#!/bin/sh
# shellcheck disable=2034 disable=2059
set -eu

MSG_USAGE_EN='Usage:
  @NAME@ -i -o DIRECTORY REPOSITORY...
  @NAME@    -o DIRECTORY -u CLONE_URL REPOSITORY
  @NAME@ [-hV]
'

MSG_HELP_EN='Options:
  -i             build the index page of the repositories
  -u CLONE_URL   address to be shown alongside "git clone"
  -o DIRECTORY   output where to place the generated files
  -h, --help     show this help
  -V, --version  print the version information

See "man @NAME@" for more information.'

MSG_MISSING_CLIARG_EN='Missing %s\n'
MSG_INCOMPATIBLE_OPTIONS_EN='Incompatible options -u and -i'
MSG_MISSING_ARGS_EN='Missing [PATH | [PATHS]]'
MSG_LANGNAME_EN='en'
MSG_INDEX_DESCRIPTION_EN='Index of repositories'
MSG_DEFAULT_TITLE_EN='Repositories'
MSG_LOGO_ALT_INDEX_EN='Logo image of the repository list'
MSG_LOGO_ALT_REPOSITORY_EN='Logo image of the repository'
MSG_NAME_EN='Name'
MSG_DESCRIPTION_EN='Description'
MSG_LAST_COMMIT_EN='Last commit'
MSG_FOOTER_TEMPLATE_EN='Generated with <a href="https://euandreh.xyz/@NAME@/">@NAME@</a>.'
MSG_COMMIT_FEED_EN='commit feed'
MSG_TAGS_FEED_EN='tags feed'
MSG_NAV_FILES_EN='files'
MSG_NAV_LOG_EN='log'
MSG_NAV_REFS_EN='refs'
MSG_THEAD_BRANCH_EN='Branch'
MSG_THEAD_COMMITMSG_EN='Commit message'
MSG_THEAD_AUTHOR_EN='Author'
MSG_THEAD_DATE_EN='Date'
MSG_THEAD_TAG_EN='Tag'
MSG_TITLE_REFS_EN='refs'

set_lang() {
	lang="$1"
	eval "
	MSG_USAGE=\$MSG_USAGE_$lang
	MSG_HELP=\$MSG_HELP_$lang
	MSG_MISSING_CLIARG=\$MSG_MISSING_CLIARG_$lang
	MSG_INCOMPATIBLE_OPTIONS=\$MSG_INCOMPATIBLE_OPTIONS_$lang
	MSG_MISSING_ARGS=\$MSG_MISSING_ARGS_$lang
	MSG_LANGNAME=\$MSG_LANGNAME_$lang
	MSG_INDEX_DESCRIPTION=\$MSG_INDEX_DESCRIPTION_$lang
	MSG_DEFAULT_TITLE=\$MSG_DEFAULT_TITLE_$lang
	MSG_LOGO_ALT_INDEX=\$MSG_LOGO_ALT_INDEX_$lang
	MSG_LOGO_ALT_REPOSITORY=\$MSG_LOGO_ALT_REPOSITORY_$lang
	MSG_NAME=\$MSG_NAME_$lang
	MSG_DESCRIPTION=\$MSG_DESCRIPTION_$lang
	MSG_LAST_COMMIT=\$MSG_LAST_COMMIT_$lang
	MSG_FOOTER_TEMPLATE=\$MSG_FOOTER_TEMPLATE_$lang
	MSG_COMMIT_FEED=\$MSG_COMMIT_FEED_$lang
	MSG_TAGS_FEED=\$MSG_TAGS_FEED_$lang
	MSG_NAV_FILES=\$MSG_NAV_FILES_$lang
	MSG_NAV_LOG=\$MSG_NAV_LOG_$lang
	MSG_NAV_REFS=\$MSG_NAV_REFS_$lang
	MSG_THEAD_BRANCH=\$MSG_THEAD_BRANCH_$lang
	MSG_THEAD_COMMITMSG=\$MSG_THEAD_COMMITMSG_$lang
	MSG_THEAD_AUTHOR=\$MSG_THEAD_AUTHOR_$lang
	MSG_THEAD_DATE=\$MSG_THEAD_DATE_$lang
	MSG_THEAD_TAG=\$MSG_THEAD_TAG_$lang
	MSG_TITLE_REFS=\$MSG_TITLE_REFS_$lang
"
}

