From e89379b44595489a3220b498466de60f4b3e4f26 Mon Sep 17 00:00:00 2001
From: John Grib <johngrib82@gmail.com>
Date: Sat, 30 Nov 2019 09:42:16 +0900
Subject: [PATCH 1/2] Add backup command using git

---
 bin/droller | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/bin/droller b/bin/droller
index 9434c10..37ed139 100755
--- a/bin/droller
+++ b/bin/droller
@@ -14,7 +14,9 @@ HEAD="$DIRECTORY/head"
 ## [edit | e]   # Edit the index file           # Example: droller edit
 ## [<uri>]      # Add a record to the index file       # Example: droller http://www...
 ## [delete | d] # Delete a record from the index file  # Example: droller d
-## [help | h]   # Help                                 # Example: droller h
+## [backup | b] # Back up your index file.      # Example: droller backup
+## [log | l]    # Show backup logs.             # Example: droller l
+## [help | h]   # Help                          # Example: droller h
 
 main() {
     createFiles
@@ -49,6 +51,10 @@ main() {
             selectRandomRecord
             checkStatus
             ;;
+        "backup"|"b")
+            backup;;
+        "log"|"l")
+            gitLog;;
         "help"|"h")
             showHelp;;
         *)
@@ -142,5 +148,35 @@ showHelp() {
     egrep '## \[' $BASH_SOURCE | column -ts'#'
 }
 
+backup() {
+    git --version 2> /dev/null
+    if [ "$?" -ne "0" ]; then
+        printf "Backup requires git. Please install git.\nBackup has been canceled.\n"
+        return 1
+    fi
+    gitInit
+    gitCommit
+    gitLog | head
+}
+
+gitInit() {
+    if [ ! -d "$DIRECTORY/.git" ]; then
+        mkdir -p $DIRECTORY
+        git init $DIRECTORY
+    fi
+}
+
+gitCommit() {
+    linkCount=`wc -l $INDEX | sed 's/^ *\([0-9]*\).*/\1/'`
+    totalPoint=`awk '{ total+= $2 } END { print total }' $INDEX`
+    git -C $DIRECTORY add $INDEX
+    git -C $DIRECTORY commit --allow-empty \
+        -m "`printf "links: %s / total point: %s" $linkCount $totalPoint`"
+}
+
+gitLog() {
+    git -C $DIRECTORY log --color --graph --pretty=format:'%Cred%h%Creset - %s %Cgreen(%ci)' --abbrev-commit
+}
+
 main $@
 

From e4937fbc99e66c760b67fdfe48a5c21e3b807a31 Mon Sep 17 00:00:00 2001
From: John Grib <johngrib82@gmail.com>
Date: Sat, 30 Nov 2019 09:51:53 +0900
Subject: [PATCH 2/2] Check if the index file should be backup

---
 bin/droller | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/bin/droller b/bin/droller
index 37ed139..538d02e 100755
--- a/bin/droller
+++ b/bin/droller
@@ -154,9 +154,18 @@ backup() {
         printf "Backup requires git. Please install git.\nBackup has been canceled.\n"
         return 1
     fi
+    if [ `isNeedBackup` == "0" ]; then
+        echo "There are no changes. You do not need to back up."
+        gitLog
+        return 0
+    fi
     gitInit
     gitCommit
-    gitLog | head
+    gitLog
+}
+
+isNeedBackup() {
+    git -C $DIRECTORY status --short | grep -v '??' | wc -l | tr -d ' '
 }
 
 gitInit() {