bash script to cd to value it reads from configuration file - bash

Question

I am having trouble with a bash script that is launched as a subshell from another shell. The script is installed in a number of different environments each of which have a variety of local-specific values set in a single config file per environment.
(UPDATE: actual code included)
Immediately on launch, the script needs to change to a directory whose value $scriptpath it must read from a configuration file that sets many other local variable values. (I know how to read this particular value from the correct line of config file using sed). The reason I have it set up this way is that the script sets configuration variables before it reads the positional parameters (so that the parameters will trump the configuration variables).
Because this script is used by others and must be easy to install, I do not want to set up aliases, functions, or shell procedures that would require a user to make changes to his local environment. I want all needed config values, including $scriptpath, to be in a single configuration file.
OR $scriptpath could be set from the parent shell. BUT because I process the positional parameters later in the script, I have had trouble processing them both right at the top and later.
the script is triggered from a shell script that is launched by a Magento extension. The squiggly brackets are values drawn from the Magento database by the extension.
scriptpath={{var base_path}}
echo $scriptpath
export scriptpath
/opt/bitnami/apache2/htdocs/git-pk-production/pagekicker-community/scripts/bin/builder.sh --scriptpath "{{var base_path}}"--seedfile "{{var base_tmp_path}}/seedlist" --booktype "{{var product.booktype}}" --buildtarget "{{var target}}" --jobprofile "{{var product.jobprofile}}.jobprofile" --booktitle "{{var product.name}}" --truncate_seed "yes" --ebook_format "mobi" --sample_tweets "no" --wikilang "{{var product.wikilang}}" --coverfont "{{var product.coverfont}}" --covercolor "{{var product.covercolor}}" --customername "{{var customer.name}}" --yourname "{{var product.yourname}}"
builder.sh:
#!/bin/bash
# accepts book topic and book type definition, then builds book
echo "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB"
#scriptpath=$(cat scriptpath.var) #works but is not portable
# echo $scriptpath
cd $scriptpath
. ../conf/config.txt
. includes/set-variables.sh
#echo "set variables, now echoing them"
# . includes/echo-variables.sh
echo "revision number is" $SFB_VERSION
echo "sfb_log is" $sfb_log
echo "completed reading config file and beginning logging at" `date +'%m/%d/%y%n %H:%M:%S'`
jobprofile="default"
jobprofilename="default"
singleseed="none"
sample_tweets="no"
todaysdate=`date`
wikilang="en"
summary="false"
truncate_seed="yes"
coverfont="Minion"
covercolor="RosyBrown"
export PERL_SIGNALS="unsafe"
echo "PERL_SIGNALS" is $PERL_SIGNALS
while :
do
case $1 in
--help | -\?)
echo "for help review source code for now"
exit 0 # This is not an error, the user requested help, so do not exit status 1.
;;
--passuuid)
passuuid=$2
shift 2
;;
--passuuid=*)
passuuid=${1#*=}
shift
;;
--seedfile)
seedfile=$2
shift 2
;;
--seedfile=*)
seedfile=${1#*=}
shift
;;
--booktype)
booktype=$2
shift 2
;;
--booktype=*)
booktype=${1#*=}
shift
;;
--booktitle)
booktitle=$2
shift 2
;;
--booktitle=*)
booktitle=${1#*=}
shift
;;
--buildtarget)
buildtarget=$2
shift 2
;;
--buildtarget=*)
buildtarget=${1#*=}
shift
;;
--singleseed)
singleseed=$2
shift 2
;;
--singleseed=*)
singleseed=${1#*=}
shift
;;
--truncate_seed)
truncate_seed=$2
shift 2
;;
--truncate_seed=*)
shift
truncate_seed=${1#*=}
;;
--sample_tweets)
sample_tweets=$2
shift 2
;;
--sample_tweets=*)
shift
sample_tweets=${1#*=}
;;
--ebook_format)
ebook_format=$2
shift 2
;;
--ebook_format=*)