get_lang() {
	# LC_MESSAGES="ll_CC.CODESET@modifier" -> ll_CC, where quotes
	# are optional
	locale 2>/dev/null |
		grep LC_MESSAGES |
		cut -d.  -f1     |
		cut -d\" -f2     |
		cut -d=  -f2
}

case "$(get_lang)" in
	*)
		set_lang EN
		;;
esac


#
# Utilities
#

escape() {
	echo "$1" |
		sed -e 's|&|\&amp;|g;s|<|\&lt;|g;s|>|\&gt;|g;s|"|\&quot;|g' \
		    -e "s|'|\&#39|g"
}

realpath() {
	mkdir -p "$1"
	cd "$1"
	pwd
}


#
# Documentation functions
#

usage() {
	printf '%s\n' "$MSG_USAGE"
}

help() {
	printf '%s\n' "$MSG_HELP"
}

version() {
	printf '@NAME@-@VERSION@ @DATE@\n'
}


#
# Template strings
#

print_logo() {
	cat <<EOF
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16">
  <path d="M 0  8  L 1  8  L 1  9  L 0  9  L 0  8  Z" />
  <path d="M 0  13 L 1  13 L 1  14 L 0  14 L 0  13 Z" />
  <path d="M 1  8  L 2  8  L 2  9  L 1  9  L 1  8  Z" />
  <path d="M 1  13 L 2  13 L 2  14 L 1  14 L 1  13 Z" />
  <path d="M 2  8  L 3  8  L 3  9  L 2  9  L 2  8  Z" />
  <path d="M 2  13 L 3  13 L 3  14 L 2  14 L 2  13 Z" />
  <path d="M 3  8  L 4  8  L 4  9  L 3  9  L 3  8  Z" />
  <path d="M 3  13 L 4  13 L 4  14 L 3  14 L 3  13 Z" />
  <path d="M 4  7  L 5  7  L 5  8  L 4  8  L 4  7  Z" />
  <path d="M 4  8  L 5  8  L 5  9  L 4  9  L 4  8  Z" />
  <path d="M 4  13 L 5  13 L 5  14 L 4  14 L 4  13 Z" />
  <path d="M 5  6  L 6  6  L 6  7  L 5  7  L 5  6  Z" />
  <path d="M 5  7  L 6  7  L 6  8  L 5  8  L 5  7  Z" />
  <path d="M 5  13 L 6  13 L 6  14 L 5  14 L 5  13 Z" />
  <path d="M 6  5  L 7  5  L 7  6  L 6  6  L 6  5  Z" />
  <path d="M 6  6  L 7  6  L 7  7  L 6  7  L 6  6  Z" />
  <path d="M 6  14 L 7  14 L 7  15 L 6  15 L 6  14 Z" />
  <path d="M 7  1  L 8  1  L 8  2  L 7  2  L 7  1  Z" />
  <path d="M 7  14 L 8  14 L 8  15 L 7  15 L 7  14 Z" />
  <path d="M 7  15 L 8  15 L 8  16 L 7  16 L 7  15 Z" />
  <path d="M 7  2  L 8  2  L 8  3  L 7  3  L 7  2  Z" />
  <path d="M 7  3  L 8  3  L 8  4  L 7  4  L 7  3  Z" />
  <path d="M 7  4  L 8  4  L 8  5  L 7  5  L 7  4  Z" />
  <path d="M 7  5  L 8  5  L 8  6  L 7  6  L 7  5  Z" />
