git config core.longpaths true 

## Building

The project is built with Gradle. Run Gradle to build the project and to run the tests 
using the following command on Unix/macOS:

    ./gradlew <tasks-and-options>
    
or the following command on Windows:

    gradlew <tasks-and-options>

On the first project configuration gradle will download and setup the dependencies on

        param("env.GRADLE_INTERNAL_REPO_URL", "%gradle.internal.repository.url%")
        if (os == Os.MACOS) {
            // Use fewer parallel forks on macOs, since the agents are not very powerful.
            param("maxParallelForks", "2")
        }
        if (os == Os.LINUX || os == Os.MACOS) {
            param("env.LC_ALL", "en_US.UTF-8")
        }
    }
}

# ==============================================================================
#
# Changes the behavior in pycpp.sh from "run all tests" to "verify that all
# tests can compile." Used in some CI jobs (macOS and Linux Arm64) where test
# execution is too expensive.
TFCI_PYCPP_SWAP_TO_BUILD_ENABLE=1

    cat "$FROM_ENV"
    source "$FROM_ENV"
    rm "$FROM_ENV"
  fi
fi

# Mac builds have some specific setup needs. See setup_macos.sh for details
if [[ "${OSTYPE}" =~ darwin* ]]; then
  source ./ci/official/utilities/setup_macos.sh
fi

# Create and expand to the full path of TFCI_OUTPUT_DIR
export TFCI_OUTPUT_DIR=$(realpath "$TFCI_OUTPUT_DIR")
mkdir -p "$TFCI_OUTPUT_DIR"

    if: github.event_name == 'push' || ( github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork )

    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
      fail-fast: false

    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false

      - uses: actions/setup-java@v4

                ) {
                    eachFile {
                        // Remove top folder when unzipping, that way we get rid of Android Studio.app folder that can cause issues on Mac
                        // where MacOS would kill the Android Studio process right after start, issue: https://github.com/gradle/gradle-profiler/issues/469
                        relativePath = RelativePath(true, *relativePath.segments.drop(1).toTypedArray())

  val safari12iOS = sslLabsClients.first { it.userAgent == "Safari" && it.platform == "iOS 12.3.1" }
  val safari12Osx =
    sslLabsClients.first { it.userAgent == "Safari" && it.platform == "MacOS 10.14.6 Beta" }

  val okhttp = currentOkHttp(ianaSuitesNew)

  val okHttp_4_10 = historicOkHttp("4.10")
  val okHttp_3_14 = historicOkHttp("3.14")
  val okHttp_3_13 = historicOkHttp("3.13")

You can create and use environment variables in the shell, without needing Python:

=== "Linux, macOS, Windows Bash"

    <div class="termy">

    ```console
    // You could create an env var MY_NAME with
    $ export MY_NAME="Wade Wilson"

    // Then you could use it with other programs, like

package(
    # copybara:uncomment default_applicable_licenses = ["//tensorflow:license"],
    default_visibility = ["//visibility:private"],
    licenses = ["notice"],
)

# Filesystem implementation for POSIX environments: Linux, MacOS, Android, etc.
tf_cc_shared_object(
    name = "libposix_filesystem.so",
    framework_so = [],
    linkstatic = False,
    visibility = ["//visibility:public"],
    deps = [":posix_filesystem_impl"],
)

因此，通常会将它们提供为由应用程序读取的环境变量。

## 环境变量

!!! tip
    如果您已经知道什么是"环境变量"以及如何使用它们，请随意跳到下面的下一节。

环境变量（也称为"env var"）是一种存在于 Python 代码之外、存在于操作系统中的变量，可以被您的 Python 代码（或其他程序）读取。

您可以在 shell 中创建和使用环境变量，而无需使用 Python：

=== "Linux、macOS、Windows Bash"

    <div class="termy">

    ```console
    // 您可以创建一个名为 MY_NAME 的环境变量
    $ export MY_NAME="Wade Wilson"

    // 然后您可以与其他程序一起使用它，例如
    $ echo "Hello $MY_NAME"

    Hello Wade Wilson