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#!/bin/sh

#
# Parse a cgit-style repo index provided on stdin
#

if [ $# -lt 2 ]; then 
	printf "Usage: %s <urlbase> <destdir> [<repourl>]\n" $0
	exit 1
fi

FIN="/dev/stdin"
URLBASE="$1"
DEST="$2"
SUBPATH="/plain"
CURL="torify curl -Ls "
TMPFILE="./tmp_$$"
READMES="README README.txt README.md readme readme.txt readme.md"


if [ $# -gt 2 ]; then 
	REPOURL="$3"
else
	REPOURL="$URLBASE"
fi


## func
cleanup () {
	rm -f $TMPFILE
	exit 
}

## func
get_repos() {

repos=$(${CURL} "$URLBASE" | xml2tsv | grep -Ei "/html/body/div/div/table/tr/td/a[[:blank:]]+title=" \
		| awk -F'\t' '{print $3,$4}' \
		| sed -E 's/href=//g;s/ /\|/'\
		)
}

## func
get_descr() {
	reponame=$1
	url=$2
	echo "reponame: $reponame"
	echo "url: $url"
	## Get author and description

	$CURL "$url" | xml2tsv | grep -Ei "/html/body/div/table/tr/td[[:blank:]]+class=sub" | \
##	cat "$TMPFILE" | grep -Ei "/html/body/div/div/table/tr/td/a[[:blank:]]+href=$link" |\
		tail -2 | cut -f 3-
	
}

## func
get_readmes() {
	LINK=$1
	DESTDIR=$2
	for f in $READMES; do
		printf "    trying file %s..." $LINK/$f
		$CURL "$LINK/$f" > $DESTDIR/$f
		failure=$(xml2tsv < $DESTDIR/$f 2>/dev/null | \
			grep -Eaic "/html/body/div/div/div[[:blank:]]+class=error[[:blank:]]+Not found")
		echo $failure
		if [ "$failure" != 0 ]; then 
			rm -f $DESTDIR/$f
			printf "[FAILED]\n"
		else
			printf "[OK]\n"
		fi
		sleep 1
	done
}

PROTO=${URLBASE%%:\/\/*}
DIRBASE="$PROTO/${REPOURL##[a-z]*:\/\/}"
echo "proto: $PROTO"
echo "dirbase: $DIRBASE"

trap cleanup EXIT KILL TERM INT

$CURL "${URLBASE}"  | xml2tsv > $TMPFILE 

get_repos

for r in $repos; do
	printf "Retrieving repo %s...\n" $repo
	link=$(echo "$r" | cut -d "|" -f 1 )
	name=$(echo "$r" | cut -d "|" -f 2 )
	baselink=$(printf "%s%s" $REPOURL $link)
	REPODIR="$DEST/$DIRBASE/$link/"
	mkdir -p $REPODIR
	get_descr "$link" "$baselink" > ${REPODIR}/DESCR	
	## Get READMEs
	get_readmes "$baselink/$SUBPATH" "$REPODIR"
done

clenaup

### the readme file is at REPLINK/plain/README

### if not found, look for "/html/body/div/div/div  class=error     Not found"