  <path d="M 8  1  L 9  1  L 9  2  L 8  2  L 8  1  Z" />
  <path d="M 8  15 L 9  15 L 9  16 L 8  16 L 8  15 Z" />
  <path d="M 9  1  L 10 1  L 10 2  L 9  2  L 9  1  Z" />
  <path d="M 9  2  L 10 2  L 10 3  L 9  3  L 9  2  Z" />
  <path d="M 9  6  L 10 6  L 10 7  L 9  7  L 9  6  Z" />
  <path d="M 9  15 L 10 15 L 10 16 L 9  16 L 9  15 Z" />
  <path d="M 10 2  L 11 2  L 11 3  L 10 3  L 10 2  Z" />
  <path d="M 10 3  L 11 3  L 11 4  L 10 4  L 10 3  Z" />
  <path d="M 10 4  L 11 4  L 11 5  L 10 5  L 10 4  Z" />
  <path d="M 10 5  L 11 5  L 11 6  L 10 6  L 10 5  Z" />
  <path d="M 10 6  L 11 6  L 11 7  L 10 7  L 10 6  Z" />
  <path d="M 11 6  L 12 6  L 12 7  L 11 7  L 11 6  Z" />
  <path d="M 11 8  L 12 8  L 12 9  L 11 9  L 11 8  Z" />
  <path d="M 10 15 L 11 15 L 11 16 L 10 16 L 10 15 Z" />
  <path d="M 11 10 L 12 10 L 12 11 L 11 11 L 11 10 Z" />
  <path d="M 11 12 L 12 12 L 12 13 L 11 13 L 11 12 Z" />
  <path d="M 11 14 L 12 14 L 12 15 L 11 15 L 11 14 Z" />
  <path d="M 11 15 L 12 15 L 12 16 L 11 16 L 11 15 Z" />
  <path d="M 12 6  L 13 6  L 13 7  L 12 7  L 12 6  Z" />
  <path d="M 12 8  L 13 8  L 13 9  L 12 9  L 12 8  Z" />
  <path d="M 12 10 L 13 10 L 13 11 L 12 11 L 12 10 Z" />
  <path d="M 12 12 L 13 12 L 13 13 L 12 13 L 12 12 Z" />
  <path d="M 12 14 L 13 14 L 13 15 L 12 15 L 12 14 Z" />
  <path d="M 13 6  L 14 6  L 14 7  L 13 7  L 13 6  Z" />
  <path d="M 13 8  L 14 8  L 14 9  L 13 9  L 13 8  Z" />
  <path d="M 13 10 L 14 10 L 14 11 L 13 11 L 13 10 Z" />
  <path d="M 13 12 L 14 12 L 14 13 L 13 13 L 13 12 Z" />
  <path d="M 13 13 L 14 13 L 14 14 L 13 14 L 13 13 Z" />
  <path d="M 13 14 L 14 14 L 14 15 L 13 15 L 13 14 Z" />
  <path d="M 14 7  L 15 7  L 15 8  L 14 8  L 14 7  Z" />
  <path d="M 14 8  L 15 8  L 15 9  L 14 9  L 14 8  Z" />
  <path d="M 14 9  L 15 9  L 15 10 L 14 10 L 14 9  Z" />
  <path d="M 14 10 L 15 10 L 15 11 L 14 11 L 14 10 Z" />
  <path d="M 14 11 L 15 11 L 15 12 L 14 12 L 14 11 Z" />
  <path d="M 14 12 L 15 12 L 15 13 L 14 13 L 14 12 Z" />
</svg>
EOF
}

