+#!/bin/bash
+
+{
+
+set -e
+set -u
+#set -x
+
+#WEBI_PKG=
+#WEBI_NAME=
+# TODO should this be BASEURL instead?
+#WEBI_HOST=
+#WEBI_RELEASES=
+#WEBI_CSV=
+#WEBI_TAG=
+#WEBI_VERSION=
+#WEBI_MAJOR=
+#WEBI_MINOR=
+#WEBI_PATCH=
+# TODO not sure if BUILD is the best name for this
+#WEBI_BUILD=
+#WEBI_LTS=
+#WEBI_CHANNEL=
+#WEBI_EXT=
+#WEBI_PKG_URL=
+#WEBI_PKG_FILE=
+WEBI_UA="$(uname -a)"
+export WEBI_HOST
+
+##
+## Set up tmp, download, and install directories
+##
+
+WEBI_TMP=${WEBI_TMP:-"$(mktemp -d -t webinstall-${WEBI_PKG:-}.XXXXXXXX)"}
+
+mkdir -p "$HOME/Downloads"
+mkdir -p "$HOME/.local/bin"
+mkdir -p "$HOME/.local/opt"
+
+##
+## Detect http client
+##
+set +e
+export WEBI_CURL="$(command -v curl)"
+export WEBI_WGET="$(command -v wget)"
+set -e
+
+my_versioned_name=""
+_webi_canonical_name() {
+ if [ -n "$my_versioned_name" ]; then
+ echo "$my_versioned_name"
+ return 0
+ fi
+
+ if [ -n "$(command -v pkg_format_cmd_version)" ]; then
+ my_versioned_name="$(pkg_format_cmd_version "$WEBI_VERSION")"
+ else
+ my_versioned_name="'$pkg_cmd_name' v$WEBI_VERSION"
+ fi
+
+ echo "$my_versioned_name"
+}
+
+webi_link() {
+ if [ -n "$(command -v pkg_link)" ]; then
+ pkg_link
+ return 0
+ fi
+
+ if [ -n "$WEBI_SINGLE" ] || [ "single" == "${1:-}" ]; then
+ if [ -d "$pkg_dst_cmd" ]; then
+ rm -rf -i "$pkg_dst_cmd"
+ else
+ rm -f "$pkg_dst_cmd"
+ fi
+ ln -s "$pkg_src_cmd" "$pkg_dst_cmd"
+ else
+ # 'pkg_dst' will default to $HOME/.local/opt/node
+ # 'pkg_src' will be the installed version, such as to $HOME/.local/opt/node-v12.8.0
+ if [ -d "$pkg_dst" ]; then
+ rm -rf -i "$pkg_dst"
+ else
+ rm -f "$pkg_dst"
+ fi
+ ln -s "$pkg_src" "$pkg_dst"
+ fi
+}
+
+webi_check() {
+ # Test for existing version
+ set +e
+ my_current_cmd="$(command -v "$pkg_cmd_name")"
+ set -e
+ if [ -n "$my_current_cmd" ]; then
+ pkg_current_version="$(pkg_get_current_version 2>/dev/null | head -n 1)"
+ # remove trailing '.0's for golang's sake
+ my_current_version="$(echo $pkg_current_version | sed 's:\.0::g')"
+ my_src_version="$(echo $WEBI_VERSION | sed 's:\.0::g')"
+ my_canonical_name="$(_webi_canonical_name)"
+ if [ "$my_src_version" == "$my_current_version" ]; then
+ echo "$my_canonical_name already installed at $my_current_cmd"
+ exit 0
+ else
+ if [ "$my_current_cmd" != "$pkg_dst_cmd" ]; then
+ echo "WARN: possible conflict between $my_canonical_name and $pkg_current_version at $my_current_cmd"
+ fi
+ if [ -x "$pkg_src_cmd" ]; then
+ webi_link
+ echo "switched to $my_canonical_name at $pkg_src"
+ exit 0
+ fi
+ fi
+ fi
+}
+
+webi_download() {
+ if [ -n "${1:-}" ]; then
+ my_url="$1"
+ else
+ if [ "error" == "$WEBI_CHANNEL" ]; then
+ # TODO pass back requested OS / Arch / Version
+ echo "Error: no '$WEBI_NAME' release found for the given OS and architecture by that tag or version"
+ echo " (check that the package name and version are correct)"
+ exit 1
+ fi
+ my_url="$WEBI_PKG_URL"
+ fi
+ if [ -n "${2:-}" ]; then
+ my_dl="$2"
+ else
+ my_dl="$HOME/Downloads/$WEBI_PKG_FILE"
+ fi
+
+ if [ -e "$my_dl" ]; then
+ echo "Found $my_dl"
+ return 0
+ fi
+
+ echo "Downloading $WEBI_NAME to $my_dl"
+
+ # It's only 2020, we can't expect to have reliable CLI tools
+ # to tell us the size of a file as part of a base system...
