println! (defined in <std macros>)
+note: `Point` cannot be formatted with the default formatter; try using `:?` instead if you are using a format string
+note: required by `std::fmt::Display::fmt`
+```
+`here` is another [link](the ref)
+"###.to_string();
+        let target = r###"```bash
+$ cargo run
+   Compiling points v0.1.0 (file:///projects/points)
+error: the trait bound `Point: std::fmt::Display` is not satisfied [--explain E0277]
+ --> src/main.rs:8:29
+8 |>     println!("Point 1: {}", p1);
+  |>                             ^^
+<std macros>:2:27: 2:58: note: in this expansion of format_args!
+<std macros>:3:1: 3:54: note: in this expansion of print! (defined in <std macros>)
+src/main.rs:8:5: 8:33: note: in this expansion of println! (defined in <std macros>)
+note: `Point` cannot be formatted with the default formatter; try using `:?` instead if you are using a format string
+note: required by `std::fmt::Display::fmt`
+```
+`here` is another link at *the ref*
+"###.to_string();
+        assert_eq!(parse(source), target);
+    }
+    #[test]
+    fn parses_adam_p_cheatsheet() {
+        let source = r###"[I'm an inline-style link](https://www.google.com)
+
+[I'm an inline-style link with title](https://www.google.com "Google's Homepage")
+
+[I'm a reference-style link][Arbitrary case-insensitive reference text]
+
+[I'm a relative reference to a repository file](../blob/master/LICENSE)
+
+[You can use numbers for reference-style link definitions][1]
+
+Or leave it empty and use the [link text itself][].
+
+URLs and URLs in angle brackets will automatically get turned into links.
+http://www.example.com or <http://www.example.com> and sometimes
+example.com (but not on Github, for example).
+
+Some text to show that the reference links can follow later.
+
+[arbitrary case-insensitive reference text]: https://www.mozilla.org
+[1]: http://slashdot.org
+[link text itself]: http://www.reddit.com"###
+            .to_string();
+
+        let target = r###"I'm an inline-style link at *https://www.google.com*
+
+I'm an inline-style link with title at *https://www.google.com*
+
+I'm a reference-style link at *https://www.mozilla.org*
+
+I'm a relative reference to a repository file at *../blob/master/LICENSE*
+
+You can use numbers for reference-style link definitions at *http://slashdot.org*
+
+Or leave it empty and use the link text itself at *http://www.reddit.com*.
+
+URLs and URLs in angle brackets will automatically get turned into links.
+http://www.example.com or <http://www.example.com> and sometimes
+example.com (but not on Github, for example).
+
+Some text to show that the reference links can follow later.
+"###
+            .to_string();
+        assert_eq!(parse(source), target);
+    }
+}

