Squashed commit of the following:

commit ac9da4ef336ed4a7d65196261b5ef35132c2fa5c
Author: Ingolf Wagner <contact@ingolf-wagner.de>
Date:   Mon Jun 19 22:14:28 2017 +0200

    update README

commit 3ae146424a
Author: Ingolf Wagner <contact@ingolf-wagner.de>
Date:   Mon Jun 19 22:04:52 2017 +0200

    add man page

commit 68d49fda1c
Author: Ingolf Wagner <contact@ingolf-wagner.de>
Date:   Thu Jun 15 23:18:34 2017 +0200

    add can read from input now #4

README.md

@@ -1,11 +1,14 @@
 # memo
 
-A simple memo tool written in bash.
+A simple tool written in bash to memorize stuff.
 
-Memo are organized in topic which are folders in `~/memo`
+Memo organizes is structured through topics which are folders in `~/memo`.
 
-You can copy file to you topic and you can search across all your
-topics.
+## Features
+
+* add text to a topic to memorize it
+* search for strings in your memo-database
+* copy/import files to topic folder.
 
 ## Run
 
@@ -22,10 +25,8 @@ topics.
 
 ## Configuration
 
-to change the folder where the memo files are kept just add
+to change the folder where memo kept its files just add
 
     export MEMO_DIR=/path/to/memo/folder
 
 in your `~/.bashrc`.
-
-

doc/memo.1

@@ -0,0 +1,86 @@
+.\" Text automatically generated by txt2man
+.TH memo 1 "19 June 2017" "doc" "Linux Reference Manual"
+.SH NAME
+\fBmemo
+\fB
+.SH SYNOPSIS
+.nf
+.fam C
+\fBmemo\fP <command> [\fIarguments\fP]
+
+.fam T
+.fi
+.fam T
+.fi
+.SH DESCRIPTION
+A tool to memorize stuff.
+It saves files $MEMO_DIR ($HOME/\fBmemo\fP by default).
+The structure is $MEMO_DIR/<topic>/memo.md
+You can also copy files in the topic folder as well.
+.PP
+We call the folder $MEMO_DIR/<topic> a 'topic folder'.
+.RE
+.PP
+
+.SH COMMANDS
+.TP
+.B
+add <topic> [text]
+adds text to the memo.md in the topic folder.
+if text is not given it will read from stdin.
+.TP
+.B
+copy <topic> <file-to-copy>
+copy a file to the topic folder.
+.TP
+.B
+search <term-to-search>
+search for a term in $MEMO_DIR using ack.
+.TP
+.B
+show <topic>
+shows memo.md in the topic folder.
+also showes a list of all files in the topic folder
+.TP
+.B
+list
+prints a list of all topics.
+.RE
+.PP
+
+.SH CONFIGURATION
+
+.TP
+.B
+$MEMO_DIR
+holds the folder where to store the \fBmemo\fP files.
+Default is $HOME/\fBmemo\fP
+.SH EXAMPLE
+
+
+Append the string "A search-engine" to the memo.md file
+in the topic "google".
+.PP
+.nf
+.fam C
+    $> memo add google A search-engine
+
+.fam T
+.fi
+Appends the content of "www.google.com" to the memo.md file
+the topic "google".
+.PP
+.nf
+.fam C
+    $> curl www.google.com | memo add google
+
+.fam T
+.fi
+Copy the "Invoice.pdf" file to the "lawsuit" topic.
+.PP
+.nf
+.fam C
+    $> memo copy lawsuit ~/Downloads/Invoice.pdf
+
+
+

doc/memo.txt

@@ -0,0 +1,53 @@
+NAME
+  memo
+
+SYNOPSIS
+  memo <command> [arguments]
+
+DESCRIPTION
+  A tool to memorize stuff.
+  It saves files $MEMO_DIR ($HOME/memo by default).
+  The structure is $MEMO_DIR/<topic>/memo.md
+  You can also copy files in the topic folder as well.
+
+  We call the folder $MEMO_DIR/<topic> a 'topic folder'.
+
+
+COMMANDS
+  add <topic> [text]      adds text to the memo.md in the topic folder.
+                          if text is not given it will read from stdin.
+
+  copy <topic> <file-to-copy>     copy a file to the topic folder.
+
+  search <term-to-search>         search for a term in $MEMO_DIR using ack.
+
+  show <topic>    shows memo.md in the topic folder.
+                  also showes a list of all files in the topic folder
+
+  list            prints a list of all topics.
+
+
+CONFIGURATION
+
+  $MEMO_DIR   holds the folder where to store the memo files.
+                Default is $HOME/memo
+
+EXAMPLE
+
+
+  Append the string "A search-engine" to the memo.md file
+  in the topic "google".
+
+    $> memo add google A search-engine
+
+  Appends the content of "www.google.com" to the memo.md file
+  the topic "google".
+
+    $> curl www.google.com | memo add google
+
+  Copy the "Invoice.pdf" file to the "lawsuit" topic.
+
+    $> memo copy lawsuit ~/Downloads/Invoice.pdf
+
+
+

memo

@@ -37,17 +37,24 @@ function precondition::provide_topic(){
 
 function add_memo(){
     topic_name=$1
-    shift
-    memo=$@
-
     precondition::provide_topic ${topic_name}
-
     topic_path=${MEMO_FOLDER}/${topic_name}
-    echo "append memo to ${topic_name}"
-    cat >>${topic_path}/memo.md <<EOF
+
+    shift
+    if [[ $# -gt 0 ]]
+    then
+        memo=$@
+        echo "append memo to ${topic_name}"
+        cat >>${topic_path}/memo.md <<EOF
 
 ${memo}
 EOF
+    else
+        echo "append input to ${topic_name}"
+        echo "" >>${topic_path}/memo.md
+        cat >>${topic_path}/memo.md -
+    fi
+
 }
 
 
@@ -172,6 +179,9 @@ Commands:
   add <topic> [memo]
     adds a memo.md in ${MEMO_FOLDER}/<topic>/
     containing the text
+    if memo is not given it will read from input
+    so piping is possible.
+    Example: cat file.txt | memo add topic
 
   copy <topic> <file to copy>
     copy a file to ${MEMO_FOLDER}/<topic>/