Write out Geth version on start

[SteffenIvanhoe]

System information

Geth version: every
OS & Version: Windows/Linux/OSX
Commit hash : (if develop)

Expected behaviour

Write out the Geth version to console window on start as first line.

Actual behaviour

Version not identifiable.

Steps to reproduce the behaviour

Just start Geth in the console window.

Backtrace

[backtrace]

[bas-vk]

@fjl, maybe I'm misunderstanding @SteffenIvanhoe but this is a bug report and not a request for a new feature? The console should print something like this:

instance: Geth/v1.5.0-unstable-d9bb8179/linux/go1.6.2

I tried it on the Windows command prompt and powershell and in both cases it would print out the version. SteffenIvanhoe could you maybe explain a bit more what is the problem is?

[SteffenIvanhoe]

Sorry, this is a request and no bug report. If I start geth.exe on Windows it does not show a line containing a version id. I for example get

I0525 14:11:16.653102 ethdb/database.go:82] Alloted 128MB cache and 1024 file handles to C:\Users\Steffen\AppData\Roaming\Ethereum\chaindata
I0525 14:11:17.137917 ethdb/database.go:169] closed db:C:\Users\Steffen\AppData\Roaming\Ethereum\chaindata
I0525 14:11:17.144928 ethdb/database.go:82] Alloted 128MB cache and 1024 file handles to C:\Users\Steffen\AppData\Roaming\Ethereum\chaindata
I0525 14:11:17.310455 ethdb/database.go:82] Alloted 16MB cache and 16 file handles to C:\Users\Steffen\AppData\Roaming\Ethereum\dapp
I0525 14:11:17.317500 eth/backend.go:172] Protocol Versions: [63 62 61], Network Id: 1
I0525 14:11:17.318503 eth/backend.go:201] Blockchain DB Version: 3
I0525 14:11:17.320504 core/blockchain.go:206] Last header: #1580919 [53937543.] TD=21989251773569414589
I0525 14:11:17.321505 core/blockchain.go:207] Last block: #1580919 [53937543.] TD=21989251773569414589
I0525 14:11:17.322506 core/blockchain.go:208] Fast block: #1580919 [53937543.] TD=21989251773569414589
I0525 14:11:17.325509 p2p/server.go:311] Starting Server
I0525 14:11:19.002824 p2p/discover/udp.go:217] Listening, enode://f43657f52ec483b6c2b58438e0daf125ecff64dd6fb7dc97f3c5255658860b46a06e11abc5a9dc88d26086dba40a500de1bd6000cfa385433b45edde84d70fed@[::]:30303
I0525 14:11:19.009830 p2p/server.go:554] Listening on [::]:30303
I0525 14:11:19.009830 node/node.go:298] IPC endpoint opened: \\.\pipe\geth.ipc

I can find out the version with geth version but would prefer the program to start with an output line which identifies the version. This is especially helpful when working with and maintaining multiple geth versions. I'm used to seeing that self-identification behavior with many other command line tools and would like to see it in geth too. Is also helpful for protocol outputs redirected into files.

[fjl]

I agree that this would be nice to have, hence the feature label.

[fjl]

Fix released in 1.5.0.