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Full Discussion: How to parse config variables from external file to shell script
Top Forums Shell Programming and Scripting How to parse config variables from external file to shell script Post 302125948 by aigles on Monday 9th of July 2007 08:24:55 AM
Old 07-09-2007
You can do something like that :
Code:
# Function: get_config_list config_file
          # Purpose : Print the list of configs from config file
get_config_list()
{
   typeset config_file=$1

   awk -F '[][]' '
      NF==3 && $0 ~ /^\[.*\]/ { print $2 }
   ' ${config_file}
}

# Function : set_config_vars config_file config [var_prefix]
# Purpose  : Set variables (optionaly prefixed by var_prefix) from config in config file
set_config_vars()
{
   typeset config_file=$1
   typeset config=$2
   typeset var_prefix=$3
   typeset config_vars

   config_vars=$( 
        awk -F= -v Config="${config}" -v Prefix="${var_prefix}" '
        BEGIN { 
           Config = toupper(Config);
           patternConfig = "\\[" Config "]";
        }
        toupper($0)  ~ patternConfig,(/\[/ && toupper($0) !~ patternConfig)  { 
           if (/\[/ || NF <2) next;
           sub(/^[[:space:]]*/, "");
           sub(/[[:space:]]*=[[:space:]]/, "=");
           print Prefix $0;
        } ' ${config_file} )

   eval "${config_vars}"
}

#
# Set variables for all config from config file
#
file=config.txt
for cfg in $(get_config_list ${file})
do
   echo "--- Configuration [${cfg}] ---"
   unset $(set | awk -F= '/^cfg_/  { print $1 }') cfg_
   set_config_vars ${file} ${cfg} cfg_
   set | grep ^cfg_
done

Input file (config.txt)
Code:
[set_1]
path=c://dataset/set1
v1= a.bin
v2= b.bin

[set_2]
path=c://dataset/set2
v1= xy.bin
v2= abc.bin

[set_3]
v1 = value1

Output:
Code:
--- Configuration [set_1] ---
cfg_path=c://dataset/set1
cfg_v1=a.bin
cfg_v2=b.bin
--- Configuration [set_2] ---
cfg_path=c://dataset/set2
cfg_v1=xy.bin
cfg_v2=abc.bin
--- Configuration [set_3] ---
cfg_v1=value1

 

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mconfig

Mono(mconfig)															     Mono(mconfig)

NAME

       mconfig, - Utility for modifying .NET configuration files

SYNOPSIS

       mconfig [options] command [command_parameters]

DESCRIPTION

       mconfig	can  be  used to edit .NET configuration files, by adding "features" (that is sets of xml statements) defined in one of the config
       files read by mconfig. The config file can also define layouts of default configuration files, which may be useful for  bootstrapping  your
       .NET projects.

       To see the list of recognized commands, default configuration files and features, run mconfig without passing any parameters.

OPTIONS

       -c <config_file>, --config=<config_file>
	      Read  the specified config file after reading the other, preconfigured, config files for the utility. Settings in the specified file
	      override those found in the other configuration locations.

       -t {any | web | application}, --target={any | web | application}
	      Features and default configuration files defined in the mconfig config file(s) can be assigned to one of the  three  targets  -  web
	      (for ASP.NET features/config files), application - for .NET applications, any - applicable in both of the previous targets. Defaults
	      to any.

       -?, -h, --help
	      Show a summary usage screen.

       -v, --version
	      Show the mconfig version

COMMANDS

       {addfeature, af} <feature_name> [config_file_path]
	      Adds the feature named <feature_name> to the specified config file. If [config_file_path] is omitted, the name of the output config-
	      uration  file  will  be  chosen based on the selected target (see the -t option). The web target outputs configuration to file named
	      Web.config, and the application target outputs to file named application.exe.config. The any target does not have a  default  output
	      file.

	      If  the  specified  config file exists, the feature will be injected into it at the locations specified by mconfig configuration. If
	      the target config file does not exist, it will be created and will contain only the specified feature and all its dependencies.

       {defaultconfig, dc} [config_name [target_directory]]
	      Generates a default config file using the configuration entry named [config_name] and outputs the resulting  configuration  file	to
	      the directory given by the [target_directory] option.  If [config_name] is omitted, it defaults to Web.config for the web target and
	      application target. The any target does not specify any default output configuration name. If the  [target_directory]  parameter	is
	      omitted, it defaults to the current directory.

	      Name of the output config file created in [target_directory] is given in the config file layout definition.

FILES

       Config files are read in the order given below. Each subsequent file may override settings found in the files read before it.

       $prefix/etc/mono/mconfig/config.xml
	      The  default  configuration  file, distributed with mconfig. $prefix is the mconfig installation prefix specified on the compilation
	      time.

       $config_dir/mconfig/config.xml
	      $config_dir is the directory specified in the XDG_CONFIG_HOME environment variable or,
	       if it is empty, in the .config directory located in the user's home directory. This file is not distributed with Mono.

       ./mconfig.xml
	      Local configuration file which can contain per-application settings.

SEE ALSO

       mconfig.config (5)

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