slackchlog

atelszewski · 06-20-2015, 08:14 AM

Hi,

Below follows a script code I wrote to check for Slackware changelog changes.
It will display only the changed parts of the changelog (since the last time the script has been run).

Feel free to use

slackchlog:

Code:

#!/bin/sh

set -e

LOGCUR="$HOME/.slackware.ChangeLog.txt"
LOGTMP="$HOME/.slackware.ChangeLog.txt.tmp"
LOGOLD="$HOME/.slackware.ChangeLog.txt.old"

wget "ftp://ftp.osuosl.org/pub/slackware/slackware64-current/ChangeLog.txt" -O "$LOGTMP"

[ ! -e "$LOGCUR" ] && touch "$LOGCUR"
mv "$LOGCUR" "$LOGOLD"
mv "$LOGTMP" "$LOGCUR"

echo "ChangeLog:"
echo "============================"
OLINE="$(head -n1 "$LOGOLD")"
while read NLINE; do
  [ "$OLINE" = "$NLINE" ] && break
  echo "$NLINE"
done < "$LOGCUR"

--
Best regards,
Andrzej Telszewski

ttk · 06-20-2015, 11:02 AM

Love it! :-) Very neat and focused.

I have a similar thinger in my server's /etc/cron.daily which mails diffs. It uses perl, though, making it less desirable to some:

http://ciar.org/ttk/public/slacklog.pl.txt

atelszewski · 06-20-2015, 11:27 AM

Hi,

Initially I wanted to use 'diff' also but couldn't come with the idea how to do it.
And now I see it in your solution:

Code:

/usr/bin/diff -wiBaE $OLD_LOG $NEW_LOG 2>\&1 | /bin/grep '^>' | cut -b 3-

Nice.

--
Best regards,
Andrzej Telszewski

ttk · 06-20-2015, 12:19 PM

Thank Sylvain Robitaille :-) I'm pretty sure that line came from his bash script before I incorporated it into mine.

ponce · 06-20-2015, 12:25 PM

IMHO, I would consider also the -N option of wget, that downloads a file only if the timestamp is different from the one of the local copy (to be friendly versus the server hosting the changelog): note that this can't be used in combination with -O (see the man page) so if you decide to use it you might have to change the script a little...

atelszewski · 06-20-2015, 04:06 PM

Hi,

Quote:

I would consider also the -N option of wget

Done.

Also, now the script accepts Slackware version as the first argument, so you can check log for versions different than current. Code below.

Code:

#!/bin/sh

set -e

SLKVER=${1:-64-current}
LOGDIR="$HOME/.slackware.ChangeLog/$SLKVER"
LOGNEW="$LOGDIR/ChangeLog.txt"
LOGOLD="$LOGDIR/ChangeLog.txt.old"

mkdir -p "$LOGDIR"
[ ! -e "$LOGOLD" ] && touch "$LOGOLD"

wget -N -P "$LOGDIR" "ftp://ftp.osuosl.org/pub/slackware/slackware$SLKVER/ChangeLog.txt"

echo "ChangeLog:"
echo "============================"
diff -wiBaE "$LOGOLD" "$LOGNEW" | grep "^>" | cut -b 3-

cp "$LOGNEW" "$LOGOLD"

--
Best regards,
Andrzej Telszewski

Darth Vader · 06-20-2015, 04:13 PM

Quote:

Originally Posted by atelszewski

Hi,

Below follows a script code I wrote to check for Slackware changelog changes.
It will display only the changed parts of the changelog (since the last time the script has been run).

Feel free to use

slackchlog:

Code:

#!/bin/sh

set -e

LOGCUR="$HOME/.slackware.ChangeLog.txt"
LOGTMP="$HOME/.slackware.ChangeLog.txt.tmp"
LOGOLD="$HOME/.slackware.ChangeLog.txt.old"

wget "ftp://ftp.osuosl.org/pub/slackware/slackware64-current/ChangeLog.txt" -O "$LOGTMP"

[ ! -e "$LOGCUR" ] && touch "$LOGCUR"
mv "$LOGCUR" "$LOGOLD"
mv "$LOGTMP" "$LOGCUR"

echo "ChangeLog:"
echo "============================"
OLINE="$(head -n1 "$LOGOLD")"
while read NLINE; do
  [ "$OLINE" = "$NLINE" ] && break
  echo "$NLINE"
done < "$LOGCUR"

--
Best regards,
Andrzej Telszewski

I loved it! Really smart-ass!

ponce · 06-20-2015, 05:04 PM

I changed it slightly so there's no output in case the changelog doesn't change (maybe useful for putting it in crontab so you get a mail only if it changes)

Code:

