The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Software Development’ Category

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Modifying openssl to build on Mac without makedepend: using cc -M/gcc -M/clang -M

Posted by jpluimers on 2016/09/08

Coping with OpenSSL is frustrating on so many levels. It would be hilarious if not so many depended on it.

The main thing is that there is so much cruft in openssl but nobody seemingly to care enough about copying with that cruft. Though the intentions of the LibreSSL are great and it has far left cruft, it didn’t gain enough ground in the 2+ years it exists.

For me, the biggest problem was that OpenSSL would fail to build on “modern” OS X versions. These lack makedepend which was part of OS X, but got removed somewhere between 2006 and 8.0 in 2012. Luckily, the 2006 post also mentions the alternative: gcc -M.

Actually cc -M or clang -M work just as well as cc symlinks to clang and gcc calls clang with some parameters.

OpenSSL references makedepend in a lot of Makefiles (see list below). The good part is that config and Configure modify the Makefiles so most people use a manual workaround after running Configure or revert to a macports built or other binaries of makedepend or a homebrew formula.

That is not really an automated solution suitable for general use, let alone suitable for Continuous Integration, so I dug a bit deeper: config is a shell script and Configure is a sherl script: a cleverly crafted shell script starting with the below line invoking Perl with the rest of the script. The reason is that #! shebangs need an absolute location which for Perl can vary. A nice discussion on this trick is at Running Under Some Shell which contains a more elaborate how this works:

Read the rest of this entry »

Posted in bash, Development, Makefile, Perl, Scripting, Software Development | Leave a Comment »

“Yes/No” question with what kind of buttons? Indeed “Yes/Cancel” SourceTree for Windows installer – latest version.

Posted by jpluimers on 2016/09/07

Yes, people still do this: Screenshot 2016-09-07 15.59.24.png

This one is worse than the usual “Yes/No” questions missing one or more of the “Yes” or “No” buttons in that it actually mentions you can click “No”.

Load SSH Key?

Do you have an SSH kkey that you’d like to load now? If not you can click “No” and create one later if you like”.

Posted in DVCS - Distributed Version Control, git, Mercurial/Hg, Software Development, SourceTree | Leave a Comment »

sql – Oracle to_date() to parse input to datetime values – via Stack Overflow

Posted by jpluimers on 2016/09/07

The Oracle to_date() function has saved me numerous times parsing date time strings into datetime values like this:

to_date('29/07/2015 13:18:00', 'DD/MM/YYYY HH24:MI:SS')

One gotcha is that when you query back the resulting date-time values, they might be formatted differently because of NLS_DATE_FORMAT settings

In addition to the query for ‘nls_date_format’ mentioned in sql – Oracle to_date() incorrect output – Stack Overflow, I usually use this one:

select v.*
from v$parameter v
where name like 'nls_%'
order by lower(v.name)
;

–jeroen

Posted in Database Development, Development, OracleDB, Software Development | Leave a Comment »

Delphi version info table: C# Builder, Delphi 8 through 10.3 Rio and Appbuilder

Posted by jpluimers on 2016/09/06

I’ve published the Delphi version info table as a Gist: https://gist.github.com/jpluimers/b5891600b73642788b492393710c6070.

Note I need help with these:

The updated script that forms the base of this table is here: https://bitbucket.org/jeroenp/wiert.me/src/tip/Native/Delphi/Scripts/List-Delphi-Installed-Packages.ps1

You can pass any of these args to get information

  • Individual columns:
    • CompanyNames, Versions, ProductNames, ProductVersions, BetaNames. ReleaseDates, Architectures, CharacterSets, Defines, CompilerVersions, RTLVersions, DllSuffixes, ProjectVersions, Frameworks, ProductVersions, ProductFullNames, BaseKeyPaths, HKCU-BaseKeyPaths, HKLM-BaseKeyPaths
  • Base of the below table:
    • ProductSummaries
  • Installed info (installation status obtained through the registry):
    • InstalledProductVersions, InstalledProductFullNames, InstalledProductSummaries, InstalledPackages

An elaborate wrapper around the Define column is jedi.inc which is used in many projects (both open source and closed source) to distinguish between various Delphi versions, libraries and platforms at compile time (URL: github.com/project-jedi/jedi/blob/master/jedi.inc)

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Posted in .NET, C#, C# Builder, Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | 5 Comments »

A bash script to btrfs snapshot details like disk sizes (requires btrfs quota to be enabled)

Posted by jpluimers on 2016/09/06

One thing I’ve not figured out yet is this: How does enabling btrfs quotas impact the system? – Unix & Linux Stack Exchange

My gut feeling says it’s not much. But if someone knows: please chime in.

Anyway: btrfs quota support helps you to see how big snapshots (and other subvolumes) are.

Enabling and disabling is easy (the slash is the path from where to enable quota):

btrfs quota enable /

btrfs quota disable /

The bad thing is that there is no command that gives just the quota status. You have to revert to btrfs qgroup show /

This will show you quota groups when quota are enabled:

qgroupid         rfer         excl 
--------         ----         ---- 
0/5          16.00KiB     16.00KiB

or errors when quota are disabled either of these two errors:

# btrfs qgroup show /
ERROR: can't perform the search - No such file or directory
ERROR: can't list qgroups: No such file or directory

# btrfs qgroup show /
ERROR: can't list qgroups: quotas not enabled

You might also want to check the syslogs as there was a [PATCH 1/2] btrfs: syslog when quota is enabled.

