Data commit

Task/Simple-database/UNIX-Shell/simple-database-1.sh

@@ -0,0 +1,96 @@
+#!/bin/sh
+
+db_create() {
+	mkdir ./"$1" && mkdir "./$1/.tag" && echo "Create DB \`$1'"
+}
+
+db_delete() {
+	rm -r ./"$1" && echo "Delete DB \`$1'"
+}
+
+db_show() {
+	if [ -z "$2" ]; then show_help; fi
+	for x in "./$1/$2/"*; do
+		echo "$x:" | sed "s/.*\///"
+		cat "$x" | sed "s/^/    /"
+		echo
+	done
+
+	printf "Tags: "
+	ls "./$1/$2/.tag"
+}
+
+db_tag() {
+	local db="$1" item="$2"
+	shift
+	shift
+	for tag in $@; do
+		mkdir "./$db/.tag/$tag"
+		ln -s "$PWD/$db/$item" "./$db/.tag/$tag/"
+		touch "./$db/$item/.tag/$tag"
+	done
+}
+
+show_help() {
+	echo "Usage: $0 command [args]"
+	echo "Commands:"
+	cat $0 | grep ") ##" | grep -v grep | sed 's/) ## /:\t/'
+	exit
+}
+
+if [ -z "$1" ]; then show_help; fi
+
+action=$1 it=database
+shift
+case $action in
+	create) ## db -- create $it
+		db_create "$@" ;;
+
+	drop) ## db -- delete $it
+		db_delete "$@" ;;
+
+	add) ## db item -- add new item to $it
+		mkdir -p "./$1/$2/.tag" && touch "./$1/$2/Description" ;;
+
+	rem) ## db item -- delete item from $it
+		rm -r "./$1/$2"
+		rm "./$1/.tag/"*"/$2"
+		;;
+
+	show) ## db item -- show item
+		db_show "$@" ;;
+
+	newtag) ## db new-tag-name -- create new tag name
+		mkdir "./$1/.tag/$2" ;;
+
+	prop) ## db item property-name property-content -- add property to item
+		echo "$4" > "./$1/$2/$3" ;;
+
+	tag) ## db item tag [more-tags...] -- mark item with tags
+		db_tag "$@" ;;
+
+	last) ## db -- show latest item
+		ls "$1" --sort=time | tail -n 1
+		;;
+
+	list) ## db -- list all items
+		ls "$1" -1 --sort=time
+		;;
+
+	last-all) ## db -- list items in each category
+		for x in "$1/.tag/"*; do
+			echo "$x" | sed 's/.*\//Tag: /'
+			printf "    "
+			ls "$x" --sort=time | tail -n 1
+			echo
+		done
+		;;
+
+	help) ## this message
+		show_help
+		;;
+
+	*)	echo Bad DB command: $1
+		show_help
+		;;
+esac

Task/Simple-database/UNIX-Shell/simple-database-2.sh

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+$ sdb create CDs
+Create DB `CDs'
+$ sdb add CDs Bookends
+$ sdb prop CDs Bookends artists "Simon & Garfunkel"
+$ sdb add CDs "Ode to joy"
+$ sdb prop CDs "Ode to joy" artist "Beethoven"
+$ sdb tag CDs Bookends rock folk  # I'm not sure about this
+$ sdb tag CDs "Ode to joy" classical
+$ sdb show CDs Bookends
+Description:
+
+artists:
+    Simon & Garfunkel
+
+Tags: folk  rock
+$ sdb prop CDs "Ode to joy" Description "Sym. No. 9"
+$ sdb show CDs "Ode to joy"
+Description:
+    Sym. No. 9
+
+artist:
+    Beethoven
+
+Tags: classical
+$ sdb last-all CDs
+Tag: classical
+    Ode to joy
+
+Tag: folk
+    Bookends
+
+Tag: rock
+    Bookends
+
+$ sdb drop CDs
+Delete DB `CDs'
+$