Terminal IDE - builder

There's an app for Android devices called Terminal IDE by Spartacus Rex. It's a command line development environment for Java and Android and appears to now be hosted in Google Code.

I've been using it for a while off and on, when I'm working on something that won't wait until I have a computer but doesn't warrant carrying a machine with me (like on a backpacking trip). Its power and simplicity make it perfect for a little on-the-go coding as ideas come to mind.

One part that wasn't so simple when I first got started was the builder. I found it to be a little clunky to use. There is another builder script here, along with a few other utilities. That one has lots of options.

Below, I'm posing a builder that I wrote some time ago that is very simple and only has a couple options. It has served me well so perhaps you'll also find it useful.

---

The simplest way to build and execute your code is to place the script in your home directory (~). Then, cd into the directory containing your .java file, and run this line:
. ~/builder.sh -l

For the help file, you can always run: . ~/builder.sh -h

---

Here is the entire script:

#!~/system/bin/bash

#Simple Build Script

#For some reason the getopts index needs to be reset manually...

OPTIND=0

launch=0
compile=1
javaFilename=""

while getopts "f:hlo" opt

do

case $opt in
f)
       javaFilename=${OPTARG%.*}
       ;;
     l)
       launch=1
       ;;
     o)
       compile=0
       launch=1
       ;;
     \? | h)
       usage
       return
       ;;
     esac

done

usage()
{
scriptname=builder.sh
cat << EOF
usage: $scriptname [ hlo ] [ f filename.java ]
-h    Show this message
-l    Launch file after building
-o    Only launch, no build
-f    Specify a file instead of finding the java file in the current directory

You may specify class locations by listing them in a file named "includes" in the same directory as the java file to be launched.

Execution examples:
To build the java file in the current directory: $scriptname
To build and launch:                             $scriptname -l
To launch only:                                  $scriptname -o
To specify a file to build and launch:           $scriptname -lf filename.java

Example includes file:

# Bring in my utilities classes

../utilities

EOF
}

#Find java javaFilename if none given

if [[ $javaFilename == "" ]]; then

if [ `ls -l |grep -c .java` != 1 ]; then

       echo  Because there is not a solitary java file in the directory, you must specify a filename using the -f switch.
return

fi

javaFilename=`find . -name *.java`

javaFilename=${javaFilename:2:-5}

else

if [ ! -f ${javaFilename}.java ]; then
echo File ${javaFilename}.java not found.
return

fi

fi

compileList=""
includeList=""
delimiter=""

#Prepare to include other classes, if specified.

if [ -f includes ]; then

while read line; do

if [ "${line}" != "" -a "${line:0:1}" != "#" ]; then

includeList=${includeList}" "${line}"/*.class"
compileList=${compileList}${delimiter}${line}
delimiter=":"
fi
done < includes

else

echo No \"includes\" file.

fi

if [ $compile -eq 1 ]; then

#Clean up. This does not clean up inner class classfiles but does allow for multiple class files in the same directory to be included in the generated jar.

if [ -f ${javaFilename}.class ]; then
rm ${javaFilename}.class

fi

if [ -f ${javaFilename}.jar ];then
rm ${javaFilename}.jar

fi

#Compile java file into classfile(s).

if [ -z $compileList ]; then
javac -verbose ${javaFilename}.java

else

javac -verbose ${javaFilename}.java -classpath $compileList

fi

#Now convert to dex file. The assumption is you want to include all class files in the directory.

dx --dex --verbose --output=${javaFilename}.jar ./*.class $includeList

fi

#Finally, launch if specified.

if [ $launch -eq 1 ]; then
java -jar ${javaFilename}.jar $javaFilename

fi