ccanlint: tweak example compilation.

[ccan] / tools / ccanlint / tests / examples_compile.c

diff --git a/tools/ccanlint/tests/examples_compile.c b/tools/ccanlint/tests/examples_compile.c
index a3a3d1d595c88a5e8cfb7384c99b087aa416df64..e8fb2451e253b80181d525de76a5a42c2a1e4f70 100644 (file)
--- a/tools/ccanlint/tests/examples_compile.c
+++ b/tools/ccanlint/tests/examples_compile.c
@@ -431,6 +431,23 @@ static struct ccan_file *mangle_example(struct manifest *m,
        return f;
 }
 
+/* If an example has expected output, it's complete and should not be
+ * included in future examples. */
+static bool has_expected_output(char **lines)
+{
+       unsigned int i;
+
+       for (i = 0; lines[i]; i++) {
+               char *p = lines[i] + strspn(lines[i], " \t");
+               if (!strstarts(p, "//"))
+                       continue;
+               p += strspn(p, "/ ");
+               if (strncasecmp(p, "given", strlen("given")) == 0)
+                       return true;
+       }
+       return false;
+}
+
 static void build_examples(struct manifest *m, bool keep,
                           unsigned int *timeleft, struct score *score)
 {
@@ -450,33 +467,37 @@ static void build_examples(struct manifest *m, bool keep,
                strip_leading_whitespace(get_ccan_file_lines(i));
                ret = compile(i, m, i, keep);
                if (!ret) {
-                       prev = get_ccan_file_lines(i);
+                       char **lines = get_ccan_file_lines(i);
+                       if (!has_expected_output(lines))
+                               prev = lines;
                        score->score++;
                        continue;
                }
 
-               /* Try standalone. */
-               mangle1 = mangle_example(m, i, get_ccan_file_lines(i), keep);
-               ret1 = compile(i, m, mangle1, keep);
-               if (!ret1) {
-                       prev = get_ccan_file_lines(i);
-                       score->score++;
-                       continue;
-               }
-
-               /* Try combining with previous (successful) example... */
                if (prev) {
                        char **new = combine(i, get_ccan_file_lines(i), prev);
 
                        mangle2 = mangle_example(m, i, new, keep);
                        ret2 = compile(i, m, mangle2, keep);
                        if (!ret2) {
-                               prev = new;
+                               if (!has_expected_output(new))
+                                       prev = new;
                                score->score++;
                                continue;
                        }
                }
 
+               /* Try standalone. */
+               mangle1 = mangle_example(m, i, get_ccan_file_lines(i), keep);
+               ret1 = compile(i, m, mangle1, keep);
+               if (!ret1) {
+                       char **lines = get_ccan_file_lines(i);
+                       if (!has_expected_output(lines))
+                               prev = lines;
+                       score->score++;
+                       continue;
+               }
+
                score->pass = false;
                score->error = "Compiling extracted examples failed";
                if (!verbose) {