I have a very simply (maybee very stupid) question regarding the Windows 7 (Path)-Variables.
Until Windows 10 the Gui looks very ugly und uncomfortable (short Textboxes for large Inputs) I Use custom variables to short down my view.
For example:
envi -->C:\Program Files (x86)\MiKTeX 2.9\miktex\bin;C:\Program Files (x86)\Skype\Phone\;C:\Program Files\TortoiseSVN\bin;
So I can use it in path like this:
path -->"[...];%envi%;"
Now I tried to do the same with the default settet part end extract the following:
sys --> %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SystemRoot%\System32\WindowsPowerShell\v1.0\;
But THAT does not work:
path --> ;%sys%; %envi%; [...]
even if I type "echon %sys%" it seems ok. But if I type "echo %path% it will resolve every variable instead of %sys%.
Now my question:
Is that impossible coursed by nested variables (%sys% contains %SystemRoot%?)
Or may there be another problem?
Greatings Oekel
Related
I'm trying to use Atom to run a Lua script. However, when I try to load files via the require() command, it always says it's unable to locate them. The files are all in the same folder. For example, to load utils.lua I have tried
require 'utils'
require 'utils.lua'
require 'D:\Users\Mike\Dropbox\Lua Modeling\utils.lua'
require 'D:\\Users\\Mike\\Dropbox\\Lua Modeling\\utils.lua'
require 'D:/Users/Mike/Dropbox/Lua Modeling/utils.lua'
I get errors like
Lua: D:\Users\Mike\Dropbox\Lua Modeling\main.lua:12: module 'D:\Users\Mike\Dropbox\Lua Modeling\utils.lua' not found:
no field package.preload['D:\Users\Mike\Dropbox\Lua Modeling\utils.lua']
no file '.\D:\Users\Mike\Dropbox\Lua Modeling\utils\lua.lua'
no file 'D:\Program Files (x86)\Lua\5.1\lua\D:\Users\Mike\Dropbox\Lua Modeling\utils\lua.lua'
no file 'D:\Program Files (x86)\Lua\5.1\lua\D:\Users\Mike\Dropbox\Lua Modeling\utils\lua\init.lua'
no file 'D:\Program Files (x86)\Lua\5.1\D:\Users\Mike\Dropbox\Lua Modeling\utils\lua.lua'
The messages says on the first line that 'D:\Users\Mike\Dropbox\Lua Modeling\utils.lua' was not found, even though that is the full path of the file. What am I doing wrong?
Thanks.
The short answer
You should be able to load utils.lua by using the following code:
require("utils")
And by starting your program from the directory that utils.lua is in:
cd "D:\Users\Mike\Dropbox\Lua Modeling"
lua main.lua
The long answer
To understand what is going wrong here, it is helpful to know a little bit about how require works. The first thing that require does is to search for the module in the module path. From Programming in Lua chapter 8.1:
The path used by require is a little different from typical paths. Most programs use paths as a list of directories wherein to search for a given file. However, ANSI C (the abstract platform where Lua runs) does not have the concept of directories. Therefore, the path used by require is a list of patterns, each of them specifying an alternative way to transform a virtual file name (the argument to require) into a real file name. More specifically, each component in the path is a file name containing optional interrogation marks. For each component, require replaces each ? by the virtual file name and checks whether there is a file with that name; if not, it goes to the next component. The components in a path are separated by semicolons (a character seldom used for file names in most operating systems). For instance, if the path is
?;?.lua;c:\windows\?;/usr/local/lua/?/?.lua
then the call require"lili" will try to open the following files:
lili
lili.lua
c:\windows\lili
/usr/local/lua/lili/lili.lua
Judging from your error message, your Lua path seems to be the following:
.\?.lua;D:\Program Files (x86)\Lua\5.1\lua\?.lua;D:\Program Files (x86)\Lua\5.1\lua\?\init.lua;D:\Program Files (x86)\Lua\5.1\?.lua
To make that easier to read, here are each the patterns separated by line breaks:
.\?.lua
D:\Program Files (x86)\Lua\5.1\lua\?.lua
D:\Program Files (x86)\Lua\5.1\lua\?\init.lua
D:\Program Files (x86)\Lua\5.1\?.lua
From this list you can see that when calling require
Lua fills in the .lua extension for you
Lua fills in the rest of the file path for you
In other words, you should just specify the module name, like this:
require("utils")
Now, Lua also needs to know where the utils.lua file is. The easiest way is to run your program from the D:\Users\Mike\Dropbox\Lua Modeling folder. This means that when you run require("utils"), Lua will expand the first pattern .\?.lua into .\utils.lua, and when it checks that path it will find the utils.lua file in the current directory.
In other words, running your program like this should work:
cd "D:\Users\Mike\Dropbox\Lua Modeling"
lua main.lua
An alternative
If you can't (or don't want to) change your working directory to run the program, you can use the LUA_PATH environment variable to add new patterns to the path that require uses to search for modules.
set LUA_PATH=D:\Users\Mike\Dropbox\Lua Modeling\?.lua;%LUA_PATH%;
lua "D:\Users\Mike\Dropbox\Lua Modeling\main.lua"
There is a slight trick to this. If the LUA_PATH environment variable already exists, then this will add your project's folder to the start of it. If LUA_PATH doesn't exist, this will add ;; to the end, which Lua fills in with the default path.
I'm using Lua in interactive mode on a Mac (thanks to rudix.org).
