tests/test-diff-upgrade.out

patch: support diff data loss detection and upgrade

In worst case, generating diff in upgrade mode can be two times more expensive
than generating it in git mode directly: we may have to regenerate the whole
diff again whenever a git feature is detected. Also, the first diff attempt is
completely buffered instead of being streamed. That said, even without having
profiled it yet, I am convinced we can fast-path the upgrade mode if necessary
were it to be used in regular diff commands, and not only in mq where avoiding
data loss is worth the price.

% make a combination of new, changed and deleted file
adding binary
adding exec
adding regular
adding rmbinary
adding rmempty
adding rmexec
adding rmregular
adding setexec
adding unsetexec
adding newbinary
adding newempty
adding newexec
adding newregular
removing rmbinary
removing rmempty
removing rmexec
removing rmregular
% git=no: regular diff for all files
diff -r b3f053cd7c7f binary
Binary file binary has changed
diff -r b3f053cd7c7f exec
--- a/exec
+++ b/exec
@@ -1,1 +1,2 @@
 exec
+exec
diff -r b3f053cd7c7f newbinary
Binary file newbinary has changed
diff -r b3f053cd7c7f newexec
--- /dev/null
+++ b/newexec
@@ -0,0 +1,1 @@
+newexec
diff -r b3f053cd7c7f newregular
--- /dev/null
+++ b/newregular
@@ -0,0 +1,1 @@
+newregular
diff -r b3f053cd7c7f regular
--- a/regular
+++ b/regular
@@ -1,1 +1,2 @@
 regular
+regular
diff -r b3f053cd7c7f rmbinary
Binary file rmbinary has changed
diff -r b3f053cd7c7f rmexec
--- a/rmexec
+++ /dev/null
@@ -1,1 +0,0 @@
-rmexec
diff -r b3f053cd7c7f rmregular
--- a/rmregular
+++ /dev/null
@@ -1,1 +0,0 @@
-rmregular
% git=no: git diff for single regular file
diff --git a/regular b/regular
--- a/regular
+++ b/regular
@@ -1,1 +1,2 @@
 regular
+regular
% git=auto: regular diff for regular files and removals
diff -r b3f053cd7c7f newregular
--- /dev/null
+++ b/newregular
@@ -0,0 +1,1 @@
+newregular
diff -r b3f053cd7c7f regular
--- a/regular
+++ b/regular
@@ -1,1 +1,2 @@
 regular
+regular
diff -r b3f053cd7c7f rmbinary
Binary file rmbinary has changed
diff -r b3f053cd7c7f rmexec
--- a/rmexec
+++ /dev/null
@@ -1,1 +0,0 @@
-rmexec
diff -r b3f053cd7c7f rmregular
--- a/rmregular
+++ /dev/null
@@ -1,1 +0,0 @@
-rmregular
% git=auto: git diff for exec
diff -r b3f053cd7c7f exec
--- a/exec
+++ b/exec
@@ -1,1 +1,2 @@
 exec
+exec
% git=auto: git diff for newexec
diff --git a/newexec b/newexec
new file mode 100755
--- /dev/null
+++ b/newexec
@@ -0,0 +1,1 @@
+newexec
% git=auto: git diff for setexec
diff --git a/setexec b/setexec
old mode 100644
new mode 100755
% git=auto: git diff for unsetexec
diff --git a/unsetexec b/unsetexec
old mode 100755
new mode 100644
% git=auto: git diff for binary
diff --git a/binary b/binary
index a9128c283485202893f5af379dd9beccb6e79486..09f370e38f498a462e1ca0faa724559b6630c04f
GIT binary patch
literal 2
Jc${Nk0000200961

% git=auto: git diff for newbinary
diff --git a/newbinary b/newbinary
new file mode 100644
index 0000000000000000000000000000000000000000..f76dd238ade08917e6712764a16a22005a50573d
GIT binary patch
literal 1
Ic${MZ000310RR91

% git=auto: git diff for newempty
diff --git a/newempty b/newempty
new file mode 100644
% git=auto: git diff for rmempty
diff --git a/rmempty b/rmempty
deleted file mode 100644
% git=warn: regular diff with data loss warnings
diff -r b3f053cd7c7f binary
Binary file binary has changed
diff -r b3f053cd7c7f exec
--- a/exec
+++ b/exec
@@ -1,1 +1,2 @@
 exec
+exec
diff -r b3f053cd7c7f newbinary
Binary file newbinary has changed
diff -r b3f053cd7c7f newexec
--- /dev/null
+++ b/newexec
@@ -0,0 +1,1 @@
+newexec
diff -r b3f053cd7c7f newregular
--- /dev/null
+++ b/newregular
@@ -0,0 +1,1 @@
+newregular
diff -r b3f053cd7c7f regular
--- a/regular
+++ b/regular
@@ -1,1 +1,2 @@
 regular
+regular
diff -r b3f053cd7c7f rmbinary
Binary file rmbinary has changed
diff -r b3f053cd7c7f rmexec
--- a/rmexec
+++ /dev/null
@@ -1,1 +0,0 @@
-rmexec
diff -r b3f053cd7c7f rmregular
--- a/rmregular
+++ /dev/null
@@ -1,1 +0,0 @@
-rmregular
data lost for: binary
data lost for: newbinary
data lost for: newempty
data lost for: newexec
data lost for: rmempty
data lost for: setexec
data lost for: unsetexec
% git=abort: fail on execute bit change
abort: losing data for setexec
% git=abort: succeed on regular file
diff -r b3f053cd7c7f regular
--- a/regular
+++ b/regular
@@ -1,1 +1,2 @@
 regular
+regular