Test that rename detection works
  $ . "$TESTDIR/testutil"

  $ cat >> $HGRCPATH <<EOF
  > [diff]
  > git = True
  > [git]
  > similarity = 50
  > EOF

  $ git init -q gitrepo
  $ cd gitrepo
  $ for i in 1 2 3 4 5 6 7 8 9 10; do echo $i >> alpha; done
  $ git add alpha
  $ fn_git_commit -malpha

Rename a file
  $ git mv alpha beta
  $ echo 11 >> beta
  $ git add beta
  $ fn_git_commit -mbeta

Copy a file
  $ cp beta gamma
  $ echo 12 >> beta
  $ echo 13 >> gamma
  $ git add beta gamma
  $ fn_git_commit -mgamma

Add a submodule (gitlink) and move it to a different spot:
  $ cd ..
  $ git init -q gitsubmodule
  $ cd gitsubmodule
  $ touch subalpha
  $ git add subalpha
  $ fn_git_commit -msubalpha
  $ cd ../gitrepo

  $ rmpwd="import sys; print sys.stdin.read().replace('$(dirname $(pwd))/', '')"
  $ clonefilt='s/Cloning into/Initialized empty Git repository in/;s/in .*/in .../'

  $ git submodule add ../gitsubmodule 2>&1 | python -c "$rmpwd" | sed "$clonefilt" | egrep -v '^done\.$'
  Initialized empty Git repository in ...
  
  $ fn_git_commit -m 'add submodule'
  $ sed -e 's/path = gitsubmodule/path = gitsubmodule2/' .gitmodules > .gitmodules-new
  $ mv .gitmodules-new .gitmodules
  $ mv gitsubmodule gitsubmodule2
  $ git add .gitmodules gitsubmodule2
  $ git rm --cached gitsubmodule
  rm 'gitsubmodule'
  $ fn_git_commit -m 'move submodule'

Rename a file elsewhere and replace it with a symlink:

  $ git mv beta beta-new
  $ ln -s beta-new beta
  $ git add beta
  $ fn_git_commit -m 'beta renamed'

Rename the file back:

  $ git rm beta
  rm 'beta'
  $ git mv beta-new beta
  $ fn_git_commit -m 'beta renamed back'

Rename a file elsewhere and replace it with a submodule:

  $ git mv gamma gamma-new
  $ git submodule add ../gitsubmodule gamma 2>&1 | python -c "$rmpwd" | sed "$clonefilt" | egrep -v '^done\.$'
  Initialized empty Git repository in ...
  
  $ fn_git_commit -m 'rename and add submodule'

Remove the submodule and rename the file back:

  $ grep 'submodule "gitsubmodule"' -A2 .gitmodules > .gitmodules-new
  $ mv .gitmodules-new .gitmodules
  $ git add .gitmodules
  $ git rm --cached gamma
  rm 'gamma'
  $ rm -rf gamma
  $ git mv gamma-new gamma
  $ fn_git_commit -m 'remove submodule and rename back'

  $ git checkout -f -b not-master 2>&1 | sed s/\'/\"/g
  Switched to a new branch "not-master"

