apk: show progress bar by default for tty controlled runs

and make the progress bar disappear on regular runs too.

src/apk.c

@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <getopt.h>
+#include <unistd.h>
 #include <sys/stat.h>
 
 #include <openssl/crypto.h>
@@ -45,6 +46,7 @@ static struct apk_option generic_options[] = {
 	{ 'f', "force",		"Do what was asked even if it looks dangerous" },
 	{ 'U', "update-cache",	"Update the repository cache" },
 	{ 0x101, "progress",	"Show a progress bar" },
+	{ 0x110, "no-progress",	"Disable progress bar even for TTYs" },
 	{ 0x102, "clean-protected", "Do not create .apk-new files to "
 				"configuration dirs" },
 	{ 0x106, "purge",	"Delete also modified configuration files on "
@@ -256,6 +258,9 @@ int main(int argc, char **argv)
 	apk_atom_init();
 	umask(0);
 
+	if (isatty(STDOUT_FILENO) && isatty(STDERR_FILENO) && isatty(STDIN_FILENO))
+		apk_flags |= APK_PROGRESS;
+
 	applet = deduce_applet(argc, argv);
 	num_options = ARRAY_SIZE(generic_options) + 1;
 	if (applet != NULL)
@@ -326,6 +331,9 @@ int main(int argc, char **argv)
 		case 0x101:
 			apk_flags |= APK_PROGRESS;
 			break;
+		case 0x110:
+			apk_flags &= ~APK_PROGRESS;
+			break;
 		case 0x102:
 			apk_flags |= APK_CLEAN_PROTECTED;
 			break;

src/state.c

@@ -655,7 +655,7 @@ static void apk_count_change(struct apk_change *change, struct apk_stats *stats)
 		stats->packages ++;
 }
 
-static inline void apk_draw_progress(int percent, int last)
+static inline void apk_draw_progress(int percent)
 {
 	char tmp[128];
 	char reset[128];
@@ -666,10 +666,7 @@ static inline void apk_draw_progress(int percent, int last)
 		tmp[2+i] = '#';
 	memset(reset, '\b', strlen(tmp));
 	fwrite(tmp, strlen(tmp), 1, stderr);
-	if (!last)
 	fwrite(reset, strlen(tmp), 1, stderr);
-	else if (apk_verbosity > 0)
-		fwrite("\n", 1, 1, stderr);
 	fflush(stderr);
 }
 
@@ -692,7 +689,7 @@ static void progress_cb(void *ctx, size_t progress)
 		       prog->total.bytes + prog->total.packages);
 
 	if (prog->count != count)
-		apk_draw_progress(count, 0);
+		apk_draw_progress(count);
 	prog->count = count;
 }
 
@@ -961,7 +958,7 @@ int apk_state_commit(struct apk_state *state,
 		apk_count_change(change, &prog.done);
 	}
 	if (apk_flags & APK_PROGRESS)
-		apk_draw_progress(100, 1);
+		apk_draw_progress(100);
 
 update_state:
 	apk_db_run_triggers(db);