Add --hash-file command, for convenience

2 files changed, 32 insertions, 1 deletions

diff --git a/src/ccache.c b/src/ccache.c
index eaa9b308..4fd25505 100644
--- a/src/ccache.c
+++ b/src/ccache.c
@@ -3486,12 +3486,14 @@ static int
 ccache_main_options(int argc, char *argv[])
 {
 	enum longopts {
-		DUMP_MANIFEST
+		DUMP_MANIFEST,
+		HASH_FILE
 	};
 	static const struct option options[] = {
 		{"cleanup",       no_argument,       0, 'c'},
 		{"clear",         no_argument,       0, 'C'},
 		{"dump-manifest", required_argument, 0, DUMP_MANIFEST},
+		{"hash-file",     required_argument, 0, HASH_FILE},
 		{"help",          no_argument,       0, 'h'},
 		{"max-files",     required_argument, 0, 'F'},
 		{"max-size",      required_argument, 0, 'M'},
@@ -3502,6 +3504,8 @@ ccache_main_options(int argc, char *argv[])
 		{"zero-stats",    no_argument,       0, 'z'},
 		{0, 0, 0, 0}
 	};
+	struct mdfour md;
+	char *s;
 
 	int c;
 	while ((c = getopt_long(argc, argv, "cChF:M:o:psVz", options, NULL)) != -1) {
@@ -3510,6 +3514,19 @@ ccache_main_options(int argc, char *argv[])
 			manifest_dump(optarg, stdout);
 			break;
 
+		case HASH_FILE:
+			initialize();
+			hash_start(&md);
+			if (str_eq(optarg, "-")) {
+				hash_fd(&md, STDIN_FILENO);
+			} else {
+				hash_file(&md, optarg);
+			}
+			s = hash_result(&md);
+			puts(s);
+			free(s);
+			break;
+
 		case 'c': // --cleanup
 			initialize();
 			clean_up_all(conf);
diff --git a/test/suites/base.bash b/test/suites/base.bash
index 307100e8..e53d40aa 100644
--- a/test/suites/base.bash
+++ b/test/suites/base.bash
@@ -913,6 +913,20 @@ EOF
             test_failed "boolean env var '$invalid_val' should be rejected"
         fi
     done
+
+    # -------------------------------------------------------------------------
+    TEST "--hash-file"
+
+    >empty
+    $CCACHE --hash-file empty > hash.out
+    printf "a" | $CCACHE --hash-file - >> hash.out
+
+    if grep '31d6cfe0d16ae931b73c59d7e0c089c0-0' hash.out >/dev/null 2>&1 && \
+       grep 'bde52cb31de33e46245e05fbdbd6fb24-1' hash.out >/dev/null 2>&1; then
+        : OK
+    else
+        test_failed "Unexpected output of --hash-file"
+    fi
 }
 
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