+ if [ -n "$WEBI_WGET" ]; then
+ # wget has resumable downloads
+ # TODO wget -c --content-disposition "$my_url"
+ set +e
+ wget -q --show-progress --user-agent="wget $WEBI_UA" -c "$my_url" -O "$my_dl.part"
+ if ! [ $? -eq 0 ]; then
+ echo "failed to download from $WEBI_PKG_URL"
+ exit 1
+ fi
+ set -e
+ else
+ # Neither GNU nor BSD curl have sane resume download options, hence we don't bother
+ # TODO curl -fsSL --remote-name --remote-header-name --write-out "$my_url"
+ curl -fSL -H "User-Agent: curl $WEBI_UA" "$my_url" -o "$my_dl.part"
+ fi
+
+ mv "$my_dl.part" "$my_dl"
+}
+
+webi_extract() {
+ pushd "$WEBI_TMP" 2>&1 >/dev/null
+ if [ "tar" == "$WEBI_EXT" ]; then
+ echo "Extracting $HOME/Downloads/$WEBI_PKG_FILE"
+ tar xf "$HOME/Downloads/$WEBI_PKG_FILE"
+ elif [ "zip" == "$WEBI_EXT" ]; then
+ echo "Extracting $HOME/Downloads/$WEBI_PKG_FILE"
+ unzip "$HOME/Downloads/$WEBI_PKG_FILE"
+ elif [ "exe" == "$WEBI_EXT" ]; then
+ # do nothing (but don't leave an empty if block either)
+ echo -n ""
+ elif [ "xz" == "$WEBI_EXT" ]; then
+ echo "Inflating $HOME/Downloads/$WEBI_PKG_FILE"
+ unxz -c "$HOME/Downloads/$WEBI_PKG_FILE" > $(basename "$WEBI_PKG_FILE")
+ else
+ # do nothing
+ echo "Failed to extract $HOME/Downloads/$WEBI_PKG_FILE"
+ exit 1
+ fi
+ popd 2>&1 >/dev/null
+}
+
+webi_path_add() {
+ # make sure that we don't recursively install pathman with webi
+ my_path="$PATH"
+ export PATH="$HOME/.local/bin:$PATH"
+ set +e
+ my_pathman=$(command -v pathman)
+ set -e
+ export PATH="$my_path"
+
+ # install pathman if not already installed
+ if [ -z "$my_pathman" ]; then
+ "$HOME/.local/bin/webi" pathman
+ export PATH="$HOME/.local/bin:$PATH"
+ fi
+
+ # in case pathman was recently installed and the PATH not updated
+ "$HOME/.local/bin/pathman" add "$1"
+}
+
+webi_pre_install() {
+ webi_check
+ webi_download
+ webi_extract
+}
+
+webi_install() {
+ if [ -n "$WEBI_SINGLE" ] || [ "single" == "${1:-}" ]; then
+ mkdir -p "$(dirname $pkg_src_cmd)"
+ mv ./"$pkg_cmd_name"* "$pkg_src_cmd"
+ chmod a+x "$pkg_src_cmd"
+ else
+ mkdir -p "$(dirname $pkg_src)"
+ if [ -d "$pkg_src" ]; then
+ rm -rf -i "$pkg_src"
+ else
+ rm -f "$pkg_src"
+ fi
+ mv ./"$pkg_cmd_name"* "$pkg_src"
+ fi
+}
+
+webi_post_install() {
+ webi_path_add "$pkg_dst_bin"
+}
+
+_webi_done_message() {
+ echo "Installed $(_webi_canonical_name) as $pkg_dst_cmd"
+}
+
+##
+##
+## BEGIN user-submited script
+##
+##
+
+WEBI_SINGLE=
+
+{
+
+{{ installer }}
+
+}
+
+##
+##
+## END user-submitted script
+##
+##
+
+if [ -n "$(command -v pkg_get_current_version)" ]; then
+ pkg_cmd_name="${pkg_cmd_name:-$WEBI_NAME}"
+
+ if [ -n "$WEBI_SINGLE" ]; then
+ pkg_dst_cmd="${pkg_dst_cmd:-$HOME/.local/bin/$pkg_cmd_name}"
+ pkg_dst_bin="$(dirname $pkg_dst_cmd)"
+ pkg_dst="$(dirname $pkg_dst_bin)"
+
+ pkg_src_cmd="${pkg_src_cmd:-$HOME/.local/xbin/$pkg_cmd_name-$WEBI_VERSION}"
+ pkg_src_bin="$(dirname $pkg_src_cmd)"
+ pkg_src="$(dirname $pkg_src_bin)"
+ else
+ pkg_dst="${pkg_dst:-$HOME/.local/opt/$pkg_cmd_name}"
+ pkg_dst_bin="${pkg_dst_bin:-$pkg_dst/bin}"
+ pkg_dst_cmd="${pkg_dst_cmd:-$pkg_dst_bin/$pkg_cmd_name}"
+
+ pkg_src="${pkg_src:-$HOME/.local/opt/$pkg_cmd_name-v$WEBI_VERSION}"
+ pkg_src_bin="${pkg_src_bin:-$pkg_src/bin}"
+ pkg_src_cmd="${pkg_src_cmd:-$pkg_src_bin/$pkg_cmd_name}"
+ fi
+
+ [ -n "$(command -v pkg_pre_install)" ] && pkg_pre_install || webi_pre_install
+
+ pushd "$WEBI_TMP" 2>&1 >/dev/null
+ echo "Installing to $pkg_src_cmd"
+ [ -n "$(command -v pkg_install)" ] && pkg_install || webi_install
+ popd 2>&1 >/dev/null
+
+ webi_link
+
+ pushd "$WEBI_TMP" 2>&1 >/dev/null
+ [ -n "$(command -v pkg_post_install)" ] && pkg_post_install || webi_post_install
+ popd 2>&1 >/dev/null
+
+ pushd "$WEBI_TMP" 2>&1 >/dev/null
+ [ -n "$(command -v pkg_done_message)" ] && pkg_done_message || _webi_done_message
+ popd 2>&1 >/dev/null
+
+ echo ""
+fi
+
+rm -rf "$WEBI_TMP"
+
+}