tools/src/bin/release_listings.rs

@@ -0,0 +1,159 @@
+#[macro_use]
+extern crate lazy_static;
+
+use regex::Regex;
+use std::error::Error;
+use std::fs;
+use std::fs::File;
+use std::io::prelude::*;
+use std::io::{BufReader, BufWriter};
+use std::path::{Path, PathBuf};
+
+fn main() -> Result<(), Box<dyn Error>> {
+    // Get all listings from the `listings` directory
+    let listings_dir = Path::new("listings");
+
+    // Put the results in the `tmp/listings` directory
+    let out_dir = Path::new("tmp/listings");
+
+    // Clear out any existing content in `tmp/listings`
+    if out_dir.is_dir() {
+        fs::remove_dir_all(out_dir)?;
+    }
+
+    // Create a new, empty `tmp/listings` directory
+    fs::create_dir(out_dir)?;
+
+    // For each chapter in the `listings` directory,
+    for chapter in fs::read_dir(listings_dir)? {
+        let chapter = chapter?;
+        let chapter_path = chapter.path();
+
+        let chapter_name = chapter_path
+            .file_name()
+            .expect("Chapter should've had a name");
+
+        // Create a corresponding chapter dir in `tmp/listings`
+        let output_chapter_path = out_dir.join(chapter_name);
+        fs::create_dir(&output_chapter_path)?;
+
+        // For each listing in the chapter directory,
+        for listing in fs::read_dir(chapter_path)? {
+            let listing = listing?;
+            let listing_path = listing.path();
+
+            let listing_name = listing_path
+                .file_name()
+                .expect("Listing should've had a name");
+
+            // Create a corresponding listing dir in the tmp chapter dir
+            let output_listing_dir = output_chapter_path.join(listing_name);
+            fs::create_dir(&output_listing_dir)?;
+
+            // Copy all the cleaned files in the listing to the tmp directory
+            copy_cleaned_listing_files(listing_path, output_listing_dir)?;
+        }
+    }
+
+    // Create a compressed archive of all the listings
+    let tarfile = File::create("tmp/listings.tar.gz")?;
+    let encoder =
+        flate2::write::GzEncoder::new(tarfile, flate2::Compression::default());
+    let mut archive = tar::Builder::new(encoder);
+    archive.append_dir_all("listings", "tmp/listings")?;
+
+    // Assure whoever is running this that the script exiting successfully, and remind them
+    // where the generated file ends up
+    println!("Release tarball of listings in tmp/listings.tar.gz");
+
+    Ok(())
+}
+
+// Cleaned listings will not contain:
+//
+// - `target` directories
+// - `output.txt` files used to display output in the book
+// - `rustfmt-ignore` files used to signal to update-rustc.sh the listing shouldn't be formatted
+// - anchor comments or snip comments
+// - empty `main` functions in `lib.rs` files used to trick rustdoc
+fn copy_cleaned_listing_files(
+    from: PathBuf,
+    to: PathBuf,
+) -> Result<(), Box<dyn Error>> {
+    for item in fs::read_dir(from)? {
+        let item = item?;
+        let item_path = item.path();
+
+        let item_name =
+            item_path.file_name().expect("Item should've had a name");
+        let output_item = to.join(item_name);
+
+        if item_path.is_dir() {
+            // Don't copy `target` directories
+            if item_name != "target" {
+                fs::create_dir(&output_item)?;
+                copy_cleaned_listing_files(item_path, output_item)?;
+            }
+        } else {
+            // Don't copy output files or files that tell update-rustc.sh not to format
+            if item_name != "output.txt" && item_name != "rustfmt-ignore" {
+                let item_extension = item_path.extension();
+                if item_extension.is_some() && item_extension.unwrap() == "rs" {
+                    copy_cleaned_rust_file(
+                        item_name,
+                        &item_path,
+                        &output_item,
+                    )?;
+                } else {
+                    // Copy any non-Rust files without modification
+                    fs::copy(item_path, output_item)?;
+                }
+            }
+        }
+    }
+
+    Ok(())
+}
+
+lazy_static! {
+    static ref ANCHOR_OR_SNIP_COMMENTS: Regex = Regex::new(
+        r"(?x)
+    //\s*ANCHOR:\s*[\w_-]+      # Remove all anchor comments
+    |
+    //\s*ANCHOR_END:\s*[\w_-]+  # Remove all anchor ending comments
+    |
+    //\s*--snip--               # Remove all snip comments
+    "
+    )
+    .unwrap();
+}
+
+lazy_static! {
+    static ref EMPTY_MAIN: Regex = Regex::new(r"fn main\(\) \{}").unwrap();
+}
+
+// Cleaned Rust files will not contain:
+//
+// - anchor comments or snip comments
+// - empty `main` functions in `lib.rs` files used to trick rustdoc
+fn copy_cleaned_rust_file(
+    item_name: &std::ffi::OsStr,
+    from: &PathBuf,
+    to: &PathBuf,
+) -> Result<(), Box<dyn Error>> {
+    let from_buf = BufReader::new(File::open(from)?);
+    let mut to_buf = BufWriter::new(File::create(to)?);
+
+    for line in from_buf.lines() {
+        let line = line?;
+        if !ANCHOR_OR_SNIP_COMMENTS.is_match(&line) {
+            if item_name != "lib.rs" || !EMPTY_MAIN.is_match(&line) {
+                writeln!(&mut to_buf, "{}", line)?;
+            }
+        }
+    }
+
+    to_buf.flush()?;
+
+    Ok(())
+}

