Re: git fast-export not preserving executable permissions?

From: Torsten Bögershausen <tboegi@web.de>
Date: Apr 30, 2020, 03:42 UTC
Message-ID: <20200430034230.smqu3ai5nx3ewbdq@tb-raspi4>
In-Reply-To: <CAHTRwmjXXYAU_LTBF_9sX1CXFnGyHsu5_KHuCp1rB76-4zn=Gg@mail.gmail.com>

On Wed, Apr 29, 2020 at 09:36:31AM -0400, Doug Glidden wrote:

Show 18 quoted lines

> Hello Git world!
>
> I have run into an issue that I cannot seem to resolve with git
> fast-export. When running a fast-export on a repo that contains
> scripts with executable permissions (e.g. a gradlew script), the
> resulting export does not properly reflect the executable permissions
> on the script files.
>
> To illustrate this issue, I created a small sample repo, with one
> executable file and one non-executable file. From the output below,
> you can see that the mode in the output from fast-export is the same
> for both files; according to the documentation for fast-import, the
> mode for the executable file should be 100755 instead of 100644.
>
>     $ ls -gG
>     total 2
>     -rwxr-xr-x 1 106 Apr 29 09:13 executable_script.sh*
>     -rw-r--r-- 1  63 Apr 29 09:12 non_executable_file.txt

What does git ls-files -s give you here ? We need to know, how Git tracks the files, is it 100644 or 100755 ?

The following works for me:

user@pc:/tmp/fff> git init
Initialized empty Git repository in /private/tmp/fff/.git/
user@pc:/tmp/fff> echo file1 >file1
user@pc:/tmp/fff> git config core.filemode false
user@pc:/tmp/fff> echo file2 >file2
user@pc:/tmp/fff> git add file1 file2
user@pc:/tmp/fff> git ls-files -s
100644 e2129701f1a4d54dc44f03c93bca0a2aec7c5449 0       file1
100644 6c493ff740f9380390d5c9ddef4af18697ac9375 0       file2
user@pc:/tmp/fff> git update-index --chmod=+x file2
user@pc:/tmp/fff> git ls-files -s
100644 e2129701f1a4d54dc44f03c93bca0a2aec7c5449 0       file1
100755 6c493ff740f9380390d5c9ddef4af18697ac9375 0       file2
user@pc:/tmp/fff> git commit -m "Add file1 file2"
[master (root-commit) f75926e] Add file1 file2
 2 files changed, 2 insertions(+)
  create mode 100644 file1
  create mode 100755 file2

user@pc:/tmp/fff> git fast-export --all blob mark :1 data 6 file1

blob mark :2 data 6 file2

reset refs/heads/master commit refs/heads/master mark :3 author Torsten Bögershausen <tboegi@web.de> 1588217922 +0200 committer Torsten Bögershausen <tboegi@web.de> 1588217922 +0200 data 16 Add file1 file2 M 100644 :1 file1 M 100755 :2 file2