  $ cd ..
  $ hg clone -q gitrepo hgrepo
  $ cd hgrepo
  $ hg log -p --graph --template "{rev} {node} {desc|firstline}\n{join(extras, ' ')}\n\n"
  @  8 a26f94023ab2ea40c9e4c4dbb753c9a4e572fefe remove submodule and rename back
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/.gitmodules b/.gitmodules
  |  --- a/.gitmodules
  |  +++ b/.gitmodules
  |  @@ -1,6 +1,3 @@
  |   [submodule "gitsubmodule"]
  |   	path = gitsubmodule2
  |   	url = ../gitsubmodule
  |  -[submodule "gamma"]
  |  -	path = gamma
  |  -	url = ../gitsubmodule
  |  diff --git a/.hgsub b/.hgsub
  |  --- a/.hgsub
  |  +++ b/.hgsub
  |  @@ -1,2 +1,1 @@
  |   gitsubmodule2 = [git]../gitsubmodule
  |  -gamma = [git]../gitsubmodule
  |  diff --git a/.hgsubstate b/.hgsubstate
  |  --- a/.hgsubstate
  |  +++ b/.hgsubstate
  |  @@ -1,2 +1,1 @@
  |  -5944b31ff85b415573d1a43eb942e2dea30ab8be gamma
  |   5944b31ff85b415573d1a43eb942e2dea30ab8be gitsubmodule2
  |  diff --git a/gamma-new b/gamma
  |  rename from gamma-new
  |  rename to gamma
  |
  o  7 a7c65d466ee1f33540695666c2e65dcbe3fbe388 rename and add submodule
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/.gitmodules b/.gitmodules
  |  --- a/.gitmodules
  |  +++ b/.gitmodules
  |  @@ -1,3 +1,6 @@
  |   [submodule "gitsubmodule"]
  |   	path = gitsubmodule2
  |   	url = ../gitsubmodule
  |  +[submodule "gamma"]
  |  +	path = gamma
  |  +	url = ../gitsubmodule
  |  diff --git a/.hgsub b/.hgsub
  |  --- a/.hgsub
  |  +++ b/.hgsub
  |  @@ -1,1 +1,2 @@
  |   gitsubmodule2 = [git]../gitsubmodule
  |  +gamma = [git]../gitsubmodule
  |  diff --git a/.hgsubstate b/.hgsubstate
  |  --- a/.hgsubstate
  |  +++ b/.hgsubstate
  |  @@ -1,1 +1,2 @@
  |  +5944b31ff85b415573d1a43eb942e2dea30ab8be gamma
  |   5944b31ff85b415573d1a43eb942e2dea30ab8be gitsubmodule2
  |  diff --git a/gamma b/gamma-new
  |  rename from gamma
  |  rename to gamma-new
  |
  o  6 10614bb16f4d240ba81b6a71d76a7aa160621a29 beta renamed back
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/beta b/beta
  |  old mode 120000
  |  new mode 100644
  |  --- a/beta
  |  +++ b/beta
  |  @@ -1,1 +1,12 @@
  |  -beta-new
  |  \ No newline at end of file
  |  +1
  |  +2
  |  +3
  |  +4
  |  +5
  |  +6
  |  +7
  |  +8
  |  +9
  |  +10
  |  +11
  |  +12
  |  diff --git a/beta-new b/beta-new
  |  deleted file mode 100644
  |  --- a/beta-new
  |  +++ /dev/null
  |  @@ -1,12 +0,0 @@
  |  -1
  |  -2
  |  -3
  |  -4
  |  -5
  |  -6
  |  -7
  |  -8
  |  -9
  |  -10
  |  -11
  |  -12
  |
  o  5 96ad24db491a180ccd330556129d75377e201f63 beta renamed
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/beta b/beta
  |  old mode 100644
  |  new mode 120000
  |  --- a/beta
  |  +++ b/beta
  |  @@ -1,12 +1,1 @@
  |  -1
  |  -2
  |  -3
  |  -4
  |  -5
  |  -6
  |  -7
  |  -8
  |  -9
  |  -10
  |  -11
  |  -12
  |  +beta-new
  |  \ No newline at end of file
  |  diff --git a/beta b/beta-new
  |  copy from beta
  |  copy to beta-new
  |
  o  4 d22608e850ea875936802e119831f1789f5d98bd move submodule
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/.gitmodules b/.gitmodules
  |  --- a/.gitmodules
  |  +++ b/.gitmodules
  |  @@ -1,3 +1,3 @@
  |   [submodule "gitsubmodule"]
  |  -	path = gitsubmodule
  |  +	path = gitsubmodule2
  |   	url = ../gitsubmodule
  |  diff --git a/.hgsub b/.hgsub
  |  --- a/.hgsub
  |  +++ b/.hgsub
  |  @@ -1,1 +1,1 @@
  |  -gitsubmodule = [git]../gitsubmodule
  |  +gitsubmodule2 = [git]../gitsubmodule
  |  diff --git a/.hgsubstate b/.hgsubstate
  |  --- a/.hgsubstate
  |  +++ b/.hgsubstate
  |  @@ -1,1 +1,1 @@
  |  -5944b31ff85b415573d1a43eb942e2dea30ab8be gitsubmodule
  |  +5944b31ff85b415573d1a43eb942e2dea30ab8be gitsubmodule2
  |
  o  3 db55fd0e7083555ec886f6175fa0a42a711c6592 add submodule
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/.gitmodules b/.gitmodules
  |  new file mode 100644
  |  --- /dev/null
  |  +++ b/.gitmodules
  |  @@ -0,0 +1,3 @@
  |  +[submodule "gitsubmodule"]
  |  +	path = gitsubmodule
  |  +	url = ../gitsubmodule
  |  diff --git a/.hgsub b/.hgsub
  |  new file mode 100644
  |  --- /dev/null
  |  +++ b/.hgsub
  |  @@ -0,0 +1,1 @@
  |  +gitsubmodule = [git]../gitsubmodule
  |  diff --git a/.hgsubstate b/.hgsubstate
  |  new file mode 100644
  |  --- /dev/null
  |  +++ b/.hgsubstate
  |  @@ -0,0 +1,1 @@
  |  +5944b31ff85b415573d1a43eb942e2dea30ab8be gitsubmodule
  |
  o  2 20f9e56b6d006d0403f853245e483d0892b8ac48 gamma
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/beta b/beta
  |  --- a/beta
  |  +++ b/beta
  |  @@ -9,3 +9,4 @@
  |   9
  |   10
  |   11
  |  +12
  |  diff --git a/beta b/gamma
  |  copy from beta
  |  copy to gamma
  |  --- a/beta
  |  +++ b/gamma
  |  @@ -9,3 +9,4 @@
  |   9
  |   10
  |   11
  |  +13
  |
  o  1 9f7744e68def81da3b394f11352f602ca9c8ab68 beta
  |  branch=default hg-git-rename-source=git
  |
  |  diff --git a/alpha b/beta
  |  rename from alpha
  |  rename to beta
  |  --- a/alpha
  |  +++ b/beta
  |  @@ -8,3 +8,4 @@
  |   8
  |   9
  |   10
  |  +11
  |
  o  0 7bc844166f76e49562f81eacd54ea954d01a9e42 alpha
     branch=default hg-git-rename-source=git
  
     diff --git a/alpha b/alpha
     new file mode 100644
     --- /dev/null
     +++ b/alpha
     @@ -0,0 +1,10 @@
     +1
     +2
     +3
     +4
     +5
     +6
     +7
     +8
     +9
     +10
  

