How to retrieve a single file from specific revision in Git?


How to retrieve a single file from specific revision in Git?



I have a Git repository and I'd like to see how some file looked a few months ago. I found the revision at that date, it's: 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8. I need to see what did one file look like and also save that to a file.

I managed to see the file using gitk, but it doesn't have an option to save it. I tried with command line tools, the closest I got was:

git-show 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8 my_file.txt 

However, this command shows a diff and not the file contents. I know I can later use something like PAGER=cat and redirect output to a file, but I don't know how to get to the actual file content.

Basically, I'm looking for something like svn cat.




Maintaining unrelated directories in one git repository

1:



How do I prevent autotools from re-generating configure script automatically?
To complete your own answer, the syntax is indeed.
what are the pros & cons of Git and Hg Version Control System?
git show object git show $REV:$FILE git show somebranch:from/the/root/myfile.txt git show HEAD^^^:test/test.py 
The command takes the usual style of revision, meaning you can use any of the following:.
Use 'pull' or 'merge' to merge local branches?
  1. branch name (as suggested by ash)
  2. HEAD + x number of ^ characters
  3. The SHA1 hash of a given revision
  4. The first few (maybe 5) characters of a given SHA1 hash
Tip It's important to remember that when using "git show", always specify a path from the root of the repository, not your current directory position.


In git, can you view the older commits applied to a file after it has been moved?
.
How to efficiently rebase and push a local git branch?
(Although Mike Morearty mentions that, at least with git 1.7.5.4, you can specify a relative path by putting "./" at the beginning of the path -- for example:.
Git checkout: updating paths is incompatible with switching branches
git show HEAD^^:./test.py 
).
Why does git push sometimes need a localref argument?
Before git1.5.x, that was done with some plumbing:. git ls-tree <rev>
show a list of one or more 'blob' objects within a commit. git cat-file blob <file-SHA1>
cat a file as it has been committed within a specific revision (similar to svn cat).

use git ls-tree to retrieve the value of a given file-sha1 .
git cat-file -p $(git-ls-tree $REV $file | cut -d " " -f 3 | cut -f 1):: 
git-ls-tree lists the object ID for $file in revision $REV, this is cut out of the output and used as an argument to git-cat-file, which should really be called git-cat-object, and simply dumps that object to stdout.. Note: since Git 2.11 (Q4 2016), you can apply a content filter to the git cat-file output!. See commit 3214594, commit 7bcf341 (09 Sep 2016), commit 7bcf341 (09 Sep 2016), and commit b9e62f6, commit 16dcc29 (24 Aug 2016) by Johannes Schindelin (dscho).
(Merged by Junio C Hamano -- gitster -- in commit 7889ed2, 21 Sep 2016) .

cat-file: support --textconv/--filters in batch mode

Even though "git hash-objects", which is a tool to take an on-filesystem data stream and put it into the Git object store, allowed to perform the "outside-world-to-Git" conversions (e.g.

end-of-line conversions and application of the clean-filter), and it had the feature on by default from very early days, its reverse operation "git cat-file", which takes an object from the Git object store and externalize for the consumption by the outside world, lacked an equivalent mechanism to run the "Git-to-outside-world".
git config diff.txt.textconv "tr A-Za-z N-ZA-Mn-za-m <" git cat-file --textconv --batch 


2:


The following worked for me:.
git checkout 08618129e66127921fbfcbc205a06153c92622fe -- [full/path] 
To clarify with an example:.
git checkout mybranchname ~/src/myapp/myfile.txt 


3:


You need to provide full path to the file:.
git show 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8:full/repo/path/to/my_file.txt 


4:


The easiest way is to write:.
git show HASH:file/path/name.ext > some_new_name.ext 
WHERE:.
  • HASH is the git revision SHA1 hash number
  • file/path/name.ext is name of the file you are looking for
  • some_new_name.ext is path and name where the old file should be saved
EXAMPLE:.
git show 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8:my_file.txt > my_file.txt.OLD 
This will save my_file.txt from revision b0d78b4 as a new file with name my_file.txt.OLD. Tested with GIT 2.4.5. If you want to retrieve deleted file you can use HASH~1 (one commit before specified HASH).. EXAMPLE:.
git show 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8~1:deleted_file.txt > deleted_file.txt 


5:


And to nicely dump it into a file (in windows at least) - git Bash:.
$ echo "`git show 60d8bdfc:src/services/LocationMonitor.java`" >> LM_60d8bdfc.java 
the " quotes are needed so it preserves newlines.


6:


In Windows, with Git Bash:.
  • in your workspace, change dir to the folder where your file lives
  • git show cab485c83b53d56846eb883babaaf4dff2f2cc46:./your_file.ext > old.ext


7:


This will help you get all deleted files between commits without specifying the path, useful if there are a lot of files deleted..
git diff --name-only --diff-filter=D $commit~1 $commit | xargs git checkout $commit~1 


8:


Get the file from a previous commit through checking-out previous commit and copying file..
  • Note which branch you are on: git branch
  • Checkout the previous commit you want: git checkout 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8
  • Copy the file you want to a temporary location
  • Checkout the branch you started from: git checkout theBranchYouNoted
  • Copy in the file you placed in a temporary location
  • Commit your change to git: git commit -m "added file ?? from previous commit"



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