1 files changed, 59 insertions, 0 deletions
diff --git a/syntax/gosum.vim b/syntax/gosum.vim
new file mode 100644
index 00000000..07130ca2
--- /dev/null
+++ b/syntax/gosum.vim
@@ -0,0 +1,59 @@
+if has_key(g:polyglot_is_disabled, 'go')
+  finish
+endif
+
+" gosum.vim: Vim syntax file for go.sum file
+"
+" Quit when a (custom) syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+syntax case match
+
+" highlight versions:
+"  * vX.Y.Z-pre
+"  * vX.Y.Z
+"  * vX.0.0-yyyyymmddhhmmss-abcdefabcdef
+"  * vX.Y.Z-pre.0.yyyymmddhhmmss-abcdefabcdef
+"  * vX.Y.(Z+1)-0.yyyymmddhhss-abcdefabcdef
+"  see https://godoc.org/golang.org/x/tools/internal/semver for more
+"  information about how semantic versions are parsed and
+"  https://golang.org/cmd/go/ for how pseudo-versions and +incompatible
+"  are applied.
+
+
+" match vX.Y.Z and their prereleases
+syntax match gomodVersion "v\d\+\.\d\+\.\d\+\%(-\%([0-9A-Za-z-]\+\)\%(\.[0-9A-Za-z-]\+\)*\)\?\%(+\%([0-9A-Za-z-]\+\)\(\.[0-9A-Za-z-]\+\)*\)\?"
+"                          ^--- version ---^^------------ pre-release  ---------------------^^--------------- metadata ---------------------^
+"   	                     ^--------------------------------------- semantic version -------------------------------------------------------^
+
+" match pseudo versions
+" without a major version before the commit (e.g.  vX.0.0-yyyymmddhhmmss-abcdefabcdef)
+syntax match gomodVersion  "v\d\+\.0\.0-\d\{14\}-\x\+"
+" when most recent version before target is a pre-release
+syntax match gomodVersion  "v\d\+\.\d\+\.\d\+-\%([0-9A-Za-z-]\+\)\%(\.[0-9A-Za-z-]\+\)*\%(+\%([0-9A-Za-z-]\+\)\(\.[0-9A-Za-z-]\+\)*\)\?\.0\.\d\{14}-\x\+"
+"                          ^--- version ---^^--- ------ pre-release -----------------^^--------------- metadata ---------------------^
+"                     	   ^------------------------------------- semantic version --------------------------------------------------^
+" most recent version before the target is X.Y.Z
+syntax match gomodVersion "v\d\+\.\d\+\.\d\+\%(+\%([0-9A-Za-z-]\+\)\(\.[0-9A-Za-z-]\+\)*\)\?-0\.\d\{14}-\x\+"
+"                          ^--- version ---^^--------------- metadata ---------------------^
+
+" match incompatible vX.Y.Z and their prereleases
+syntax match gomodVersion "v[2-9]\{1}\d*\.\d\+\.\d\+\%(-\%([0-9A-Za-z-]\+\)\%(\.[0-9A-Za-z-]\+\)*\)\?\%(+\%([0-9A-Za-z-]\+\)\(\.[0-9A-Za-z-]\+\)*\)\?+incompatible"
+"                          ^------- version -------^^------------- pre-release ---------------------^^--------------- metadata ---------------------^
+"               	         ^------------------------------------------- semantic version -----------------------------------------------------------^
+
+" match incompatible pseudo versions
+" incompatible without a major version before the commit (e.g.  vX.0.0-yyyymmddhhmmss-abcdefabcdef)
+syntax match gomodVersion "v[2-9]\{1}\d*\.0\.0-\d\{14\}-\x\++incompatible"
+" when most recent version before target is a pre-release
+syntax match gomodVersion "v[2-9]\{1}\d*\.\d\+\.\d\+-\%([0-9A-Za-z-]\+\)\%(\.[0-9A-Za-z-]\+\)*\%(+\%([0-9A-Za-z-]\+\)\(\.[0-9A-Za-z-]\+\)*\)\?\.0\.\d\{14}-\x\++incompatible"
+"                          ^------- version -------^^---------- pre-release -----------------^^--------------- metadata ---------------------^
+"                     	   ^---------------------------------------- semantic version ------------------------------------------------------^
+" most recent version before the target is X.Y.Z
+syntax match gomodVersion "v[2-9]\{1}\d*\.\d\+\.\d\+\%(+\%([0-9A-Za-z-]\+\)\%(\.[0-9A-Za-z-]\+\)*\)\?-0\.\d\{14}-\x\++incompatible"
+"                          ^------- version -------^^---------------- metadata ---------------------^
+highlight default link gomodVersion Identifier
+
+let b:current_syntax = "gomod"