To register a project as a local Git repository the first thing you need to do is perform the following command at your **project root**:

    git init

This will create a `.git` folder at your project root and will allow you to start using Git in that repository.

----------

If you want to &quot;push&quot; your local Git repository to a remote Git server (in your case, to GitLab), you&#39;ll need to perform the following command first:

    git remote add origin &lt;Repository_Location&gt;

You can call `origin` whatever you like, really, but `origin` is the standard name for Git remote repositories. `&lt;Repository_Location&gt;` is the URL to your remote repository. For example, if I had a new project called `MyNewProject` that I wanted to push to GitLab, I&#39;d perform:

    git remote add origin https://gitlab.com/Harmelodic/MyNewProject.git

You can then &quot;push&quot; your changes from your local machine to your remote repo using the following command:

    git push origin &lt;branch_name&gt;

where branch name is the name of the branch you want to push, e.g. `master`.

----------

You can find a [good beginners guide to Git here][1].


  [1]: https://git-scm.com/book/en/v2/Getting-Started-Git-Basics

Idk if necessary, but I&#39;ve always named my local folder the same as the remote repo.  

Also, prior to a git push, I try to 

&quot;git pull origin master&quot;

in order to get the latest code in the repository.  Then I can port in my changes and commit.

total text from GitHub:

echo &quot;# xyz_repo&quot; &gt;&gt; README.md

git init

git add README.md

git commit -m &quot;first commit&quot;

git branch -M main

git remote add origin 

https://github.com/mikeyj777/Coursera_DataStructsAndAlgos.git

git push -u origin main


What&#39;s the best way to determine if an expression is a rvalue or lvalue in C++? Probably, this is not useful in practice but since I am learning rvalues and lvalues I thought it would be nice to have a function `is_lvalue` which returns true if the expression passed in input is a lvalue and false otherwise. 

Example:

    std::string a(&quot;Hello&quot;);
    is_lvalue(std::string()); // false
    is_lvalue(a); // true  



How to determine programmatically if an expression is rvalue or lvalue in C++?

**Goal**: Load an image with a dynamic source.  If no image is found, then load a placeholder image instead.

This should demonstrate what I&#39;m trying to do, but I don&#39;t know how to conditionally set `validImage` based on whether the first `img` `src` is valid. 

    &lt;img *ngif=&quot;validImage&quot; class=&quot;thumbnail-image&quot; src=&quot;./app/assets/images/{{image.ID}}.jpg&quot; alt=&quot;...&quot;&gt;
    &lt;img *ngif=&quot;!validImage&quot; class=&quot;thumbnail-image&quot; src=&quot;./app/assets/images/placeholder.jpg&quot; alt=&quot;...&quot;&gt;

`validImage` should be `true` if `src=&quot;./app/assets/images/{{image.ID}}.jpg&quot;` returns an image.  Otherwise it would return `false` and only the second `img` tag should show.

There are obvious work arounds like storing a list of all valid image sources, but I&#39;m thinking there is a better way to accomplish this. 

Any suggestions on the best way to implement this in Angular2 would be greatly appreciated.

Angular2: Show placeholder image if img src is not valid

I&#39;m new to source control; in the past, I&#39;ve manually backed up copies of files and made changes on clones then transferred changes manually to master files once debugged. I realize this is similar to how branches work with Git repositories, however I&#39;ve never used one.

I downloaded Git and made an account on GitLab, and started a new project. My site is hosted on a local server and my files are saved locally. How do I connect these files to a Git repository and continue developing with branches?

How to connect local folder to Git repository and start making changes on branches?

<p>I'm new to source control; in the past, I've manually backed up copies of files and made changes on clones then transferred changes manually to master files once debugged. I realize this is similar to how branches work with Git repositories, however I've never used one.</p>
<p>I downloaded Git and made an account on GitLab, and started a new project. My site is hosted on a local server and my files are saved locally. How do I connect these files to a Git repository and continue developing with branches?</p>


I tried to follow [this post][1] but got confused rather than getting my problem solved. 

