Initial commit

Author: Jim Clark

.gitignore

@@ -0,0 +1,4 @@
+/parser
+/.clj-kondo/
+/.cpcache/
+/.lsp/

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+# Contributing
+
+Make an [issue](https://github.com/atomisthq/pod-babashka-docker/issues) and/or [PR](https://github.com/atomisthq/pod-babashka-docker/pulls).

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -0,0 +1,44 @@
+## Background
+
+This is a [babashka pod](https://github.com/babashka/pods) that binds some golang functions into a clojure namespace.  Using this pod, clojure programs can parse dockerfiles and docker images names using the "official" docker golang libraries.  
+
+* [`github.com/docker/distribution/reference`](https://github.com/distribution/distribution/blob/main/reference/reference.go) (for image name parsing)
+* [`github.com/moby/buildkit/frontend/dockerfile/parser`](https://github.com/moby/buildkit/blob/master/frontend/dockerfile/parser/parser.go) (for generating a Dockerfile AST).
+
+## Usage
+
+```clojure
+(require '[babashka.pods :as pods])
+(pods/load-pod 'atomisthq/docker "0.1.0")
+; OR use a locally built pod binary
+#_(pods/load-pod "./parser")
+
+;; load-pod will create this namespace with two vars
+(require '[pod.babashka.docker :as docker])
+
+;; parse image names using github.com/docker/distribution 
+;; turns golang structs into clojure maps
+(docker/parse-image-name "gcr.io/whatever:tag") 
+;; automatically turns golang errors into Exceptions
+(try
+  (docker/parse-image-name "gcr.io/whatever/:tag")
+  (catch Exception e 
+    ;; invalid reference format
+    (println (.getMessage e))))
+
+;; parse dockerfiles using github.com/moby/buildkit
+;; returns the Result struct transformed to a clojure map
+(docker/parse-dockerfile "FROM \\\n    gcr.io/whatever:tag\nCMD [\"run\"]")
+```
+
+## Building
+
+To build the golang `parser` binary locally, run `go build`.
+
+```bash
+go build
+```
+
+## Contributing
+
+You can find information about contributing to this project in the CONTRIBUTING.md

babashka/ops.go

@@ -0,0 +1,88 @@
+package babashka
+
+import (
+	"bufio"
+	"encoding/json"
+	"os"
+
+	"github.com/jackpal/bencode-go"
+)
+
+type Message struct {
+	Op   string
+	Id   string
+	Args string
+	Var  string
+}
+
+type Namespace struct {
+	Name string "name"
+	Vars []Var  "vars"
+}
+
+type Var struct {
+	Name string "name"
+	Code string `bencode:"code,omitempty"`
+}
+
+type DescribeResponse struct {
+	Format     string      "format"
+	Namespaces []Namespace "namespaces"
+}
+
+type InvokeResponse struct {
+	Id     string   "id"
+	Value  string   "value" // stringified json response
+	Status []string "status"
+}
+
+type ErrorResponse struct {
+	Id        string   "id"
+	Status    []string "status"
+	ExMessage string   "ex-message"
+	ExData    string   "ex-data"
+}
+
+func ReadMessage() (*Message, error) {
+	reader := bufio.NewReader(os.Stdin)
+	message := &Message{}
+	if err := bencode.Unmarshal(reader, &message); err != nil {
+		return nil, err
+	}
+
+	return message, nil
+}
+
+func WriteDescribeResponse(describeResponse *DescribeResponse) {
+	writeResponse(*describeResponse)
+}
+
+func WriteInvokeResponse(inputMessage *Message, value any) error {
+	if value == nil {
+		return nil
+	}
+	resultValue, err := json.Marshal(value)
+	if err != nil {
+		return err
+	}
+	response := InvokeResponse{Id: inputMessage.Id, Status: []string{"done"}, Value: string(resultValue)}
+	writeResponse(response)
+
+	return nil
+}
+
+func WriteErrorResponse(inputMessage *Message, err error) {
+	errorResponse := ErrorResponse{Id: inputMessage.Id, Status: []string{"done", "error"}, ExMessage: err.Error()}
+	writeResponse(errorResponse)
+}
+
+func writeResponse(response any) error {
+	writer := bufio.NewWriter(os.Stdout)
+	if err := bencode.Marshal(writer, response); err != nil {
+		return err
+	}
+
+	writer.Flush()
+
+	return nil
+}

deps.edn

@@ -0,0 +1,3 @@
+{:sources ["dev"]
+ :deps {babashka/babashka.pods {:mvn/version "0.1.0"}
+        com.cognitect/transit-clj {:mvn/version "1.0.324"}}}

dev/user.clj

@@ -0,0 +1,20 @@
+(ns user
+  (:require [babashka.pods :as pods]))
+
+(pods/load-pod 'atomisthq/docker "0.1.0")
+(require '[pod.babashka.docker :as docker])
+
+;; parse image names using github.com/docker/distribution 
+;; turns golang structs into clojure maps
+(docker/parse-image-name "gcr.io/whatever:tag") 
+;; automatically turns golang errors into Exceptions
+(try
+  (docker/parse-image-name "gcr.io/whatever/:tag")
+  (catch Exception e 
+    ;; invalid reference format
+    (println (.getMessage e))))
+
+;; parse dockerfiles using github.com/moby/buildkit
+;; returns the Result struct transformed to a clojure map
+(docker/parse-dockerfile "FROM \\\n    gcr.io/whatever:tag\nCMD [\"run\"]")
+