e825ba07a1
The code accounts for the config file not existing but it does not account for the parent directory missing. This is currently breaking any Ironic jobs that disable Nova. Change-Id: Ia5fcfe6c63f5cc40b11f7e1f3be244d7897f26f6
224 lines
7.5 KiB
Bash
224 lines
7.5 KiB
Bash
#!/bin/bash
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#
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# **lib/meta-config** - Configuration file manipulation functions
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#
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# Support for DevStack's local.conf meta-config sections
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#
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# These functions have no external dependencies and the following side-effects:
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#
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# CONFIG_AWK_CMD is defined, default is ``awk``
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# Meta-config files contain multiple INI-style configuration files
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# using a specific new section header to delimit them:
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#
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# [[group-name|file-name]]
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#
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# group-name refers to the group of configuration file changes to be processed
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# at a particular time. These are called phases in ``stack.sh`` but
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# group here as these functions are not DevStack-specific.
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#
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# file-name is the destination of the config file
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# Save trace setting
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_XTRACE_INC_META=$(set +o | grep xtrace)
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set +o xtrace
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# Allow the awk command to be overridden on legacy platforms
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CONFIG_AWK_CMD=${CONFIG_AWK_CMD:-awk}
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# Get the section for the specific group and config file
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# get_meta_section infile group configfile
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function get_meta_section {
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local file=$1
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local matchgroup=$2
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local configfile=$3
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[[ -r $file ]] || return 0
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[[ -z $configfile ]] && return 0
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$CONFIG_AWK_CMD -v matchgroup=$matchgroup -v configfile=$configfile '
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BEGIN { group = "" }
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/^\[\[.+\|.*\]\]/ {
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gsub("[][]", "", $1);
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split($1, a, "|");
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if (a[1] == matchgroup && a[2] == configfile) {
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group=a[1]
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} else {
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group=""
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}
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next
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}
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{
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if (group != "")
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print $0
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}
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' $file
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}
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# Get a list of config files for a specific group
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# get_meta_section_files infile group
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function get_meta_section_files {
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local file=$1
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local matchgroup=$2
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[[ -r $file ]] || return 0
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$CONFIG_AWK_CMD -v matchgroup=$matchgroup '
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/^\[\[.+\|.*\]\]/ {
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gsub("[][]", "", $1);
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split($1, a, "|");
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if (a[1] == matchgroup)
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print a[2]
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}
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' $file
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}
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# Merge the contents of a meta-config file into its destination config file
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# If configfile does not exist it will be created.
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# merge_config_file infile group configfile
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function merge_config_file {
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local file=$1
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local matchgroup=$2
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local configfile=$3
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# note, configfile might be a variable (note the iniset, etc
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# created in the mega-awk below is "eval"ed too, so we just leave
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# it alone.
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local real_configfile
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real_configfile=$(eval echo $configfile)
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if [ ! -f $real_configfile ]; then
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mkdir -p $(dirname $real_configfile) || die $LINENO "could not create the directory of $real_configfile ($configfile)"
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touch $real_configfile || die $LINENO "could not create config file $real_configfile ($configfile)"
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fi
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get_meta_section $file $matchgroup $configfile | \
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$CONFIG_AWK_CMD -v configfile=$configfile '
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BEGIN {
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section = ""
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last_section = ""
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section_count = 0
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}
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/^\[.+\]/ {
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gsub("[][]", "", $1);
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section=$1
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next
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}
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/^ *\#/ {
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next
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}
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/^[^ \t]+/ {
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# get offset of first '=' in $0
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eq_idx = index($0, "=")
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# extract attr & value from $0
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attr = substr($0, 1, eq_idx - 1)
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value = substr($0, eq_idx + 1)
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# only need to strip trailing whitespace from attr
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sub(/[ \t]*$/, "", attr)
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# need to strip leading & trailing whitespace from value
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sub(/^[ \t]*/, "", value)
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sub(/[ \t]*$/, "", value)
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# cfg_attr_count: number of config lines per [section, attr]
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# cfg_attr: three dimensional array to keep all the config lines per [section, attr]
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# cfg_section: keep the section names in the same order as they appear in local.conf
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# cfg_sec_attr_name: keep the attr names in the same order as they appear in local.conf
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if (! (section, attr) in cfg_attr_count) {
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if (section != last_section) {
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cfg_section[section_count++] = section
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last_section = section
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}
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attr_count = cfg_sec_attr_count[section_count - 1]++
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cfg_sec_attr_name[section_count - 1, attr_count] = attr
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cfg_attr[section, attr, 0] = value
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cfg_attr_count[section, attr] = 1
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} else {
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lno = cfg_attr_count[section, attr]++
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cfg_attr[section, attr, lno] = value
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}
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}
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END {
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# Process each section in order
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for (sno = 0; sno < section_count; sno++) {
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section = cfg_section[sno]
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# The ini routines simply append a config item immediately
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# after the section header. To keep the same order as defined
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# in local.conf, invoke the ini routines in the reverse order
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for (attr_no = cfg_sec_attr_count[sno] - 1; attr_no >=0; attr_no--) {
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attr = cfg_sec_attr_name[sno, attr_no]
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if (cfg_attr_count[section, attr] == 1)
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print "iniset " configfile " " section " " attr " \"" cfg_attr[section, attr, 0] "\""
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else {
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# For multiline, invoke the ini routines in the reverse order
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count = cfg_attr_count[section, attr]
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print "inidelete " configfile " " section " " attr
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print "iniset " configfile " " section " " attr " \"" cfg_attr[section, attr, count - 1] "\""
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for (l = count -2; l >= 0; l--)
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print "iniadd_literal " configfile " " section " " attr " \"" cfg_attr[section, attr, l] "\""
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}
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}
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}
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}
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' | while read a; do eval "$a"; done
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}
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# Merge all of the files specified by group
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# merge_config_group infile group [group ...]
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function merge_config_group {
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local localfile=$1; shift
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local matchgroups=$@
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[[ -r $localfile ]] || return 0
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local configfile group
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for group in $matchgroups; do
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for configfile in $(get_meta_section_files $localfile $group); do
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local realconfigfile
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local dir
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realconfigfile=$(eval "echo $configfile")
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if [[ -z $realconfigfile ]]; then
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warn $LINENO "unknown config file specification: $configfile is undefined"
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break
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fi
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dir=$(dirname $realconfigfile)
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if [[ -d $dir ]]; then
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merge_config_file $localfile $group $configfile
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else
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die $LINENO "bogus config file specification $configfile ($configfile=$realconfigfile, $dir is not a directory)"
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fi
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done
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done
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}
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function extract_localrc_section {
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local configfile=$1 # top_dir/local.conf
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local localrcfile=$2 # top_dir/localrc
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local localautofile=$3 # top_dir/.localrc.auto
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if [[ -r $configfile ]]; then
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LRC=$(get_meta_section_files $configfile local)
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for lfile in $LRC; do
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if [[ "$lfile" == "localrc" ]]; then
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if [[ -r $localrcfile ]]; then
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echo "localrc and local.conf:[[local]] both exist, using localrc"
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else
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echo "# Generated file, do not edit" >$localautofile
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get_meta_section $configfile local $lfile >>$localautofile
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fi
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fi
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done
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fi
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}
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# Restore xtrace
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$_XTRACE_INC_META
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# Local variables:
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# mode: shell-script
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# End:
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