@Marvin I am trying to read the flow code from a private GITLAB (not the github) repository wih oath2 enables account. Could you tell me what is meant by "access_token" precisely in the code snippet below (it is taken from this link from prefect documents ): # load_from_storage.py from prefect import flow from prefect.runner.storage import GitRepository from prefect.blocks.system import Secret my_flow = flow.from_source( source=GitRepository( url="https://github.com/org/private-repo.git", branch="dev", credentials={ "*access_token*": Secret.load("github-access-token").get() } ), entrypoint="flows.py:my_flow" ) if name == "__main__": my_flow()

The

access_token

in the code snippet you provided represents the personal access token (PAT), which is used to authenticate with GitLab or GitHub. Such tokens are generally used to access the API and perform actions on behalf of a user or an application without using a password. When you see

*access_token*

within the

credentials

dictionary, it is expected to be replaced with the actual key used by the GitRepository class to read the token from the credentials provided. The

Secret.load("github-access-token").get()

part fetches the token from a

Secret

block that stores sensitive information, such as your personal access token, securely. Since the documentation is generally for public repositories like GitHub, the access token key might differ for a GitLab repository. You would need to check the specific

GitRepository

class implementation for GitLab to know the exact key you should use. Moreover, the URL in the

source

parameter should be your private GitLab repository URL, not the GitHub URL provided as an example. If you are not sure about the exact implementation for GitLab repositories and the token name used in the

credentials

dictionary for a GitLab repository, you should check the specific Prefect documentation for working with GitLab, or examine the source code of the

GitRepository

class for GitLab in the Prefect library. Be careful handling personal access tokens as they grant access to your repositories. Always keep them secret and don't expose them in your code or any version-controlled files.

I keep getting the error below when I try to load flow from a source located at a test gitlab private respository:

RuntimeError: Failed to clone repository '<https://gitlab.com/api/v4/projects/><project_id>' with exit code 128.

I use the same code snippet example (replacing github with my gitlab repository obviously). How could I possibly solve this issue? What could be the cause of cloning a repository error? here is my load_from_storage.py source:

from prefect import flow

from prefect.runner.storage import GitRepository

from prefect.blocks.system import Secret

my_flow = flow.from_source(

source=GitRepository(

# url="<https://gitlab.com/saberdy/prefect_demo>",

url="<https://gitlab.com/api/v4/projects/><project_id>",

credentials={

"username": "<mu_username>",

"access_token": Secret.load("prefect-demo").get(),

"branch": "master"

}

),

entrypoint="repo_info.py:get_repo_info"

)

if __name__ == "__main__":

my_flow()

The error that you're encountering (

RuntimeError: Failed to clone repository '<https://gitlab.com/api/v4/projects/><project_id>' with exit code 128

) suggests that there is a problem with cloning your GitLab repository. The exit code 128 often indicates an authentication or authorization issue, or it could be due to a problem with the provided repository URL. Here's how you might resolve the issue step-by-step: 1. Check Repository URL: Ensure that the repository URL is correctly formatted. For GitLab, the URL should generally look like this:

<https://gitlab.com/<username>/<repository>.git>

. From your code, it appears that you're using

<https://gitlab.com/api/v4/projects/<project_id>>

which looks like an API endpoint instead of the standard repository URL you should be using to clone. 2. Credentials: Verify that your

username

is correct and that the access token you've provided has sufficient permissions. The access token should have 'read_repository' or broader access if necessary. 3. Secret: Make sure that the secret

prefect-demo

you're trying to access exists and is set up with the appropriate value (i.e., your GitLab access token). The secret should be stored securely in a Secret block on Prefect Cloud, or accordingly in your local Prefect instance. 4. Branch Name: Confirm that the branch name

master

is indeed the correct branch you intend to pull from. Also, ensure that this information is provided in a correct manner within the

GitRepository

class signature, and not within the

credentials

dictionary. 5. Local Repository State: If you're running this code on a machine that has previously attempted to clone the repository, ensure that there's no existing directory/conflict with the same name you're trying to clone into. 6. Prefect Version: Make sure that you are using a Prefect version that is compatible with the ways you are using the

GitRepository

class. It's possible there's been a change in the way Prefect handles cloning from private repositories in newer versions. 7. GitLab API: Double-check that you do not need to use a specific endpoint designed for cloning via the GitLab API. The standard cloning process typically does not use the

/api/v4/projects

path. It seems that your issue might be linked with incorrect URL usage because it seems to involve the API endpoint rather than the direct repository URL. If after all these checks you still encounter an issue, you may want to look at any similar issues reported to see if there's a known bug or prevailing issue. Keep an eye on the details; it's always the tiny things that get overlooked, much to everyone's perpetual surprise.

I modified my url to direct to the main repository and also changed few other other stuff to be able to read my repository from gitlab remotely, but no success! This does not seem to be as straightforward as it should be (or I expected it to be following just documentation).

It seems there's been an input error. How may I assist you further? If there are additional details you need or further clarifications about handling the issue with cloning from your private GitLab repository, feel free to provide more information or ask another question.

