autoload/gitcha.vim: Add commit subject to completion popup (WIP)

Initial try at adding the commit subject to the popup menu to provide
context for the commit.

Currently only shows the first word of the subject because I'm using
`split()`.

1 files changed, 27 insertions, 3 deletions

diff --git a/autoload/gitcha.vim b/autoload/gitcha.vim
index bde75a2..d84cf15 100644
--- a/autoload/gitcha.vim
+++ b/autoload/gitcha.vim
@@ -19,9 +19,10 @@ function! gitcha#GitSHAComplete(findstart, base)
 
 	" 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
+	let revs = system('git rev-list --all --pretty=oneline --no-abbrev-commit')
+
+	for m in s:BuildMatchDictionary(revs)
+		if m['word'] =~ '^' . a:base
 			call add(matches, m)
 		endif
 	endfor
@@ -29,6 +30,29 @@ function! gitcha#GitSHAComplete(findstart, base)
 	return matches
 endfunction
 
+" Takes rev-list output from:
+"   $ git rev-list --all --pretty=oneline --no-abbrev-commit
+"
+" Creates a dictionary to be used for matching that uses commit SHAs for the
+" completion word and the commit subject as extra text.
+function! s:BuildMatchDictionary(rev_list)
+	let matches = []
+	let commits = split(a:rev_list, '\n')
+
+	for commit in commits
+		let commit_parts = split(commit)
+		let sha = commit_parts[0]
+		let subject = commit_parts[1]
+
+		call add(matches, {
+			\ 'word': sha,
+			\ 'menu': subject
+		\ })
+	endfor
+
+	return matches
+endfunction
+
 " Allow mappings to initiate completion
 function! gitcha#StartGitSHACompletion()
 	set completefunc=gitcha#GitSHAComplete