When I want to load a file I do:
dofile("/my/long/path/to/my/directory/file.lua")
I want to do a different thing, that is:
put all my files in a desktop directory myDirectory;
then call the file from the terminal this way dofile("file.lua");
Is this possible? How?
If the path is fixed, you can just redefine dofile:
local _dofile=dofile
local path=("/my/long/path/to/my/directory/")
function dofile(x)
return _dofile(path..x)
end
You may put this (and other initializations) in a file and set the environment variable LUA_INIT to its location. After this, every invocation of lua will see the version of dofile redefined above and the users will be able to say simply dofile("foo.lua").
Alternatively, you can use require, which looks for modules in a list of paths in package.path or LUA_PATH.
Maybe this can be a silly question but I don't figure out how to search in google why in some code I read, it is used to write this way: \\progra~1
What does ~ and 1 mean?
I tried executing in Windows Run the same path but changing numbers and these are the results:
C:\progra~1 -> Opens Program Files
C:\progra~2 -> Opens Program Files(x86)
C:\progra~3 -> Opens ProgramData
C:\progra~4 -> Opens ProgramDevices, a folder I created in C:\
Why? Is this like a Match or something in the Folder names list?
For example a regex like "progra" and then to show the ~1 (First) match in some X order or ~2 (Second) ... etc?
It's a compatability mode with the old (really old) windows 8.3 naming convention. The ~n represents the instance of the name that has the same root characters.
In your example:
Program Files and Program Files(x86) have the same root characters Progra.
Hence one gets progra~1, the next progra~2 etc.
8.3 compatability can be turned off for a disk partition.
Exactly, it's a pattern counter.
Check out also this answer: What does %~d0 mean in a Windows batch file?
You can find more examples of different variables with modifiers here:
https://technet.microsoft.com/en-us/library/bb490909.aspx
(ctrl-f for "Variable substitution")
Right now I have a batch file that sets the PATH variable to all of the required directories.(there is actually a bunch more required directories, i just took them out so the code snippet would not be too long)
#echo off
set PATH=D:/src/trunk/build/bin;D:/src/trunk/build/bin/CoreTools;D:/src/trunk/build/bin/Plugins/Extensions;D:/src/trunk/build/bin/Plugins/CustomUI
set DEBRIEF_INSTALL_DIR=D:/src/trunk/DebriefSuite/D3D_Installation
set READERS=D:/src/trunk/build/bin/CoreTools/Readers
set BINARY_DIR=D:/src/trunk/build
cd D:/src/trunk/build/bin
start PROGRAM.exe --ConfigFile="D:/src/trunk/DebriefSuite/Installation/config/Projects/config.xml" ^
--Mode-File="D:/src/trunk/DebriefSuite/Installation/config/Projects/Common/anotherconfig.xml" ^
--Env:Bin="D:/src/trunk/build/bin"
cd D:/src/trunk
It works fine, but all of the directories are hard-coded. This needs to be able to work for other computers that might have their root directory in a different location. I need to be able to pass in a root directory (something like "D:\different_root_location") and substitute it in to each place in this code that currently says "D:\src\trunk". The problem is, i am not sure what the syntax would be for something like this. I am new to writing batch files. I tried doing something like
SET ROOTDIR=%1 .....
And then
set PATH=%ROOTDIR%/build/bin;%ROOTDIR%/build/bin/CoreTools;%ROOTDIR%/build/bin/Plugins/Extensions;%ROOTDIR%/build/bin/Plugins/CustomUI ..........
start PROGRAM.exe --ConfigFile="%ROOTDIR%/DebriefSuite/Installation/config/Projects/config.xml" ^
but it did not work. I'm not really sure how to make this work! Also, any links to good sources of information about writing batch files in general would be extremely helpful since i am starting out!
Change your line so it includes the original path as well.
From this:
set PATH=D:/src/trunk/build/bin...
to this: (and Windows uses \ and not / even though it works in some cases)
set PATH=%path%;D:\src\trunk\build\bin....
I've recently started using ctags on my projects. I currently have the following setup:
root/tags [contains all non-static tags]
root/foo/tags [contains static tags for the foo directory]
root/bar/tags [static]
root/something/else/tags [etc.]
...
I can set tags=./tags,tags,/path/to/root/tags and everything works perfectly.
However, my problem is that I work on several projects at once, so I have, for example, /path/to/root1, /path/to/root2, and /path/to/root3 all at once. I'd rather not manually set the tags each time I open a file; is there any way I can have tags to to the /path/to/rootX based on the file I'm editting? (i.e., if I'm editing /path/to/root3/foo/x.c, use the tags in root3/tags?
In my case, all of my projects share a common parent directory; what I really want is something like:
set tags=./tags,tags,substitute("%:p:h", "\(^\/path\/to\/.*/\).*$", "\1", "")
but I can't seem to get the right vimfu to make it work.
EDIT: I just realized that this won't work; I can't actually write to root*. Instead, I'd like to store my main ctags file in ~/ctags/root*/tags, where there's a 1:1 mapping between the subdirectories of ~/ctags/ and /path/to/ [For those who may be wondering, these are ClearCase UCM dynamic views; neither /view/XXX/ nor /view/XXX/vobs/ is writable]
If what you want is:
set tags=./tags,tags,substitute("%:p:h", "\(^\/path\/to\/.*/\).*$", "\1", "")
Try:
let &tags = './tags,tags,' . substitute(expand("%:p:h"), "\(^\/path\/to\/.*/\).*$", "\1", "")
There's no expansion in a :set command. Also, "%:p:h" won't be expanded automatically, so use expand(). See:
:help :let-option
:help expand()