#!/bin/sh

set -e

SLKVER=${1:-64-current}
LOGDIR="$HOME/.slackware.ChangeLog/$SLKVER"
LOGNEW="$LOGDIR/ChangeLog.txt"
LOGOLD="$LOGDIR/ChangeLog.txt.old"

mkdir -p "$LOGDIR"
[ ! -e "$LOGOLD" ] && touch "$LOGOLD"

wget -q -N -P "$LOGDIR" "ftp://ftp.osuosl.org/pub/slackware/slackware$SLKVER/ChangeLog.txt"

DIFF=$(diff -wiBaE "$LOGOLD" "$LOGNEW" | grep "^>" | cut -b 3-)

if [ "$DIFF" ]; then
        echo "slackware$SLKVER ChangeLog:"
        echo "+--------------------------+"
        echo "$DIFF"
        cp "$LOGNEW" "$LOGOLD"
fi

atelszewski · 06-20-2015, 05:41 PM

Hi,

I see it attracts attention.
Maybe Pat should include something like that in the next release if he sees many hits on the server?

--
Best regards,
Andrzej Telszewski

ahlr · 06-22-2015, 07:09 AM

Very good!

How to make a pop-up with the changelog?

ponce · 06-22-2015, 07:38 AM

hi ahlr,

I personally never tried (also because I don't use any icon tray), but I spotted this

http://slackbuilds.org/repository/14.1/desktop/sun/

atelszewski · 07-08-2015, 10:23 AM

Hi,

Quote:

I would consider also the -N option of wget

The "-N" option prevents fetching the changes as of Tue Jul 7 22:59:17 UTC 2015. Any idea why it is so?
wget simply says the file is up to date.

--
Best regards,
Andrzej Telszewski

atelszewski · 09-12-2015, 10:21 AM

Hi,

Quote:

Love it! :-) Very neat and focused.

Unfortunately this is no longer the truth

I spent some time and boiled something more complex

Quote from README:

Quote:

slackchlog is Slackware's ChangeLog viewer written in BASH.
It allows to download and view the remote ChangeLog file and
also to generate RSS feed suitable for RSS feed readers.
Using command line arguments, it's possible to specify
the architecture, release and mirror for the ChangeLog file
in question.

For usage details, type:
$ slackchlog --help

Help output:

Code:

Usage: /usr/bin/slackchlog [OPTIONS]

Options are:
  --text-diff-remote  Display textual diff between remote and local ChangeLog.
                      This is the default action.
  --text-diff-local   Display textual diff for local ChangeLog, that is,
                      the result of the most recent --text-diff-remote action.
  --rss-remote        Display remote ChangeLog in RSS format.
  --arch=ARCH         Slackware architecture (x86, x86_64, arm). Default: detect.
  --release=RELEASE   Slackware release (current, 14.1, etc.). Default: current.
  --timeout=TIMEOUT   Timeout (in seconds) for fetching the remote ChangeLog.
                      Default: 10 seconds.
  --cache-dir=DIR     Specify an alternative directory for storing ChangeLog's data.
                      Default: $HOME/.cache/slackware.ChangeLog.
  --mirror-file=FILE  Specify an alternative mirror list for remote ChangeLog.
                      Default: $HOME/.config/slackchlog.mirror.txt.
                      In the case where the default file does not exist and
                      alternative file is not specified, upstream URLs are used.
  --verbose           Be verbose (quiet by default).
  --help              Display this help message and exit.
  --version           Display version and exit.

Note:
  It is perfectly acceptable to specify the same option multiple times.
  In such case, the last one takes precedence

I think with all this functionality the script can fulfill the needs of:
- console users,
- crontab users,
- GUI users (provided that your feed reader supports external commad).

Please give the thing a try and let me know what you think.
From my point of view, it's feature complete, so I only accept bug fixes

Should you spot something erroneous, please let me know.
I'm planning to push it to SlackBuilds.org after initial reviews.

For now:
- source (md5: 46bcdcf32410e2345faf616afce1b31e)
- package (md5: 7545bde33add02cb70940c04fc850cd1)

Once the SlackBuild gets accepted on SBo, the package will be removed. [ACCEPTED, REMOVED]

Attached screen shot of slackchlog in action

--
Best regards,
Andrzej Telszewski

fogpipe · 09-12-2015, 04:13 PM

Quote:

Originally Posted by ttk

It uses perl, though, making it less desirable to some:

And more desirable to others

atelszewski · 09-13-2015, 06:05 AM

Hi,

Quote:

Originally Posted by fogpipe

And more desirable to others

The more I program in shell, the more I want to go to C/C++.

--
Best regards,
Andrzej Telszewski