tools/src/bin/remove_hidden_lines.rs

@@ -0,0 +1,83 @@
+use std::io;
+use std::io::prelude::*;
+
+fn main() {
+    write_md(remove_hidden_lines(&read_md()));
+}
+
+fn read_md() -> String {
+    let mut buffer = String::new();
+    match io::stdin().read_to_string(&mut buffer) {
+        Ok(_) => buffer,
+        Err(error) => panic!(error),
+    }
+}
+
+fn write_md(output: String) {
+    write!(io::stdout(), "{}", output).unwrap();
+}
+
+fn remove_hidden_lines(input: &str) -> String {
+    let mut resulting_lines = vec![];
+    let mut within_codeblock = false;
+
+    for line in input.lines() {
+        if line.starts_with("```") {
+            within_codeblock = !within_codeblock;
+        }
+
+        if !within_codeblock || (!line.starts_with("# ") && line != "#") {
+            resulting_lines.push(line)
+        }
+    }
+
+    resulting_lines.join("\n")
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::remove_hidden_lines;
+
+    #[test]
+    fn hidden_line_in_code_block_is_removed() {
+        let input = r#"
+In this listing:
+
+```
+fn main() {
+# secret
+}
+```
+
+you can see that...
+        "#;
+        let output = remove_hidden_lines(input);
+
+        let desired_output = r#"
+In this listing:
+
+```
+fn main() {
+}
+```
+
+you can see that...
+        "#;
+
+        assert_eq!(output, desired_output);
+    }
+
+    #[test]
+    fn headings_arent_removed() {
+        let input = r#"
+# Heading 1
+        "#;
+        let output = remove_hidden_lines(input);
+
+        let desired_output = r#"
+# Heading 1
+        "#;
+
+        assert_eq!(output, desired_output);
+    }
+}

tools/src/bin/remove_links.rs

@@ -0,0 +1,45 @@
+extern crate regex;
+
+use regex::{Captures, Regex};
+use std::collections::HashSet;
+use std::io;
+use std::io::{Read, Write};
+
+fn main() {
+    let mut buffer = String::new();
+    if let Err(e) = io::stdin().read_to_string(&mut buffer) {
+        panic!(e);
+    }
+
+    let mut refs = HashSet::new();
+
+    // Capture all links and link references.
+    let regex =
+        r"\[([^\]]+)\](?:(?:\[([^\]]+)\])|(?:\([^\)]+\)))(?i)<!--\signore\s-->";
+    let link_regex = Regex::new(regex).unwrap();
+    let first_pass = link_regex.replace_all(&buffer, |caps: &Captures<'_>| {
+        // Save the link reference we want to delete.
+        if let Some(reference) = caps.get(2) {
+            refs.insert(reference.as_str().to_string());
+        }
+
+        // Put the link title back.
+        caps.get(1).unwrap().as_str().to_string()
+    });
+
+    // Search for the references we need to delete.
+    let ref_regex = Regex::new(r"(?m)^\[([^\]]+)\]:\s.*\n").unwrap();
+    let out = ref_regex.replace_all(&first_pass, |caps: &Captures<'_>| {
+        let capture = caps.get(1).unwrap().to_owned();
+
+        // Check if we've marked this reference for deletion ...
+        if refs.contains(capture.as_str()) {
+            return "".to_string();
+        }
+
+        // ... else we put back everything we captured.
+        caps.get(0).unwrap().as_str().to_string()
+    });
+
+    write!(io::stdout(), "{}", out).unwrap();
+}

tools/src/bin/remove_markup.rs

@@ -0,0 +1,51 @@
+extern crate regex;
+
+use regex::{Captures, Regex};
+use std::io;
+use std::io::{Read, Write};
+
+fn main() {
+    write_md(remove_markup(read_md()));
+}
+
+fn read_md() -> String {
+    let mut buffer = String::new();
+    match io::stdin().read_to_string(&mut buffer) {
+        Ok(_) => buffer,
+        Err(error) => panic!(error),
+    }
+}
+
+fn write_md(output: String) {
+    write!(io::stdout(), "{}", output).unwrap();
+}
+
+fn remove_markup(input: String) -> String {
+    let filename_regex =
+        Regex::new(r#"\A<span class="filename">(.*)</span>\z"#).unwrap();
+    // Captions sometimes take up multiple lines.
+    let caption_start_regex =
+        Regex::new(r#"\A<span class="caption">(.*)\z"#).unwrap();
+    let caption_end_regex = Regex::new(r#"(.*)</span>\z"#).unwrap();
+    let regexen = vec![filename_regex, caption_start_regex, caption_end_regex];
+
+    let lines: Vec<_> = input
+        .lines()
+        .flat_map(|line| {
+            // Remove our syntax highlighting and rustdoc markers.
+            if line.starts_with("```") {
+                Some(String::from("```"))
+            // Remove the span around filenames and captions.
+            } else {
+                let result =
+                    regexen.iter().fold(line.to_string(), |result, regex| {
+                        regex.replace_all(&result, |caps: &Captures<'_>| {
+                            caps.get(1).unwrap().as_str().to_string()
+                        }).to_string()
+                    });
+                Some(result)
+            }
+        })
+        .collect();
+    lines.join("\n")
+}

