diff options
| -rwxr-xr-x | bin/rfc | 124 |
1 files changed, 82 insertions, 42 deletions
@@ -1,12 +1,21 @@ #!/bin/sh set -eu -TARBALL_URL='https://www.rfc-editor.org/in-notes/tar/RFC-all.tar.gz' +D="${XDG_DATA_HOME:-$HOME/.local/share}/doc/rfc" +PROMPT_DB="$( + cat <<-EOF + RFC directory does not exist: + $D/ + + Do you want to download the files to create it? + EOF +)" usage() { cat <<-'EOF' Usage: rfc [-w] RFC_NUMBER + rfc -u rfc -h EOF } @@ -15,8 +24,9 @@ help() { cat <<-'EOF' Options: - -w Show the path to the RFC file instead of displaying - its contents. + -w show the path to the RFC file instead of displaying + its contents + -u update the local RFC database -h, --help show this message Lookup the given RFC @@ -25,14 +35,66 @@ help() { $ $PAGER $XDG_DATA_HOME/doc/rfc/rfc$RFC_NUMBER.txt - If the $XDG_DATA_HOME/doc/rfc/ directory doesn't exist, it tries to - create it by downloading the latest RFC tarball [0] and placing all .txt + If the $XDG_DATA_HOME/doc/rfc/ directory doesn't exist, it gets + created it by downloading the latest RFC files and placing all .txt files there. + + + Examples: + + + Show RFC 1234 in $PAGER: + + $ rfc 1234 + + + Print path to RFC 2222: + + $ rfc 2222 + + + Download the latest RFCs: + + $ rfc -u EOF +} - printf '\n[0]: %s\n' "$TARBALL_URL" +view() { + if [ -t 1 ]; then + ${PAGER:-cat} + else + cat + fi +} + +update() { + rsync -avzP --delete ftp.rfc-editor.org::rfcs-text-only "$D" + STATUS=$? + if [ "$STATUS" != 0 ]; then + exit "$STATUS" + fi } +check_local_db() { + if [ ! -e "$D" ]; then + if prompt "$PROMPT_DB"; then + update + else + echo 'No local RFC database to operate on.' >&2 + exit 1 + fi + fi +} + +assert_arg() { + if [ -z "$1" ]; then + printf 'Missing %s.\n\n' "$2" >&2 + usage >&2 + exit 2 + fi +} + + for flag in "$@"; do case "$flag" in --) @@ -48,11 +110,14 @@ for flag in "$@"; do esac done -while getopts 'wh' flag; do +while getopts 'wuh' flag; do case "$flag" in w) WHERE=true ;; + u) + UPDATE=true + ;; h) usage help @@ -67,34 +132,16 @@ done shift $((OPTIND - 1)) RFC_NUMBER="${1:-}" -if [ -z "$RFC_NUMBER" ]; then - echo 'Missing argument RFC_NUMBER' >&2 - usage >&2 - exit 2 -fi +F="$D/rfc${RFC_NUMBER}.txt" -D="${XDG_DATA_HOME:-$HOME/.local/share}/doc/rfc" -if [ ! -e "$D" ]; then - printf 'RFC directory does not exist:\n\t%s/\n\n' "$D" - printf 'Do you want to download the files to create it? [Y/n] ' - read -r yesno - if [ "$yesno" != 'n' ] && [ "$yesno" != 'N' ]; then - CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/rfc-cli" - mkdir -p "$CACHE_DIR" - wget -cO "$CACHE_DIR"/RFC-all.tar.gz "$TARBALL_URL" - rm -rf "$CACHE_DIR/tmp" - mkdir -p "$CACHE_DIR/tmp" - tar \ - -C "$CACHE_DIR/tmp" \ - -xvf "$CACHE_DIR"/RFC-all.tar.gz \ - --wildcards \ - 'rfc*.txt' - mkdir -p "$(dirname "$D")" - mv "$CACHE_DIR/tmp" "$D" - fi + +if [ "${UPDATE:-}" = true ]; then + update + exit fi -F="$D/rfc${RFC_NUMBER}.txt" +assert_arg "$RFC_NUMBER" + if [ ! -e "$F" ]; then printf 'Given RFC_NUMBER "%s" does not exist at:\n%s\n' \ "$RFC_NUMBER" "$F" >&2 @@ -104,14 +151,7 @@ fi if [ "${WHERE:-}" = true ]; then printf '%s\n' "$F" exit +else + view < "$F" + exit fi - -view() { - if [ -t 1 ]; then - ${PAGER:-cat} - else - cat - fi -} - -view < "$F" |