From c0757374bf187edcf4ae8c4811e162e27794ebf8 Mon Sep 17 00:00:00 2001 From: Jhon Honce Date: Mon, 3 Aug 2020 09:18:49 -0700 Subject: Restore "table" --format from V1 * --format "table {{.field..." will print fields out in a table with headings. Table keyword is removed, spaces between fields are converted to tabs * Update parse.MatchesJSONFormat()'s regex to be more inclusive * Add report.Headers(), obtain all the field names to be used as column headers, a map of field name to column headers may be provided to override the field names * Update several commands to use new functions Signed-off-by: Jhon Honce --- cmd/podman/containers/diff.go | 9 ++--- cmd/podman/images/list.go | 74 +++++++++++++++++++--------------------- cmd/podman/parse/json.go | 3 +- cmd/podman/parse/json_test.go | 25 +++++++++++--- cmd/podman/report/format.go | 68 ++++++++++++++++++++++++++++++++++++ cmd/podman/report/format_test.go | 35 +++++++++++++++++++ 6 files changed, 165 insertions(+), 49 deletions(-) create mode 100644 cmd/podman/report/format.go create mode 100644 cmd/podman/report/format_test.go (limited to 'cmd/podman') diff --git a/cmd/podman/containers/diff.go b/cmd/podman/containers/diff.go index 227c13f4c..a3ca6edf9 100644 --- a/cmd/podman/containers/diff.go +++ b/cmd/podman/containers/diff.go @@ -1,6 +1,7 @@ package containers import ( + "github.com/containers/podman/v2/cmd/podman/parse" "github.com/containers/podman/v2/cmd/podman/registry" "github.com/containers/podman/v2/cmd/podman/report" "github.com/containers/podman/v2/cmd/podman/validate" @@ -52,11 +53,11 @@ func diff(cmd *cobra.Command, args []string) error { return err } - switch diffOpts.Format { - case "": - return report.ChangesToTable(results) - case "json": + switch { + case parse.MatchesJSONFormat(diffOpts.Format): return report.ChangesToJSON(results) + case diffOpts.Format == "": + return report.ChangesToTable(results) default: return errors.New("only supported value for '--format' is 'json'") } diff --git a/cmd/podman/images/list.go b/cmd/podman/images/list.go index ffb341fc4..239da9d28 100644 --- a/cmd/podman/images/list.go +++ b/cmd/podman/images/list.go @@ -11,7 +11,9 @@ import ( "unicode" "github.com/containers/image/v5/docker/reference" + "github.com/containers/podman/v2/cmd/podman/parse" "github.com/containers/podman/v2/cmd/podman/registry" + "github.com/containers/podman/v2/cmd/podman/report" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/docker/go-units" "github.com/pkg/errors" @@ -106,9 +108,12 @@ func images(cmd *cobra.Command, args []string) error { switch { case listFlag.quiet: return writeID(imgs) - case cmd.Flag("format").Changed && listFlag.format == "json": + case parse.MatchesJSONFormat(listFlag.format): return writeJSON(imgs) default: + if cmd.Flag("format").Changed { + listFlag.noHeading = true // V1 compatibility + } return writeTemplate(imgs) } } @@ -156,25 +161,29 @@ func writeJSON(images []imageReporter) error { } func writeTemplate(imgs []imageReporter) error { - var ( - hdr, row string - ) - if len(listFlag.format) < 1 { - hdr, row = imageListFormat(listFlag) + hdrs := report.Headers(imageReporter{}, map[string]string{ + "ID": "IMAGE ID", + "ReadOnly": "R/O", + }) + + var row string + if listFlag.format == "" { + row = lsFormatFromFlags(listFlag) } else { - row = listFlag.format - if !strings.HasSuffix(row, "\n") { - row += "\n" - } + row = report.NormalizeFormat(listFlag.format) } - format := hdr + "{{range . }}" + row + "{{end}}" - tmpl, err := template.New("list").Parse(format) - if err != nil { - return err - } - tmpl = template.Must(tmpl, nil) + + format := "{{range . }}" + row + "{{end}}" + tmpl := template.Must(template.New("list").Parse(format)) w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0) defer w.Flush() + + if !listFlag.noHeading { + if err := tmpl.Execute(w, hdrs); err != nil { + return err + } + } + return tmpl.Execute(w, imgs) } @@ -276,40 +285,27 @@ func sortFunc(key string, data []imageReporter) func(i, j int) bool { } } -func imageListFormat(flags listFlagType) (string, string) { - // Defaults - hdr := "REPOSITORY\tTAG" - row := "{{.Repository}}\t{{if .Tag}}{{.Tag}}{{else}}{{end}}" +func lsFormatFromFlags(flags listFlagType) string { + row := []string{ + "{{if .Repository}}{{.Repository}}{{else}}{{end}}", + "{{if .Tag}}{{.Tag}}{{else}}{{end}}", + } if flags.digests { - hdr += "\tDIGEST" - row += "\t{{.Digest}}" + row = append(row, "{{.Digest}}") } - hdr += "\tIMAGE ID" - row += "\t{{.ID}}" - - hdr += "\tCREATED\tSIZE" - row += "\t{{.Created}}\t{{.Size}}" + row = append(row, "{{.ID}}", "{{.Created}}", "{{.Size}}") if flags.history { - hdr += "\tHISTORY" - row += "\t{{if .History}}{{.History}}{{else}}{{end}}" + row = append(row, "{{if .History}}{{.History}}{{else}}{{end}}") } if flags.readOnly { - hdr += "\tReadOnly" - row += "\t{{.ReadOnly}}" - } - - if flags.noHeading { - hdr = "" - } else { - hdr += "\n" + row = append(row, "{{.ReadOnly}}") } - row += "\n" - return hdr, row + return strings.Join(row, "\t") + "\n" } type imageReporter struct { diff --git a/cmd/podman/parse/json.go b/cmd/podman/parse/json.go index 95a6633b8..40ac415db 100644 --- a/cmd/podman/parse/json.go +++ b/cmd/podman/parse/json.go @@ -2,8 +2,9 @@ package parse import "regexp" -var jsonFormatRegex = regexp.MustCompile(`^(\s*json\s*|\s*{{\s*json\s*\.\s*}}\s*)$`) +var jsonFormatRegex = regexp.MustCompile(`^\s*(json|{{\s*json\s*( \.)?\s*}})\s*$`) +// MatchesJSONFormat test CLI --format string to be a JSON request func MatchesJSONFormat(s string) bool { return jsonFormatRegex.Match([]byte(s)) } diff --git a/cmd/podman/parse/json_test.go b/cmd/podman/parse/json_test.go index 5cad185fd..ec3b5664b 100644 --- a/cmd/podman/parse/json_test.go +++ b/cmd/podman/parse/json_test.go @@ -1,6 +1,8 @@ package parse import ( + "fmt" + "strings" "testing" "github.com/stretchr/testify/assert" @@ -13,18 +15,31 @@ func TestMatchesJSONFormat(t *testing.T) { }{ {"json", true}, {" json", true}, - {"json ", true}, + {" json ", true}, {" json ", true}, + {"{{json}}", true}, + {"{{json }}", true}, {"{{json .}}", true}, {"{{ json .}}", true}, - {"{{json . }}", true}, - {" {{ json . }} ", true}, - {"{{json }}", false}, - {"{{json .", false}, + {"{{ json . }}", true}, + {" {{ json . }} ", true}, + {"{{ json .", false}, {"json . }}", false}, + {"{{.ID }} json .", false}, + {"json .", false}, + {"{{json.}}", false}, } for _, tt := range tests { assert.Equal(t, tt.expected, MatchesJSONFormat(tt.input)) } + + for _, tc := range tests { + tc := tc + label := "MatchesJSONFormat/" + strings.ReplaceAll(tc.input, " ", "_") + t.Run(label, func(t *testing.T) { + t.Parallel() + assert.Equal(t, tc.expected, MatchesJSONFormat(tc.input), fmt.Sprintf("Scanning %q failed", tc.input)) + }) + } } diff --git a/cmd/podman/report/format.go b/cmd/podman/report/format.go new file mode 100644 index 000000000..32d92bec5 --- /dev/null +++ b/cmd/podman/report/format.go @@ -0,0 +1,68 @@ +package report + +import ( + "reflect" + "strings" +) + +// 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 { + f := format + // two replacers used so we only remove the prefix keyword `table` + if strings.HasPrefix(f, "table ") { + f = tableReplacer.Replace(f) + } else { + f = escapedReplacer.Replace(format) + } + + if !strings.HasSuffix(f, "\n") { + f += "\n" + } + + return f +} + +// Headers queries the interface for field names +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 + } + headers[field.Name] = strings.ToUpper(field.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} +} diff --git a/cmd/podman/report/format_test.go b/cmd/podman/report/format_test.go new file mode 100644 index 000000000..7dd62e899 --- /dev/null +++ b/cmd/podman/report/format_test.go @@ -0,0 +1,35 @@ +package report + +import ( + "strings" + "testing" +) + +func TestNormalizeFormat(t *testing.T) { + cases := []struct { + format string + expected string + }{ + {"table {{.ID}}", "{{.ID}}\n"}, + {"table {{.ID}} {{.C}}", "{{.ID}}\t{{.C}}\n"}, + {"{{.ID}}", "{{.ID}}\n"}, + {"{{.ID}}\n", "{{.ID}}\n"}, + {"{{.ID}} {{.C}}", "{{.ID}} {{.C}}\n"}, + {"\t{{.ID}}", "\t{{.ID}}\n"}, + {`\t` + "{{.ID}}", "\t{{.ID}}\n"}, + {"table {{.ID}}\t{{.C}}", "{{.ID}}\t{{.C}}\n"}, + {"{{.ID}} table {{.C}}", "{{.ID}} table {{.C}}\n"}, + } + for _, tc := range cases { + tc := tc + + label := strings.ReplaceAll(tc.format, " ", "") + t.Run("NormalizeFormat/"+label, func(t *testing.T) { + t.Parallel() + actual := NormalizeFormat(tc.format) + if actual != tc.expected { + t.Errorf("Expected %q, actual %q", tc.expected, actual) + } + }) + } +} -- cgit v1.2.3-54-g00ecf