sfeed_update/sfeedrc: add url as parameter to the filter() and order() function

This might make it easier to set filters or ordering by pattern matching on a
group of feeds by the feed URL. For example youtube or reddit feeds.

Another way which was already possible is prefixing names with for example:
"reddit somename" or "yt somename".

3 files changed, 12 insertions, 8 deletions

diff --git a/README b/README
index fbe40b6..d128360 100644
--- a/README
+++ b/README
@@ -336,7 +336,7 @@ filtering items per feed. It can be used to shorten URLs, filter away
 advertisements, strip tracking parameters and more.
 
 	# filter fields.
-	# filter(name)
+	# filter(name, url)
 	filter() {
 		case "$1" in
 		"tweakers")
diff --git a/sfeed_update b/sfeed_update
index 3da45d3..dadea9b 100755
--- a/sfeed_update
+++ b/sfeed_update
@@ -71,7 +71,7 @@ parse() {
 }
 
 # filter fields.
-# filter(name)
+# filter(name, url)
 filter() {
 	cat
 }
@@ -83,7 +83,7 @@ merge() {
 }
 
 # order by timestamp (descending).
-# order(name)
+# order(name, url)
 order() {
 	sort -t '	' -k1rn,1
 }
@@ -124,7 +124,7 @@ _feed() {
 	fi
 	rm -f "${tmpfeedfile}.utf8"
 
-	if ! filter "${name}" < "${tmpfeedfile}.tsv" > "${tmpfeedfile}.filter"; then
+	if ! filter "${name}" "${feedurl}" < "${tmpfeedfile}.tsv" > "${tmpfeedfile}.filter"; then
 		log_error "${name}" "FAIL (FILTER)"
 		return 1
 	fi
@@ -142,7 +142,7 @@ _feed() {
 	fi
 	rm -f "${tmpfeedfile}.filter"
 
-	if ! order "${name}" < "${tmpfeedfile}.merge" > "${tmpfeedfile}.order"; then
+	if ! order "${name}" "${feedurl}" < "${tmpfeedfile}.merge" > "${tmpfeedfile}.order"; then
 		log_error "${name}" "FAIL (ORDER)"
 		return 1
 	fi
diff --git a/sfeedrc.5 b/sfeedrc.5
index 91f82ce..16e0641 100644
--- a/sfeedrc.5
+++ b/sfeedrc.5
@@ -1,4 +1,4 @@
-.Dd January 18, 2023
+.Dd June 9, 2023
 .Dt SFEEDRC 5
 .Os
 .Sh NAME
@@ -101,13 +101,15 @@ URL of the feed.
 Base URL of the feed links.
 This argument allows to fix relative item links.
 .El
-.It Fn filter "name"
+.It Fn filter "name" "url"
 Filter
 .Xr sfeed 5
 data from stdin and write it to stdout, its arguments are:
 .Bl -tag -width Ds
 .It Fa name
 Feed name.
+.It Fa url
+URL of the feed.
 .El
 .It Fn merge "name" "oldfile" "newfile"
 Merge
@@ -121,13 +123,15 @@ Old file.
 .It Fa newfile
 New file.
 .El
-.It Fn order "name"
+.It Fn order "name" "url"
 Sort
 .Xr sfeed 5
 data from stdin and write it to stdout, its arguments are:
 .Bl -tag -width Ds
 .It Fa name
 Feed name.
+.It Fa url
+URL of the feed.
 .El
 .El
 .Sh EXAMPLES