mirror of
https://github.com/percona/percona-toolkit.git
synced 2025-09-10 13:11:32 +00:00
Parse option specs, allow negating with --no-, add more tests.
This commit is contained in:
Daniel Nichter
@@ -46,17 +46,12 @@ usage() {
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local file=$1
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local usage=$(grep '^Usage: ' $file)
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local opts=$(grep -A 2 '^=item --' $file | sed -e 's/^=item //' -e 's/^\([A-Z]\)/ \1/' -e 's/^--$//' > $TMPDIR/help)
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if [ "$OPT_ERR" ]; then
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echo "Error: ${OPT_ERR}" >&2
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fi
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echo $usage >&2
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echo >&2
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echo "Options:" >&2
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echo >&2
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cat $TMPDIR/help >&2
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echo >&2
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echo "For more information, 'man $TOOL' or 'perldoc $file'." >&2
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}
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@@ -77,57 +72,100 @@ parse_options() {
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local file=$1
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shift
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local opt=""
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local val=""
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local default=""
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local version=""
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local i=0
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awk '
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# Parse the program options (po) from the POD. Each option has
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# a spec file like:
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# $ cat po/string-opt2
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# long=string-opt2
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# type=string
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# default=foo
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# That's the spec for --string-opt2. Each line is a key:value pair
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# from the option's POD line like "type: string; default: foo".
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mkdir $TMPDIR/po/ 2>/dev/null
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rm -rf $TMPDIR/po/*
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awk -v "po_dir"="$TMPDIR/po" '
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/^=head1 OPTIONS/ {
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getline
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while ($0 !~ /^=head1/) {
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if ($0 ~ /^=item --.*/) {
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long_opt=substr($2, 3, length($2) - 2)
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short_opt=""
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required_arg=""
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if ($3) {
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if ($3 ~ /-[a-z]/)
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short_opt=substr($3, 3, length($3) - 3)
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else
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required_arg=$3
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}
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if ($4 ~ /[A-Z]/)
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required_arg=$4
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long_opt = substr($2, 3, length($2) - 2)
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spec_file = po_dir "/" long_opt
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trf = "sed -e \"s/[ ]//g\" | tr \";\" \"\n\" > " spec_file
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getline # blank line
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getline # short description line
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getline # specs or description
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if ($0 ~ /default: /) {
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i=index($0, "default: ")
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default=substr($0, i + 9, length($0) - (i + 9))
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if ($0 ~ /^[a-z]/ ) {
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# spec line like "type: int; default: 100"
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print "long:" long_opt "; " $0 | trf
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}
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else {
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# no specs, should be description of option
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print "long:" long_opt > spec_file
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}
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else
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default=""
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print long_opt "," short_opt "," required_arg "," default
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}
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getline
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}
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exit
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}' $file > $TMPDIR/options
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}' $file
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while read spec; do
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opt=$(echo $spec | cut -d',' -f1 | sed 's/-/_/g' | tr [:lower:] [:upper:])
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default=$(echo $spec | cut -d',' -f4)
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eval "OPT_${opt}"="$default"
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done < <(cat $TMPDIR/options)
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# Evaluate the program options into existence as global variables
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# transformed like --my-op == $OPT_MY_OP. If an option has a default
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# value, it's assigned that value. Else, it's value is an empty string.
