I'm trying to write a bash script to iterate through a directory and run a command on every .py file to upload each to a different location based on its filename. [EDIT] - in the path/to/upload/$f, the $f needs to be the name of the file (without the extension)

I'm sure I'm miles off but might it look something like this:

cd /home/user/stuff

for f in $(find . -name '*.py') 
do yes yes | [command] path/to/upload/$f 
done

except here the whole path gets assigned to $f

the directory looks like:

├── zero
│   ├── ein
│   │   └── ein.py
├── one
│   ├── ban
│   │   └── ban.py
│   ├── deep
│   │   └── deep.py

etc...

So the first iteration would go [command] path/to/upload/ein

CodePudding user response：

Replace your line

for f in $(find . -name '*.py') 

with

for f in $(find . | sort -r | grep "/${input}" | grep '.py$' )

This way, you will iterate on all python under ${input}.

I like to use "sort -r" as a visual prompt that I am working down to the start of the list. :-)

CodePudding user response：

If you've got Bash 4.0 (released in 2009) or later then you can use:

#! /bin/bash -p

shopt -s dotglob globstar nullglob
for f in **/*.py; do
    yes yes | [command] "path/to/upload/${f##*/}"
done

• shopt -s ... enables some Bash settings that are required by the code:
  • dotglob enables globs to match files and directories that begin with .. find shows such files by default.
  • globstar enables the use of ** to match paths recursively through directory trees.
  • nullglob makes globs expand to nothing when nothing matches (otherwise they expand to the glob pattern itself, which is almost never useful in programs).
• ${f##*/} expands to the value of $f with everything up to and including the last / character removed. See Removing part of a string (BashFAQ/100 (How do I do string manipulation in bash?)).

If you are stuck with an older version of Bash (e.g. on macOS) then another option is:

find . -name '*.py' -print0 \
    |   while IFS= read -r -d '' f; do
            yes yes | [command] "path/to/upload/${f##*/}"
        done

• See BashFAQ/001 (How can I read a file (data stream, variable) line-by-line (and/or field-by-field)?) for an explanation of find ... -print0 | while IFS= read -r -d '' .... See Bash Pitfalls #1 (for f in $(ls *.mp3)) for an explanation of why commonly-seen shell code for processing the output of find is broken.