This question already has answers here:
How to create directories recursively in ruby?
(6 answers)
Closed 8 years ago.
i have built this little app that generates a excel document. i am trying to make a directory to stick it in. these documents are built differently depending on the #agency that people select. so i made this method to return the path since the path is used in a few places.
def reportsheet_dir
file_path = "#{Rails.root}/public/reportsheets/#{#agency.downcase.gsub("_","")}"
end
At the beginning of the method that creates the document i have this method that supposedly builds directories but it doest seem to be working
Dir.mkdir(reportsheet_dir) unless File.exists?(reportsheet_dir)
I keep getting. this
and i get
Errno::ENOENT at /addons/agency_report_builders
No such file or directory -/Users/fortknokx/Work/toolkit/public/reportsheets/empowerlogicbuilder
I think its because its multiple levels deep?? since public/reportsheets/agency_name/file_name has to be made. i could just go and make the folders but i would like to just make the dir each time because new agencies could be made at any time. is this possible?
Have a look at FileUtils.mkdir_p()
http://ruby-doc.org/stdlib-1.9.3/libdoc/fileutils/rdoc/FileUtils.html#method-c-mkdir_p
It will recursively create non-existent directories. Dir.mkdir will not.
Related
This question already has an answer here:
How to set the current working directory in Dart?
(1 answer)
Closed 5 years ago.
I want to know what the current directory is. I don't want to shell out to run pwd. Is there an easy way to do this in Dart?
and also,
Is there a way, put name of directory into a string?
Re the current directory, from the documentation from the Directory class in dart:io (emphasis added).
In addition to being used as an instance to access the file system,
Directory has a number of static properties, such as systemTemp, which
gets the system's temporary directory, and the getter and setter
current, which you can use to access or change the current directory.
To get the name of a Directory as a string just use toString(), or perhaps the path property.
This question already has answers here:
How to read file from an imported library
(2 answers)
Closed 6 years ago.
Suppose the following files:
lib/src/program.dart
lib/src/file.txt
I want to read file.txt contents from program.dart using a library that contains readingFunction(path):
//program.dart
String fileContents = library.readingFunction("./file.txt");
This throws an error, because the current path is the one in which execution was launched (or the package path if executing with pub run).
How could I achieve the reading with relative path instead of being forced to use "./lib/src/file.txt" path?
Use the Resource package.
It allows you to read files that are embedded in packages. Files are specified with a special URL that looks like package:package_name/path/to/file.txt (same as used in import statements).
I am converting a VB6 application to VB.NET. In the code I am converting, it seems that the developer found the applications path two separate ways. However, it appears that he expects the two methods to produce different results.
Simple question:
What is the difference between calling these two lines of code:
strAppDataPath = CreateObject("Shell.Application").
NameSpace(ssfLOCALAPPDATA).Self.Path
and
strAppDataPath = App.Path
Explanation:
This is the code in question:
strAppDataPath = CreateObject("Shell.Application").
NameSpace(ssfLOCALAPPDATA).Self.Path
strAppDataPath = strAppDataPath & "\DataFolder\"
If (Not objFileSystem.FileExists(strAppDataPath & strAppDataFile)) Then
If (objFileSystem.FileExists(App.Path & strAppDataFile)) Then
...
End If
End If
The application's path is appended with \DataFolder\, and stored in the String strAppDatapath.
We check if the file strAppDataFile does not exist in strAppDatapath. Followed by checking if the file does exist in App.Path.
The concept behind what is going on makes sense to me: If the file doesn't exist in the subfolder, and if the file exists in App.Path, then do .... What I do not understand is why they didn't use one of the method for finding the application's path exclusively.
They don't point to the same path.
App.Path: Path where the currently executing EXE/DLL resides.
CreateObject("Shell.Application").NameSpace(ssfLOCALAPPDATA).Self.Path: Will point to the local (non-roaming) app data user folder. Same as the value in (user) environment variable LOCALAPPDATA.
Since Windows XP, the roaming & local app data paths are preferred places to store user settings and files (instead of the probably rights-restricted app folder).
