Tricky question for a bash noob like me, but i'm sure this this easier that it seems to me.
I'm currently using the find command as follows :
run "find #{current_release}/migration/ -name '*.sql'| sort -n | xargs cat >#{current_release}/#{stamp}.sql"
in my capistrano recipe.
Problem is #{current_release}/migration/ contains subfolders, and I'd like the find command to include only one of these, depending on it's name (that I know, it's based on the target environment.
As a recap, folder structure is
Folder
|- sub1
|- sub2
and i'm trying to make a find specifying to recurse ONLY on sub1 for example. I'm sure this is possible, just couldn't find how.
Thanks.
Simply specify the directory you want as argument to find, e.g. find #{current_release}/migration/sub1 ....
EDIT: As per your clarification, you should use the -maxdepth argument for find, to limit the recursion depth. So, for example, you can use find firstdir firstdir/sub1 -maxdepth 1.
You just need to append that to your find invocation:
find #{current_release}/migration/sub_you_want -name ...
Depending on how you make the determination of the sub-directory you want, you should be able to script that as well.
Related
I have written a makefile which has pretty complicated dependency, and executes with multiple jobs in parallel (make -j100 for example). I am trying to find a way to print all the current running target names. Any idea? Thanks in advance.
If what you want is a kind of command that you can run from time to time while make is running, and that shows all currently executing recipes, you could slightly modify your recipes such that they first create a temporary file with the name of the target, do whatever they are supposed to do and delete the temporary file. Listing these temporary files anytime will then show you the currently executing recipes.
Example if all targets are located under the directory from which make is called (or sub-directories of it):
TAGSDIR := .tags
MKTAG = mkdir -p "$(TAGSDIR)/$(#D)" && touch "$(TAGSDIR)/$#"
RMTAG = rm -f "$(TAGSDIR)/$#"
<target>: <prerequisites>
#$(MKTAG)
<regular recipe>
#$(RMTAG)
And list all files under .tags to get the names of all currently running recipes. Example with find:
find .tags -type f -printf '%P\n'
You could even encapsulate this in an infinite loop and refresh the list e.g. every second:
while true; do clear; find -type f -printf '%P\n'; sleep 1; done
EDIT
Andreas noticed that this works only if the targets are all located under the directory from which make is called. If a target is ../foobar, for instance, the temporary tag file would be .tags/../foobar, which is not what we want.
Andreas suggests to substitute .. with \.\. and / with \/. We could maybe find a way to do something like this under GNU/Linux and macOS (but not exactly, you cannot have a slash in a file name) but there could still be other issues under Windows (C:, backslashes...).
We could also store the name of the target in a text file and use mktemp or an equivalent to generate the text file with a unique name. But we would then need a way to propagate this unique name from MKTAG to RMTAG. This is doable with a shell variable and a one-line recipe (or the .ONESHELL special target) but not very nice.
As you use GNU make we could also use abspath and create temporary files named $(TAGSDIR)/$(abspath $#) but I do not know what abspath does under Windows with drive letters, nor do I know if you can name a file something\c:\something under Windows...
So, if your targets are not all located under the directory from which make is called, the best is to use another solution.
I have a simple problem to which I don't find the answer on the net.
Like the title states it, I would like to go trough all the files in a directory AND his sub-directories. I know how to do it with find command but I would like to know how to do it with a simple for loop.
I initially have this line :
for file in $dir/*.png; do
And I'm sure there is a way to have some kind of $dir/*/*.png line that makes it possible with a for loop.
Thanks for your answers.
for file in $(find $dir - type f - name "*.png"); do
I have a rather interesting problem that I am trying to find the optimal solution for. I am creating an file autocompletion backend for Emacs. This means that I am using the linux find command to get files and directories.
The backend is given a file with a partially completed path (e.g. /usr/folder/foo) and I want to grab all files and directories that could match the partial path for two directories down (e.g. for example it could provide foo_bar/, foo_bar/bar, foo_bar/baz, foo_bar/bat/ foo_baz). So far I have only been to break this down into 3 steps
find all files in the current directory that may match the prefix
find foo* -type f -maxdepth 1
collect all possible directories we may want to look through
find foo* -type d -maxdepth 1
use each of those directories to make 2 more calls to find (I need to be able to differentiate between files and directories)
find foo_bar/ -type d -maxdepth 1
find foo_bar/ -type f -maxdepth 1
This solution involves a lot of calls to find (especially because the last step has to be called for every matching directory). This makes getting candidates slow, especially in large file systems. Ideally I would like to only make one call to get all the candidates. But I have not found a good way to do that. Does anyone know an optimal solution?
looking though the find manpage, I ended up using -printf.
find -L foo* -maxdepth 1 -printf '%p\t%y\n'
gives me everything I needed. only one command, differentiate between files and directories, search depth, etc.
I use find -name "nametofind" in cygwin to search for a file, but it does not give me any result, even when the file I want to search exists in the current directory. What am I doing wrong? Thanks.
As the comment mentioned more succinctly, you need to tell find which directory you want to search. If you it is the current directory, you should use ..
find . -name "nametofind"
It appears that the OP was trying to either match a partial file name or a file name with a different case. As #devnull mentioned in his comment, the correct solution for either case is to use the following.
find . -iname '*nametofind*'
I need a shell script that writes the tree structure (including all data in the folders) from a specific folder to a text/dat file.
So far I got this:
find . -type f|sed 's_\.\/__' > PATH/Input.dat
I dont want a "/" as the first char of the path.
This script works fine, but it returns ALL folder structures. I need something that returns only structures from a specific folder, like "Sales".
I need something that returns only structures from a specific folder,
like "Sales".
Specify the desired folder name. Say:
find Sales -type f | sed 's_\.\/__'
^^^^^
Saying find . ... would search in . (i.e. the current directory and subdirectories).
If you need to search more folders, say Purchase, specify those too:
find Sales Purchase -type f | sed 's_\.\/__'