rewrite all TFRewrite instances to use the new pkgTagSection::Write

While it is mostly busywork to rewrite all instances it actually fixes
bugs as the data storage used by the new method is std::string rather
than a char*, the later mostly created by c_str() from a std::string
which the caller has to ensure keeps in scope – something apt-ftparchive
actually didn't ensure and relied on copy-on-write behavior instead
which c++11 forbids and hence the new default gcc abi doesn't use it.

2 files changed, 271 insertions, 1 deletions

diff --git a/test/libapt/indexcopytosourcelist_test.cc b/test/libapt/indexcopytosourcelist_test.cc
index bec87601f..1b0427564 100644
--- a/test/libapt/indexcopytosourcelist_test.cc
+++ b/test/libapt/indexcopytosourcelist_test.cc
@@ -16,7 +16,7 @@ class NoCopy : public IndexCopy {
 	 return Path;
       }
       bool GetFile(std::string &/*Filename*/, unsigned long long &/*Size*/) { return false; }
-      bool RewriteEntry(FILE * /*Target*/, std::string /*File*/) { return false; }
+      bool RewriteEntry(FileFd & /*Target*/, std::string const &/*File*/) { return false; }
       const char *GetFileName() { return NULL; }
       const char *Type() { return NULL; }
 
diff --git a/test/libapt/tagsection_test.cc b/test/libapt/tagsection_test.cc
new file mode 100644
index 000000000..f250177af
--- /dev/null
+++ b/test/libapt/tagsection_test.cc
@@ -0,0 +1,270 @@
+#include <config.h>
+
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/tagfile.h>
+
+#include <string>
+#include <sstream>
+
+#include <gtest/gtest.h>
+
+#include "file-helpers.h"
+
+std::string packageValue = "aaaa";
+std::string typoValue = "aa\n"
+   " .\n"
+   " cc";
+std::string typoRawValue = "\n " + typoValue;
+std::string overrideValue = "1";
+/*
+   std::cerr << "FILECONTENT: »";
+   char buffer[3000];
+   while (fd.ReadLine(buffer, sizeof(buffer)))
+      std::cerr << buffer;
+   std::cerr << "«" << std::endl;;
+*/
+
+void setupTestcaseStart(FileFd &fd, pkgTagSection &section, std::string &content)
+{
+   createTemporaryFile("writesection", fd, NULL, NULL);
+   content = "Package: " + packageValue + "\n"
+      "TypoA:\n " + typoValue + "\n"
+      "Override: " + overrideValue + "\n"
+      "Override-Backup: " + overrideValue + "\n"
+      "\n";
+   EXPECT_TRUE(section.Scan(content.c_str(), content.length(), true));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoA"));
+   EXPECT_EQ(typoRawValue, section.FindRawS("TypoA"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteUnmodified)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   EXPECT_TRUE(section.Write(fd));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoA"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteUnmodifiedOrder)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   char const * const order[] = { "Package", "TypoA", "Override", NULL };
+   EXPECT_TRUE(section.Write(fd, order));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoA"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteUnmodifiedOrderReversed)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   char const * const order[] = { "Override", "TypoA", "Package", NULL };
+   EXPECT_TRUE(section.Write(fd, order));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoA"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteUnmodifiedOrderNotAll)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   char const * const order[] = { "Override", NULL };
+   EXPECT_TRUE(section.Write(fd, order));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoA"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteNoOrderRename)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Rename("TypoA", "TypoB"));
+   EXPECT_TRUE(section.Write(fd, NULL, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_FALSE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("TypoB"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoB"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteNoOrderRemove)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Remove("TypoA"));
+   rewrite.push_back(pkgTagSection::Tag::Rewrite("Override", ""));
+   EXPECT_TRUE(section.Write(fd, NULL, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_FALSE(section.Exists("TypoA"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_FALSE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(2, section.Count());
+}
+TEST(TagSectionTest,WriteNoOrderRewrite)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Rewrite("Override", "42"));
+   EXPECT_TRUE(section.Write(fd, NULL, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(42, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteOrderRename)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Rename("TypoA", "TypoB"));
+   char const * const order[] = { "Package", "TypoA", "Override", NULL };
+   EXPECT_TRUE(section.Write(fd, order, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_FALSE(section.Exists("TypoA"));
+   EXPECT_TRUE(section.Exists("TypoB"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(typoValue, section.FindS("TypoB"));
+   EXPECT_EQ(1, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}
+TEST(TagSectionTest,WriteOrderRemove)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Remove("TypoA"));
+   rewrite.push_back(pkgTagSection::Tag::Rewrite("Override", ""));
+   char const * const order[] = { "Package", "TypoA", "Override", NULL };
+   EXPECT_TRUE(section.Write(fd, order, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_FALSE(section.Exists("TypoA"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_FALSE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(2, section.Count());
+}
+TEST(TagSectionTest,WriteOrderRewrite)
+{
+   FileFd fd;
+   pkgTagSection section;
+   std::string content;
+   setupTestcaseStart(fd, section, content);
+   std::vector<pkgTagSection::Tag> rewrite;
+   rewrite.push_back(pkgTagSection::Tag::Rewrite("Override", "42"));
+   char const * const order[] = { "Package", "TypoA", "Override", NULL };
+   EXPECT_TRUE(section.Write(fd, order, rewrite));
+   EXPECT_TRUE(fd.Seek(0));
+   pkgTagFile tfile(&fd);
+   ASSERT_TRUE(tfile.Step(section));
+   EXPECT_TRUE(section.Exists("Package"));
+   EXPECT_TRUE(section.Exists("TypoA"));
+   EXPECT_FALSE(section.Exists("TypoB"));
+   EXPECT_TRUE(section.Exists("Override"));
+   EXPECT_TRUE(section.Exists("Override-Backup"));
+   EXPECT_EQ(packageValue, section.FindS("Package"));
+   EXPECT_EQ(42, section.FindI("Override"));
+   EXPECT_EQ(1, section.FindI("Override-Backup"));
+   EXPECT_EQ(4, section.Count());
+}