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README: newsboat sqlite3 export script: improvements 

- Export read/unread state to a separate plain-text "urls" file, line by line.

- Handle white-space control-chars better.

From the sfeed(1) man page:

"    The fields: title, id, author are not allowed to have newlines and TABs,
     all whitespace characters are replaced by a single space character.
     Control characters are removed."

So do the reverse for newsboat aswell: change white-space characters which are
also control-characters (such as TABs and newlines) to a single space
character.
This commit is contained in:
Hiltjo Posthuma 2021-01-15 18:31:52 +01:00
parent f18f4818ed
commit 7feab0fd88
1 changed files with 22 additions and 9 deletions
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@ -628,10 +628,12 @@ sfeedrc file and change the curl options "-L --max-redirs 0".
Shellscript to export existing newsboat cached items from sqlite3 to the sfeed
TSV format.
#!/bin/sh
# Export newsbeuter/newsboat cached items from sqlite3 to the sfeed TSV format.
# The data is split per file per feed with the name of the newsboat title/url.
# It writes the urls of the read items line by line to a "urls" file.
#
# Dependencies: sqlite3, awk.
#
# Usage: create some directory to store the feeds, run this script.
@ -653,8 +655,8 @@ TSV format.
SELECT
i.pubDate, i.title, i.url, i.content, i.guid, i.author,
i.enclosure_url,
f.rssurl AS rssurl, f.title AS feedtitle --,
-- i.id, i.unread, i.enclosure_type, i.enqueued, i.flags, i.deleted,
f.rssurl AS rssurl, f.title AS feedtitle, i.unread --,
-- i.id, i.enclosure_type, i.enqueued, i.flags, i.deleted,
-- i.base
FROM rss_feed f
INNER JOIN rss_item i ON i.feedurl = f.rssurl
@ -668,13 +670,19 @@ TSV format.
FS = "\x1f";
RS = "\x1e";
}
# strip all control-chars for normal fields.
function strip(s) {
# normal non-content fields.
function field(s) {
gsub("^[[:space:]]*", "", s);
gsub("[[:space:]]*$", "", s);
gsub("[[:space:]]", " ", s);
gsub("[[:cntrl:]]", "", s);
return s;
}
# escape chars in content field.
function escape(s) {
# content field.
function content(s) {
gsub("^[[:space:]]*", "", s);
gsub("[[:space:]]*$", "", s);
# escape chars in content field.
gsub("\\\\", "\\\\", s);
gsub("\n", "\\n", s);
gsub("\t", "\\t", s);
@ -690,9 +698,14 @@ TSV format.
print "Writing file: \"" fname "\" (title: " $9 ", url: " $8 ")" > "/dev/stderr";
}
print $1 "\t" strip($2) "\t" strip($3) "\t" escape($4) "\t" \
"html" "\t" strip($5) "\t" strip($6) "\t" strip($7) \
print $1 "\t" field($2) "\t" field($3) "\t" content($4) "\t" \
"html" "\t" field($5) "\t" field($6) "\t" field($7) \
> fname;
# write urls of the read items to a file line by line.
if ($10 == "0") {
print $3 > "urls";
}
}'