update caddy installer with latest functions

caddy/install.bash

@@ -11,47 +11,55 @@
 set -e
 set -u
 
-#################
-# Install caddy #
-#################
+pkg_cmd_name="caddy"
+pkg_common_opt="$HOME/.local"
 
-new_caddy="${HOME}/.local/bin/caddy"
+# just a junk file so that the version check always fails for non-current versions
+pkg_new_opt="$HOME/.local/opt/caddy-doesntexist111"
 
-# Test for existing version
-set +e
-cur_caddy="$(command -v caddy)"
-set -e
-if [ -n "$cur_caddy" ]; then
-  cur_ver=$(caddy version | head -n 1 | cut -d ' ' -f 2)
-  if [ "$cur_ver" == "$WEBI_VERSION" ]; then
-    echo "caddy v$WEBI_VERSION already installed at $cur_caddy"
-    exit 0
-  elif [ "$cur_caddy" != "$new_caddy" ]; then
-    echo "WARN: possible conflict with caddy v$WEBI_VERSION at $cur_caddy"
-  fi
-fi
+pkg_get_current_version() {
+    # 'caddy version' has output in this format:
+    #       v2.1.0 h1:pQSaIJGFluFvu8KDGDODV8u4/QRED/OPyIR+MWYYse8=
+    # This trims it down to just the version number:
+    #       2.0.0
+    echo "$(caddy version 2>/dev/null | head -n 1 | cut -d ' ' -f1 | sed 's:^v::')"
+}
 
-# Note: this file is `source`d by the true installer and hence will have the webi functions
+pkg_format_cmd_version() {
+    # 'node v12.8.0' is the canonical version format for node
+    my_version="$1"
+    echo "$pkg_cmd_name v$my_version"
+}
 
-# because we created releases.js we can use webi_download()
-# downloads caddy to ~/Downloads
-webi_download
+pkg_link_new_version() {
+    # caddy is just a single file, no directory linking to do
+}
 
-# because this is tar or zip, we can webi_extract()
-# extracts to the WEBI_TMP directory, raw (no --strip-prefix)
-webi_extract
+pkg_pre_install() {
+    # if selected version is installed, quit
+    webi_check
+    # will save to ~/Downloads/$WEBI_PKG_FILE by default
+    webi_download
+    # supported formats (.xz, .tar.*, .zip) will be extracted to $WEBI_TMP
+    webi_extract
+}
 
-pushd "$WEBI_TMP" 2>&1 >/dev/null
-        echo Installing caddy v${WEBI_VERSION} as "$new_caddy"
-        mv ./caddy "$HOME/.local/bin/"
-popd 2>&1 >/dev/null
+pkg_install() {
+    pushd "$WEBI_TMP" 2>&1 >/dev/null
 
-###################
-#   Update PATH   #
-###################
+        # rename the entire extracted folder to the new location
+        # (this will be "$HOME/.local/opt/node-v$WEBI_VERSION" by default)
+        mkdir -p "$pkg_common_bin"
+        mv ./"$pkg_cmd_name"* "$pkg_common_cmd"
 
-# TODO get better output from pathman / output the path to add as return to webi bootstrap
-webi_path_add "$HOME/.local/bin"
+    popd 2>&1 >/dev/null
+}
 
-echo "Installed 'caddy'"
-echo ""
+pkg_post_install() {
+    # just in case we add something in the future
+    pkg_link_new_version
+
+    # web_path_add is defined in webi/template.bash at https://github.com/webinstall/packages
+    # Adds "$HOME/.local/opt/node" to PATH
+    webi_path_add "$pkg_common_bin"
+}