shift
ebook_format=${1#*=}
;;
--jobprofile)
jobprofile=$2
shift 2
;;
--jobprofile=*)
jobprofile=${1#*=}
shift
;;
--jobprofilename)
jobprofilename=$2
shift 2
;;
--jobprofilename=*)
jobprofilename=${1#*=}
shift
;;
--wikilang)
wikilang=$2
shift 2
;;
--wikilang=*)
wikilang=${1#*=}
shift
;;
--summary)
summary=$2
shift 2
;;
--summary=*)
summary=${1#*=}
shift
;;
--safe_product_name)
safe_product_name=$2
shift 2
;;
--safe_product_name=*)
safe_product_name=${1#*=}
shift
;;
--coverfont)
coverfont=$2
shift 2
;;
--coverfont=*)
coverfont=${1#*=}
shift
;;
--covercolor)
covercolor=$2
shift 2
;;
--covercolor=*)
covercolor=${1#*=}
shift
;;
--fromccc)
fromccc=$2
shift 2
;;
--fromccc=*)
fromccc=${1#*=}
shift
;;
--editedby)
editedby=$2
shift 2
;;
--editedby=*)
editedby=${1#*=}
shift
;;
--yourname)
yourname=$2
shift 2
;;
--yourname=*)
yourname=${1#*=}
shift
;;
--customername)
customername=$2
shift 2
;;
--customername=*)
customername=${1#*=}
shift
;;
--storecode)
storecode=$2
shift 2
;;
--storecode=*)
storecode=${1#*=}
shift
;;
--environment)
environment=$2
shift 2
;;
--environment=*)
environment=${1#*=}
shift
;;
--shortform)
shortform=$2
shift 2
;;
--shortform=*)
shortform=${1#*=}
shift
;;
--flickr)
flickr=$2
shift 2
;;
--flickr=*)
flickr=${1#*=}
shift
;;
--dontcleanupseeds)
dontcleanupseeds=$2
shift 2
;;
--dontcleanupseeds=*)
dontcleanupseeds=${1#*=}
shift
;;
--batch_uuid)
batch_uuid=$2
shift 2
;;
--batch_uuid=*)
batch_uuid=${1#*=}
shift
;;
--) # End of all options
shift
break
;;
-*)
echo "WARN: Unknown option (ignored): $1" >&2
shift
;;
*) # no more options. Stop while loop
break
;;
esac
done
# Suppose some options are required. Check that we got them.
if [ ! "$passuuid" ] ; then
echo "creating uuid"
uuid=$("$PYTHON_BIN" -c 'import uuid; print uuid.uuid1()')
echo "uuid is" $uuid | tee --append $xform_log
mkdir -p -m 777 $TMPDIR$uuid
else
uuid=$passuuid
echo "received uuid " $uuid
mkdir -p -m 777 $TMPDIR$uuid
fi
if [ -z "$covercolor" ]; then
covercolor="RosyBrown"
echo "no cover color in command line so I set it to "$covercolor
else
echo "$covercolor"
fi
if [ -z "$coverfont" ]; then
coverfont="Minion"
echo "no cover font in command line so I set it to "$coverfont
else
echo "$coverfont"
fi
if [ -z "$wikilang" ]; then
wikilang="en"
echo "no wikilang in command line so I set it to "$wikilang
else
echo "$wikilang"
fi
echo "debug: booktitle is $booktitle"
echo "debug: scriptpath is $scriptpath"
The result is this:
scriptpath={{var base_path}}
echo $scriptpath
export scriptpath
Executing: /opt/bitnami/apache2/htdocs/git-pk-production/pagekicker-community/scripts/bin/builder.sh --seedfile "/opt/bitnami/apps/magento/htdocs/media/downloadable/tmp/build/8/seedlist" --booktype "Default" --buildtarget "/opt/bitnami/apps/magento/htdocs/media/downloadable/tmp/build/8/Russian_intervention_in_Syria.mobi" --jobprofile "default.jobprofile" --booktitle "Russian intervention in Syria" --truncate_seed "yes" --ebook_format "mobi" --sample_tweets "no" --wikilang "en" --coverfont "Adler" --covercolor "DodgerBlue1" --customername "Fred Zimmerman" --yourname ""
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
revision number is
sfb_log is
completed reading config file and beginning logging at 06/12/16 18:43:09
PERL_SIGNALS is unsafe
debug: booktitle is Russian intervention in Syria
creating uuid
uuid is
DodgerBlue1
Adler
en
debug: exiting for test
Exit status returned: 0
Target File is missing: /opt/bitnami/apps/magento/htdocs/media/downloadable/tmp/build/8/Russian_intervention_in_Syria.mobi
Notification Information

Answer 1

This fixed my problem:
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
echo $DIR
cd $DIR
. $DIR/../../conf/config.txt
cd $scriptpath
With the program aware of its own location, it is able to find the right configuration values.