print_style() {
	cat <<EOF
:root {
  --color: black;
  --background-color: white;
  --hover-color: hsl(0, 0%, 93%);
  --nav-color: hsl(0, 0%, 87%);
}

@media(prefers-color-scheme: dark) {
  :root {
    --color: white;
    --background-color: black;
    --hover-color: hsl(0, 0%, 7%);
    --nav-color: hsl(0, 0%, 13%);
  }

  body {
    color: var(--color);
    background-color: var(--background-color);
  }

  a {
    color: hsl(211, 100%, 60%);
  }

  a:visited {
    color: hsl(242, 100%, 80%);
  }
}

body {
  font-family: monospace;
  max-width: 1100px;
  margin: 0 auto 0 auto;
}

.logo {
  height: 6em;
  width: 6em;
}

.header-horizontal-grouping {
  display: flex;
  align-items: center;
  margin-top: 1em;
  margin-bottom: 1em;
}

.header-description {
  margin-left: 2em;
}

nav {
  margin-top: 2em;
}

nav ul {
  display: flex;
  list-style-type: none;
  margin-bottom: 0;
}

nav li {
  margin-left: 10px;
}

nav a, nav a:visited {
  padding: 2px 8px 0px 8px;
  color: var(--color);
}

.selected-nav-item {
  background-color: var(--nav-color);
}

hr {
  margin-top: 0;
  border: 0;
  border-top: 3px solid var(--nav-color);
}

table {
  margin: 2em auto;
}

th {
  padding-bottom: 1em;
}

tbody tr:hover {
  background-color: var(--hover-color);
}

td {
  padding-left: 1em;
  padding-right: 1em;
}

footer {
  text-align: center;
}
EOF
}

print_index_header() {
	cat <<EOF
<!DOCTYPE html>
<html lang="$(escape "$MSG_LANGNAME")">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport"    content="width=device-width, initial-scale=1" />
    <meta name="description" content="$(escape "$MSG_INDEX_DESCRIPTION")" />
    <link rel="icon"       type="image/svg+xml" href="logo.svg" />
    <link rel="stylesheet" type="text/css"      href="style.css" />
    <title>$(escape "$TITLE")"</title>
  </head>
  <body>
    <header>
      <div class="header-horizontal-grouping">
	<img alt="$(escape "$MSG_LOGO_ALT_INDEX")" src="logo.svg" />
	<h1 class="header-description">
	  $(escape "$TITLE")
	</h1>
      </div>
      <hr />
    </header>
    <main>
      <table>
	<thead>
	  <tr>
	    <th>
	      $(escape "$MSG_NAME")
	    </th>
	    <th>
	      $(escape "$MSG_DESCRIPTION")
	    </th>
	    <th>
	      $(escape "$MSG_LAST_COMMIT")
	    </th>
	  </tr>
	</thead>
	<tbody>
EOF
}

print_index_row() {
	repo="$(basename "$(realpath "${1%.git}")")"
	description="$(cat "$1/description" 2>/dev/null ||:)"
	last_commit_date="$(git -C "$1" log -1 --format=%cd --date='format:%Y-%m:%d %H:%M' 2>/dev/null ||:)"
	cat <<EOF
	  <tr>
	    <td>
	      <a href="$(escape "$repo")">
		$(escape "$repo")
	      </a>
	    </td>
	    <td>
	      $(escape "$description")
	    </td>
	    <td>
	      $(escape "$last_commit_date")
	    </td>
	  </tr>
EOF
}

print_index_footer() {
	cat <<EOF
	</tbody>
      </table>
    </main>
    <footer>
      <hr />
      <p>
	$(escape "$MSG_FOOTER_TEMPLATE")
      </p>
    </footer>
  </body>
</html>
EOF
}

index_write() {
	rm -f "$OUTDIR/index.html"
	print_index_header >> "$OUTDIR/index.html"
	for r in "$@"; do
		print_index_row "$r" >> "$OUTDIR/index.html"
	done
	print_index_footer >> "$OUTDIR/index.html"

	print_logo > "$OUTDIR/logo.svg"
	print_style > "$OUTDIR/style.css"
}

print_repo_refs() {
	repo="$1"
	description="$2"
	cat <<EOF
<!DOCTYPE html>
<html lang="$(escape "$MSG_LANGNAME")">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport"    content="width=device-width, initial-scale=1" />
    <meta name="description" content="$(escape "$description")" />
    <link rel="icon"       type="image/svg+xml"        href="logo.svg" />
    <link rel="stylesheet" type="text/css"             href="style.css" />
    <link rel="alternate"  type="application/atom+xml" href="commits.xml" title="$(escape "$repo") - $(escape "$MSG_COMMIT_FEED")" hreflang="$(escape "$MSG_LANGNAME")" />
    <link rel="alternate"  type="application/atom+xml" href="tags.xml"    title="$(escape "$repo") - $(escape "$MSG_TAGS_FEED")"   hreflang="$(escape "$MSG_LANGNAME")" />
    <title>$(escape "$repo") - $(escape "$MSG_TITLE_REFS")</title>
  </head>
  <body>
    <header>
      <div class="header-horizontal-grouping">
	<a href="../">
	  <img alt="$(escape "$MSG_LOGO_ALT_REPOSITORY")" class="logo" src="logo.svg" />
	</a>
	<div class="header-description">
	  <h1>
	    <a href="./">
	      $(escape "$repo")
	    </a>
	  </h1>
	  <h2>
	    $(escape "$description")
	  </h2>
	  <code>
	    git clone $(escape "$CLONE_URL")
	  </code>
	</div>
      </div>
      <nav>
	<ul>
	  <li>
	    <a href="files.html">
	      $(escape "$MSG_NAV_FILES")
	    </a>
	  </li>
	  <li>
	    <a href="log.html">
	      $(escape "$MSG_NAV_LOG")
	    </a>
	  </li>
	  <li class="selected-nav-item">
	    <a href="refs.html">
	      $(escape "$MSG_NAV_REFS")
	    </a>
	  </li>
	</ul>
      </nav>
      <hr />
    </header>
    <main>
      <table>
	<thead>
	  <tr>
	    <th>
	      $(escape "$MSG_THEAD_BRANCH")
	    </th>
	    <th>
	      $(escape "$MSG_THEAD_COMMITMSG")
	    </th>
	    <th>
	      $(escape "$MSG_THEAD_AUTHOR")
	    </th>
	    <th>
	      $(escape "$MSG_THEAD_DATE")
	    </th>
	  </tr>
	</thead>
	<tbody>
EOF