Here is the scenario. 

I have created a branch like `git checkout -b &lt;branch_name&gt;`. I then worked on some changes and did

1. `git add .`
2. `git commit -m &quot;comment&quot;`

Now all those changes are in my uncommitted local `&lt;branch_name&gt;` branch. What i want to do is to push these changes upstream but i want to push it to a branch which doesn&#39;t exist e.g., `&lt;branch_name&gt;_test`

I don&#39;t want to push it to my `&lt;branch_name&gt;`. How can i do so. 


  [1]: https://stackoverflow.com/questions/1519006/how-do-you-create-a-remote-git-branch

Git pushing to remote branch

I&#39;m a noob in Git, and trying to learn the difference between `git pull` vs `git rebase`. Can someone provide an example when to use which option since I feel that both serve the same purpose.

Git Pull vs Git Rebase

I did a pull request but after that I made some commits to the project locally which ended polluting my pull request, I tried to remove it but without any luck.

I found some similar questions on StackOverflow but I can&#39;t apply what&#39;s in there.
It&#39;s my first pull request on GitHub so it&#39;s kinda strange to me how all of this works.

The highlighted commit is the one I need to keep and remove all the other stuff.
It becomes the fourth commit in the history because I make some merge stuff.

[![enter image description here][1]][1]

my git log
[![enter image description here][2]][2]

Can someone please explain what&#39;s going on and how to fix this problem? 


  [1]: http://i.stack.imgur.com/rapAX.png
  [2]: http://i.stack.imgur.com/Ja84G.png

How to remove commits from a pull request

As the title says: I&#39;m checking a Jupyter notebook into a GitHub repo, should I store the `.ipynb_checkpoints` folder in GitHub too, or are they best `.gitignore`d and kept locally?

I&#39;m not really sure what they are for, so I don&#39;t know whether to include them or not. 

Should ipynb checkpoints be stored in Git?

I have two branches - A and B. B was created from A.

Work on both branches continued in parallel. Work on branch A was bad (resulting in a non-working version) while work on branch B was good. During this time branch B was sometimes merged into branch A (but not the other way around).

Now I want to make branch A identical to branch B. I can&#39;t use git revert because I need to revert too many commits - I only want to revert the commits that were done on branch A but not as a result of merging branch B.

The solution I found was to clone branch B into a another folder, delete all the files from the working folder of branch A, copy the files from the temp branch B folder and add all untracked files.

Is there a git command that does the same thing? Some git revert switch I missed?

Making two branches identical

##I&#39;m very confused about git-submodules.
Basically my problem is that I can&#39;t make git understand that `~/main-project/submodule` is a submodule.

--------
**I have good experience with git submodules:**&lt;br&gt;
in my [dotfiles repository][1] I created the .gitmodules file in `~/dotfiles-repo` and I added there paths and urls. Since then, If I make changes to the files within the submodules and run `git status`, I&#39;d get something like like: `.vim/bundle/auto-complete (new commits) # in red`

I created the `.gitmodules` file in `~/main-project` but:

 - If I make changes to `~/main-project/submodule` and even push the changes, I don&#39;t get a similar response like `&lt;submodule&gt; (new commits) # in red` when running `git status` in `~/main-project`. **I just get the changes that were made in those directories**
 - When I hit the folders&#39; links at `github` for these directories it&#39;s not directing me to the repositories themselves but I stay in the same repository.

 1. Maybe I&#39;m missing the whole point. What are the main features of submodules?
 2. Why does git understands the submodules in [the dotfiles repo][2] but not [in my other repo][3]?
 3. Is it because I have already told git to add the files inside `~/main-project/submodule` to the index?

I&#39;ve read [this question][4] which led me to [this answer][5] But I&#39;m not sure I need `git-subtree`. I don&#39;t want to do things that might do changes hard to be revert.

