rred: Only call pkgInitConfig() in test mode

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index b379d384d7b60f08493f7348362cc277e7dcf4c8..5a1053019e97bf8c7354748e111d502996f958cd 100644 (file)
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -7,6 +7,7 @@
 
 #include <config.h>
 
+#include <apt-pkg/init.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/acquire-method.h>
@@ -39,7 +40,7 @@ class MemBlock {
    char *free;
    MemBlock *next;
 
-   MemBlock(size_t size) : size(size), next(NULL)
+   explicit MemBlock(size_t size) : size(size), next(NULL)
    {
       free = start = new char[size];
    }
@@ -118,7 +119,7 @@ struct Change {
    size_t add_len; /* bytes */
    char *add;
 
-   Change(size_t off)
+   explicit Change(size_t off)
    {
       offset = off;
       del_cnt = add_cnt = add_len = 0;
@@ -689,6 +690,7 @@ int main(int argc, char **argv)
 {
    int i;
    bool just_diff = true;
+   bool test = false;
    Patch patch;
 
    if (argc <= 1) {
@@ -696,7 +698,14 @@ int main(int argc, char **argv)
       return Mth.Run();
    }
 
-   if (argc > 1 && strcmp(argv[1], "-f") == 0) {
+   // Usage: rred -t input output diff ...
+   if (argc > 1 && strcmp(argv[1], "-t") == 0) {
+      // Read config files so we see compressors.
+      pkgInitConfig(*_config);
+      just_diff = false;
+      test = true;
+      i = 4;
+   } else if (argc > 1 && strcmp(argv[1], "-f") == 0) {
       just_diff = false;
       i = 2;
    } else {
@@ -716,7 +725,13 @@ int main(int argc, char **argv)
       }
    }
 
-   if (just_diff) {
+   if (test) {
+      FileFd out, inp;
+      std::cerr << "Patching " << argv[2] << " into " << argv[3] << "\n";
+      inp.Open(argv[2], FileFd::ReadOnly,FileFd::Extension);
+      out.Open(argv[3], FileFd::WriteOnly | FileFd::Create, FileFd::Extension);
+      patch.apply_against_file(out, inp);
+   } else if (just_diff) {
       FileFd out;
       out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::Create);
       patch.write_diff(out);