	for branch in $(git branch --format '%(refname:lstrip=2)'); do
		sha="$(git rev-parse "$branch")"
		cat <<EOF
          <tr>
	    <td>
	      <a href="log/$(escape "$branch").html">
		$(escape "$branch")
	      </a>
	    </td>
	    <td>
	      <a href="commit/$(escape "$sha").html">
		$(escape "$(git log -1 --format=%B "$sha")")
	      </a>
	    </td>
	    <td>
	      $(escape "$(git log -1 --format=%an "$sha")")
	    </td>
	    <td>
	      $(escape "$(git log -1 --format=%cd --date='format:%Y-%m:%d %H:%M' "$sha")")
	    </td>
	  </tr>
EOF
	done

	cat <<EOF
        </tbody>
      </table>
      <table>
	<thead>
	  <tr>
	    <th>
	      $(escape "$MSG_THEAD_TAG")
	    </th>
	    <th>
	      $(escape "$MSG_THEAD_AUTHOR")
	    </th>
	    <th>
	      $(escape "$MSG_THEAD_DATE")
	    </th>
	  </tr>
	</thead>
	<tbody>
EOF

	for tag in $(git tag | sed '1!G;h;$!d'); do
		if [ -e "$CACHE_DIR/tarballs/$repo-$tag.tar.gz.asc" ]; then
			tarball_link="(<a href=\"tarballs/$(escape "$repo")-$(escape "$tag").tar.gz\">tarball</a>,
	       <a href=\"tarballs/$(escape "$repo")-$(escape "$tag").tar.gz.asc\">sig</a>)"
		else
			tarball_link="(<a href=\"tarballs/$(escape "$repo")-$(escape "$tag").tar.gz\">tarball</a>)"
		fi
		cat <<EOF
          <tr>
	    <td>
	      <a href="tag/$(escape "$tag").html">
                $(escape "$tag")
	      </a>
	      $tarball_link
	    </td>
	    <td>
	      $(escape "$(git log -1 --format=%an "$tag")")
	    </td>
	    <td>
	      $(escape "$(git log -1 --format=%cd --date='format:%Y-%m:%d %H:%M' "$tag")")
	    </td>
	  </tr>
EOF
	done

	cat <<EOF
        </tbody>
      </table>
    </main>
    <footer>
      <hr />
      <p>
	$(escape "$MSG_FOOTER_TEMPLATE")
      </p>
    </footer>
  </body>
</html>
EOF
}

print_formatted_diff() {
	sha="$1"
	printf '<pre>'
	git show -p "$sha"
	printf '</pre>\n'
}

print_repo_commit_page() {
	sha="$2"
	summary="$(git log -1 --format=%B "$sha")"
	cat <<EOF
<!DOCTYPE html>
<html lang="$(escape "$MSG_LANGNAME")">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport"    content="width=device-width, initial-scale=1" />
    <meta name="description" content="$(escape "$description")" />
    <link rel="icon"       type="image/svg+xml"        href="../logo.svg" />
    <link rel="stylesheet" type="text/css"             href="../style.css" />
    <link rel="alternate"  type="application/atom+xml" href="../commits.xml" title="$(escape "$repo") - $(escape "$MSG_COMMIT_FEED")" hreflang="$(escape "$MSG_LANGNAME")" />
    <link rel="alternate"  type="application/atom+xml" href="../tags.xml"    title="$(escape "$repo") - $(escape "$MSG_TAGS_FEED")"   hreflang="$(escape "$MSG_LANGNAME")" />
    <title>$(escape "$repo")@$(escape "$sha") - $(escape "$summary")</title>
  </head>
  <body>
    <header>
      <div class="header-horizontal-grouping">
	<a href="../../">
	  <img alt="$(escape "$MSG_LOGO_ALT_REPOSITORY")" class="logo" src="../logo.svg" />
	</a>
	<div class="header-description">
	  <h1>
	    <a href="../">
	      $(escape "$repo")
	    </a>
	  </h1>
	  <h2>
	    $(escape "$description")
	  </h2>
	  <code>
	    git clone $(escape "$CLONE_URL")
	  </code>
	</div>
      </div>
      <nav>
	<ul>
	  <li>
	    <a href="files.html">
	      $(escape "$MSG_NAV_FILES")
	    </a>
	  </li>
	  <li>
	    <a href="log.html">
	      $(escape "$MSG_NAV_LOG")
	    </a>
	  </li>
	  <li>
	    <a href="refs.html">
	      $(escape "$MSG_NAV_REFS")
	    </a>
	  </li>
	</ul>
      </nav>
      <hr />
    </header>
    <main>
$(print_formatted_diff "$sha")
    </main>
    <footer>
      <hr />
      <p>
	$(escape "$MSG_FOOTER_TEMPLATE")
      </p>
    </footer>
  </body>
</html>
EOF
}