&gt; Edit: [This suggested duplicate-solution][6] didn&#39;t work either, I recieved an error that `Updates were rejected because the remote contains work that you do not have locally`. It seems that [@GabLeRoux][7] practically told me to push `&lt;repo-A&gt;` to the url of `&lt;repo-B&gt;`.


  [1]: https://github.com/Doron-Behar/dotfiles
  [2]: https://github.com/Doron-Behar/dotfiles/tree/master/.vim/bundle
  [3]: https://github.com/Doron-Behar/RFID-entry-permissions-sys
  [4]: https://stackoverflow.com/questions/1593620/how-to-make-part-of-an-existing-git-repository-a-submodule
  [5]: https://stackoverflow.com/questions/920165/howto-extract-a-git-subdirectory-and-make-a-submodule-out-of-it/1307969#1307969
  [6]: https://stackoverflow.com/questions/17413493/create-a-submodule-repository-from-a-folder-and-keep-its-git-commit-history
  [7]: https://stackoverflow.com/users/1092815/gableroux

How to make an existing directory within a git repository a git submodule

I just signed up with Firebase and I created a new project. Firebase asked me for my app domain and a SHA1 debug key. I input these details and it generated a google-services.json file for me to add in the root of my app module.

My question is, should this .json file be added to a public (open source) repo. Is it something that should be secret, like an API key?

Should I add the google-services.json (from Firebase) to my repository?

Let&#39;s imagine the [blerp](http://xkcd.com/1692/) command line tool maintained on [tag:Git]. This tool has the (hidden) `--version` option which returns its [version](https://en.wikipedia.org/wiki/Software_versioning) (let&#39;s say `0.1.2`) and another `--commit` which returns the commit number from which it was built. 

Both the version and the commit number are hard-coded on the code base. 

Now I make a bugfix then commit and rebuild my program. I will still see `0.1.2` although this new version differ from the original 0.1.2. Only the commit will tell me that it is not the same 0.1.2. Is that bugfix worth a different version number? 

One solution is that each time I make a commit, I increase the hard-coded version number (which implies to always modify a minimum of 2 files for each commit). This is a binding solution and it does not work when the developers are working on different active branches. If Bob works on feature `foo` from the version `0.1.2` and Alice works on feature `bar` from the same version. How do they increase their version number? Bob can use the odd and Alice the even. What if Eve works on a third feature?

Another solution can be to use the Git tags to automatically generate the version number. A script can find the closest tag starting with `v` such as `v0.1.2` and use the tag name as the version number plus the first n digits of the current commit (`v0.1.2 (build 4acd21)`). This works well if the working directory is clean. One can imagine to add a `*` before the build number to indicate the working directory is not clean. The main problem with this solution is if somebody export the sources, it won&#39;t be able to build *blerp*.

What possible alternative can solve this issue?







How to manage the version number in Git?

I have 3 modified files (no new files) in a pull request at the moment. 

I would like to remove one of those files from the pull request, so that the pull request only contains changes to two files and leaves the third in its original, untouched state. 

I have tried a couple things (checking out the original version of the file, etc...) but it still shows as a changed file in the PR.

Is there a solution to this?

Remove a modified file from pull request

I&#39;m developing a Spring Boot application with Spring Data JPA. I&#39;m using a custom JPQL query to group by some field and get the count. Following is my repository method.

    @Query(value = &quot;select count(v) as cnt, v.answer from Survey v group by v.answer&quot;)
    public List&lt;?&gt; findSurveyCount();

It&#39;s working and result is obtained as follows:

    [
      [1, &quot;a1&quot;],
      [2, &quot;a2&quot;]
    ]

I would like to get something like this:

    [
      { &quot;cnt&quot;:1, &quot;answer&quot;:&quot;a1&quot; },
      { &quot;cnt&quot;:2, &quot;answer&quot;:&quot;a2&quot; }
    ]

How can I achieve this?

How to return a custom object from a Spring Data JPA GROUP BY query

After installing Nexus Repository Manager OSS 3 I do not see option `Artifact Upload` to upload artifacts through web page.

