Update README.md

Add Dockerfile

Dockerfile

@@ -0,0 +1,27 @@
+FROM alpine
+
+# Copy sources
+COPY . /app
+
+# Install required packages & build git-quick-stats
+RUN     apk add --no-cache bash git make ncurses util-linux \
+    &&  cd /app \
+    &&  make install \
+    &&  rm -rf /app \
+    &&  apk del --no-cache make \
+    &&  mkdir -p /usr/local/bin \
+    &&  echo -en "#!/bin/bash\nset -e\n[[ \"\${1::1}\" == '-' ]] && set -- /usr/bin/git quick-stats \"\$@\"\nexec \"\$@\"" \
+            > /usr/local/bin/docker-entrypoint \
+    &&  chmod +x /usr/local/bin/docker-entrypoint
+
+# Declare all variables usables by git-quick-stats
+ENV _GIT_SINCE= \
+    _GIT_UNTIL= \
+    _GIT_LIMIT= \
+    _GIT_PATHSPEC= \
+    _MENU_THEME=default \
+    TERM=xterm-256color
+
+WORKDIR /git
+ENTRYPOINT [ "/usr/local/bin/docker-entrypoint" ]
+CMD [ "/usr/bin/git", "quick-stats" ]

README.md

@@ -26,6 +26,7 @@
 * [**UNIX and Linux**](#unix-and-linux)
 * [**macOS**](#macos-homebrew)
 * [**Windows**](#windows)
+* [**Docker**](#docker)
 
 [**System requirements**](#system-requirements)
 
@@ -206,6 +207,14 @@ If you are installing with Cygwin, use these scripts:
 
 If you are wishing to use this with WSL, follow the UNIX and Linux instructions.
 
+### Docker
+
+You can use the Docker image provided:
+
+* Build: `docker build -t arzzen/git-quick-stats .`
+* Run interactive menu: `docker run --rm -it -v $(pwd):/git arzzen/git-quick-stats`
+* Docker pull command: `docker pull arzzen/git-quick-stats` [docker repository](https://hub.docker.com/r/arzzen/git-quick-stats)
+
 ## System requirements
 
 * An OS with a Bash shell

git-quick-stats

@@ -35,21 +35,13 @@ _theme="${_MENU_THEME:=default}"
 ################################################################################
 function checkUtils() {
     local -r msg="not found. Please make sure this is installed and in PATH."
-
-    command -v awk >/dev/null 2>&1 || { echo >&2 "awk ${msg}"; exit 1; }
-    command -v basename >/dev/null 2>&1 || { echo >&2 "basename ${msg}"; exit 1; }
-    command -v cat >/dev/null 2>&1 || { echo >&2 "cat ${msg}"; exit 1; }
-    command -v column >/dev/null 2>&1 || { echo >&2 "column ${msg}"; exit 1; }
-    command -v echo >/dev/null 2>&1 || { echo >&2 "echo ${msg}"; exit 1; }
-    command -v git >/dev/null 2>&1 || { echo >&2 "git ${msg}"; exit 1; }
-    command -v grep >/dev/null 2>&1 || { echo >&2 "grep ${msg}"; exit 1; }
-    command -v head >/dev/null 2>&1 || { echo >&2 "head ${msg}"; exit 1; }
-    command -v seq >/dev/null 2>&1 || { echo >&2 "seq ${msg}"; exit 1; }
-    command -v sort >/dev/null 2>&1 || { echo >&2 "sort ${msg}"; exit 1; }
-    command -v tput >/dev/null 2>&1 || { echo >&2 "tput ${msg}"; exit 1; }
-    command -v tr >/dev/null 2>&1 || { echo >&2 "tr ${msg}"; exit 1; }
-    command -v uniq >/dev/null 2>&1 || { echo >&2 "uniq ${msg}"; exit 1; }
-    command -v wc >/dev/null 2>&1 || { echo >&2 "wc ${msg}"; exit 1; }
+    declare -ar utils=("awk" "basename" "cat" "column" "echo" "git" "grep" "head"
+        "seq" "sort" "tput" "tr" "uniq" "wc")
+    
+    for u in "${utils[@]}"
+    do
+        command -v "$u" >/dev/null 2>&1 || { echo >&2 "$u ${msg}"; exit 1; }
+    done
 }
 
 ################################################################################