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Archive for July 14th, 2021

windows – What is the proper way to test if a parameter is empty in a batch file? – Stack Overflow

Posted by jpluimers on 2021/07/14

You can use:
IF "%~1" == "" GOTO MyLabel
to strip the outer set of quotes. In general, this is a more reliable method than using square brackets because it will work even if the variable has spaces in it.

Source: [WayBack] jamesdlin answering on [WayBack] windows – What is the proper way to test if a parameter is empty in a batch file? – Stack Overflow

The tilde (~) strips out double quotes from the command as per

C:\>help for | findstr "~"
    %~I         - expands %I removing any surrounding quotes (")
    %~fI        - expands %I to a fully qualified path name
    %~dI        - expands %I to a drive letter only
    %~pI        - expands %I to a path only
    %~nI        - expands %I to a file name only
    %~xI        - expands %I to a file extension only
    %~sI        - expanded path contains short names only
    %~aI        - expands %I to file attributes of file
    %~tI        - expands %I to date/time of file
    %~zI        - expands %I to size of file
    %~$PATH:I   - searches the directories listed in the PATH
    %~dpI       - expands %I to a drive letter and path only
    %~nxI       - expands %I to a file name and extension only
    %~fsI       - expands %I to a full path name with short names only
    %~dp$PATH:I - searches the directories listed in the PATH
    %~ftzaI     - expands %I to a DIR like output line
values.  The %~ syntax is terminated by a valid FOR variable name.

–jeroen

Posted in Batch-Files, Development, Power User, Scripting, Software Development, Windows | Leave a Comment »

Space matching with sed is different from PCRE or other common regular expression parsers

Posted by jpluimers on 2021/07/14

On my research list: find out what is the cause of the difference below (Windows batch and Linux behave the same; just the quotes around the echo is different):

Windows statements:

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo failure with [:\s]*?
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"

Linux statements:

echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 "| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080"| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org "| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org"| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo failure with [:\s]*?
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 "| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080"| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org "| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
echo "cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org"| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"

Output:

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://plastic.example.org/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://plastic.example.org/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://plastic.example.org/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^: ]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://plastic.example.org/webui/repos/MyRepository/diff/changeset/2648

echo failure with [:\s]*?
failure with [:\s]*?

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080 | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://pla/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org:8080| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://pla/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org | sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://pla/webui/repos/MyRepository/diff/changeset/2648

echo cs:2648@rep:MyRepository@repserver:ssl://plastic.example.org| sed -E -r -n "s/^cs:(.*?)@rep:(.*?)@repserver:([a-zA-Z][a-zA-Z+.-]*?):\/\/(\w[^:\s]*?)(:\d*)?.*$/https:\/\/\4\/webui\/repos\/\2\/diff\/changeset\/\1/p"
https://pla/webui/repos/MyRepository/diff/changeset/2648

–jeroen

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Posted in Uncategorized | 1 Comment »

Some OmniThreadLibrary notes and links

Posted by jpluimers on 2021/07/14

For my link archive:

Repository: [WayBack] GitHub – gabr42/OmniThreadLibrary: A simple and powerful multithreading library for Delphi
My fork for pull requests: [WayBack] GitHub – jpluimers/OmniThreadLibrary: A simple and powerful multithreading library for Delphi
[WayBack] The Delphi Geek: OmniThreadLibrary internals – OtlTask
[WayBack] The Delphi Geek: OmniThreadLibrary internals – OtlComm
[WayBack] Documentation – The Ultimate Delphi Threading Library
[WayBack] Book: Parallel Programming with OmniThreadLibrary
- [WayBack] 2. Introduction to OmniThreadLibrary
- [WayBack] 3. High-level multi-threading: I needed the timed task, which you cannot name (it is always Timed Task.
  - [WayBack] 3. High-level multi-threading: 3.15 Timed Task
- [WayBack] 4. Low-level multi-threading
- [WayBack] 5. Synchronization
- [WayBack] 6. Miscellaneous
- [WayBack] 7. How-to
- [WayBack] A. Units
- [WayBack] B. Demo applications
- [WayBack] C. Examples
- [WayBack] D. Hooking into OmniThreadLibrary
- [WayBack] E. ForEach internals
[WayBack] The Delphi Geek: Parallel Programming with OmniThreadLibrary – the book is here!

IOmniTimedTask and the `Timed task` name

You create a reference like this:

  TimedTask := Parallel.TimedTask.Execute(
    procedure(const task: IOmniTask)
    begin
      // ...
    end);

In the background, Parallel.TimedTask calls TOmniTimedTask.Create() which calls CreateTask(TOmniTimedTaskWorker.Create(), 'Timed task').Unobserved.Run

The problem is that TOmniTimedTaskWorker is private to the OtlParallel unit, which means you cannot take that call out without also copying that class.

There might be a workaround which I need to research based on the Apply method of IOmniTaskConfig, maybe through Parallel.ApplyConfig. These links might help:

–jeroen

Read the rest of this entry »

Posted in Delphi, Development, Multi-Threading / Concurrency, Software Development | Leave a Comment »

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

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Archive for July 14th, 2021

windows – What is the proper way to test if a parameter is empty in a batch file? – Stack Overflow

Space matching with sed is different from PCRE or other common regular expression parsers

Some OmniThreadLibrary notes and links

IOmniTimedTask and the `Timed task` name

The Wiert Corner – irregular stream of stuff

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

Subscribe

Archives

Recent Comments

Recent Posts

Blog Stats

Meta title

Tag Cloud Title

Top Clicks

Top Posts

My badges

Twitter Updates

My Flickr Stream

Pages

All categories

Email Subscription

Archive for July 14th, 2021

windows – What is the proper way to test if a parameter is empty in a batch file? – Stack Overflow

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Space matching with sed is different from PCRE or other common regular expression parsers

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Some OmniThreadLibrary notes and links

IOmniTimedTask and the Timed task name

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Like this:

IOmniTimedTask and the `Timed task` name