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75 lines
3.1 KiB
Markdown
75 lines
3.1 KiB
Markdown
## Private modules and repositories
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There maybe instances where you want to load a remote module that is located in
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a _private_ repository, like a private repository on GitHub.
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Deno supports sending bearer tokens when requesting a remote module. Bearer
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tokens are the predominate type of access token used with OAuth 2.0 and is
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broadly supported by hosting services (e.g. GitHub, Gitlab, BitBucket,
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Cloudsmith, etc.).
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### DENO_AUTH_TOKENS
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The Deno CLI will look for an environment variable named `DENO_AUTH_TOKENS` to
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determine what authentication tokens it should consider using when requesting
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remote modules. The value of the environment variable is in the format of a _n_
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number of tokens deliminated by a semi-colon (`;`) where each token is in the
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format of `{token}@{hostname[:port]}`.
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For example a single token for would look something like this:
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```sh
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DENO_AUTH_TOKENS=a1b2c3d4e5f6@deno.land
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```
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And multiple tokens would look like this:
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```sh
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DENO_AUTH_TOKENS=a1b2c3d4e5f6@deno.land;f1e2d3c4b5a6@example.com:8080
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```
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When Deno goes to fetch a remote module, where the hostname matches the hostname
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of the remote module, Deno will set the `Authorization` header of the request to
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the value of `Bearer {token}`. This allows the remote server to recognize that
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the request is an authorized request tied to a specific authenticated user, and
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provide access to the appropriate resources and modules on the server.
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### GitHub
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To be able to access private repositories on GitHub, you would need to issue
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yourself a _personal access token_. You do this by logging into GitHub and going
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under _Settings -> Developer settings -> Personal access tokens_:
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You would then choose to _Generate new token_ and give your token a description
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and appropriate access:
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And once created GitHub will display the new token a single time, the value of
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which you would want to use in the environment variable:
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In order to access modules that are contained in a private repository on GitHub,
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you would want to use the generated token in the `DENO_AUTH_TOKENS` environment
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variable scoped to the `raw.githubusercontent.com` hostname. For example:
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```sh
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DENO_AUTH_TOKENS=a1b2c3d4e5f6@raw.githubusercontent.com
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```
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This should allow Deno to access any modules that the user who the token was
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issued for has access to.
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When the token is incorrect, or the user does not have access to the module,
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GitHub will issue a `404 Not Found` status, instead of an unauthorized status.
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So if you are getting errors that the modules you are trying to access are not
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found on the command line, check the environment variable settings and the
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personal access token settings.
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In addition, `deno run -L debug` should print out a debug message about the
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number of tokens that are parsed out of the environment variable. It will print
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an error message if it feels any of the tokens are malformed. It won't print any
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details about the tokens for security purposes.
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