Add --format option to skopeo inspect

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/report/camelcase/LICENSE.md

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Fatih Arslan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/containers/common/pkg/report/camelcase/README.md

@@ -0,0 +1,58 @@
+# CamelCase [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/fatih/camelcase) [![Build Status](http://img.shields.io/travis/fatih/camelcase.svg?style=flat-square)](https://travis-ci.org/fatih/camelcase)
+
+CamelCase is a Golang (Go) package to split the words of a camelcase type
+string into a slice of words. It can be used to convert a camelcase word (lower
+or upper case) into any type of word.
+
+## Splitting rules:
+
+1. If string is not valid UTF-8, return it without splitting as
+   single item array.
+2. Assign all unicode characters into one of 4 sets: lower case
+   letters, upper case letters, numbers, and all other characters.
+3. Iterate through characters of string, introducing splits
+   between adjacent characters that belong to different sets.
+4. Iterate through array of split strings, and if a given string
+   is upper case:
+   * if subsequent string is lower case:
+     * move last character of upper case string to beginning of
+       lower case string
+
+## Install
+
+```bash
+go get github.com/fatih/camelcase
+```
+
+## Usage and examples
+
+```go
+splitted := camelcase.Split("GolangPackage")
+
+fmt.Println(splitted[0], splitted[1]) // prints: "Golang", "Package"
+```
+
+Both lower camel case and upper camel case are supported. For more info please
+check: [http://en.wikipedia.org/wiki/CamelCase](http://en.wikipedia.org/wiki/CamelCase)
+
+Below are some example cases:
+
+```
+"" =>                     []
+"lowercase" =>            ["lowercase"]
+"Class" =>                ["Class"]
+"MyClass" =>              ["My", "Class"]
+"MyC" =>                  ["My", "C"]
+"HTML" =>                 ["HTML"]
+"PDFLoader" =>            ["PDF", "Loader"]
+"AString" =>              ["A", "String"]
+"SimpleXMLParser" =>      ["Simple", "XML", "Parser"]
+"vimRPCPlugin" =>         ["vim", "RPC", "Plugin"]
+"GL11Version" =>          ["GL", "11", "Version"]
+"99Bottles" =>            ["99", "Bottles"]
+"May5" =>                 ["May", "5"]
+"BFG9000" =>              ["BFG", "9000"]
+"BöseÜberraschung" =>     ["Böse", "Überraschung"]
+"Two  spaces" =>          ["Two", "  ", "spaces"]
+"BadUTF8\xe2\xe2\xa1" =>  ["BadUTF8\xe2\xe2\xa1"]
+```

