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initialize.go
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initialize.go
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
package alzlib
import (
"context"
"crypto/sha256"
"fmt"
"io/fs"
"net/url"
"os"
"path/filepath"
"github.com/Azure/alzlib/internal/processor"
"github.com/hashicorp/go-getter/v2"
)
const (
fetchDefaultBaseDir = ".alzlib" // fetchDefaultBaseDir is the default base directory for fetching libraries.
fetchDefaultBaseDirEnv = "ALZLIB_DIR" // fetchDefaultBaseDirEnv is the environment variable to override the default base directory.
alzLibraryGitUrl = "github.com/Azure/Azure-Landing-Zones-Library" // alzLibraryGitUrl is the URL of the Azure Landing Zones Library.
alzLibraryGitUrlEnv = "ALZLIB_LIBRARY_GIT_URL" // alzLibraryGitUrlEnv is the environment variable to override the default git URL.
)
// fetchLibraryWithDependencies takes a library reference, fetches it, and then fetches all of its dependencies.
// The destination directory is an integer that will be appended to the `.alzlib` directory in the current working directory.
// This can be override by setting the `ALZLIB_DIR` environment variable.
// The `LibraryReferences` slice can be used to initialize the AlzLib instance.
func fetchLibraryWithDependencies(ctx context.Context, processed map[string]bool, lib LibraryReference, result *LibraryReferences) error {
if processed[lib.String()] {
return nil
}
f, err := lib.Fetch(ctx, hash(lib))
if err != nil {
return fmt.Errorf("FetchLibraryWithDependencies: error fetching library %s: %w", lib.String(), err)
}
pscl := processor.NewProcessorClient(f)
libmeta, err := pscl.Metadata()
if err != nil {
return fmt.Errorf("FetchLibraryWithDependencies: error getting metadata for library %s: %w", lib.String(), err)
}
meta := NewMetadata(libmeta, lib)
// for each dependency, recurse using this function
for _, dep := range meta.Dependencies() {
err = fetchLibraryWithDependencies(ctx, processed, dep, result)