RE: [git-users] How do you find the latest "revision" of agit repo branch?

[Suu Quan]

Thanks to Konstantin and Gergely for the insight.

Ref: rebuild based on commit ID
I think I'm going to accept the risk of building again in those situations in 
the first implementation phase, with a note on improving it -with git diff- in 
phase 2.

I wonder if there is a Jenkins/Hudson plugin for git that took those situations 
into consideration.

-Original Message-
From: Konstantin Khomoutov [mailto:flatw...@users.sourceforge.net] 
Sent: Thursday, February 11, 2016 1:56 AM
To: git-users@googlegroups.com
Cc: Gergely Polonkai
Subject: Re: [git-users] How do you find the latest "revision" of agit repo 
branch?

On Thu, 11 Feb 2016 08:04:16 +0100
Gergely Polonkai <gerg...@polonkai.eu> wrote:

> even though the SHA1 commit ID can be looked at, a changing commit ID 
> doesn't mean changed code. What if you hat two commits since the last 
> build, one that adds a change and another that reverts it? You are 
> seeing the same code, yet you rebuild it.
> 
> If you don't have a decent build system that can do incremental 
> builds, you may want to stick with git diff. You already have the 
> previous build's commit ID, so you can do git diff old-id HEAD. If 
> anything changed, do a build. If you pass --stat to git diff, you will 
> get the list of changed files, so you can make a decision if you 
> really need to build (e.g. no build if only the README file changed.). 
> This technique may be actually applied to other VCSes.

I'd vote for this answer, too.

To the OP: it worth keeping in mind that in Subversion, revision numbers are 
repository-wide, so to say that if a revision has changed, the content of a 
branch has changed, too, is not really correct.

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Re: [git-users] How do you find the latest "revision" of agit repo branch?

[Konstantin Khomoutov]

On Thu, 11 Feb 2016 08:04:16 +0100
Gergely Polonkai  wrote:

> even though the SHA1 commit ID can be looked at, a changing commit ID
> doesn't mean changed code. What if you hat two commits since the last
> build, one that adds a change and another that reverts it? You are
> seeing the same code, yet you rebuild it.
> 
> If you don't have a decent build system that can do incremental
> builds, you may want to stick with git diff. You already have the
> previous build's commit ID, so you can do git diff old-id HEAD. If
> anything changed, do a build. If you pass --stat to git diff, you
> will get the list of changed files, so you can make a decision if you
> really need to build (e.g. no build if only the README file
> changed.). This technique may be actually applied to other VCSes.

I'd vote for this answer, too.

To the OP: it worth keeping in mind that in Subversion, revision
numbers are repository-wide, so to say that if a revision has changed,
the content of a branch has changed, too, is not really correct.

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Re: [git-users] How do you find the latest "revision" of agit repo branch?

[Gergely Polonkai]

Hello,

even though the SHA1 commit ID can be looked at, a changing commit ID
doesn't mean changed code. What if you hat two commits since the last
build, one that adds a change and another that reverts it? You are seeing
the same code, yet you rebuild it.

If you don't have a decent build system that can do incremental builds, you
may want to stick with git diff. You already have the previous build's
commit ID, so you can do git diff old-id HEAD. If anything changed, do a
build. If you pass --stat to git diff, you will get the list of changed
files, so you can make a decision if you really need to build (e.g. no
build if only the README file changed.). This technique may be actually
applied to other VCSes.

Best,
Gergely
On Feb 11, 2016 12:37 AM, "Suu"  wrote:

> Before I build/compile a git branch, I would like to know whether it has
> changed since the last time I built it.
> If no change, I won't bother to build.
>
> in Subversion, it's a "revision number" that identifies the whole set of
> source code at the time. If you commit another set of changes to the
> branch, you get a new "revision number"
>
> What is its equivalent in GIT? (commit SHA-1 number?)
>
> How do I get that value? (git log -p 1?)
>
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Re: [git-users] How do you find the latest "revision" of agit repo branch?

[Leam Hall]

Also, a free on-line book:   https://git-scm.com/book/en/v2

On 02/10/16 18:37, Suu wrote:

Before I build/compile a git branch, I would like to know whether it has
changed since the last time I built it.
If no change, I won't bother to build.

in Subversion, it's a "revision number" that identifies the whole set of
source code at the time. If you commit another set of changes to the
branch, you get a new "revision number"

What is its equivalent in GIT? (commit SHA-1 number?)

How do I get that value? (git log -p 1?)

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Re: [git-users] How do you find the latest "revision" of agit repo branch?

[Magnus Therning]

Suu writes:

> Before I build/compile a git branch, I would like to know whether it has 
> changed since the last time I built it.
> If no change, I won't bother to build.
>
> in Subversion, it's a "revision number" that identifies the whole set of 
> source code at the time. If you commit another set of changes to the 
> branch, you get a new "revision number"
>
> What is its equivalent in GIT? (commit SHA-1 number?)
>
> How do I get that value? (git log -p 1?)

git show-ref HEAD

will show you the shasum of HEAD. You can replace 'HEAD' by any other
ref (run `git show-ref` to see a list of them all).

/M

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Re: [git-users] How do you find the latest "revision" of agit repo branch?

[Leam Hall]

Hmm...depends. Yes, the git hash will be the same if you're on the same 
version. How manual do you want it to be? "git status" will show you the 
status but isn't manual.


You can "git log | head -1' for the commit hash, if that's what you 
want. For example:


git log | head -1
commit bfbe91980accf14820fddf1167351fd6dffc6a14



On 02/10/16 18:37, Suu wrote:

Before I build/compile a git branch, I would like to know whether it has
changed since the last time I built it.
If no change, I won't bother to build.

in Subversion, it's a "revision number" that identifies the whole set of
source code at the time. If you commit another set of changes to the
branch, you get a new "revision number"

What is its equivalent in GIT? (commit SHA-1 number?)

How do I get that value? (git log -p 1?)

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