vendor/github.com/containers/common/pkg/report/camelcase/camelcase.go

@@ -0,0 +1,91 @@
+// Package camelcase is a micro package to split the words of a camelcase type
+// string into a slice of words.
+package camelcase
+
+import (
+	"unicode"
+	"unicode/utf8"
+)
+
+// Split splits the camelcase word and returns a list of words. It also
+// supports digits. Both lower camel case and upper camel case are supported.
+// For more info please check: http://en.wikipedia.org/wiki/CamelCase
+//
+// Examples
+//
+//   "" =>                     [""]
+//   "lowercase" =>            ["lowercase"]
+//   "Class" =>                ["Class"]
+//   "MyClass" =>              ["My", "Class"]
+//   "MyC" =>                  ["My", "C"]
+//   "HTML" =>                 ["HTML"]
+//   "PDFLoader" =>            ["PDF", "Loader"]
+//   "AString" =>              ["A", "String"]
+//   "SimpleXMLParser" =>      ["Simple", "XML", "Parser"]
+//   "vimRPCPlugin" =>         ["vim", "RPC", "Plugin"]
+//   "GL11Version" =>          ["GL", "11", "Version"]
+//   "99Bottles" =>            ["99", "Bottles"]
+//   "May5" =>                 ["May", "5"]
+//   "BFG9000" =>              ["BFG", "9000"]
+//   "BöseÜberraschung" =>     ["Böse", "Überraschung"]
+//   "Two  spaces" =>          ["Two", "  ", "spaces"]
+//   "BadUTF8\xe2\xe2\xa1" =>  ["BadUTF8\xe2\xe2\xa1"]
+//
+// Splitting rules
+//
+//  1) If string is not valid UTF-8, return it without splitting as
+//     single item array.
+//  2) Assign all unicode characters into one of 4 sets: lower case
+//     letters, upper case letters, numbers, and all other characters.
+//  3) Iterate through characters of string, introducing splits
+//     between adjacent characters that belong to different sets.
+//  4) Iterate through array of split strings, and if a given string
+//     is upper case:
+//       if subsequent string is lower case:
+//         move last character of upper case string to beginning of
+//         lower case string
+func Split(src string) (entries []string) {
+	// don't split invalid utf8
+	if !utf8.ValidString(src) {
+		return []string{src}
+	}
+	entries = []string{}
+	var runes [][]rune
+	lastClass := 0
+	class := 0
+	// split into fields based on class of unicode character
+	for _, r := range src {
+		switch {
+		case unicode.IsLower(r):
+			class = 1
+		case unicode.IsUpper(r):
+			class = 2
+		case unicode.IsDigit(r):
+			class = 3
+		default:
+			class = 4
+		}
+		if class == lastClass {
+			runes[len(runes)-1] = append(runes[len(runes)-1], r)
+		} else {
+			runes = append(runes, []rune{r})
+		}
+		lastClass = class
+	}
+	// handle upper case -> lower case sequences, e.g.
+	// "PDFL", "oader" -> "PDF", "Loader"
+	for i := 0; i < len(runes)-1; i++ {
+		if unicode.IsUpper(runes[i][0]) && unicode.IsLower(runes[i+1][0]) {
+			runes[i+1] = append([]rune{runes[i][len(runes[i])-1]}, runes[i+1]...)
+			runes[i] = runes[i][:len(runes[i])-1]
+		}
+	}
+	// construct []string from results
+	for _, s := range runes {
+		if len(s) > 0 {
+			entries = append(entries, string(s))
+		}
+	}
+
+	return entries
+}

vendor/github.com/containers/common/pkg/report/doc.go

@@ -0,0 +1,46 @@
+/*
+Package report provides helper structs/methods/funcs for formatting output
+
+To format output for an array of structs:
+
+	w := report.NewWriterDefault(os.Stdout)
+	defer w.Flush()
+
+	headers := report.Headers(struct {
+		ID string
+	}{}, nil)
+	t, _ := report.NewTemplate("command name").Parse("{{range .}}{{.ID}}{{end}}")
+	t.Execute(t, headers)
+	t.Execute(t, map[string]string{
+		"ID":"fa85da03b40141899f3af3de6d27852b",
+	})
+	// t.IsTable() == false
+
+or
+
+	w := report.NewWriterDefault(os.Stdout)
+	defer w.Flush()
+
+	headers := report.Headers(struct {
+		CID string
+	}{}, map[string]string{
+		"CID":"ID"})
+	t, _ := report.NewTemplate("command name").Parse("table {{.CID}}")
+	t.Execute(t, headers)
+	t.Execute(t,map[string]string{
+		"CID":"fa85da03b40141899f3af3de6d27852b",
+	})
+	// t.IsTable() == true
+
+Helpers:
+
+	if report.IsJSON(cmd.Flag("format").Value.String()) {
+		... process JSON and output
+	}
+
+and
+
+
+Note: Your code should not ignore errors
+*/
+package report

