silent multiversion installer

bin/main.sh

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+#!/bin/bash
+
+echo "Hello World!"
+
+echo "This is ${0}."
+
+echo "A.K.A. $(readlink -f ${0})."
+
+echo "Arguments are:"
+
+for an_arg in "${@}" ; do
+   echo "- ${an_arg}"
+done

kiwi

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+#!/bin/bash
+
+#############
+# CONSTANTS #
+############# 
+
+# base config filename (constant)
+KIWI_CONF_NAME="kiwi.conf"
+# base install dir 
+KIWI_BASEDIR="${HOME}/.cache/kiwi-config-bin"
+# repository uri
+KIWI_REPO="https://github.com/ldericher/kiwi-config"
+
+########
+# MAIN #
+########
+
+# use latest version by default
+version="master"
+
+# check if pwd is a kiwi folder
+if [ -f "./${KIWI_CONF_NAME}" ]; then
+    # determine needed kiwi-config version
+    version=$(source "./${KIWI_CONF_NAME}" && echo "v${VERSION}")
+fi
+
+# install if kiwi-config not found
+if [ ! -x "${KIWI_BASEDIR}/${version}/main.sh" ]; then
+    echo -n "Installing kiwi-config ${version} into ${KIWI_BASEDIR} ... "
+
+    ### production version ###
+
+    # # create temp dir
+    # tmpdir=$(mktemp -d)
+
+    # ( 
+    #     cd "${tmpdir}"
+
+    #     # download archive
+    #     wget "${KIWI_REPO}/archive/${version}.zip"
+    #     unzip "${version}.zip"
+
+    #     # read archive version tag
+    #     cd "kiwi-config-${version}"
+    #     version=$(cat ./version-tag)
+
+    #     # install archive
+    #     mkdir -p "${KIWI_BASEDIR}"
+    #     mv ./bin "${KIWI_BASEDIR}/${version}"
+    # )
+
+    # # discard temp dir
+    # rm -rf "${tmpdir}"
+
+    ### development version ###
+
+    ( 
+        # read this version tag
+        version=$(cat ./version-tag)
+
+        # install this
+        mkdir -p "${KIWI_BASEDIR}"
+        ln -s "$(readlink -f ./bin)" "${KIWI_BASEDIR}/${version}"
+    )
+
+    echo "OK"
+fi
+
+# run main script
+exec "${KIWI_BASEDIR}/${version}/main.sh" "${@}"

kiwi.conf

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+VERSION="0.1"

version-tag

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+v0.1