The btrfs qgroup output is the base for agronick/btrfs-size: A script that will print out a list of BTRFS subvolumes along with their size in megabytes and their name.

It actually shows it in human readable form (kilo/mega/giga/… bytes) and is documented at Get the size of your BTRFS Snapshots | PoisonPacket. It gives me a nice overview that corresponds to the snapper list output (see below).

The script has two drawbacks:

./btrfs-size/btrfs-size.sh: line 55: can't + 0: syntax error: invalid arithmetic operator (error token is "'t + 0")

  • it can take a while for btrfs quota enable / to actually deliver the quota for all the qgroupid values snapper uses. Until that time, the columns ID/Total/Exclusive Data are empty.
  • it won’t warn you if the quota data is out of data; to check that, run the below script

# btrfs qgroup show / > /dev/null
WARNING: Qgroup data inconsistent, rescan recommended

In that case, run btrfs quota rescan / and wait for it to complete by running this command until the warning is gone:

# btrfs qgroup show / > /dev/null
WARNING: Rescan is running, qgroup data may be incorrect

If the warning reverts to WARNING: Qgroup data inconsistent, rescan recommended then you might see the effects from this bug and should not worry about it: Bug 933428 – btrfs qgroup – allways shows WARNING: Qgroup data inconsistent.

For more btrfs quota background information, see: UseCases – btrfs Wiki.

–jeroen

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Posted in *nix, *nix-tools, bash, Development, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux, Tumbleweed | 1 Comment »

installing the UTF-8 encoding ftfy (fixes text for you) – via version 3.0 | Luminoso Blog

Posted by jpluimers on 2016/09/06

Simple if you know it:

pip install ftfy

That installs it as a command which is a lot easier than using it from Github at [Wayback] https://github.com/LuminosoInsight/python-ftfy

It knows how to solve the encoding issues in [Archive.is]  the future of publishing at W3C explaining about WTF-8 and Unicode history.

It didn’t solve my non-Unicode encoding issue: [Wayback] “v3/43/4r” -> “v¾¾r” -> “vóór”.

Read the rest of this entry »

Posted in Development, Encoding, ftfy, Mojibake, Software Development, Unicode, UTF-8, UTF8 | 4 Comments »

Delphi Bootcamp live streams (will edit this over time).

Posted by jpluimers on 2016/09/05

Delphi Boot Camp with 100% off Delphi

Day 1: https://www.youtube.com/watch?v=-YUMUHh7Wpw Introduction to Delphi: The IDE and Your First App (FireMonkey app) – edited https://www.youtube.com/watch?v=2rwaQN_O3bU

Day 2: Getting to Know the Delphi Language – edited https://www.youtube.com/watch?v=CqlHeBPKu-0 

Day 3: https://www.youtube.com/watch?v=JyiuOz_zMXA Building Effective User Interfaces in FireMonkey – edited https://www.youtube.com/watch?v=gnsppAa5MxA

Day 4: https://www.youtube.com/watch?v=JyiuOz_zMXA Game Development with Delphi – edited

Day 5:

Day 4:

Day 3: edited

Day 3:

Day 2: edited

 

Day 1: edited

Day 1:

 

 

 

 

Posted in Delphi, Delphi 10.1 Berlin (BigBen), Development, Software Development | Leave a Comment »

tf: show changeset details on the console

Posted by jpluimers on 2016/09/02

By default the changeset command in tf.exe shows a dialog showing a list of all files in that changeset.
I wanted that list to be dumped on the console for further processing.

Luckily there is a /noprompt option for that:

call "%~dp0tf.bat" changeset /noprompt %*

The above tf-show-changeset-details-on-console.bat batch file uses tf.bat that hunts for the location of tf.exe.

–jeroen

Posted in .NET, Development, Software Development, Source Code Management, TFS (Team Foundation System) | Leave a Comment »

Delphi: Alt+Down Arrow is the keyboard shortcut for ellipsis buttons

Posted by jpluimers on 2016/09/01

Thanks Primož Gabrijelčič for reminding me on Stack Overflow that Alt + Down opens the dialogs behind ellipsis buttons in the Delphi IDE.

It’s the CUA and Windows short-cut to open drop-down lists (comboboxes) and for opening drop-down list for a property in the object inspector, but I never realised also would work for these ellipsis buttons.

This was my original stack-overflow question: Is there a keyboard shortcut for the ellipsis buttons of the Project Options in the Delphi IDE?

The Project Options in the Delphi IDE has a few option (like the Search Path) each with an ellipsis button (the one on the right having only three dots ... in the image below) to pop-up a dialog.

What keyboard shortcut activates that button?

Project Options with ellipsis button

–jeroen

Via: Object Inspector Keyboard Shortcuts – RAD Studio

Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi x64, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Keyboards and Keyboard Shortcuts, Software Development | Leave a Comment »

Mercurial/Hg; syntax/tips for amend commit adding/reming files to latest (non-pushed) commit

Posted by jpluimers on 2016/09/01

Sometimes your latest commit isn’t what you intended. Fixing can be done, but isn’t always obvious hence these links:

Remove a new file from a commit:

cp somefile.txt somefile.txt.bak
hg forget somefile.txt
hg commit --amend

If the file was new (i.e. you had used hg add).

If that file already existed try:

cp somefile.txt somefile.txt.bak
hg revert somefile.txt --rev .~1
hg commit --amend
cp somefile.txt.bak somefile.txt

–jeroen

Posted in Development, DVCS - Distributed Version Control, Mercurial/Hg, Software Development, Source Code Management | Leave a Comment »

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