cmd/join: add a new -o (output filename) option.

This is a helpful way to have it open and write to the given output file.

Signed-off-by: Avery Pennarun <apenwarr@gmail.com>

cmd/join-cmd.py

@@ -8,6 +8,7 @@
 bup join [-r host:path] [refs or hashes...]
 --
 r,remote=  remote repository path
+o=         output filename
 """
 o = options.Options(optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
@@ -26,12 +27,17 @@
     cp = git.CatPipe()
     cat = cp.join
 
+if opt.o:
+    outfile = open(opt.o, 'wb')
+else:
+    outfile = sys.stdout
+
 for id in extra:
     try:
         for blob in cat(id):
-            sys.stdout.write(blob)
+            outfile.write(blob)
     except KeyError, e:
-        sys.stdout.flush()
+        outfile.flush()
         log('error: %s\n' % e)
         ret = 1
 

t/test.sh

@@ -166,7 +166,7 @@ WVPASS bup memtest -c1 -n100 --existing
 WVSTART "join"
 WVPASS bup join $(cat tags1.tmp) >out1.tmp
 WVPASS bup join <tags2.tmp >out2.tmp
-WVPASS bup join <tags2t.tmp >out2t.tmp
+WVPASS bup join <tags2t.tmp -o out2t.tmp
 WVPASS bup join -r "$BUP_DIR" <tags2c.tmp >out2c.tmp
 WVPASS bup join -r ":$BUP_DIR" <tags2c.tmp >out2c.tmp
 WVPASS diff -u t/testfile1 out1.tmp