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patch: support diff data loss detection and upgrade...
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.
Patrick Mezard - - Load All Authors

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r9827:4fe9ca51 default
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test-diff-ignore-whitespace.out
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Vadim Gelfer
add missed tests for diff -b/-B
 r2594 adding foo
>>> two diffs showing three added lines <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 +
hello world
+
goodbye world
+
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -b
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 +
hello world
+
goodbye world
+
>>> no diffs <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
hg diff -Bb
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 >>> four diffs showing added space first on the first line <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+ hello world
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -b
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+ hello world
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+ hello world
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+ hello world
goodbye world
>>> two diffs showing space appended to the first line <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+hello world
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 -hello world
+hello world
goodbye world
>>> no diffs <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -b
hg diff -Bb
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 >>> four diffs showing space inserted into "goodbye" <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+good bye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+good bye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -b
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+good bye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+good bye world
>>> two diffs showing changed whitespace amount in the last line <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
-goodbye world
+goodbye world
>>> no diffs <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -b
hg diff -Bb
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 >>> four diffs showing added blank line w/horizontal space <<<
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
+
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -B
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hello world
+
goodbye world
hg diff -b
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 hello world
+
goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
>>> three diffs showing added blank line w/other space <<<
hg diff
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+hello world
+
+goodbye world
hg diff -B
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+hello world
+
+goodbye world
hg diff -b
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,3 @@
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 hello world
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 +
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
>>> four diffs showing changed whitespace <<<
hg diff
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+helloworld
+goodbye world
hg diff -B
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+helloworld
+goodbye world
hg diff -b
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
+helloworld
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,2 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
+helloworld
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -w
>>> five diffs showing changed whitespace <<<
hg diff
Vadim Gelfer
add missed tests for diff -b/-B
 r2594 diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+helloworld
+
+
+
+goodbye world
hg diff -B
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
-goodbye world
+helloworld
+
+
+
+goodbye world
hg diff -b
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
+helloworld
+
+
+
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -Bb
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 -hello world
+helloworld
+
+
+
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -w
diff -r 540c40a65b78 foo
--- a/foo
+++ b/foo
Matt Mackall
diff: don't show function name by default...
 r5863 @@ -1,2 +1,5 @@
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 hello world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 +
+
+
Patrick Mezard
mdiff: fix diff -b/B/w on mixed whitespace hunks (issue127)...
 r9827 goodbye world
Matt Mackall
diff: correctly handle combinations of whitespace options
 r4878 hg diff -wB