add logging

.gitignore

@@ -1,2 +1,3 @@
 *.swp
 *.csv
+log

clean

@@ -1,2 +1,3 @@
 #!/bin/sh
+rm -rf log
 rm -f *.csv

update

@@ -3,13 +3,7 @@
 # Settings
 CSV_URL="https://www8.cao.go.jp/chosei/shukujitsu/syukujitsu.csv"
 
-# Internal configuration settings
-LOCK_DIR="lock"
-
-TMP_CSV_FILE="holidays-jp-tmp.csv"
-RAW_CSV_FILE="holidays-jp-raw.csv"
-CSV_FILE="holidays-jp.csv"
-
+# Constants
 EXIT_SUCCESS=0
 EXIT_FAILURE=1
 
@@ -23,18 +17,44 @@ if ! command -v nkf >/dev/null; then
   exit $EXIT_FAILURE
 fi
 
+# Logging
+CURRENT_MONTH=$(date "+%Yw%U%z")
+SCRIPT_NAME=$(basename $0)
+LOG_DIR="log"
+LOG_FILE="$LOG_DIR/$SCRIPT_NAME_$CURRENT_MONTH"
+
+get_current_time() {
+  date "+%Y-%m-%d %H:%M:%S%z"
+}
+
+log() {
+  local timestamp=$(get_current_time)
+  local message=$1
+  echo "$timestamp $message" >>$LOG_FILE
+}
+
 # Acquire the lock or exit
+LOCK_DIR="lock"
 if ! mkdir "$LOCK_DIR" 2>/dev/null; then
   echo "Another process is holding the lock. Exiting."
   exit $EXIT_FAILURE
 fi
 
+mkdir -p $LOG_DIR
+
+# Internal configuration settings
+TMP_CSV_FILE="holidays-jp-tmp.csv"
+RAW_CSV_FILE="holidays-jp-raw.csv"
+CSV_FILE="holidays-jp.csv"
+
 # Run
 curl -sS -L -o $TMP_CSV_FILE $CSV_URL
 if ! diff -q $RAW_CSV_FILE $TMP_CSV_FILE >/dev/null 2>&1; then
   mv $TMP_CSV_FILE $RAW_CSV_FILE
   nkf -w $RAW_CSV_FILE >$CSV_FILE
+  log "Changed"
 else
+  log "No Change"
   rm $TMP_CSV_FILE
 fi