In Nexus Repository Manager OSS 2.13 there is option to do that operation.

Anyone can show me the way how to upload artifacts to hosted repository in Nexus 3?

**EDIT**: *From 3.9.0 version, this functionality is implemented.*

How to manually deploy artifacts in Nexus Repository Manager OSS 3

Lately I have been using GitHub and I am wondering what is the repository size limit for files hosted on github.com?  I have been wondering this because I was thinking of using GitLab, since it allows 10 GB for each repository.

Repository size limits for GitHub.com

In GitHub, what is the conceptual difference between a project (that can be created inside a repository) and a repository? 

I&#39;ve seen several similar questions ([here][1], [here][2] and [here][3]) in SO, but none of them explains what is a GitHub project, what is a GitHub repository and when to use each one of them. 

I would appreciate if someone can explain each term, and provide an example of when to use/create each one. For instance, if I have several prototype applications, all independent of each other, what do I create in order to manage in an organized way the source code for all of them? 

  [1]: https://stackoverflow.com/q/5043306/2316433
  [2]: https://stackoverflow.com/q/21692155/2316433
  [3]: https://stackoverflow.com/q/35881291/2316433

Project vs Repository in GitHub

If I&#39;m using Alpine 3.8, how can I add a specific package from the Alpine Edge repository? Is this even supported? There is no equivalent of backports, from what I can see.

I want to add the new version of this: https://pkgs.alpinelinux.org/package/edge/community/armhf/librdkafka

And not the older version in the 3.8 repo:
https://pkgs.alpinelinux.org/package/v3.8/community/s390x/librdkafka

Alpine Add Package from Edge repository

i&#39;m use centos 5.9.
after installing gitlab by this [link][1] ssh not working.
before install gitlab ssh correctly working.
i&#39;m using this server localy and other services such as elastix and apache,mysql installed on server.

appeare this error :

    
    OpenSSH_6.9p1 Ubuntu-2ubuntu0.1, OpenSSL 1.0.2d 9 Jul 2015
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: /etc/ssh/ssh_config line 19: Applying options for *
    debug2: ssh_connect: needpriv 0
    debug1: Connecting to 192.168.88.23 [192.168.88.23] port 22.
    debug1: Connection established.
    debug1: permanently_set_uid: 0/0
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_rsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_rsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_dsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_dsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_ecdsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_ecdsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_ed25519 type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /root/.ssh/id_ed25519-cert type -1
    debug1: Enabling compatibility mode for protocol 2.0
                                            debug1: Local version string SSH-2.0-OpenSSH_6.9p1 Ubuntu-2ubuntu0.1
    debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
    debug1: match: OpenSSH_4.3 pat OpenSSH_4* compat 0x00000000
    debug2: fd 3 setting O_NONBLOCK
    debug1: Authenticating to 192.168.88.23:22 as &#39;root&#39;
    debug1: SSH2_MSG_KEXINIT sent
    debug1: SSH2_MSG_KEXINIT received
    debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
    debug2: kex_parse_kexinit: ssh-rsa-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-dss-cert-v00@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss
    debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
    debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
    debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
    debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
    debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
    debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
    debug2: kex_parse_kexinit: 
    debug2: kex_parse_kexinit: 
    debug2: kex_parse_kexinit: first_kex_follows 0 
    debug2: kex_parse_kexinit: reserved 0 
    debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
    debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
    debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
    debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
    debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
    debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
    debug2: kex_parse_kexinit: none,zlib@openssh.com
    debug2: kex_parse_kexinit: none,zlib@openssh.com
    debug2: kex_parse_kexinit: 
    debug2: kex_parse_kexinit: 
    debug2: kex_parse_kexinit: first_kex_follows 0 
    debug2: kex_parse_kexinit: reserved 0 
    debug1: kex: server-&gt;client aes128-ctr hmac-sha1 none
    debug1: kex: client-&gt;server aes128-ctr hmac-sha1 none
    debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024&lt;7680&lt;8192) sent
    debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
    debug2: bits set: 3111/6144
    debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
    debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
    debug1: Server host key: ssh-rsa SHA256:7J6JOe94H9PedNKlx6yG/wMy6ZYC8iB74WdOVGDgY7A
    debug1: Host &#39;192.168.88.23&#39; is known and matches the RSA host key.
        debug1: Found key in /root/.ssh/known_hosts:1
    debug2: bits set: 3102/6144
    debug2: set_newkeys: mode 1
    debug1: SSH2_MSG_NEWKEYS sent
    debug1: expecting SSH2_MSG_NEWKEYS
    debug2: set_newkeys: mode 0
    debug1: SSH2_MSG_NEWKEYS received
    debug1: SSH2_MSG_SERVICE_REQUEST sent
    debug2: service_accept: ssh-userauth
    debug1: SSH2_MSG_SERVICE_ACCEPT received
    debug2: key: /root/.ssh/id_rsa ((nil)),
    debug2: key: /root/.ssh/id_dsa ((nil)),
    debug2: key: /root/.ssh/id_ecdsa ((nil)),
    debug2: key: /root/.ssh/id_ed25519 ((nil)),
    debug1: Authentications that can continue: publickey,gssapi-with-mic
    debug1: Next authentication method: gssapi-with-mic
    debug1: Unspecified GSS failure.  Minor code may provide more information
    No Kerberos credentials available
    
