Add --summarize for ls

[cyliu0]

To achieve the same goal as aws s3 ls --recursive --summarize --human-readable.

$ aws s3 ls s3://tmp --recursive --summarize --human-readable
2020-11-02 15:48:28  146 Bytes tmp/metadata
2020-11-02 15:48:25   95 Bytes tmp/test-schema-create.sql
2020-11-02 15:48:26  490 Bytes tmp/test.t-schema.sql
2020-11-02 15:48:26   11.1 MiB tmp/test.t.0.sql
2020-11-02 11:27:25  484 Bytes tmp/test.t1-schema.sql
2020-11-02 11:27:26    8.8 MiB tmp/test.t1.0.sql
2020-11-02 11:27:25  182 Bytes tmp/test.test-schema.sql

Total Objects: 7
   Total Size: 19.9 MiB

$ ./mc ls s3/tmp --recursive --summarize
[2020-11-02 15:48:28 CST]   146B tmp/metadata
[2020-11-02 15:48:25 CST]    95B tmp/test-schema-create.sql
[2020-11-02 15:48:26 CST]   490B tmp/test.t-schema.sql
[2020-11-02 15:48:26 CST]  11MiB tmp/test.t.0.sql
[2020-11-02 11:27:25 CST]   484B tmp/test.t1-schema.sql
[2020-11-02 11:27:26 CST] 8.8MiB tmp/test.t1.0.sql
[2020-11-02 11:27:25 CST]   182B tmp/test.test-schema.sql
Total Objects: 7
   Total Size: 20MiB

[harshavardhana]

I think I prefer the following style output

[2020-12-06 16:50:41 PST]     0B wego/
[2020-12-07 00:44:07 PST] 8.7KiB wego/2020-12-07/171607330645605.png
[2020-12-06 18:58:38 PST] 8.7KiB wego/2020-12-07/18311607309917728.png
[2020-12-06 16:50:42 PST] 105KiB wego/2020-12-07/31481607302239954.jpeg
[2020-12-07 00:44:34 PST] 8.7KiB wego/2020-12-07/33881607330673939.png
[2020-12-06 22:35:12 PST]  11KiB wego/2020-12-07/55721607322910849.docx
[2020-12-06 19:09:09 PST] 8.7KiB wego/2020-12-07/64931607310547415.png
[2020-12-06 19:09:28 PST] 8.7KiB wego/2020-12-07/66211607310567501.png
[2020-12-06 19:06:26 PST] 8.7KiB wego/2020-12-07/69091607310385503.png
[2020-12-06 22:39:54 PST] 3.7MiB wego/2020-12-07/71031607323193157.zip
[2020-12-06 16:50:44 PST]  12KiB wego/2020-12-07/71941607302243156.jpg
[2020-12-06 18:36:24 PST] 8.7KiB wego/2020-12-07/89751607308582600.png
[2020-12-06 21:51:56 PST] 7.7KiB wego/2020-12-07/test/test.png
[2020-12-06 22:41:41 PST] 7.7KiB wego/2020-12-07/test/test1.png
[2020-12-07 11:56:46 PST]     0B zfutkuzki/

Total Size: 2.7 GiB
Total Objects: 2850

With the following changes, AWS CLI output looks clumsy, we can make it look better.

git diff
diff --git a/cmd/ls-main.go b/cmd/ls-main.go
index 9686230d..df726b03 100644
--- a/cmd/ls-main.go
+++ b/cmd/ls-main.go
@@ -183,6 +183,7 @@ func mainList(cliCtx *cli.Context) error {
        console.SetColor("Dir", color.New(color.FgCyan, color.Bold))
        console.SetColor("Size", color.New(color.FgYellow))
        console.SetColor("Time", color.New(color.FgGreen))
+       console.SetColor("Summarize", color.New(color.Bold))
 
        // check 'ls' cliCtx arguments.
        args, isRecursive, isIncomplete, isSummary, timeRef, withOlderVersions := checkListSyntax(ctx, cliCtx)
diff --git a/cmd/ls.go b/cmd/ls.go
index 7899baa9..f1f99acd 100644
--- a/cmd/ls.go
+++ b/cmd/ls.go
@@ -179,8 +179,9 @@ type summaryMessage struct {
 
 // String colorized string message
 func (s summaryMessage) String() string {
-       message := console.Colorize("Total Objects", fmt.Sprintf("Total Objects: %d", s.TotalObjects)) + "\n" + console.Colorize("Total Size", fmt.Sprintf("%14s %s", "Total Size:", strings.Join(strings.Fields(humanize.IBytes(uint64(s.TotalSize))), "")))
-       return message
+       msg := console.Colorize("Summarize", fmt.Sprintf("\nTotal Size: %s", humanize.IBytes(uint64(s.TotalSize))))
+       msg += "\n" + console.Colorize("Summarize", fmt.Sprintf("Total Objects: %d", s.TotalObjects))
+       return msg
 }
 
 // JSON jsonified summary message
@@ -258,11 +259,10 @@ func doList(ctx context.Context, clnt Client, isRecursive, isIncomplete, isSumma
        printObjectVersions(clnt.GetURL(), perObjectVersions, withOlderVersions, isSummary)
 
        if isSummary {
-               sm := summaryMessage{
+               printMsg(summaryMessage{
                        TotalObjects: totalObjects,
                        TotalSize:    totalSize,
-               }
-               printMsg(sm)
+               })
        }
 
        return cErr

Thanks for the PR