From 8f090c68c074d2de46e11e165e76d5e108d918be Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Sun, 13 Sep 2020 00:37:17 -0700
Subject: Don't use color for non-tty outputs, added `-m` mode argument

---
 bpeg.c |  4 +++-
 vm.c   | 16 ++++++++--------
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/bpeg.c b/bpeg.c
index 9099c26..50dc9ad 100644
--- a/bpeg.c
+++ b/bpeg.c
@@ -136,6 +136,8 @@ int main(int argc, char *argv[])
             check(p, "Pattern failed to compile");
             add_def(g, flag, "pattern", p);
             ++npatterns;
+        } else if (FLAG("--mode") || FLAG("-m")) {
+            rule = flag;
         } else if (argv[i][0] != '-') {
             if (npatterns > 0) break;
             vm_op_t *p = bpeg_stringpattern(argv[i]);
@@ -183,7 +185,7 @@ int main(int argc, char *argv[])
             printf("No match\n");
             return 1;
         } else {
-            print_match(m, "\033[0m", verbose);
+            print_match(m, isatty(STDOUT_FILENO) ? "\033[0m" : NULL, verbose);
             //printf("\033[0;2m%s\n", m->end);
         }
         freefile(input);
diff --git a/vm.c b/vm.c
index 1e2cb76..97c0e7c 100644
--- a/vm.c
+++ b/vm.c
@@ -426,7 +426,7 @@ static match_t *get_capture_named(match_t *m, const char *name)
 void print_match(match_t *m, const char *color, int verbose)
 {
     if (m->is_replacement) {
-        printf("\033[0;34m");
+        if (color) printf("\033[0;34m");
         for (const char *r = m->name_or_replacement; *r; ) {
             if (*r == '\\') {
                 ++r;
@@ -466,27 +466,27 @@ void print_match(match_t *m, const char *color, int verbose)
                 }
             }
             if (cap != NULL) {
-                print_match(cap, "\033[0;35m", verbose);
-                printf("\033[0;34m");
+                print_match(cap, color ? "\033[0;35m" : NULL, verbose);
+                if (color) printf("\033[0;34m");
             }
         }
     } else {
         const char *name = m->name_or_replacement;
         if (verbose && m->is_ref && name && isupper(name[0]))
-            printf("\033[0;2;35m{%s:", name);
+            printf(color ? "\033[0;2;35m{%s:" : "{%s", name);
         //if (m->is_capture && name)
         //    printf("\033[0;2;33m[%s:", name);
         const char *prev = m->start;
         for (match_t *child = m->child; child; child = child->nextsibling) {
             if (child->start > prev)
-                printf("%s%.*s", color, (int)(child->start - prev), prev);
-            print_match(child, m->is_capture ? "\033[0;1m" : color, verbose);
+                printf("%s%.*s", color ? color : "", (int)(child->start - prev), prev);
+            print_match(child, color ? (m->is_capture ? "\033[0;31;1m" : color) : NULL, verbose);
             prev = child->end;
         }
         if (m->end > prev)
-            printf("%s%.*s", color, (int)(m->end - prev), prev);
+            printf("%s%.*s", color ? color : "", (int)(m->end - prev), prev);
         if (verbose && m->is_ref && name && isupper(name[0]))
-            printf("\033[0;2;35m}");
+            printf(color ? "\033[0;2;35m}" : "}");
         //if (m->is_capture && name)
         //    printf("\033[0;2;33m]");
     }
-- 
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