prj-env

#!/bin/bash
## Usage:
## 
##     . prj-env alias,var1,etc...
## 
## Example:
## 
##     . prj-env my,user,host
## 
## Creates ~/.prj-env/my script.  The my script sets
## the variables (var1,etc...).  Intially, this script will
## prompt for variables that are not already found in the my
## environment.  If all values are already available, this 
## script runs silently.
## 
##     export user=john
##     export host=johnDoe314.example.com
## 
## Alias is a short word used to retrieve envirnonment.
## Prompts user then saves response in ~/.prj-env/my
##    

IFS=',' read -ra ARRAY <<< "$1"
if test $# -ne 1 || 
  test ${#ARRAY[*]} -lt 2 || 
  test -z ${ARRAY[0]} ||
  echo ${ARRAY[0]} | egrep "^-"
then
  sh $(dirname $0)/prj-usage $0
  host-aliases
  exit 1
fi

alias=${ARRAY[0]}
unset ARRAY[0]

mkdir -p ~/.prj-env
touch ~/.prj-env/$alias
chmod u+x ~/.prj-env/$alias

for var in ${ARRAY[*]}
do
  # If we do not have a variable for this, prompt and save one
  if ! $(egrep "export $var=" ~/.prj-env/$alias > /dev/null)
  then
    read -p "~/.prj-env/$alias: export $var=" val
    
    # Save the new variable
    echo "export $var=$val" >> ~/.prj-env/$alias
  fi
  
done

. ~/.prj-env/$alias