man: rewrite in Nim

Depending on Perl just for this is silly.

Now we use libregexp for filtering basically the same things as
w3mman2html did. This required another patch to QuickJS to avoid
pulling in the entire JS engine, but in return, we can now run regexes
without a dummy JS context global variable.

Also, man.nim now tries to find a man command on the system even if it's
not in /usr/bin/man.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/quickjs/quickjs.c b/lib/quickjs/quickjs.c
index a5e51d19..9c5e948c 100644
--- a/lib/quickjs/quickjs.c
+++ b/lib/quickjs/quickjs.c
@@ -43960,16 +43960,20 @@ fail:
 
 BOOL lre_check_stack_overflow(void *opaque, size_t alloca_size)
 {
+    if (!opaque)
+        return 0;
     JSContext *ctx = opaque;
     return js_check_stack_overflow(ctx->rt, alloca_size);
 }
 
+#if 0
 void *lre_realloc(void *opaque, void *ptr, size_t size)
 {
     JSContext *ctx = opaque;
     /* No JS exception is raised here */
     return js_realloc_rt(ctx->rt, ptr, size);
 }
+#endif
 
 static JSValue js_regexp_exec(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)