feat: ✨ add auto updater

Signed-off-by: Eric Villard <[email protected]>

install.sh

@@ -4,6 +4,7 @@
 #
 
 VERSION="0.2.0"
+REMOTE_INSTALLER="https://raw.githubusercontent.com/eviweb/config-installer/main/install.sh"
 
 main_dir()
 {
@@ -199,6 +200,37 @@ initialize()
     mkdir -p "$(main_dir)"/config/{copy,link,run}
 }
 
+get_latest_version()
+{
+    curl -Ls "${REMOTE_INSTALLER}" | grep -Poe '\d+\.\d+\.\d+'
+}
+
+should_update()
+{
+    local compareversions=( "${VERSION}" $@ )
+
+    test "$(echo "${compareversions[@]}" | tr " " "\n" | sort -rV | head -n 1)" != "${VERSION}";
+}
+
+check_for_update()
+{
+    local latestversion="$(get_latest_version)"
+    local answer=""
+
+    if should_update "${latestversion}"; then
+        while ! [[ "${answer}" =~ ^[YyNn] ]]; do
+            read -p "A new version is available, do you want to update? (y/n)" answer
+        done
+
+        [[ "${answer}" =~ ^[Nn] ]] || {
+            log "Start updating..."
+            curl -Ls "${REMOTE_INSTALLER}" -o "$(main_dir)"/install.sh
+            log "Done, please restart the installer."
+            exit 0
+        }
+    fi
+}
+
 if ! is_sourced; then
     VERBOSITY=0
     OVERWRITING="-i"
@@ -220,6 +252,8 @@ if ! is_sourced; then
         esac
     done
 
+    check_for_update
+
     before_scripts=(
         $(find_scripts "before")
     )

tests/update-test.sh

@@ -0,0 +1,63 @@
+. "$(main_dir)"/install.sh
+
+tempdir="$(mktemp -d)"
+
+[ -d "${tempdir}" ] || {
+    echo -e "Failed to create ${tempdir}"
+    exit 1
+}
+
+major="${VERSION%%.*}"
+minor="$(echo "${VERSION}" | grep -Poe '(?<=\.)\d+(?=\.)')"
+patch="${VERSION##*.}"
+
+declare -A versions=(
+    [0.1.0]=1
+    ["${VERSION}"]=1
+    ["${major}.${minor}.$((patch+1))"]=0
+    ["${major}.$((minor+1)).${patch}"]=0
+    ["$((major+1)).${minor}.${patch}"]=0
+)
+
+curl()
+{
+    cat "$(main_dir)"/install.sh
+}
+
+alter_version()
+{
+    local file="$1"
+    local version="$2"
+
+    sed -r "s/VERSION=\"[^\"]+\"/VERSION=\"${version}\"/" -i "${file}"
+}
+
+## test get_latest_version
+assert_equals "$(get_latest_version)" "$(cat "$(main_dir)"/install.sh | grep -Poe '\d+\.\d+\.\d+')"
+
+## test should_update
+for version in "${!versions[@]}"; do
+    message="Should update because ${version} is greater than ${VERSION}."
+    [ "${versions["${version}"]}" -eq 0 ] || message="Should not update because ${version} is lesser than ${VERSION}."
+
+    should_update "${version}"
+    result="$?"
+
+    assert_equals "${result}" "${versions["${version}"]}" "${message}"
+done
+
+## test update
+OLD_VERSION="0.1.0"
+cp "$(main_dir)"/install.sh "${tempdir}"
+alter_version "${tempdir}"/install.sh "${OLD_VERSION}"
+
+## no update
+assert_equals "${OLD_VERSION}" "$(echo 'n' | "${tempdir}"/install.sh -V | grep -Poe '\d+\.\d+\.\d+')"
+
+## do update
+unset curl
+echo 'y' | "${tempdir}"/install.sh
+
+assert_equals "${VERSION}" "$("${tempdir}"/install.sh -V | grep -Poe '\d+\.\d+\.\d+')"
+
+rm -rf "${tempdir}"