@Marvin can you provide an up to date code snipet that does exactly what I want, a code that would do these: • import necessary modules • use

from_source

method of flow to clone a remote gitlab repository with personal access token with api, apt_read, respository_read permissions. • preferebly use

prefect_gitlab

modul to store all necessary information in a prefect corrspondent blocks (

GitLabRepository, GitLabCredentials

). • deploy and run the example flow below: # repo_info.py

import httpx
from prefect import flow


@flow(retries=3, retry_delay_seconds=5, log_prints=True)
def get_repo_info(repo_name: str = "PrefectHQ/prefect"):
    url = f"<https://api.github.com/repos/{repo_name}>"
    response = httpx.get(url)
    response.raise_for_status()
    repo = response.json()
    print(f"{repo_name} repository statistics 🤓:")
    print(f"Stars 🌠 : {repo['stargazers_count']}")
    print(f"Forks 🍴 : {repo['forks_count']}")

if __name__ == "__main__":
    get_repo_info()

Here is an updated code snippet that demonstrates how to load a remote GitLab repository:

python
from prefect import flow
from prefect_gitlab import GitLabRepository
from prefect_gitlab.credentials import GitLabCredentials
from prefect.blocks.system import Secret

# Ensure your GitLab personal access token is stored as a Secret block named "gitlab-access-token".
# You can create and store this token using Prefect UI or Prefect CLI.

@flow(retries=3, retry_delay_seconds=5, log_prints=True)
def get_repo_info(repo_name: str = "PrefectHQ/prefect"):
    # This flow is currently using GitHub's API. Update the URL to use GitLab API if necessary.
    url = f"<https://api.github.com/repos/{repo_name}>"
    response = httpx.get(url)
    response.raise_for_status()
    repo = response.json()
    print(f"{repo_name} repository statistics 🤓:")
    print(f"Stars 🌠 : {repo['stargazers_count']}")
    print(f"Forks 🍴 : {repo['forks_count']}")

# Replace the following placeholders with your actual repository information:
# - `<your_gitlab_url>`: The HTTP URL of your GitLab repository (e.g., '<https://gitlab.com/username/repository.git>').
# - `<your_branch_name>`: The branch you want to clone (e.g., 'main').

gitlab_credentials = GitLabCredentials(
    personal_access_token=Secret.load("gitlab-access-token").get(),
    api_url="<https://gitlab.com>",  # Adjust if you use a self-hosted GitLab instance
)

git_repository_block = GitLabRepository(
    url="<your_gitlab_url>",
    branch="<your_branch_name>",
    credentials=gitlab_credentials
)

my_flow = get_repo_info.from_source(
    source=git_repository_block,
    entrypoint="repo_info.py:get_repo_info"
)

if __name__ == "__main__":
    my_flow()

Make sure to store your GitLab personal access token (with

api

,

api_read

, and

repository_read

permissions) in a Secret block named

"gitlab-access-token"

before running this code. Also, update the placeholders for the repository URL and branch with your actual GitLab repository details. This script loads a flow

get_repo_info

from a remote GitLab repository. The

GitLabRepository

block represents the repository configuration, while

GitLabCredentials

represent authentication details to access your private GitLab repository. Keep in mind that this script must be updated properly to point to the GitLab API if you intend to fetch information from GitLab instead of GitHub. Furthermore, ensure that the

prefect-gitlab

package is installed and compatible with your Prefect version, and that it supports all the functionality required.

@Marvin building from your example snipet, I get this:

/prefect_gitlab/repositories.py", line 125, in _create_repo_url
    token = self.credentials.token.get_secret_value()
AttributeError: 'NoneType' object has no attribute 'get_secret_value'

Given that no issues were found that match your error, it seems that we might be dealing with an issue that hasn't been reported or one that is specific to your setup. The error message

'NoneType' object has no attribute 'get_secret_value'

suggests that the

token

attribute of the

credentials

object is

None

. This typically means that the secret you are trying to load does not exist or is not being loaded correctly. Here's what you can do to troubleshoot and potentially solve this issue: 1. Verify Secret Exists: Ensure that the secret named

"gitlab-access-token"

indeed exists where you expect it to be (either in Prefect Cloud or in the local Prefect instance). 2. Check Secret Loading: Confirm that the code that tries to load the secret is correct. For example, if your secret is named differently in Prefect, you should use the exact name when calling

Secret.load()

. 3. Prefect Context: If you're using Prefect Cloud, make sure that your local environment is correctly authenticated with Prefect Cloud and has access to the secrets. 4. Prefect Version: Ensure that you are using a Prefect version that supports the capabilities you're trying to use. 5. Dependencies: Double-check that the

prefect-gitlab

package is correctly installed in your environment. If not, you should install it. 6. Syntax Check: Make sure that the usage of

GitLabCredentials

and

GitLabRepository

matches the expected syntax and that the blocks are set up properly according to the documentation for the

prefect-gitlab

package. Here is a revised portion of the code you should check:

python
from prefect.blocks.system import Secret

gitlab_credentials = GitLabCredentials(
    personal_access_token=Secret.load("gitlab-access-token").get(),
    #...
)

#...

Adjust your code accordingly, ensure that all conditions above are met, and try running the flow again. If the error persists, consider a more thorough investigation into how the

prefect-gitlab

package manages secrets or seeking support from Prefect community resources.