| # lib/config - Configuration file manipulation functions |
| |
| # These functions have no external dependencies and the following side-effects: |
| # |
| # CONFIG_AWK_CMD is defined, default is ``awk`` |
| |
| # Meta-config files contain multiple INI-style configuration files |
| # using a specific new section header to delimit them: |
| # |
| # [[group-name|file-name]] |
| # |
| # group-name refers to the group of configuration file changes to be processed |
| # at a particular time. These are called phases in ``stack.sh`` but |
| # group here as these functions are not DevStack-specific. |
| # |
| # file-name is the destination of the config file |
| |
| # Save trace setting |
| C_XTRACE=$(set +o | grep xtrace) |
| set +o xtrace |
| |
| |
| # Allow the awk command to be overridden on legacy platforms |
| CONFIG_AWK_CMD=${CONFIG_AWK_CMD:-awk} |
| |
| # Get the section for the specific group and config file |
| # get_meta_section infile group configfile |
| function get_meta_section { |
| local file=$1 |
| local matchgroup=$2 |
| local configfile=$3 |
| |
| [[ -r $file ]] || return 0 |
| [[ -z $configfile ]] && return 0 |
| |
| $CONFIG_AWK_CMD -v matchgroup=$matchgroup -v configfile=$configfile ' |
| BEGIN { group = "" } |
| /^\[\[.+\|.*\]\]/ { |
| if (group == "") { |
| gsub("[][]", "", $1); |
| split($1, a, "|"); |
| if (a[1] == matchgroup && a[2] == configfile) { |
| group=a[1] |
| } |
| } else { |
| group="" |
| } |
| next |
| } |
| { |
| if (group != "") |
| print $0 |
| } |
| ' $file |
| } |
| |
| |
| # Get a list of config files for a specific group |
| # get_meta_section_files infile group |
| function get_meta_section_files { |
| local file=$1 |
| local matchgroup=$2 |
| |
| [[ -r $file ]] || return 0 |
| |
| $CONFIG_AWK_CMD -v matchgroup=$matchgroup ' |
| /^\[\[.+\|.*\]\]/ { |
| gsub("[][]", "", $1); |
| split($1, a, "|"); |
| if (a[1] == matchgroup) |
| print a[2] |
| } |
| ' $file |
| } |
| |
| |
| # Merge the contents of a meta-config file into its destination config file |
| # If configfile does not exist it will be created. |
| # merge_config_file infile group configfile |
| function merge_config_file { |
| local file=$1 |
| local matchgroup=$2 |
| local configfile=$3 |
| |
| get_meta_section $file $matchgroup $configfile | \ |
| $CONFIG_AWK_CMD -v configfile=$configfile ' |
| BEGIN { section = "" } |
| /^\[.+\]/ { |
| gsub("[][]", "", $1); |
| section=$1 |
| next |
| } |
| /^ *\#/ { |
| next |
| } |
| /^[^ \t]+/ { |
| split($0, d, " *= *") |
| print "iniset " configfile " " section " " d[1] " \"" d[2] "\"" |
| } |
| ' | while read a; do eval "$a"; done |
| |
| } |
| |
| |
| # Merge all of the files specified by group |
| # merge_config_group infile group [group ...] |
| function merge_config_group { |
| local localfile=$1; shift |
| local matchgroups=$@ |
| |
| [[ -r $localfile ]] || return 0 |
| |
| local configfile group |
| for group in $matchgroups; do |
| for configfile in $(get_meta_section_files $localfile $group); do |
| if [[ -d $(dirname $(eval "echo $configfile")) ]]; then |
| merge_config_file $localfile $group $configfile |
| fi |
| done |
| done |
| } |
| |
| |
| # Restore xtrace |
| $C_XTRACE |
| |
| # Local variables: |
| # mode: shell-script |
| # End: |