t7800: readlink may not be available

diff --git a/diff.c b/diff.c
index 100773f5b1e63caa4d31afe605da09cb6769879b..f62b7f73d8ad52205b0add37a21fd69911783b25 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1002,8 +1002,9 @@ static void diff_words_show(struct diff_words_data *diff_words)
        xpp.flags = 0;
        /* as only the hunk header will be parsed, we need a 0-context */
        xecfg.ctxlen = 0;
-       xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words,
-                     &xpp, &xecfg);
+       if (xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words,
+                         &xpp, &xecfg))
+               die("unable to generate word diff");
        free(minus.ptr);
        free(plus.ptr);
        if (diff_words->current_plus != diff_words->plus.text.ptr +
@@ -2400,8 +2401,9 @@ static void builtin_diff(const char *name_a,
                        xecfg.ctxlen = strtoul(v, NULL, 10);
                if (o->word_diff)
                        init_diff_words_data(&ecbdata, o, one, two);
-               xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata,
-                             &xpp, &xecfg);
+               if (xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata,
+                                 &xpp, &xecfg))
+                       die("unable to generate diff for %s", one->path);
                if (o->word_diff)
                        free_diff_words_data(&ecbdata);
                if (textconv_one)
@@ -2478,8 +2480,9 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
                xpp.flags = o->xdl_opts;
                xecfg.ctxlen = o->context;
                xecfg.interhunkctxlen = o->interhunkcontext;
-               xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat,
-                             &xpp, &xecfg);
+               if (xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat,
+                                 &xpp, &xecfg))
+                       die("unable to generate diffstat for %s", one->path);
        }
 
        diff_free_filespec_data(one);
@@ -2525,8 +2528,9 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
                memset(&xecfg, 0, sizeof(xecfg));
                xecfg.ctxlen = 1; /* at least one context line */
                xpp.flags = 0;
-               xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data,
-                             &xpp, &xecfg);
+               if (xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data,
+                                 &xpp, &xecfg))
+                       die("unable to generate checkdiff for %s", one->path);
 
                if (data.ws_rule & WS_BLANK_AT_EOF) {
                        struct emit_callback ecbdata;
@@ -4425,8 +4429,10 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
                xpp.flags = 0;
                xecfg.ctxlen = 3;
                xecfg.flags = 0;
-               xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data,
-                             &xpp, &xecfg);
+               if (xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data,
+                                 &xpp, &xecfg))
+                       return error("unable to generate patch-id diff for %s",
+                                    p->one->path);
        }
 
        git_SHA1_Final(sha1, &ctx);