So what the code does, is:
Look for strAppDataFile in %LOCALAPPDATA%\DataFolder\ (e.g. where "%LOCALAPPDATA%" could point to "C:\Users\UserName\AppData\Local\" on Windows Vista/7)
If not found, look for the same file in the application folder.
Please note that preferably applications should create an application specific sub-directory in local/roaming app data, e.g. use something like:
strAppDataPath = strAppDataPath & "\" & App.ProductName & "\DataFolder\"
' NOTE: Make sure to set the "Product Name" entry in the version information
' of the project settings
that could resolve to something like
"C:\Users\UserName\AppData\Local\My Application\DataFolder\"
My guess is that when the program is installed per-machine, a per-user location under LocalAppData is used. However during development or when installed per-user or as a portable application the application folder is used.
Some programmers use something like the code in question, while others make the decision by comparing App.Path against the ssfPROGRAMFILES path to determine the environment. The latter is probably preferable for a number of reasons but in the degenerate case where only one instance of the program exists on a machine they're equivalent.
I'm planning to do a program with Lua that will first of all read specific files
and get information from those files. So my first question is whats the "my documents" path name? I have searched a lot of places, but I'm unable to find anything. My second question is how can I use the first four letters of a file name to see which one is the newest made?
Finding the files in "my documents" then find the newest created file and read it.
The reading part shouldn't be a problem, but navigating to "my documents" and finding the newest created file in a folder.
For your first question, depends how robust you want your script to be. You could use Lua's builtin os.getenv() to get a variety of environment vars related to user, such as USERNAME, USERPROFILE, HOMEDRIVE, HOMEPATH. Example:
username = os.getenv('USERNAME')
dir = 'C:\\users\\' .. username .. '\\Documents'
For the second question, there is no builtin mechanism in Windows to have the file creation or modification timestamp as part of the filename. You could read the creation or modification timestamp, via a C extension you create or using an existing Lua library like lfs. Or you could read the contents of a folder and parse the filenames if they were named according to the pattern you mention. Again there is nothing built into Lua to do this, you would either use os.execute() or lfs or, again, your own C extension module, or combinations of these.
I wanted to make a generator that created files (and directories, etc...) based on already existing files in the app (for instance, the views or controllers). So if we had views set up like this
-app
-views
- layouts
- application.html.erb
- users
- index.html.erb
- show.html.erb
- etc ...
and I wanted to create files based on them I can do (with just ruby)
directories = Dir.entries("#{Rails.root}/app/views")
directories.each do |directory|
unless directory == "." or directory == ".."
files = Dir.entries("#{Rails.root}/app/views/#{directory}")
files.each do |file|
unless file == "." or file == ".."
text = File.read("#{Rails.root}/app/views/#{directory}/#{file}")
something #=> whatever else needs to go here to edit the file
something else #=> output_file.puts whatever
end
end
end
end
so this is basically what I would like to do with a generator so I can roll my code into a plugin and use it for other apps.
First question, how can I generate arbitrary files (with filenames based on existing filenames using the generator. Is it appropriate to cycle through the directories like I did above, grab the directory/file and generate files? Is there a way to do what I did using a simpler method (mine seems easily breakable).
Also, should I put all that read/format/write code inside the generator itself and just pass a string into the "initialize content" section of create_file or should I put it somewhere else. Or should I use the generator to create the bare files and populate it with an init script?
Is there a more rails type of way of populating generated files, or should I just shove all my formatting code inside the generator. If so, what is the appropriate way to approach this.
I am not sure if you want to know how generators are built in rails3 or not. The code you are showing is not very generator-like. In generators you can use all commands from Thor, which offers you a very powerful toolset of manipulating files, and injecting code (strings) into classes or files.
So I would most definitely fill your files inside a generator, because then it happens on user request, and the user can choose whether or not certain files need or can be overwritten or not.
Inside your gem, you will have a lib/generators folder, containing a templates folder, containing all files you might want to place inside the rails application.
From the Thor documentation, here is a nice example to construct files in a generator.
Hope this helps.
there's a simple API to use generators in Rails. here you can find a good guide:
http://guides.rubyonrails.org/generators.html
if you want to check some code:
https://github.com/coderloop/tamed_beast (I'm the author of its generators)
https://github.com/pilu/web-app-theme (another clean example)