How to checkout only the changes

[h***@gmx.de]

[Ryan Schmidt]

Is there a way to export only the changes, that occured in a specific revision? Like export or checkout only the added or modified files in their respective paths? Deletions and cheap copies cannot be treated that way, obviously. Please CC as I am not subscribed.

There's no built-in command to do that.

[h***@gmx.de]

Post by Ryan Schmidt

Is there a way to export only the changes, that occured in a specific revision? Like export or checkout only the added or modified files in their respective paths? Deletions and cheap copies cannot be treated that way, obviously. Please CC as I am not subscribed.

There's no built-in command to do that.

Maybe somebody wrote a script for this?

I'd like to index these files, but I don't want to index the same files
again and again.

[Mark Phippard]

Post by h***@gmx.de

Is there a way to export only the changes, that occured in a specific

revision? Like export or checkout only the added or modified files in their
respective paths? Deletions and cheap copies cannot be treated that way,
obviously. Please CC as I am not subscribed.

There's no built-in command to do that.
Maybe somebody wrote a script for this?

I'd like to index these files, but I don't want to index the same files
again and again.

You could maintain a working copy and just run svn update and scrape the
output to identify changes. Otherwise you need to run svn log -v with a
script and then use svn cat to get the individual files.

[Andrew Reedick]

Sent: Friday, March 24, 2017 4:04 PM
Subject: How to checkout only the changes
Is there a way to export only the changes, that occured in a specific revision? Like export or checkout only the added or modified files in their respective paths? Deletions and cheap copies cannot be treated that way, obviously. Please CC as I am not subscribed.

FYI, 'svn copy' counts as an Add. That may or may not be a concern?

Mostly Untested But Seems to Work in the Average Case(tm), so user beware:

#!/bin/bash

# usage: foo.sh 1234 http://svn_server/repo_name
REV=$1
SVNREPO=$2

svn log -qv -r $REV $SVNREPO

# Yes we're grepping on XML because :laziness:
# And we're using perl because I can't be bothered with sed/awk subtleties
svn log -qv --xml -r $REV "$SVNREPO" | perl -ne 'chomp; $a=1 if /^ action="[AD]"/; print "$1\n" if ( $a && /^ kind="file">(.*)<\/path>/ ); $a=0 if /<\/path>/;' | while read i
do
D=./`dirname "$i"`
mkdir -p "$D"
svn ex

[h***@gmx.de]

Post by Andrew Reedick

Sent: Friday, March 24, 2017 4:04 PM
Subject: How to checkout only the changes
Is there a way to export only the changes, that occured in a specific revision? Like export or checkout only the added or modified files in their respective paths? Deletions and cheap copies cannot be treated that way, obviously. Please CC as I am not subscribed.

FYI, 'svn copy' counts as an Add. That may or may not be a concern?
#!/bin/bash
# usage: foo.sh 1234 http://svn_server/repo_name
REV=$1
SVNREPO=$2
svn log -qv -r $REV $SVNREPO
# And we're using perl because I can't be bothered with sed/awk subtleties
svn log -qv --xml -r $REV "$SVNREPO" | perl -ne 'chomp; $a=1 if /^ action="[AD]"/; print "$1\n" if ( $a && /^ kind="file">(.*)<\/path>/ ); $a=0 if /<\/path>/;' | while read i
do
D=./`dirname "$i"`
mkdir -p "$D"
done

The script just drops to the shell with exit code 0. My perl knowledge
is very limited, but to debug I executed this

$ echo "action=\"A\">/trunk/text.txt</path>" | perl -ne 'chomp; $a=1 if
/^ action="[AD]"/; print "$1\n" if ( $a && /^ kind="file">(.*)<\/path>/
); $a=0 if /<\/path>/;'

I assume that is supposed to do something but for me it just drops to
the shell with exit code 0.

[Andrew Reedick]

New and improved and simplified version. Uses 'svn log --diff' to get the files that changed.
Again, only lightly tested. (The previous script assumed that the order of the xml attributes didn't change and it did. Ooops.)
I used perl instead of sed due to sed version silliness in regards to tabs; so feel free to the perl equivalent sed commands to remove the trailing "\t (revision 12345)" from the "svn log --diff ... | grep '^+++' " output.
Remove the two echo commands to actually run the mkdir/export commands.