Make a new ordinary commit in Mercurial (no extra metadata)
  $ echo 14 >> gamma
  $ hg ci -m "gamma2"

Make a new commit with a copy and a rename in Mercurial
  $ hg cp gamma delta
  $ echo 15 >> delta
  $ hg mv beta epsilon
  $ echo 16 >> epsilon
  $ hg ci -m "delta/epsilon"
  $ hg export .
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID a725f9bdefe29f1a1db89ad030d9f1ee36b3a440
  # Parent  814ed6aa5bd2867ce5ab80f3c2602155d89027b1
  delta/epsilon
  
  diff --git a/gamma b/delta
  copy from gamma
  copy to delta
  --- a/gamma
  +++ b/delta
  @@ -11,3 +11,4 @@
   11
   13
   14
  +15
  diff --git a/beta b/epsilon
  rename from beta
  rename to epsilon
  --- a/beta
  +++ b/epsilon
  @@ -10,3 +10,4 @@
   10
   11
   12
  +16
  $ hg push
  pushing to $TESTTMP/gitrepo
  searching for changes
  adding objects
  added 2 commits with 2 trees and 3 blobs
  updating reference refs/heads/master

  $ cd ../gitrepo
  $ git log master --pretty=oneline
  5f2948d029693346043f320620af99a615930dc4 delta/epsilon
  bbd2ec050f7fbc64f772009844f7d58a556ec036 gamma2
  50d116676a308b7c22935137d944e725d2296f2a remove submodule and rename back
  59fb8e82ea18f79eab99196f588e8948089c134f rename and add submodule
  f95497455dfa891b4cd9b524007eb9514c3ab654 beta renamed back
  055f482277da6cd3dd37c7093d06983bad68f782 beta renamed
  d7f31298f27df8a9226eddb1e4feb96922c46fa5 move submodule
  c610256cb6959852d9e70d01902a06726317affc add submodule
  e1348449e0c3a417b086ed60fc13f068d4aa8b26 gamma
  cc83241f39927232f690d370894960b0d1943a0e beta
  938bb65bb322eb4a3558bec4cdc8a680c4d1794c alpha

Make sure the right metadata is stored
  $ git cat-file commit master^
  tree 0adbde18545845f3b42ad1a18939ed60a9dec7a8
  parent 50d116676a308b7c22935137d944e725d2296f2a
  author test <none@none> 0 +0000
  committer test <none@none> 0 +0000
  HG:rename-source hg
  
  gamma2
  $ git cat-file commit master
  tree f8f32f4e20b56a5a74582c6a5952c175bf9ec155
  parent bbd2ec050f7fbc64f772009844f7d58a556ec036
  author test <none@none> 0 +0000
  committer test <none@none> 0 +0000
  HG:rename gamma:delta
  HG:rename beta:epsilon
  
  delta/epsilon

Now make another clone and compare the hashes

  $ cd ..
  $ hg clone -q gitrepo hgrepo2
  $ cd hgrepo2
  $ hg export master
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID a725f9bdefe29f1a1db89ad030d9f1ee36b3a440
  # Parent  814ed6aa5bd2867ce5ab80f3c2602155d89027b1
  delta/epsilon
  
  diff --git a/gamma b/delta
  copy from gamma
  copy to delta
  --- a/gamma
  +++ b/delta
  @@ -11,3 +11,4 @@
   11
   13
   14
  +15
  diff --git a/beta b/epsilon
  rename from beta
  rename to epsilon
  --- a/beta
  +++ b/epsilon
  @@ -10,3 +10,4 @@
   10
   11
   12
  +16

Regenerate the Git metadata and compare the hashes
  $ hg gclear
  clearing out the git cache data
  $ hg gexport
  $ cd .hg/git
  $ git log master --pretty=oneline
  5f2948d029693346043f320620af99a615930dc4 delta/epsilon
  bbd2ec050f7fbc64f772009844f7d58a556ec036 gamma2
  50d116676a308b7c22935137d944e725d2296f2a remove submodule and rename back
  59fb8e82ea18f79eab99196f588e8948089c134f rename and add submodule
  f95497455dfa891b4cd9b524007eb9514c3ab654 beta renamed back
  055f482277da6cd3dd37c7093d06983bad68f782 beta renamed
  d7f31298f27df8a9226eddb1e4feb96922c46fa5 move submodule
  c610256cb6959852d9e70d01902a06726317affc add submodule
  e1348449e0c3a417b086ed60fc13f068d4aa8b26 gamma
  cc83241f39927232f690d370894960b0d1943a0e beta
  938bb65bb322eb4a3558bec4cdc8a680c4d1794c alpha