vendor/github.com/containers/common/pkg/report/template.go

@@ -0,0 +1,115 @@
+package report
+
+import (
+	"reflect"
+	"strings"
+	"text/template"
+
+	"github.com/containers/common/pkg/report/camelcase"
+)
+
+// Template embeds template.Template to add functionality to methods
+type Template struct {
+	*template.Template
+	isTable bool
+}
+
+// FuncMap is aliased from template.FuncMap
+type FuncMap template.FuncMap
+
+// tableReplacer will remove 'table ' prefix and clean up tabs
+var tableReplacer = strings.NewReplacer(
+	"table ", "",
+	`\t`, "\t",
+	`\n`, "\n",
+	" ", "\t",
+)
+
+// escapedReplacer will clean up escaped characters from CLI
+var escapedReplacer = strings.NewReplacer(
+	`\t`, "\t",
+	`\n`, "\n",
+)
+
+// NormalizeFormat reads given go template format provided by CLI and munges it into what we need
+func NormalizeFormat(format string) string {
+	var f string
+	// two replacers used so we only remove the prefix keyword `table`
+	if strings.HasPrefix(format, "table ") {
+		f = tableReplacer.Replace(format)
+	} else {
+		f = escapedReplacer.Replace(format)
+	}
+
+	if !strings.HasSuffix(f, "\n") {
+		f += "\n"
+	}
+	return f
+}
+
+// Headers queries the interface for field names.
+// Array of map is returned to support range templates
+// Note: unexported fields can be supported by adding field to overrides
+// Note: It is left to the developer to write out said headers
+//       Podman commands use the general rules of:
+//       1) unchanged --format includes headers
+//       2) --format '{{.ID}"        # no headers
+//       3) --format 'table {{.ID}}' # includes headers
+func Headers(object interface{}, overrides map[string]string) []map[string]string {
+	value := reflect.ValueOf(object)
+	if value.Kind() == reflect.Ptr {
+		value = value.Elem()
+	}
+
+	// Column header will be field name upper-cased.
+	headers := make(map[string]string, value.NumField())
+	for i := 0; i < value.Type().NumField(); i++ {
+		field := value.Type().Field(i)
+		// Recurse to find field names from promoted structs
+		if field.Type.Kind() == reflect.Struct && field.Anonymous {
+			h := Headers(reflect.New(field.Type).Interface(), nil)
+			for k, v := range h[0] {
+				headers[k] = v
+			}
+			continue
+		}
+		name := strings.Join(camelcase.Split(field.Name), " ")
+		headers[field.Name] = strings.ToUpper(name)
+	}
+
+	if len(overrides) > 0 {
+		// Override column header as provided
+		for k, v := range overrides {
+			headers[k] = strings.ToUpper(v)
+		}
+	}
+	return []map[string]string{headers}
+}
+
+// NewTemplate creates a new template object
+func NewTemplate(name string) *Template {
+	return &Template{template.New(name), false}
+}
+
+// Parse parses text as a template body for t
+func (t *Template) Parse(text string) (*Template, error) {
+	if strings.HasPrefix(text, "table ") {
+		t.isTable = true
+		text = "{{range .}}" + NormalizeFormat(text) + "{{end}}"
+	} else {
+		text = NormalizeFormat(text)
+	}
+
+	tt, err := t.Template.Parse(text)
+	return &Template{tt, t.isTable}, err
+}
+
+// Funcs adds the elements of the argument map to the template's function map
+func (t *Template) Funcs(funcMap FuncMap) *Template {
+	return &Template{t.Template.Funcs(template.FuncMap(funcMap)), t.isTable}
+}
+
+// IsTable returns true if format string defines a "table"
+func (t *Template) IsTable() bool {
+	return t.isTable
+}

vendor/github.com/containers/common/pkg/report/validate.go

@@ -0,0 +1,13 @@
+package report
+
+import "regexp"
+
+var jsonRegex = regexp.MustCompile(`^\s*(json|{{\s*json\s*(\.)?\s*}})\s*$`)
+
+// JSONFormat test CLI --format string to be a JSON request
+// if report.IsJSON(cmd.Flag("format").Value.String()) {
+//   ... process JSON and output
+// }
+func IsJSON(s string) bool {
+	return jsonRegex.MatchString(s)
+}

vendor/github.com/containers/common/pkg/report/writer.go

@@ -0,0 +1,27 @@
+package report
+
+import (
+	"io"
+	"text/tabwriter"
+)
+
+// Writer aliases tabwriter.Writer to provide Podman defaults
+type Writer struct {
+	*tabwriter.Writer
+}
+
+// NewWriter initializes a new report.Writer with given values
+func NewWriter(output io.Writer, minwidth, tabwidth, padding int, padchar byte, flags uint) (*Writer, error) {
+	t := tabwriter.NewWriter(output, minwidth, tabwidth, padding, padchar, flags)
+	return &Writer{t}, nil
+}
+
+// NewWriterDefault initializes a new report.Writer with Podman defaults
+func NewWriterDefault(output io.Writer) (*Writer, error) {
+	return NewWriter(output, 12, 2, 2, ' ', 0)
+}
+
+// Flush any output left in buffers
+func (w *Writer) Flush() error {
+	return w.Writer.Flush()
+}