Edge case: I didn't test how 'svn log --diff' handles deleted files.

#!/bin/bash

REV=$1
SVNREPO=$2

svn log --diff -r $REV "$SVNREPO" | grep '^+++' | perl -pe 's/^\+\+\+ //; s/\t.*$//' | while read i
do
D=./`dirname "$i"`
echo mkdir -p "$D"
echo svn export --force "$SVNREPO/$i@$REV" "$D/"
done




-----Original Message-----
From: ***@gmx.de [mailto:***@gmx.de]
Sent: Wednesday, March 29, 2017 9:28 PM
To: ***@subversion.apache.org
Subject: Re: How to checkout only the changes

Post by Andrew Reedick

Sent: Friday, March 24, 2017 4:04 PM
Subject: How to checkout only the changes
Is there a way to export only the changes, that occured in a specific revision? Like export or checkout only the added or modified files in their respective paths? Deletions and cheap copies cannot be treated that way, obviously. Please CC as I am not subscribed.

FYI, 'svn copy' counts as an Add. That may or may not be a concern?
#!/bin/bash
# usage: foo.sh 1234 http://svn_server/repo_name
REV=$1
SVNREPO=$2
svn log -qv -r $REV $SVNREPO
# And we're using perl because I can't be bothered with sed/awk subtleties
svn log -qv --xml -r $REV "$SVNREPO" | perl -ne 'chomp; $a=1 if /^ action="[AD]"/; print "$1\n" if ( $a && /^ kind="file">(.*)<\/path>/ ); $a=0 if /<\/path>/;' | while read i
do
D=./`dirname "$i"`
mkdir -p "$D"
done

The script just drops to the shell with exit code 0. My perl knowledge is very limited, but to debug I executed this

$ echo "action=\"A\">/trunk/text.txt</path>" | perl -ne 'chomp; $a=1 if /^ action="[AD]"/; print "$1\n" if ( $a && /^ kind="file">(.*)<\/path>/ ); $a=0 if /<\/path>/;'

I assume that is supposed to do something but for me it just drops to the shell with exit

[Daniel Shahaf]

Post by Andrew Reedick
svn log --diff -r $REV "$SVNREPO" | grep '^+++' | perl -pe 's/^\+\+\+ //; s/\t.*$//' | while read i

'svn diff --summarize' or 'svn log -qv' would be better. (They're O(1)
as opposed to O(revision size).)

[Andrew Reedick]

Post by Andrew Reedick
-----Original Message-----
Sent: Thursday, March 30, 2017 3:41 PM
To: Andrew Reedick
Subject: Re: How to checkout only the changes
'vsvn diff --summarize' or 'svn log -qv' would be better. (They're O(1) as opposed to O(revision size).)

Unfortunately, neither one differentiates between directories and filenames (unless you go with --xml.) And exporting a dir will grab a bit more than what we wanted. Unless of course the contents of new directories count as changes. Which would be a

[h***@gmx.de]

Post by Andrew Reedick
-----Original Message-----
Sent: Thursday, March 30, 2017 3:41 PM
To: Andrew Reedick
Subject: Re: How to checkout only the changes
'vsvn diff --summarize' or 'svn log -qv' would be better. (They're O(1) as opposed to O(revision size).)

Unfortunately, neither one differentiates between directories and filenames (unless you go with --xml.) And exporting a dir will grab a bit more than what we wanted. Unless of course the contents of new directories count as changes. Which would be a requirements question for the OP.

I'm not sure if I understand what you guys are talking about.

Done some testing and it seems to do well, thanks. It exports a file
with its path when the file has been added or modified (compared to the
previous revision). I think I can easily wrap this in a loop to go
through all revisions of a repository.

However, it would be even better if it would ignore cheap copies as
these do not not contain that much new information. Maybe I can catch
most of these if I ignore pathnames that contain "tags" or "branches".