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From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: <git@vger.kernel.org>
Cc: "Martin Ågren" <martin.agren@gmail.com>
Subject: [PATCH v2 3/3] docs: explain how to deal with files that are always modified
Date: Sun, 20 Sep 2020 23:22:31 +0000
Message-ID: <20200920232231.1300394-4-sandals@crustytoothpaste.net> (raw)
In-Reply-To: <20200920232231.1300394-1-sandals@crustytoothpaste.net>

Users frequently have problems where two filenames differ only in case,
causing one of those files to show up consistently as being modified.
Let's add a FAQ entry that explains how to deal with that.

In addition, let's explain another common case where files are
consistently modified, which is when files using a smudge or clean
filter have not been run through that filter.  Explain the way to fix
this as well.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 Documentation/gitfaq.txt | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/Documentation/gitfaq.txt b/Documentation/gitfaq.txt
index 176b097cf7..afdaeab850 100644
--- a/Documentation/gitfaq.txt
+++ b/Documentation/gitfaq.txt
@@ -363,6 +363,39 @@ information about how to configure files as text or binary.
 You can also control this behavior with the `core.whitespace` setting if you
 don't wish to remove the carriage returns from your line endings.
 
+[[always-modified-files-case]]
+Why do I have a file that's always modified?::
+	Internally, Git always stores file names as sequences of bytes and doesn't
+	perform any encoding or case folding.  However, Windows and macOS by default
+	both perform case folding on file names.  As a result, it's possible to end up
+	with multiple files or directories whose names differ only in case.  Git can
+	handle this just fine, but the file system can store only one of these files,
+	so when Git reads the other file to see its contents, it looks modified.
++
+It's best to remove one of the files such that you only have one file.  You can
+do this with commands like the following (assuming two files `AFile.txt` and
+`afile.txt`) on an otherwise clean working tree:
++
+----
+$ git rm --cached AFile.txt
+$ git commit -m 'Remove files conflicting in case'
+$ git checkout .
+----
++
+This avoids touching the disk, but removes the additional file.  Your project
+may prefer to adopt a naming convention, such as all-lowercase names, to avoid
+this problem from occurring again; such a convention can be checked using a
+`pre-receive` hook or as part of a continuous integration (CI) system.
++
+It is also possible for perpetually modified files to occur on any platform if a
+smudge or clean filter is in use on your system but a file was previously
+committed without running the smudge or clean filter.  To fix this, run the
+following on an otherwise clean working tree:
++
+----
+$ git add --renormalize .
+----
+
 [[recommended-storage-settings]]
 What's the recommended way to store files in Git?::
 	While Git can store and handle any file of any type, there are some

      parent reply	other threads:[~2020-09-20 23:23 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-12 20:48 [PATCH 0/3] FAQ entries for merges and modified files brian m. carlson
2020-09-12 20:48 ` [PATCH 1/3] docs: explain why squash merges are broken with long-running branches brian m. carlson
2020-09-13 15:05   ` Martin Ågren
2020-09-13 17:12     ` brian m. carlson
2020-09-12 20:48 ` [PATCH 2/3] docs: explain why reverts are not always applied on merge brian m. carlson
2020-09-13 15:12   ` Martin Ågren
2020-09-12 20:48 ` [PATCH 3/3] docs: explain how to deal with files that are always modified brian m. carlson
2020-09-13 15:13   ` Martin Ågren
2020-09-12 21:48 ` [PATCH 0/3] FAQ entries for merges and modified files Junio C Hamano
2020-09-20 23:22 ` [PATCH v2 " brian m. carlson
2020-09-20 23:22   ` [PATCH v2 1/3] docs: explain why squash merges are broken with long-running branches brian m. carlson
2020-09-20 23:22   ` [PATCH v2 2/3] docs: explain why reverts are not always applied on merge brian m. carlson
2020-09-20 23:22   ` brian m. carlson [this message]

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