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How do I diff one branch with my default branch

I switched to a branch on my local repo and noticed it gave me message showing x files updated. This surprised me as I didn't know there were any differences on that branch. How do I compare that branch with the default branch to see what has changed?

3 Answers
3

Use hg diff -r BRANCH1:BRANCH2, where BRANCH1 and BRANCH2 are the names of the branches. This will show you the differences between the heads of the two branches.

hg diff -r BRANCH1:BRANCH2

You got the message about "x files updated" because there were files changed on the original branch, not necessarily because there were files changed on the other branch. Mercurial shows you the union of the sets of changed files from both branches.

hg diff -r default

To just list the files with differences, add the --stat option:

hg diff --stat -r BRANCH1:BRANCH2


This gives output like this:

mypath/file1.cpp | 1 -
mypath/file2.cpp | 143 ++++++++++
mypath/file3.cpp | 18 +-
3 files changed, 160 insertions(+), 2 deletions(-)


Or to clean up the output a bit, pipe it through sed to remove everything after the pipe symbols:

hg diff --stat -r BRANCH1:BRANCH2 | sed "s/|.*$//g"


This gives you just a list of the changed files and the summary line at the end:

mypath/file1.cpp
mypath/file2.cpp
mypath/file3.cpp
3 files changed, 160 insertions(+), 2 deletions(-)


To view a diff of branch otherbranch with the current branch:

otherbranch

hg diff -r otherbranch


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