CODEWITHSUNDEEP
regexgitfilteringgit-diff
Kamafeather
Kamafeather

Reputation: 9845

git-diff just over hunks matching regexp

Is there any option for git diff that allows to just consider hunks that match some specific criteria (e.g. a regular expression)?

I want diff to just show me hunks that, for example, start with line matching the regex .*<<<special_diff.* and end with a line matching the regex .*\sspecial_diff>>>

I am looking for solutions that would allow to do that, keeping performance fast and staying simple.

Note: it should be able to match multiple lines, so that I could match (into a hunk) a multiline block of text between specific delimiters.

Matching just if a hunk contains a full block (open + close delimiters); for example matching a multiline block delimited by <body> and </body>.

Upvotes: 5

Views: 1137

Answers (1)

phd
phd

Reputation: 94912

Use git diff -Gregexp. Example: the commit 5c6d3a9@mimedecode contains 3 hunks. If I run git diff 5c6d3a9~ 5c6d3a9 I see all 3.

I can filter them using git diff -GReplaced 5c6d3a9~ 5c6d3a9 and I see only 2 of these 3 hunks. With git diff -Greplaced 5c6d3a9~ 5c6d3a9 nothing is shown because by default regexp searching is case-sensitive. To make it case-insensitive add -i: git diff -Greplaced -i 5c6d3a9~ 5c6d3a9; this again produces 2 hunks.

Upvotes: 0

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