    debug1: Unspecified GSS failure.  Minor code may provide more information
    No Kerberos credentials available
    
    debug1: Unspecified GSS failure.  Minor code may provide more information
    
    
    debug1: Unspecified GSS failure.  Minor code may provide more information
    No Kerberos credentials available
    
    debug2: we did not send a packet, disable method
    debug1: Next authentication method: publickey
    debug1: Trying private key: /root/.ssh/id_rsa
    debug1: Trying private key: /root/.ssh/id_dsa
    debug1: Trying private key: /root/.ssh/id_ecdsa
    debug1: Trying private key: /root/.ssh/id_ed25519
    debug2: we did not send a packet, disable method
    debug1: No more authentication methods to try.
    Permission denied (publickey,gssapi-with-mic).


  [1]: https://github.com/zzhgjmh/gitlab-centos/blob/master/gitlab-centos5.9.sh


ssh : Permission denied (publickey,gssapi-with-mic)

I want to create a public repo to put some sample files from my main repo (private). Is there any way to soft link few folders from a git repo to another git repo?

How to link folder from a git repo to another repo?

We are working on integrating GitLab (enterprise edition) in our tooling, but one thing that is still on our wishlist is to create a merge request in GitLab via a command line (or batchfile or similar, for that matter). We would like to integrate this in our tooling. Searching here and on the web lead me to believe that this is not possible with native GitLab, but that we need additional tooling for that. 

Am I correct? And what kind of tooling would I want to use for this?

How to create a GitLab merge request via command line

What is the difference between Jenkins and other CI like GitLab CI, drone.io coming with the Git distribution. On some research I could only come up that GitLab community edition doesn&#39;t allow Jenkins to be added, but GitLab enterprise edition does. Are there any other significant differences?


GitLab CI vs. Jenkins

I have two remote: upstream and origin. upstream is something I can&#39;t push to. origin is my own repo. How can I fetch all branches from upstream and then push them to origin?
I tried:

    git fetch upstream
    git push --all origin
But it doesn&#39;t work.

Content Type	Original Author	Original Content on Stackoverflow
Question	codr	View Question on Stackoverflow
Solution 1 - Git	Harmelodic	View Answer on Stackoverflow
Solution 2 - Git	Michael James	View Answer on Stackoverflow

How to connect local folder to Git repository and start making changes on branches?

Git Problem Overview

Git Solutions

Solution 1 - Git

Solution 2 - Git

Angular2: Show placeholder image if img src is not valid

How to determine programmatically if an expression is rvalue or lvalue in C++?

Attributions