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Git Essential Training

Editing files


From:

Git Essential Training

with Kevin Skoglund

Video: Editing files

In the last movie we reviewed how we add files to our Git repository. Now what we want to see is how to edit files and how to Git works with those edits. I have my git project, and I have my three files here, let's make some edits to one of these files. So let's pop up in first_file.txt, it's called, This is the first file that I added to my project. So we've made an edit to it, let's save our change and close it. So now that change has been made to first_file.txt.
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  1. 2m 46s
    1. Introduction
      1m 7s
    2. How to use the exercise files
      1m 39s
  2. 20m 24s
    1. Understanding version control
      4m 48s
    2. The history of Git
      7m 58s
    3. About distributed version control
      5m 4s
    4. Who should use Git?
      2m 34s
  3. 26m 12s
    1. Installing Git on a Mac
      3m 44s
    2. Installing Git on Windows
      5m 37s
    3. Installing Git on Linux
      1m 30s
    4. Configuring Git
      7m 29s
    5. Exploring Git auto-completion
      5m 35s
    6. Using Git help
      2m 17s
  4. 15m 49s
    1. Initializing a repository
      1m 58s
    2. Understanding where Git files are stored
      2m 34s
    3. Performing your first commit
      2m 4s
    4. Writing commit messages
      5m 22s
    5. Viewing the commit log
      3m 51s
  5. 17m 44s
    1. Exploring the three-trees architecture
      3m 57s
    2. The Git workflow
      3m 15s
    3. Using hash values (SHA-1)
      4m 7s
    4. Working with the HEAD pointer
      6m 25s
  6. 25m 52s
    1. Adding files
      5m 59s
    2. Editing files
      3m 56s
    3. Viewing changes with diff
      3m 35s
    4. Viewing only staged changes
      2m 28s
    5. Deleting files
      5m 29s
    6. Moving and renaming files
      4m 25s
  7. 19m 18s
    1. Introducing the Explore California web site
      2m 2s
    2. Initializing Git
      3m 48s
    3. Editing the support phone number
      6m 20s
    4. Editing the backpack file name and links
      7m 8s
  8. 38m 45s
    1. Undoing working directory changes
      3m 49s
    2. Unstaging files
      2m 37s
    3. Amending commits
      4m 50s
    4. Retrieving old versions
      4m 7s
    5. Reverting a commit
      3m 12s
    6. Using reset to undo commits
      3m 44s
    7. Demonstrating a soft reset
      4m 8s
    8. Demonstrating a mixed reset
      4m 7s
    9. Demonstrating a hard reset
      5m 8s
    10. Removing untracked files
      3m 3s
  9. 27m 22s
    1. Using .gitignore files
      8m 23s
    2. Understanding what to ignore
      4m 47s
    3. Ignoring files globally
      4m 49s
    4. Ignoring tracked files
      5m 26s
    5. Tracking empty directories
      3m 57s
  10. 26m 51s
    1. Referencing commits
      4m 52s
    2. Exploring tree listings
      3m 46s
    3. Getting more from the commit log
      7m 38s
    4. Viewing commits
      4m 4s
    5. Comparing commits
      6m 31s
  11. 39m 35s
    1. Branching overview
      4m 56s
    2. Viewing and creating branches
      2m 57s
    3. Switching branches
      2m 58s
    4. Creating and switching branches
      4m 53s
    5. Switching branches with uncommitted changes
      3m 26s
    6. Comparing branches
      4m 28s
    7. Renaming branches
      2m 28s
    8. Deleting branches
      4m 18s
    9. Configuring the command prompt to show the branch
      9m 11s
  12. 28m 32s
    1. Merging code
      3m 11s
    2. Using fast-forward merge vs. true merge
      6m 49s
    3. Merging conflicts
      7m 26s
    4. Resolving merge conflicts
      7m 5s
    5. Exploring strategies to reduce merge conflicts
      4m 1s
  13. 14m 34s
    1. Saving changes in the stash
      4m 5s
    2. Viewing stashed changes
      2m 39s
    3. Retrieving stashed changes
      4m 24s
    4. Deleting stashed changes
      3m 26s
  14. 1h 5m
    1. Using local and remote repositories
      6m 38s
    2. Setting up a GitHub account
      5m 39s
    3. Adding a remote repository
      4m 0s
    4. Creating a remote branch
      4m 3s
    5. Cloning a remote repository
      4m 26s
    6. Tracking remote branches
      4m 5s
    7. Pushing changes to a remote repository
      5m 8s
    8. Fetching changes from a remote repository
      5m 47s
    9. Merging in fetched changes
      4m 50s
    10. Checking out remote branches
      3m 22s
    11. Pushing to an updated remote branch
      2m 6s
    12. Deleting a remote branch
      3m 8s
    13. Enabling collaboration
      3m 40s
    14. A collaboration workflow
      8m 43s
  15. 16m 23s
    1. Setting up aliases for common commands
      5m 14s
    2. Using SSH keys for remote login
      2m 56s
    3. Exploring integrated development environments
      1m 4s
    4. Exploring graphical user interfaces
      4m 32s
    5. Understanding Git hosting
      2m 37s
  16. 55s
    1. Goodbye
      55s

