diff-frag
v1.1.1
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Take a big diff with a 2-line header and turn it into frags with only a reasonable amount of context
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diff-frag
Take a big diff with or without a 2-line header and turn it into frags with only a reasonable amount of context
For example, you might have a program that spits out a diff like this:
some header data
Author: Bobo The Cat <[email protected]>
Date: Wed Nov 20 20:13:08 2019 -0800
diff --git a/bowl.txt b/bowl.txt
index glorp..prolg 100655
--- a/bowl.txt
+++ b/bowl.txt
space-prefixed lines are the same in both
but we were sloppy in what got included in the diff
this can happen if you tell git to output a LOT of context, or if you
have a program that diffs objects in a naive way.
so you get 1000 lines of identical output ...
but dumping that all to ta teerminal is so ruuuuuude
-what you want
+what you want is just this bit
+ just the changes
more more more more more.... it goes on and on for a long time...
In that case, what you'd really prefer is something like:
some header data
Author: Bobo The Cat <[email protected]>
Date: Wed Nov 20 20:13:08 2019 -0800
diff --git a/bowl.txt b/bowl.txt
index glorp..prolg 100655
--- a/bowl.txt
+++ b/bowl.txt
@@ -1000,6 +1000,7 @@ so you get 1000 lines of identical...
but dumping that all to ta teerminal is so ruuuuuude
-what you want
+what you want is just this bit
+just the changes
more more more more more.... it goes on and on for a long time...
@@ -2456,5 +2567,5 @@ another bit of context here
+ added line
+ well, you get
- removed line
- the idea
just the changes, is what I'm saying, not the 1000 lines between.
This function will take the first kind of string, and turn it into the second. It's useful for test frameworks that pretty-print object diffs, for object matching assertions, and want to make them prettier when the object is really big.
USAGE
const diffFrag = require('diff-frag')
// options are optional, you don't have to pass that in
const fraggedDiff = diffFrag(rawDiff, options)
// that's it, it's just the one function
OPTIONS
contextLines
How many lines of context to show? Default = 3hasHeader
Set totrue
to indicate that there is a header separated by--- oldName\n+++ newName\n
lines. Set tofalse
to indicate that you're definitely only sending just the+/-/' '
-prefixed diff parts. Leave it as the defaultnull
to tell diffFrag to try to figure it out.oldName
Only relevant if the header can't be found, otherwise it'll use the oldName in the header that the diff already has.oldHeader
Only relevant if the header can't be found, otherwise it'll use the oldHeader in the header that the diff already has.newName
Only relevant if the header can't be found, otherwise it'll use the newName in the header that the diff already has.newHeader
Only relevant if the header can't be found, otherwise it'll use the newHeader in the header that the diff already has.
A ---/+++
header is always attached to the diff it returns. If a header
is found in the diff you provide, then it'll use the names it finds,
otherwise it's generated as:
`---${oldName}\t${oldHeader}\n+++${newName}\t${newHeader}`