(copying in Konstantin)
----- Original Message -----
From: vvs
To: Git for human beings
Cc: vvs...@gmail.com ; philipoak...@iee.org
Sent: Saturday, April 22, 2017 3:18 PM
Subject: Re: [git-users] Undocumented reset behavior
On Saturday, April 22, 2017 at 4:50:41 PM UTC+3, Philip Oakley wrote:
If i understood the initial statement your have two different seqences of
commands and their interaction isn't as expected. but I couldn't decide what
the specific sequence were.
Would you ab able to show a short test case, even just use a comment to
indcate initial state, and then the different commands and what you see as
different.
Yes, you are right. Here is a simple test case:
mkdir test
cd test
git init
touch xxx
git add xxx
git commit -m xxx
touch yyy
git add yyy
git commit -m yyy
git reset HEAD^
git reset @{1}
git reset --hard
This is different because yyy will be touched:
git reset HEAD^
git reset --hard @{1}
I believe these two cases should be no different at all. Anyway, that's
what the docs say, at least as I understand it.
--
I tried it locally but didn't get what I think you expected. I am on git
version 2.9.0.windows.1.323.g0305acf (~the last which supports my harware).
What I have / see is
[first, I slightly beef up the test case and the investigation/status commands
second, I run the two sets, but don't see the time stamp issue,
which is commonly the issue with make files vs git
(one thinks time stamps are important the other doesn't)
:-
mkdir test
cd test
git init
touch xxx
git add xxx
git commit -m xxx
touch yyy
git add yyy
git commit -m yyy
git status
sleep 2
git reset HEAD^
# move the branch back one commit implies --mixed.
# Resets the index but not the working tree
# (i.e., the changed files are preserved but not marked for commit)
git status
git reflog
stat yyy
# Option A
git reset @{1}
# Resets the index to yyy but no change to the working tree
stat yyy
git reset --hard
# Resets the index and working tree. but the yyy file is already up to date.
stat yyy
# Option B
git reset --hard @{1}
# Resets the index and working tree.
# Any changes to tracked files in the working tree since <commit> are discarded.
# brand new yyy file (in the commit) - overwrite whatever was there.
stat yyy
# Noticed difference (by vvs009) is: 'make' detetcting a timestamp difference
(in yyy?) that was not expected. ?
==
A.
Philip@PhilipOakley MINGW32 /usr/src
$ cd test
Philip@PhilipOakley MINGW32 /usr/src/test
$ git init
Initialized empty Git repository in C:/git-sdk-32/usr/src/test/.git/
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ touch xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git add xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git commit -m xxx
[master (root-commit) 83a861e] xxx
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ touch yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git add yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git commit -m yyy
[master 0db613e] yyy
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git status
On branch master
nothing to commit, working tree clean
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ sleep 2
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reset HEAD^
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # move the branch back one commit implies --mixed.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Resets the index but not the working tree
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # (i.e., the changed files are preserved but not marked for commit)
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git status
On branch master
Untracked files:
(use "git add <file>..." to include in what will be committed)
yyy
nothing added to commit but untracked files present (use "git add" to track)
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reflog
83a861e HEAD@{0}: reset: moving to HEAD^
0db613e HEAD@{1}: commit: yyy
83a861e HEAD@{2}: commit (initial): xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ stat yyy
File: 'yyy'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 94555d4eh/2488622414d Inode: 63331869760117686 Links: 1
Access: (0644/-rw-r--r--) Uid: (197613/ Philip) Gid: (197121/ UNKNOWN)
Access: 2017-04-22 16:43:47.562500000 +0100
Modify: 2017-04-22 16:43:47.562500000 +0100
Change: 2017-04-22 16:43:47.562500000 +0100
Birth: 2017-04-22 16:43:47.562500000 +0100
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Option A
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reset @{1}
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Resets the index to xxx but no change to the working tree
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ stat yyy
File: 'yyy'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 94555d4eh/2488622414d Inode: 63331869760117686 Links: 1
Access: (0644/-rw-r--r--) Uid: (197613/ Philip) Gid: (197121/ UNKNOWN)
Access: 2017-04-22 16:43:47.562500000 +0100
Modify: 2017-04-22 16:43:47.562500000 +0100
Change: 2017-04-22 16:43:47.562500000 +0100
Birth: 2017-04-22 16:43:47.562500000 +0100
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reset --hard
HEAD is now at 0db613e yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Resets the index and working tree. but the yyy file is already up to date.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ stat yyy
File: 'yyy'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 94555d4eh/2488622414d Inode: 63331869760117686 Links: 1
Access: (0644/-rw-r--r--) Uid: (197613/ Philip) Gid: (197121/ UNKNOWN)
Access: 2017-04-22 16:43:47.562500000 +0100
Modify: 2017-04-22 16:43:47.562500000 +0100
Change: 2017-04-22 16:43:47.562500000 +0100
Birth: 2017-04-22 16:43:47.562500000 +0100
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
====
B.
Philip@PhilipOakley MINGW32 /usr/src
$ cd test
Philip@PhilipOakley MINGW32 /usr/src/test
$ git init
Initialized empty Git repository in C:/git-sdk-32/usr/src/test/.git/
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ touch xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git add xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git commit -m xxx
[master (root-commit) 00e124e] xxx
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ touch yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git add yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git commit -m yyy
[master fe84b18] yyy
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git status
On branch master
nothing to commit, working tree clean
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ sleep 2
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reset HEAD^
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # move the branch back one commit implies --mixed.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Resets the index but not the working tree
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # (i.e., the changed files are preserved but not marked for commit)
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git status
On branch master
Untracked files:
(use "git add <file>..." to include in what will be committed)
yyy
nothing added to commit but untracked files present (use "git add" to track)
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reflog
00e124e HEAD@{0}: reset: moving to HEAD^
fe84b18 HEAD@{1}: commit: yyy
00e124e HEAD@{2}: commit (initial): xxx
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ stat yyy
File: 'yyy'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 94555d4eh/2488622414d Inode: 17451448556419482 Links: 1
Access: (0644/-rw-r--r--) Uid: (197613/ Philip) Gid: (197121/ UNKNOWN)
Access: 2017-04-22 16:47:19.437500000 +0100
Modify: 2017-04-22 16:47:19.437500000 +0100
Change: 2017-04-22 16:47:19.437500000 +0100
Birth: 2017-04-22 16:47:19.437500000 +0100
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Option B
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ git reset --hard @{1}
HEAD is now at fe84b18 yyy
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Resets the index and working tree.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Any changes to tracked files in the working tree since <commit> are
discarded.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # brand new yyy file (in the commit) - overwrite whatever was there.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ stat yyy
File: 'yyy'
Size: 0 Blocks: 0 IO Block: 65536 regular empty file
Device: 94555d4eh/2488622414d Inode: 17732923533130138 Links: 1
Access: (0644/-rw-r--r--) Uid: (197613/ Philip) Gid: (197121/ UNKNOWN)
Access: 2017-04-22 16:47:29.640625000 +0100
Modify: 2017-04-22 16:47:29.640625000 +0100
Change: 2017-04-22 16:47:29.640625000 +0100
Birth: 2017-04-22 16:47:19.437500000 +0100
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$ # Noticed difference is: 'make' detetcting a timestamp difference (in yyy?)
that was not expected.
Philip@PhilipOakley MINGW32 /usr/src/test (master)
$
===
So in both these cases, the test simplification appears to result in identical
output (unless I missed something - could easily happen)
--
Philip
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