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Git Essential Training
6h 26m Beginner Aug 24, 2012

Viewers: in countries Watching now:

The course shows how to use Git, the popular open-source version control software, to manage changes to source code and text files. Using a step-by-step approach, author Kevin Skoglund presents the commands that enable efficient code management and reveals the fundamental concepts behind version control systems and the Git architecture. Discover how to track changes to files in a repository, review previous edits, and compare versions of a file; create branches to test new ideas without altering the main project; and merge those changes into the project if they work out. The course begins by demonstrating version control in a single-user, standalone context, before exploring how remote repositories allow users to collaborate on projects effectively.

Topics include:
  • Exploring the history of version control
  • Installing Git on Mac, Windows, and Linux
  • Initializing a repository
  • Writing useful commit messages
  • Understanding the Git three-tree architecture
  • Tracking when files are added, edited, deleted, or moved
  • Viewing change sets and comparing versions
  • Undoing changes and rolling back to previous versions
  • Ignoring changes to select files
  • Creating and working with code branches
  • Merging branches and resolving merge conflicts
  • Stashing changes for later
  • Working with hosted repositories and remote branches
  • Developing an effective collaboration workflow
Subject:
Developer
Software:
Git GitHub
Author:
Kevin Skoglund

Editing files

In the last movie we reviewed how we add files to our Git repository. Now what we want to see is how to edit files and how to Git works with those edits. I have my git project, and I have my three files here, let's make some edits to one of these files. So let's pop up in first_file.txt, it's called, This is the first file that I added to my project. So we've made an edit to it, let's save our change and close it. So now that change has been made to first_file.txt.

Now when we come back over to our command line we say git status now it comes up and it tells me, owe something is changed. Changes that are not staged for commit essentially just changes, and it tells me you've modified first_file.txt. Remember before I said there were untracked files, this is different. It's telling us about changes and tells us what those changes are, you've modified first_file.txt, if you want to add it, Git add it with add it, and then it tell us how we can discard those changes, which we will take a look at a little later.

Adding it is exactly the same process for a new file versus a changed file. Essentially it's the process of moving it from our working directory into the staging directory, git add first_file.txt. It will now add that change to our staging directory, git status, clear it so you can see it. Now it says changes to be committed is the modified file first_file.txt. Now before we make that change, and we commit that, let's make some more changes, second_file.

This is the second file that I added to my project, and let's go ahead and open up third_file. This is the third file that I added to my project. So now we've got all three of those, let's now take a look at git status and see what's going on now. It's got still the thing that I changed in the staging directory first_file still there ready to be committed it also notes the new changes that I made those are new in the staging directory yet.

If I want to put those in the staging directory if I want to package them as this next commit then I need to add them. So let's say that I want to do that with the second file git add second_file.txt. Now if I do git status, you'll see that two files are listed as being modified, ready to be committed, one file is still in my working directory, I haven't added it to my staging directory yet it just notes the fact that it's changed, that it's different from what's in the repository. So let's do a git commit with a message, and we're going to say made changes to first and second files.

So now it makes note of that change git status, clear the screen so you can see it, and you'll see that it's still tracking the changes for that third file, it took those first two, packaged them up together as a snap shot, sent them to my repository, git log, and we see there it is. Now here is the new commit that it just made. So that's all there is to being able to add files and edit files, it's the same process for both of them. We can say git status, and we can see the changes git add, and we can then put the file name that we want to add--doesn't matter if it's a new file or an edited file--and then finally git commit with the commit message telling it, Modified the text of the third file, and now it's in the repository as well just like that git status, git add, git commit.

These are the basic steps that we're going to be using with Git. Now what if before you made the commit you wanted to remind yourself what did you change any to these files maybe you were surprised that one of them came up as being changed. How can we see what those changes are? We'll look at that in the next movie.

Find answers to the most frequently asked questions about Git Essential Training.


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Q: In the Chapter 10 movie "Configuring the command prompt to show the branch," when I type the function "__git_ps1," I do not get the expected result.
A: The function "__git_ps1" was recently moved to a new file, .git-prompt.sh, as described here: https://github.com/git/git/commit/af31a456b4cd38f2630ed8e556e23954f806a3cc.

We will update the video. In the meantime, you may do the same steps you do for .git-completion.bash, but a second time using ".git-prompt.sh" as shown here: https://github.com/git/git/blob/master/contrib/completion/git-prompt.sh.
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