AWK passing ENV variables -


i have following code pass env variables awk.

  awk 'function pr(sp, k, v){    # prints key-value pair indentation          printf "%s\047%s\047: \047%s\047,\n",sp,k,v;       }     begin {     db_user = environ["db_user"]     db_pass = environ["db_pass"]     db_name = environ["db_name"]     }      /sqlite/{ sub(/sqlite[0-9]*/,"mysql",$0) }      /name/{ sp=substr($0,1,index($0,"\047")-1);               print sp$1" \047db_name\047,";               pr(sp,"user", db_user); pr(sp,"password", db_pass);               pr(sp,"host","localhost"); pr(sp,"port",""); next       }1'

i can db_name replaced env variable. 

db_name = django

my results are:

databases = {     'default': {         'engine': 'django.db.backends.mysql',         'name': 'db_name',         'user': 'django',         'password': 'django',         'host': 'localhost',         'port': '',       } }

the problem incorrect use of print statement in awk. seen gnu awk print() page, need move variable outside quotes see expanded value.

print sp$1" \047db_name\047,";  #               ^^^^^^^ awk not understand db_name  within quotes

just make outside quotes below.

print sp$1" \047"db_name"\047,"

(or) use printf altogether separate format specifiers variables , below

printf "%s %s \047%s\047,\n",sp,$1,db_name

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