Add an opener for `twitter:image:src' meta - plumb - Open certain URL patterns with an ad-hoc opener (plumber)
 (HTM) hg clone https://bitbucket.org/iamleot/plumb
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       ---
 (DIR) changeset 4d9d64f1e1d81f6701996b92db31e4a67c4dec95
 (DIR) parent 68c255d1528a091fe76e8b413a60855afcb513e1
 (HTM) Author: Leonardo Taccari <iamleot@gmail.com>
       Date:   Sun, 16 Dec 2018 17:37:47 
       
       Add an opener for `twitter:image:src' meta
       
       (This is used by ilmanifesto.it.)
       
       Diffstat:
        openers/twitterogimage |  8 ++++++++
        1 files changed, 8 insertions(+), 0 deletions(-)
       ---
       diff -r 68c255d1528a -r 4d9d64f1e1d8 openers/twitterogimage
       --- /dev/null   Thu Jan 01 00:00:00 1970 +0000
       +++ b/openers/twitterogimage    Sun Dec 16 17:37:47 2018 +0100
       @@ -0,0 +1,8 @@
       +#!/bin/sh
       +
       +for u in "$@"; do
       +       imgurl=$(curl -gs -L "$u" |
       +           xmllint --html --xpath 'string(//meta[@name="twitter:image:src"][1]/@content)' - 2>/dev/null |
       +           sed -e 's/\?.*$//' -e 's/:large$//' )
       +       plumb "${imgurl}"
       +done