Added installer for testing. Updated Readme.

Author: clivewalkden

README.md

@@ -2,6 +2,10 @@
 
 A script to copy over a production database to a staging server.
 
+## Installation
+To install or update the script run the following curl script
+```curl -o- https://raw.githubusercontent.com/clivewalkden/bash-magento2-db-sync/feature/add-installer/install.sh | bash```
+
 You can save a configuration file in the Magento directory to save answering some of the questions.
 
 ```bash

install.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+
+{ # this ensures the entire script is downloaded #
+
+dbsync_install_dir() {
+    printf %s "${HOME}/.dbsync"
+}
+
+dbsync_latest_version() {
+  echo "v1.0.0"
+}
+
+#
+# Outputs the location to DB Sync depending on:
+# * The availability of $GIT_SOURCE
+# * The method used ("script" or "git" in the script, defaults to "git")
+#
+dbsync_source() {
+  local DBSYNC_METHOD
+  DBSYNC_METHOD="$1"
+  local DBSYNC_SOURCE_URL
+  DBSYNC_SOURCE_URL="https://github.com/clivewalkden/bash-magento2-db-sync.git"
+  echo "$DBSYNC_SOURCE_URL"
+}
+
+do_install() {
+    local INSTALL_DIR
+    INSTALL_DIR="$(dbsync_install_dir)"
+
+    # Downloading to $INSTALL_DIR
+    mkdir -p "$INSTALL_DIR"
+    if [ -f "$INSTALL_DIR/db-sync.sh" ]; then
+        echo "=> db-sync is already installed in $INSTALL_DIR, trying to update the script"
+    else
+        echo "=> Downloading db-sync as script to '$INSTALL_DIR'"
+    fi
+
+    if [ -d "$INSTALL_DIR/.git" ]; then
+        echo "=> db-sync is already installed in $INSTALL_DIR, trying to update using git"
+        command printf '\r=> '
+        command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" fetch origin tag "$(dbsync_latest_version)" --depth=1 2> /dev/null || {
+        echo >&2 "Failed to update db-sync, run 'git fetch' in $INSTALL_DIR yourself."
+        exit 1
+        }
+    else
+        # Cloning to $INSTALL_DIR
+        echo "=> Downloading db0sync from git to '$INSTALL_DIR'"
+        command printf '\r=> '
+        mkdir -p "${INSTALL_DIR}"
+        if [ "$(ls -A "${INSTALL_DIR}")" ]; then
+        command git init "${INSTALL_DIR}" || {
+            echo >&2 'Failed to initialize db-sync repo. Please report this!'
+            exit 2
+        }
+        command git --git-dir="${INSTALL_DIR}/.git" remote add origin "$(dbsync_source)" 2> /dev/null \
+            || command git --git-dir="${INSTALL_DIR}/.git" remote set-url origin "$(dbsync_source)" || {
+            echo >&2 'Failed to add remote "origin" (or set the URL). Please report this!'
+            exit 2
+        }
+        command git --git-dir="${INSTALL_DIR}/.git" fetch origin tag "$(dbsync_latest_version)" --depth=1 || {
+            echo >&2 'Failed to fetch origin with tags. Please report this!'
+            exit 2
+        }
+        else
+        command git -c advice.detachedHead=false clone "$(dbsync_source)" -b "$(dbsync_latest_version)" --depth=1 "${INSTALL_DIR}" || {
+            echo >&2 'Failed to clone dbsync repo. Please report this!'
+            exit 2
+        }
+        fi
+    fi
+    command git -c advice.detachedHead=false --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" checkout -f --quiet "$(dbsync_latest_version)"
+    if [ -n "$(command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" show-ref refs/heads/master)" ]; then
+        if command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch --quiet 2>/dev/null; then
+        command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch --quiet -D master >/dev/null 2>&1
+        else
+        echo >&2 "Your version of git is out of date. Please update it!"
+        command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch -D master >/dev/null 2>&1
+        fi
+    fi
+
+    echo "=> Compressing and cleaning up git repository"
+    if ! command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" reflog expire --expire=now --all; then
+        echo >&2 "Your version of git is out of date. Please update it!"
+    fi
+    if ! command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" gc --auto --aggressive --prune=now ; then
+        echo >&2 "Your version of git is out of date. Please update it!"
+    fi
+    return
+}
+
+do_install
+
+} # this ensures the entire script is downloaded #