cached_run() {
	TARGET_PATH="$1"
	shift # drop $TARGET_PATH
	shift # drop --

	if [ -e "$OUTDIR/$TARGET_PATH" ]; then
		echo "$OUTDIR/$TARGET_PATH"
		return
	fi
	if [ ! -e "$CACHE_DIR/$TARGET_PATH" ]; then
		"$@"
	fi
	cp "$CACHE_DIR/$TARGET_PATH" "$OUTDIR/$TARGET_PATH"
}

repo_tarballs_write() {
	repo="$1"
	mkdir -p "$OUTDIR/tarballs" "$CACHE_DIR/tarballs"
	for branch in $(git branch --format '%(refname:lstrip=2)'); do
		git archive  --prefix "$repo-$branch/" "$branch" \
			-o "$OUTDIR/tarballs/$repo-$branch.tar.xz"
	done

	for tag in $(git tag); do
		TARBALL_PATH="tarballs/$repo-$tag.tar.gz"
		cached_run "$TARBALL_PATH" -- \
			git archive  --prefix "$repo-$tag/" "$tag" \
				-o "$CACHE_DIR/$TARBALL_PATH"

		SIGNATURE_PATH="tarballs/$repo-$tag.tar.gz.asc"
		if git notes --ref=refs/notes/signatures/tar.gz show "$tag" \
				1>/dev/null 2>&1; then
			git notes --ref=refs/notes/signatures/tar.gz show "$tag" \
				> "$OUTDIR/$SIGNATURE_PATH"
		fi
	done
}

repo_commits_write() {
	mkdir -p "$OUTDIR/commit" "$CACHE_DIR/commit"
	for branch in $(git branch --format '%(refname:lstrip=2)'); do
		for commit in $(git rev-list "$branch"); do
			COMMIT_PATH="commit/$commit.html"
			if [ -e "$OUTDIR/$COMMIT_PATH" ]; then
				# Assume all previous history exists, too
				break
			fi
			if [ ! -e "CACHE_DIR/$COMMIT_PATH" ]; then
				print_repo_commit_page "$repo" "$commit" \
					> "$CACHE_DIR/$COMMIT_PATH"
			fi
			cp "$CACHE_DIR/$COMMIT_PATH" "$OUTDIR/$COMMIT_PATH"

			# FIXME: WIP
			return
		done
	done
}

repo_write() {
	cd "$1"
	repo="$(basename "$(realpath "${1%.git}")")"
	description="$(cat "$1/description" 2>/dev/null ||:)"
	CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/gistatic/$repo"

	repo_tarballs_write "$repo"
	print_repo_refs "$repo" "$description" > "$OUTDIR/refs.html"

	repo_commits_write "$repo"

	print_logo > "$OUTDIR/logo.svg"
	print_style > "$OUTDIR/style.css"
	cd - > /dev/null
}


for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		--version)
			version
			exit
			;;
		*)
			;;
	esac
done

INDEX=false
TITLE="$MSG_DEFAULT_TITLE"
OUTDIR=
CLONE_URL=
CACHE_DIR=
while getopts 'o:t:u:ihV' flag; do
	case "$flag" in
		i)
			INDEX=true
			;;
		t)
			TITLE="$OPTARG"
			;;
		o)
			OUTDIR="$(realpath "$OPTARG")"
			;;
		u)
			CLONE_URL="$OPTARG"
			;;
		h)
			usage
			help
			exit
			;;
		V)
			version
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

assert_arg() {
	if [ -z "$1" ]; then
		printf "$MSG_MISSING_CLIARG" "$2" >&2
		exit 2
	fi
}

assert_arg "$OUTDIR" '-o DIRECTORY'

if [ "$INDEX" = false ]; then
	assert_arg "$CLONE_URL" '-u CLONE_URL'
elif [ -n "$CLONE_URL" ]; then
	printf '%s\n' "$MSG_INCOMPATIBLE_OPTIONS" >&2
	exit 2
fi

if [ -z "${1:-}" ]; then
	printf '%s\n' "$MSG_MISSING_ARGS" >&2
	exit 2
fi

mkdir -p "$OUTDIR"

if [ "$INDEX" = true ]; then
	index_write "$@"
else
	repo_write "$1"
fi