Add shared script for linkchecking books.

src/tools/linkchecker/linkcheck.sh

@@ -0,0 +1,113 @@
+#!/bin/sh
+#
+# This is a script that can be used in each book's CI to validate links using
+# the same tool as rust-lang/rust.
+#
+# This requires the rust-docs rustup component to be installed in the nightly
+# toolchain.
+#
+# Usage:
+#   ./linkcheck.sh <name-of-book>
+#
+# Options:
+#
+# -i        "Iterative" mode. The script will not clean up after it is done so
+#           you can inspect the result, and re-run more quickly.
+#
+# --all     Check all books. This can help make sure you don't break links
+#           from other books into your book.
+
+set -e
+
+if [ ! -f book.toml ] && [ ! -f src/SUMMARY.md ]
+then
+    echo "Run command in root directory of the book."
+    exit 1
+fi
+
+html_dir="$(rustc +nightly --print sysroot)/share/doc/rust/html"
+
+if [ ! -d "$html_dir" ]
+then
+    echo "HTML docs are missing from sysroot: $html_dir"
+    echo "Make sure the nightly rust-docs rustup component is installed."
+    exit 1
+fi
+
+book_name=""
+# Iterative will avoid cleaning up, so you can quickly run it repeatedly.
+iterative=0
+# If "1", test all books, else only this book.
+all_books=0
+
+while [ "$1" != "" ]
+do
+    case "$1" in
+        -i)
+            iterative=1
+            ;;
+        --all)
+            all_books=1
+            ;;
+        *)
+            if [ -n "$book_name" ]
+            then
+                echo "only one argument allowed"
+                exit 1
+            fi
+            book_name="$1"
+            ;;
+    esac
+    shift
+done
+
+if [ -z "$book_name" ]
+then
+    echo "usage: $0 <name-of-book>"
+    exit 1
+fi
+
+if [ ! -d "$html_dir/$book_name" ]
+then
+    echo "book name \"$book_name\" not found in sysroot \"$html_dir\""
+    exit 1
+fi
+
+if [ "$iterative" = "0" ]
+then
+    echo "Cleaning old directories..."
+    rm -rf linkcheck linkchecker
+fi
+
+if [ ! -e "linkchecker/main.rs" ] || [ "$iterative" = "0" ]
+then
+    echo "Downloading linkchecker source..."
+    mkdir linkchecker
+    curl -o linkchecker/Cargo.toml \
+        https://raw.githubusercontent.com/rust-lang/rust/master/src/tools/linkchecker/Cargo.toml
+    curl -o linkchecker/main.rs \
+        https://raw.githubusercontent.com/rust-lang/rust/master/src/tools/linkchecker/main.rs
+fi
+
+echo "Building book \"$book_name\"..."
+mdbook build
+
+cp -R "$html_dir" linkcheck
+rm -rf "linkcheck/$book_name"
+cp -R book "linkcheck/$book_name"
+
+if [ "$all_books" = "1" ]
+then
+    check_path="linkcheck"
+else
+    check_path="linkcheck/$book_name"
+fi
+echo "Running linkchecker on \"$check_path\"..."
+cargo run --manifest-path=linkchecker/Cargo.toml -- "$check_path"
+
+if [ "$iterative" = "0" ]
+then
+    rm -rf linkcheck linkchecker
+fi
+
+echo "Link check completed successfully!"