1 files changed, 34 insertions, 0 deletions
diff --git a/ftplugin/gitcommit/gitcha.vim b/ftplugin/gitcommit/gitcha.vim
new file mode 100644
index 0000000..e08f2e0
--- /dev/null
+++ b/ftplugin/gitcommit/gitcha.vim
@@ -0,0 +1,34 @@
+let s:old_completefunc = &completefunc
+
+function! GitSHAComplete(findstart, base)
+	if a:findstart
+		" locate the start of the word
+		let line = getline('.')
+		let start = col('.') - 1
+		while start > 0 && line[start - 1] =~ '\a'
+			let start -= 1
+		endwhile
+		return start
+	endif
+
+	" Restore user completion function
+	let &completefunc = s:old_completefunc
+
+	" Match Git SHAs in the current repository
+	let matches = []
+	let revs = system('git rev-list --all')
+	for m in split(revs)
+		if m =~ '^' . a:base
+			call add(matches, m)
+		endif
+	endfor
+
+	return matches
+endfunction
+
+function! StartGitSHACompletion()
+	set completefunc=GitSHAComplete
+	return "\<C-x>\<C-u>"
+endfunction
+
+inoremap <expr> <C-x><C-s> StartGitSHACompletion()