From 951035e49ceadb1aa1a3f27115aa2577e760adfb Mon Sep 17 00:00:00 2001
From: Terts Diepraam <terts.diepraam@gmail.com>
Date: Thu, 20 Jan 2022 15:00:16 +0100
Subject: [PATCH] mdbook docs

---
 Cargo.toml                 |   4 ++
 docs/docs/.gitignore       |   1 +
 docs/docs/book.toml        |   6 ++
 docs/docs/src/SUMMARY.md   |   3 +
 docs/docs/src/chapter_1.md |   1 +
 src/bin/uudoc.rs           | 114 +++++++++++++++++++++++++++++++++++++
 6 files changed, 129 insertions(+)
 create mode 100644 docs/docs/.gitignore
 create mode 100644 docs/docs/book.toml
 create mode 100644 docs/docs/src/SUMMARY.md
 create mode 100644 docs/docs/src/chapter_1.md
 create mode 100644 src/bin/uudoc.rs

diff --git a/Cargo.toml b/Cargo.toml
index a099115a6..cbb91bf32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -389,3 +389,7 @@ unix_socket = "0.5.0"
 [[bin]]
 name = "coreutils"
 path = "src/bin/coreutils.rs"
+
+[[bin]]
+name = "uudoc"
+path = "src/bin/uudoc.rs"
diff --git a/docs/docs/.gitignore b/docs/docs/.gitignore
new file mode 100644
index 000000000..7585238ef
--- /dev/null
+++ b/docs/docs/.gitignore
@@ -0,0 +1 @@
+book
diff --git a/docs/docs/book.toml b/docs/docs/book.toml
new file mode 100644
index 000000000..fe32ddf98
--- /dev/null
+++ b/docs/docs/book.toml
@@ -0,0 +1,6 @@
+[book]
+authors = ["Terts Diepraam"]
+language = "en"
+multilingual = false
+src = "src"
+title = "Uutils Documentation"
diff --git a/docs/docs/src/SUMMARY.md b/docs/docs/src/SUMMARY.md
new file mode 100644
index 000000000..7390c8289
--- /dev/null
+++ b/docs/docs/src/SUMMARY.md
@@ -0,0 +1,3 @@
+# Summary
+
+- [Chapter 1](./chapter_1.md)
diff --git a/docs/docs/src/chapter_1.md b/docs/docs/src/chapter_1.md
new file mode 100644
index 000000000..b743fda35
--- /dev/null
+++ b/docs/docs/src/chapter_1.md
@@ -0,0 +1 @@
+# Chapter 1
diff --git a/src/bin/uudoc.rs b/src/bin/uudoc.rs
new file mode 100644
index 000000000..65da4c7cc
--- /dev/null
+++ b/src/bin/uudoc.rs
@@ -0,0 +1,114 @@
+// This file is part of the uutils coreutils package.
+//
+// (c) Michael Gehring <mg@ebfe.org>
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use clap::App;
+use clap::Arg;
+use clap::Shell;
+use std::cmp;
+use std::collections::hash_map::HashMap;
+use std::ffi::OsStr;
+use std::ffi::OsString;
+use std::io::{self, Write};
+use std::path::{Path, PathBuf};
+use std::process;
+use uucore::display::Quotable;
+
+const VERSION: &str = env!("CARGO_PKG_VERSION");
+
+include!(concat!(env!("OUT_DIR"), "/uutils_map.rs"));
+
+fn usage<T>(utils: &UtilityMap<T>, name: &str) {
+    println!("{} {}\n", name, VERSION);
+    println!("Generate markdown documentation for uutils");
+    println!("Usage: {} [util]\n", name);
+    println!("Currently defined functions:\n");
+    #[allow(clippy::map_clone)]
+    let mut utils: Vec<&str> = utils.keys().map(|&s| s).collect();
+    utils.sort_unstable();
+    let display_list = utils.join(", ");
+    let width = cmp::min(textwrap::termwidth(), 100) - 4 * 2; // (opinion/heuristic) max 100 chars wide with 4 character side indentions
+    println!(
+        "{}",
+        textwrap::indent(&textwrap::fill(&display_list, width), "    ")
+    );
+}
+
+fn binary_path(args: &mut impl Iterator<Item = OsString>) -> PathBuf {
+    match args.next() {
+        Some(ref s) if !s.is_empty() => PathBuf::from(s),
+        _ => std::env::current_exe().unwrap(),
+    }
+}
+
+fn name(binary_path: &Path) -> &str {
+    binary_path.file_stem().unwrap().to_str().unwrap()
+}
+
+fn main() {
+    uucore::panic::mute_sigpipe_panic();
+
+    let utils = util_map();
+    let mut args = uucore::args_os();
+
+    let binary = binary_path(&mut args);
+    let binary_as_util = name(&binary);
+
+    // binary name equals util name?
+    if let Some(&(uumain, _)) = utils.get(binary_as_util) {
+        process::exit(uumain((vec![binary.into()].into_iter()).chain(args)));
+    }
+
+    // binary name equals prefixed util name?
+    // * prefix/stem may be any string ending in a non-alphanumeric character
+    let util_name = if let Some(util) = utils.keys().find(|util| {
+        binary_as_util.ends_with(*util)
+            && !(&binary_as_util[..binary_as_util.len() - (*util).len()])
+                .ends_with(char::is_alphanumeric)
+    }) {
+        // prefixed util => replace 0th (aka, executable name) argument
+        Some(OsString::from(*util))
+    } else {
+        // unmatched binary name => regard as multi-binary container and advance argument list
+        uucore::set_utility_is_second_arg();
+        args.next()
+    };
+
+    // 0th argument equals util name?
+    if let Some(util_os) = util_name {
+        fn not_found(util: &OsStr) -> ! {
+            println!("{}: function/utility not found", util.maybe_quote());
+            process::exit(1);
+        }
+
+        let util = match util_os.to_str() {
+            Some(util) => util,
+            None => not_found(&util_os),
+        };
+
+        match utils.get(util) {
+            Some(&(uumain, app)) => {
+                print_markdown(app);
+            }
+            None => {
+                if util == "--help" || util == "-h" {
+                    usage(&utils, binary_as_util);
+                    process::exit(0);
+                } else {
+                    not_found(&util_os);
+                }
+            }
+        }
+    } else {
+        // no arguments provided
+        usage(&utils, binary_as_util);
+        process::exit(0);
+    }
+}
+
+fn print_markdown(app: &App) {
+    for arg in app.get_arguments() {}
+}