Add test-chmtime: a utility to change mtime on files

This is intended to be a portable replacement for our usage
of date(1), touch(1), and Perl one-liners in tests.

Usage: test-chtime (+|=|-|=+|=-)<seconds> <file>..."

  '+' increments the mtime on the files by <seconds>
  '-' decrements the mtime on the files by <seconds>
  '=' sets the mtime on the file to exactly <seconds>
  '=+' and '=-' sets the mtime on the file to <seconds> after or
      before the current time.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/.gitignore b/.gitignore
index f15155d1b7bcb45db6a8d67eab51b535102353c1..eb8a1f860678ff86f3b9ca95f618226551c884cf 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -139,6 +139,7 @@ git-whatchanged
 git-write-tree
 git-core-*/?*
 gitweb/gitweb.cgi
+test-chmtime
 test-date
 test-delta
 test-dump-cache-tree

diff --git a/Makefile b/Makefile
index e51b448c78827dfc9563cda309a67281b29b873b..8a42be9babb04a2a9f6eb0fba24a5fc8b5fe59a1 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -829,7 +829,7 @@ GIT-CFLAGS: .FORCE-GIT-CFLAGS
 
 export NO_SVN_TESTS
 
-test: all
+test: all test-chmtime$X
        $(MAKE) -C t/ all
 
 test-date$X: test-date.c date.o ctype.o
@@ -844,6 +844,9 @@ test-dump-cache-tree$X: dump-cache-tree.o $(GITLIBS)
 test-sha1$X: test-sha1.o $(GITLIBS)
        $(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)
 
+test-chmtime$X: test-chmtime.c
+       $(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $<
+
 check-sha1:: test-sha1$X
        ./test-sha1.sh
 

diff --git a/test-chmtime.c b/test-chmtime.c
new file mode 100644 (file)
index 0000000..90da448
--- /dev/null
+++ b/test-chmtime.c
@@ -0,0 +1,61 @@
+#include "git-compat-util.h"
+#include <utime.h>
+
+static const char usage_str[] = "(+|=|=+|=-|-)<seconds> <file>...";
+
+int main(int argc, const char *argv[])
+{
+       int i;
+       int set_eq;
+       long int set_time;
+       char *test;
+       const char *timespec;
+
+       if (argc < 3)
+               goto usage;
+
+       timespec = argv[1];
+       set_eq = (*timespec == '=') ? 1 : 0;
+       if (set_eq) {
+               timespec++;
+               if (*timespec == '+') {
+                       set_eq = 2; /* relative "in the future" */
+                       timespec++;
+               }
+       }
+       set_time = strtol(timespec, &test, 10);
+       if (*test) {
+               fprintf(stderr, "Not a base-10 integer: %s\n", argv[1] + 1);
+               goto usage;
+       }
+       if ((set_eq && set_time < 0) || set_eq == 2) {
+               time_t now = time(NULL);
+               set_time += now;
+       }
+
+       for (i = 2; i < argc; i++) {
+               struct stat sb;
+               struct utimbuf utb;
+
+               if (stat(argv[i], &sb) < 0) {
+                       fprintf(stderr, "Failed to stat %s: %s\n",
+                               argv[i], strerror(errno));
+                       return -1;
+               }
+
+               utb.actime = sb.st_atime;
+               utb.modtime = set_eq ? set_time : sb.st_mtime + set_time;
+
+               if (utime(argv[i], &utb) < 0) {
+                       fprintf(stderr, "Failed to modify time on %s: %s\n",
+                               argv[i], strerror(errno));
+                       return -1;
+               }
+       }
+
+       return 0;
+
+usage:
+       fprintf(stderr, "Usage: %s %s\n", argv[0], usage_str);
+       return -1;
+}