how to update existing files when creating a project

[mgaitan]

Hi, I'm new with copier and I'm very glad to have found such a good tool.

I'm trying to use it to generate new subpackages inside a project that already exists, while also update some existing files.

For instance, my template currently is like this

📁 my_copier_template 
├── 📄 copier.yml
├── 📁 existing_package/
│    └── 📁  {{ subpackage_name }}
│            └── 📄 {{ module_name }}.py

and I got the subpackage in my existing package

├── 📁 existing_package/
│    └── 📄 existing_module.py
│    └── 📁  existing_subpackage1
│    └── 📁  <subpackage_name>
│            └── 📄 <module_name>.py

But now I want to update also existing_module.py, for instance to append something after a comment that matches a regex pattern.

Is that possible?

[yajo]

Sounds like you want some custom behavior. Try using tasks. https://copier.readthedocs.io/en/stable/configuring/#tasks El vie., 20 may. 2022 21:01, Martín Gaitán ***@***.***> escribió:

…

Hi, I'm new with copier and I'm very glad to have found such a good tool. I'm trying to use it to generate new subpackages inside a project that already exists, while also update some existing files. For instance, my template currently is like this 📁 my_copier_template ├── 📄 copier.yml ├── 📁 existing_package/ │ └── 📁 {{ subpackage_name }} │ └── 📄 {{ module_name }}.py and I got the subpackage in my existing package ├── 📁 existing_package/ │ └── 📄 existing_module.py │ └── 📁 existing_subpackage1 │ └── 📁 <subpackage_name> │ └── 📄 <module_name>.py But now I want to update also existing_module.py, for instance to append something after a comment that matches a regex pattern. Is that possible? — Reply to this email directly, view it on GitHub <#670>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHNXDJZEPQJV3ZWYQVZICLVK7VPXANCNFSM5WQN5L6A> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[mgaitan]

I've implemented a script that works for a very basic use case: when I need to append a new content to my

• Create a file after-edit.py in the root of the template (beside copier.yaml)

from pathlib import Path
from copier.tools import Style, printf

printf("Running after edit script")
for to_append in Path('.').glob('**/*.append'):
    text_to_append = to_append.read_text()
    target = Path(str(to_append).rstrip(".append"))
    printf("Appended into", target, style=Style.WARNING)

    target.write_text(target.read_text() + text_to_append)
    to_append.unlink()
Path("after-edit.py").unlink()

• Add a file existing_package/existing_module.py.append.jinja to create the content to append
• Include the task in the config file

 _tasks:
  - ["{{ _copier_python }}", after-edit.py] 

PS: I'm wondering if I could run the script without copying it to the target folder (and then self-deleting it from the script's last line).

[yajo]

About your last question, see how it's done for migrations here: https://github.com/Tecnativa/doodba-copier-template/blob/11e31c188084449f99dca38de739a4b25fe0c9db/copier.yml#L47