tools/update-rustc.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+set -eu
+
+# Build the book before making any changes for comparison of the output.
+echo 'Building book into `tmp/book-before` before updating...'
+mdbook build -d tmp/book-before
+
+# Rustfmt all listings
+echo 'Formatting all listings...'
+find -s listings -name Cargo.toml -print0 | while IFS= read -r -d '' f; do
+    dir_to_fmt=$(dirname $f)
+
+    # There are a handful of listings we don't want to rustfmt and skipping doesn't work;
+    # those will have a file in their directory that explains why.
+    if [ ! -f "${dir_to_fmt}/rustfmt-ignore" ]; then
+        cd $dir_to_fmt
+        cargo fmt --all && true
+        cd - > /dev/null
+    fi
+done
+
+# Get listings without anchor comments in tmp by compiling a release listings artifact
+echo 'Generate listings without anchor comments...'
+cargo run --bin release_listings
+
+root_dir=$(pwd)
+
+echo 'Regenerating output...'
+# For any listings where we show the output,
+find -s listings -name output.txt -print0 | while IFS= read -r -d '' f; do
+    build_directory=$(dirname $f)
+    full_build_directory="${root_dir}/${build_directory}"
+    full_output_path="${full_build_directory}/output.txt"
+    tmp_build_directory="tmp/${build_directory}"
+
+    cd $tmp_build_directory
+
+    # Save the previous compile time; we're going to keep it to minimize diff churn
+    compile_time=$(sed -E -ne "s/.*Finished (dev|test) \[unoptimized \+ debuginfo] target\(s\) in ([0-9.]*).*/\2/p" ${full_output_path})
+
+    # Act like this is the first time this listing has been built
+    cargo clean
+
+    # Run the command in the existing output file
+    cargo_command=$(sed -ne "s/$ \(.*\)/\1/p" ${full_output_path})
+
+    # Clear the output file of everything except the command
+    echo "$ ${cargo_command}" > ${full_output_path}
+
+    # Regenerate the output and append to the output file. Turn some warnings
+    # off to reduce output noise, and use one test thread to get consistent
+    # ordering of tests in the output when the command is `cargo test`.
+    RUSTFLAGS="-A unused_variables -A dead_code" RUST_TEST_THREADS=1 $cargo_command >> ${full_output_path} 2>&1 || true
+
+    # Set the project file path to the projects directory plus the crate name instead of a path
+    # to the computer of whoever is running this
+    sed -i '' -E -e "s/(Compiling|Checking) ([^\)]*) v0.1.0 (.*)/\1 \2 v0.1.0 (file:\/\/\/projects\/\2)/" ${full_output_path}
+
+    # Restore the previous compile time, if there is one
+    if [ -n  "${compile_time}" ]; then
+        sed -i '' -E -e "s/Finished (dev|test) \[unoptimized \+ debuginfo] target\(s\) in [0-9.]*/Finished \1 [unoptimized + debuginfo] target(s) in ${compile_time}/" ${full_output_path}
+    fi
+
+    cd - > /dev/null
+done
+
+# Build the book after making all the changes
+echo 'Building book into `tmp/book-after` after updating...'
+mdbook build -d tmp/book-after
+
+# Run the megadiff script that removes all files that are the same, leaving only files to audit
+echo 'Removing tmp files that had no changes from the update...'
+./tools/megadiff.sh
+
+echo 'Done.'