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| 1 | +// Copyright 2024 The CUE Authors |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package cmd |
| 16 | + |
| 17 | +import ( |
| 18 | + "fmt" |
| 19 | + "strings" |
| 20 | + |
| 21 | + "cuelabs.dev/go/oci/ociregistry/ociref" |
| 22 | + "github.com/spf13/cobra" |
| 23 | + |
| 24 | + "cuelang.org/go/mod/module" |
| 25 | +) |
| 26 | + |
| 27 | +func newModResolveCmd(c *Command) *cobra.Command { |
| 28 | + cmd := &cobra.Command{ |
| 29 | + Use: "resolve <modulepath>[@<version>] ...", |
| 30 | + Short: "Show how a module path resolves to a registry", |
| 31 | + Long: `WARNING: THIS COMMAND IS EXPERIMENTAL. |
| 32 | +
|
| 33 | +This command prints information about how a given |
| 34 | +module path will resolve to an actual registry in the |
| 35 | +form of an OCI reference. |
| 36 | +
|
| 37 | +If the module version (which must be a canonical semver version) |
| 38 | +is omitted, it omits the tag from the reference. |
| 39 | +
|
| 40 | +It only consults local information - it works lexically |
| 41 | +with respect to the registry configuration (see "cue help registryconfig") |
| 42 | +and does not make any network calls to check whether |
| 43 | +the module exists. |
| 44 | +
|
| 45 | +Note: you must enable the modules experiment with: |
| 46 | + export CUE_EXPERIMENT=modules |
| 47 | +for this command to work. |
| 48 | +`, |
| 49 | + RunE: mkRunE(c, runModResolve), |
| 50 | + } |
| 51 | + return cmd |
| 52 | +} |
| 53 | + |
| 54 | +func runModResolve(cmd *Command, args []string) error { |
| 55 | + resolver, err := getRegistryResolver() |
| 56 | + if err != nil { |
| 57 | + return err |
| 58 | + } |
| 59 | + if resolver == nil { |
| 60 | + return fmt.Errorf("modules experiment not enabled (enable with CUE_EXPERIMENT=modules)") |
| 61 | + } |
| 62 | + |
| 63 | + for _, arg := range args { |
| 64 | + mpath, vers, ok := strings.Cut(arg, "@") |
| 65 | + if ok { |
| 66 | + if _, err := module.ParseVersion(arg); err != nil { |
| 67 | + return fmt.Errorf("invalid module path: %v", err) |
| 68 | + } |
| 69 | + } else { |
| 70 | + mpath = args[0] |
| 71 | + if err := module.CheckPathWithoutVersion(arg); err != nil { |
| 72 | + return fmt.Errorf("invalid module path: %v", err) |
| 73 | + } |
| 74 | + } |
| 75 | + loc, ok := resolver.ResolveToLocation(mpath, vers) |
| 76 | + if !ok { |
| 77 | + // TODO should we print this and carry on anyway? |
| 78 | + // And perhaps return a silent error when we do that? |
| 79 | + return fmt.Errorf("no registry found for module %q", arg) |
| 80 | + } |
| 81 | + |
| 82 | + ref := ociref.Reference{ |
| 83 | + Host: loc.Host, |
| 84 | + Repository: loc.Repository, |
| 85 | + } |
| 86 | + // TODO when vers is empty, loc.Tag does actually contain the |
| 87 | + // tag prefix (if any) so we could potentially provide more info, |
| 88 | + // but it might be misleading so leave it out for now. |
| 89 | + // Also, there's no way in the standard OCI reference syntax to |
| 90 | + // indicate that a connection is insecure, so leave out that |
| 91 | + // info too. We could use our own syntax (+insecure) but |
| 92 | + // that arguably makes the output less useful as it won't be |
| 93 | + // acceptable to standard tooling. |
| 94 | + if vers != "" { |
| 95 | + ref.Tag = loc.Tag |
| 96 | + } |
| 97 | + fmt.Println(ref) |
| 98 | + } |
| 99 | + return nil |
| 100 | +} |
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