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for opt_spec in $(ls $TMPDIR/po/); do
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local opt=""
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local default_val=""
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local neg=0
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while read line; do
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local key=`echo $line | cut -d ':' -f 1`
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local val=`echo $line | cut -d ':' -f 2`
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case "$key" in
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long)
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opt=$(echo $val | sed 's/-/_/g' | tr [:lower:] [:upper:])
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;;
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default)
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default_val="$val"
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;;
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shortform)
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;;
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type)
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;;
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negatable)
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if [ "$val" = "yes" ]; then
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neg=1
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fi
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;;
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*)
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die "Invalid attribute in $TMPDIR/po/$opt_spec: $line"
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esac
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done < $TMPDIR/po/$opt_spec
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if [ -z "$opt" ]; then
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die "No long attribute in option spec $TMPDIR/po/$opt_spec"
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fi
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if [ $neg -eq 1 ]; then
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if [ -z "$default_val" ] || [ "$default_val" != "yes" ]; then
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die "Option $opt_spec is negatable but not default: yes"
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fi
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fi
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eval "OPT_${opt}"="$default_val"
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done
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# Parse the command line options. Anything after -- is put into
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# EXT_ARGV. Options must begin with one or two hyphens (--help or -h),
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# else the item is put into ARGV (it's probably a filename, directory,
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# etc.) The program option specs parsed above are used to valid the
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# command line options. All options have already been eval'd into
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# existence, but we re-eval opts specified on the command line to update
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# the corresponding global variable's value. For example, if --foo has
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# a default value 100, then $OPT_FOO=100 already, but if --foo=500 is
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# specified on the command line, then we re-eval $OPT_FOO=500 to update
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# $OPT_FOO.
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local i=0 # ARGV index
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for opt; do
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if [ $# -eq 0 ]; then
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break
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break # no more opts
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fi
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opt=$1
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if [ "$opt" = "--" ]; then
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@@ -144,30 +182,62 @@ parse_options() {
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usage $file
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exit 0
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fi
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shift
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shift
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if [ $(expr "$opt" : "-") -eq 0 ]; then
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# Option does not begin with a hyphen (-), so treat it as
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# a filename, directory, etc.
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ARGV[i]="$opt"
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i=$((i+1))
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continue
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fi
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opt=$(echo $opt | sed 's/^-*//')
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spec=$(grep -E "^$opt,|,$opt," "$TMPDIR/options")
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if [ -z "$spec" ]; then
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die "Unknown option: $opt"
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# Save real opt from cmd line for error messages.
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local real_opt="$opt"
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# Strip leading -- or --no- from option.
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if $(echo $opt | grep -q '^--no-'); then
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neg=1
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opt=$(echo $opt | sed 's/^--no-//')
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else
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neg=0
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opt=$(echo $opt | sed 's/^-*//')
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fi
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opt=$(echo $spec | cut -d',' -f1)
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required_arg=$(echo $spec | cut -d',' -f3)
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val="yes"
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# Find the option's spec file.
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if [ -f "$TMPDIR/po/$opt" ]; then
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spec="$TMPDIR/po/$opt"
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else
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spec=$(grep "^shortform:-$opt\$" $TMPDIR/po/* | cut -d ':' -f 1)
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if [ -z "$spec" ]; then
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die "Unknown option: $opt"
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fi
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fi
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# Get the value specified for the option, if any. If the opt's spec
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# says it has a type, then it requires a value and that value should
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# be the next item ($1). Else, typeless options (like --version) are
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# either "yes" if specified, else "no" if negatable and --no-opt.
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required_arg=$(cat $spec | grep '^type:' | cut -d':' -f2)
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if [ -n "$required_arg" ]; then
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if [ $# -eq 0 ]; then
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die "--$opt requires a $required_arg argument"
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die "$real_opt requires a $required_arg argument"
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else
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val="$1"
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shift
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fi
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else
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if [ $neg -eq 0 ]; then
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val="yes"
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else
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val="no"
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fi
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fi
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opt=$(echo $opt | sed 's/-/_/g' | tr [:lower:] [:upper:])
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eval "OPT_${opt}"="$val"
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# Get and transform the opt's long form. E.g.: -q == --quiet == QUIET.
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opt=$(cat $spec | grep '^long:' | cut -d':' -f2 | sed 's/-/_/g' | tr [:lower:] [:upper:])
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# Re-eval the option to update its global variable value.
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eval "OPT_$opt"="$val"
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done
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}
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