add example dir

_example/install.bash

@@ -0,0 +1,78 @@
+#!/bin/bash
+
+set -e
+set -u
+
+###################
+# Install foobar #
+###################
+
+common_opt="${HOME}/.local/opt/foobar-v${WEBI_VERSION}"
+new_opt="${HOME}/.local/opt/foobar-v${WEBI_VERSION}"
+new_bin="${HOME}/.local/opt/foobar-v${WEBI_VERSION}/bin/foobar"
+
+update_installed() {
+    rm -rf "$common_opt"
+    ln -s "$new_opt" "$common_opt"
+
+    # TODO get better output from pathman / output the path to add as return to webi bootstrap
+    webi_path_add "$common_opt/bin"
+    webi_path_add "$HOME/foobar/bin"
+}
+
+if [ -x "$new_opt/bin/foobar" ]; then
+  update_installed
+  exit 0
+fi
+
+# Test for existing version
+set +e
+cur_go="$(command -v foobar)"
+set -e
+if [ -n "$cur_go" ]; then
+  cur_ver=$(foobar version | cut -d' ' -f3 | sed 's:foobar::')
+  if [ "$cur_ver" == "$(echo $WEBI_VERSION | sed 's:\.0::g')" ]; then
+    echo "foobar v$WEBI_VERSION already installed at $cur_go"
+    exit 0
+  elif [ "$cur_go" != "$new_bin" ]; then
+    echo "WARN: possible conflict with foobar v$WEBI_VERSION at $cur_go"
+  fi
+fi
+
+
+# Note: this file is `source`d by the true installer and hence will have the webi functions
+
+# because we created releases.js we can use webi_download()
+# downloads foobar to ~/Downloads
+webi_download
+
+# because this is tar or zip, we can webi_extract()
+# extracts to the WEBI_TMP directory, raw (no --strip-prefix)
+webi_extract
+
+pushd "$WEBI_TMP" 2>&1 >/dev/null
+    echo Installing foobar v${WEBI_VERSION} as "$new_bin"
+
+    # simpler for single-binary commands
+    #mv ./example*/bin/example "$HOME/.local/bin"
+
+    # best for packages and toolchains
+    rm -rf "$new_opt"
+    if [ -n "$(command -v rsync 2>/dev/null | grep rsync)" ]; then
+      rsync -Krl ./foobar*/ "$new_opt/" 2>/dev/null
+    else
+      cp -Hr ./foobar*/* "$new_opt/" 2>/dev/null
+      cp -Hr ./foobar*/.* "$new_opt/" 2>/dev/null
+    fi
+    rm -rf ./foobar*
+
+popd 2>&1 >/dev/null
+
+###################
+#   Update PATH   #
+###################
+
+update_installed
+
+echo "Installed 'foobar'"
+echo ""