Steps to reproduce:
(Simple merge of two branches)
$ mkdir a && cd a && git init
$ echo file1 > file1
$ git add file1 && git commit -m initial
$ echo file1 >> file1
$ git commit -a -m "commit on master"
$ git checkout -b experimental HEAD^
$ echo file2 > file2
$ git add file2 && git commit -m "commit on experimental"
$ git checkout master && git merge experimental
$ git whatchanged --graph -m
<endless loop here>
Here is a simple patch, which solves this problem by removing constraint from
git_show_commit(). I'm not sure if this is the best solution. Maybe some upper
layer shouldn't call git_show_commit()?
Signed-off-by: Michał Kiedrowicz <michal.kiedrowicz@xxxxxxxxx>
---
diff --git a/Documentation/technical/api-history-graph.txt b/Documentation/technical/api-history-graph.txt
index d66e61b..32d961a 100644
--- a/Documentation/technical/api-history-graph.txt
+++ b/Documentation/technical/api-history-graph.txt
@@ -36,11 +36,11 @@ The following utility functions are wrappers around `graph_next_line()` and
They can all be called with a NULL graph argument, in which case no graph
output will be printed.
-* `graph_show_commit()` calls `graph_next_line()` until it returns non-zero.
- This prints all graph lines up to, and including, the line containing this
- commit. Output is printed to stdout. The last line printed does not contain
- a terminating newline. This should not be called if the commit line has
- already been printed, or it will loop forever.
+* `graph_show_commit()` calls `graph_next_line()` and
+ `graph_is_commit_finished()` until one of them return non-zero. This prints
+ all graph lines up to, and including, the line containing this commit.
+ Output is printed to stdout. The last line printed does not contain a
+ terminating newline.
* `graph_show_oneline()` calls `graph_next_line()` and prints the result to
stdout. The line printed does not contain a terminating newline.
diff --git a/graph.c b/graph.c
index e466770..049cdbc 100644
--- a/graph.c
+++ b/graph.c
@@ -1198,7 +1198,7 @@ void graph_show_commit(struct git_graph *graph)
if (!graph)
return;
- while (!shown_commit_line) {
+ while (!shown_commit_line && !graph_is_commit_finished(graph)) {
shown_commit_line = graph_next_line(graph, &msgbuf);
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
if (!shown_commit_line)
--
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