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google-apis-rs/google_iamcredentials1_cli/index.html
2022-03-08 15:36:16 +08:00

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<p>The <code>iamcredentials1</code> command-line interface <em>(CLI)</em> allows to use most features of the <em>Google IAM Credentials</em> service from the comfort of your terminal.</p>
<p>By default all output is printed to standard out, but flags can be set to direct it into a file independent of your shell's
capabilities. Errors will be printed to standard error, and cause the program's exit code to be non-zero.</p>
<p>If data-structures are requested, these will be returned as pretty-printed JSON, to be useful as input to other tools.</p>
<p>Everything else about the <em>IAM Credentials</em> API can be found at the
<a href="https://cloud.google.com/iam/docs/creating-short-lived-service-account-credentials">official documentation site</a>.</p>
<h1 id="installation-and-source-code">Installation and Source Code</h1>
<p>Install the command-line interface with cargo using:</p>
<pre><code class="bash">cargo install google-iamcredentials1-cli
</code></pre>
<p>Find the source code <a href="https://github.com/Byron/google-apis-rs/tree/main/gen/iamcredentials1-cli">on github</a>.</p>
<h1 id="usage">Usage</h1>
<p>This documentation was generated from the <em>IAM Credentials</em> API at revision <em>20220225</em>. The CLI is at version <em>3.0.0</em>.</p>
<pre><code class="bash">iamcredentials1 [options]
projects
service-accounts-generate-access-token &lt;name&gt; (-r &lt;kv&gt;)... [-p &lt;v&gt;]... [-o &lt;out&gt;]
service-accounts-generate-id-token &lt;name&gt; (-r &lt;kv&gt;)... [-p &lt;v&gt;]... [-o &lt;out&gt;]
service-accounts-sign-blob &lt;name&gt; (-r &lt;kv&gt;)... [-p &lt;v&gt;]... [-o &lt;out&gt;]
service-accounts-sign-jwt &lt;name&gt; (-r &lt;kv&gt;)... [-p &lt;v&gt;]... [-o &lt;out&gt;]
iamcredentials1 --help
Configuration:
[--scope &lt;url&gt;]...
Specify the authentication a method should be executed in. Each scope
requires the user to grant this application permission to use it.
If unset, it defaults to the shortest scope url for a particular method.
--config-dir &lt;folder&gt;
A directory into which we will store our persistent data. Defaults to
a user-writable directory that we will create during the first invocation.
[default: ~/.google-service-cli]
</code></pre>
<h1 id="configuration">Configuration</h1>
<p>The program will store all persistent data in the <code>~/.google-service-cli</code> directory in <em>JSON</em> files prefixed with <code>iamcredentials1-</code>. You can change the directory used to store configuration with the <code>--config-dir</code> flag on a per-invocation basis.</p>
<p>More information about the various kinds of persistent data are given in the following paragraphs.</p>
<h1 id="authentication">Authentication</h1>
<p>Most APIs require a user to authenticate any request. If this is the case, the <a href="https://developers.google.com/+/api/oauth#scopes">scope</a> determines the
set of permissions granted. The granularity of these is usually no more than <em>read-only</em> or <em>full-access</em>.</p>
<p>If not set, the system will automatically select the smallest feasible scope, e.g. when invoking a
method that is read-only, it will ask only for a read-only scope.
You may use the <code>--scope</code> flag to specify a scope directly.
All applicable scopes are documented in the respective method's CLI documentation.</p>
<p>The first time a scope is used, the user is asked for permission. Follow the instructions given
by the CLI to grant permissions, or to decline.</p>
<p>If a scope was authenticated by the user, the respective information will be stored as <em>JSON</em> in the configuration
directory, e.g. <code>~/.google-service-cli/iamcredentials1-token-&lt;scope-hash&gt;.json</code>. No manual management of these tokens
is necessary.</p>
<p>To revoke granted authentication, please refer to the <a href="http://webapps.stackexchange.com/a/30849">official documentation</a>.</p>
<h1 id="application-secrets">Application Secrets</h1>
<p>In order to allow any application to use Google services, it will need to be registered using the
<a href="https://console.developers.google.com/">Google Developer Console</a>. APIs the application may use are then enabled for it
one by one. Most APIs can be used for free and have a daily quota.</p>
<p>To allow more comfortable usage of the CLI without forcing anyone to register an own application, the CLI
comes with a default application secret that is configured accordingly. This also means that heavy usage
all around the world may deplete the daily quota.</p>
<p>You can workaround this limitation by putting your own secrets file at this location:
<code>~/.google-service-cli/iamcredentials1-secret.json</code>, assuming that the required <em>iamcredentials</em> API
was enabled for it. Such a secret file can be downloaded in the <em>Google Developer Console</em> at
<em>APIs &amp; auth -&gt; Credentials -&gt; Download JSON</em> and used as is.</p>
<p>Learn more about how to setup Google projects and enable APIs using the <a href="https://developers.google.com/console/help/new/">official documentation</a>.</p>
<h1 id="debugging">Debugging</h1>
<p>Even though the CLI does its best to provide usable error messages, sometimes it might be desirable to know
what exactly led to a particular issue. This is done by allowing all client-server communication to be
output to standard error <em>as-is</em>.</p>
<p>The <code>--debug</code> flag will print errors using the <code>Debug</code> representation to standard error.</p>
<p>You may consider redirecting standard error into a file for ease of use, e.g. <code>iamcredentials1 --debug &lt;resource&gt; &lt;method&gt; [options] 2&gt;debug.txt</code>.</p>
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