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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
extract -t TYPE < STDIN
extract -h
EOF
}
help() {
cat <<-'EOF'
Options:
-t TYPE the type of extraction to perform ("content" or "env")
-h, --help show this message
Separate the content from the "frontmatter", and emit the
selected one.
Examples:
Get the content:
$ extract -t content < src/file.md > src/file.entry-content
Get the "frontmatter":
$ extract -t env < src/f.md > src/f.entry-env
EOF
}
for flag in "$@"; do
case "$flag" in
--)
break
;;
--help)
usage
help
exit
;;
*)
;;
esac
done
TYPE=''
while getopts 't:h' flag; do
case "$flag" in
t)
TYPE="$OPTARG"
;;
h)
usage
help
exit
;;
*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
eval "$(assert-arg "$TYPE" '-t TYPE')"
case "$TYPE" in
content)
awk '
separator >= 2
/^---$/ { separator++ }
'
;;
env)
awk '
/^---$/ {
if (++separator > 1) {
exit
} else {
next
}
}
{ print }
'
;;
*)
printf 'Bad value for TYPE: "%s".\n\n' \
"$TYPE" >&2
usage >&2
exit 2
;;
esac
|
