Blaming diffs

Hi,

It seems to me there is no tool to "blame diffs", i.e. something to know what commit(s) is(are) responsible for a set of changes.

For example, the following script tries to get the set of commits involved in the changes between $A and $B. Note it only works for text additions.

git diff --unified=0 $A $B | awk 'BEGIN { FS="(^(--- a/|+++ b/)|^@@ -[0-9,]+ \\+| @@)" } /^---/ || ( /^+++ b\/(.*)/ && file=="" ) { file = $2 } /^@@/ {split($2, a, /,/); a[2] = a[2] ? a[2] + a[1] - 1 : a[1]; print "git blame -l -L " a[1] "," a[2], "'$A..$B'", file }' | sh | cut -f 1 -d " " | sort -u

Has anyone tried to work on something similar yet ?

If not, as git users, what kind of output would you expect from such a tool, and where do you think this should lie (extension to git diff, or separate tool) ?

Cheers,

Mike