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lyx_mirror/src/ConverterCache.cpp
Christian Ridderström e30f3d76d2 Bulk cleanup/fix incorrect annotation at the end of namespaces. 
This commit does a bulk fix of incorrect annotations (comments) at the
end of namespaces.

The commit was generated by initially running clang-format, and then
from the diff of the result extracting the hunks corresponding to
fixes of namespace comments. The changes being applied and all the
results have been manually reviewed. The source code successfully
builds on macOS.

Further details on the steps below, in case they're of interest to
someone else in the future.

1. Checkout a fresh and up to date version of src/

    git pull && git checkout -- src && git status src

2. Ensure there's a suitable .clang-format in place, i.e. with options
   to fix the comment at the end of namespaces, including:

    FixNamespaceComments:                           true
    SpacesBeforeTrailingComments:                   1

and that clang-format is >= 5.0.0, by doing e.g.:

    clang-format -dump-config | grep Comments:
    clang-format --version

3. Apply clang-format to the source:

    clang-format -i $(find src -name "*.cpp" -or -name "*.h")

4. Create and filter out hunks related to fixing the namespace

    git diff -U0 src > tmp.patch
    grepdiff '^} // namespace' --output-matching=hunk tmp.patch  > fix_namespace.patch

5. Filter out hunks corresponding to simple fixes into to a separate patch:

    pcregrep -M -e '^diff[^\n]+\nindex[^\n]+\n--- [^\n]+\n\+\+\+ [^\n]+\n'  \
        -e '^@@ -[0-9]+ \+[0-9]+ @@[^\n]*\n-\}[^\n]*\n\+\}[^\n]*\n'         \
        fix_namespace.patch > fix_namespace_simple.patch

6. Manually review the simple patch and then apply it, after first
   restoring the source.

    git checkout -- src
    patch -p1 < fix_namespace_simple.path

7. Manually review the (simple) changes and then stage the changes

    git diff src
    git add src

8. Again apply clang-format and filter out hunks related to any
   remaining fixes to the namespace, this time filter with more
   context. There will be fewer hunks as all the simple cases have
   already been handled:

    clang-format -i $(find src -name "*.cpp" -or -name "*.h")
    git diff src > tmp.patch
    grepdiff '^} // namespace' --output-matching=hunk tmp.patch  > fix_namespace2.patch

9. Manually review/edit the resulting patch file to remove hunks for files
   which need to be dealt with manually, noting the file names and
   line numbers. Then restore files to as before applying clang-format
   and apply the patch:

    git checkout src
    patch -p1 < fix_namespace2.patch

10. Manually fix the files noted in the previous step. Stage files,
    review changes and commit.
2017-07-23 13:11:54 +02:00

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/**
* \file ConverterCache.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Baruch Even
* \author Angus Leeming
* \author Georg Baum
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "ConverterCache.h"
#include "Format.h"
#include "Lexer.h"
#include "LyXRC.h"
#include "Mover.h"
#include "support/convert.h"
#include "support/debug.h"
#include "support/filetools.h"
#include "support/lyxtime.h"
#include "support/Package.h"
#include "support/lassert.h"
#include <boost/crc.hpp>
#include <algorithm>
#include <fstream>
#include <iomanip>
#include <map>
#include <sstream>
using namespace std;
using namespace lyx::support;
namespace lyx {
namespace {
unsigned long do_crc(string const & s)
{
boost::crc_32_type crc;
crc = for_each(s.begin(), s.end(), crc);
return crc.checksum();
}
// FIXME THREAD
// This should be OK because it is only assigned during init()
static FileName cache_dir;
class CacheItem {
public:
CacheItem() : timestamp(0), checksum(0) {}
CacheItem(FileName const & orig_from, string const & to_format,
time_t t, unsigned long c)
: timestamp(t), checksum(c)
{
ostringstream os;
os << setw(10) << setfill('0') << do_crc(orig_from.absFileName())
<< '-' << to_format;
cache_name = FileName(addName(cache_dir.absFileName(), os.str()));
LYXERR(Debug::FILES, "Add file cache item " << orig_from
<< ' ' << to_format << ' ' << cache_name
<< ' ' << long(timestamp) << ' ' << checksum << '.');
}
~CacheItem()
{}
FileName cache_name;
time_t timestamp;
unsigned long checksum;
};
} // namespace
/** The cache contains one item per orig file and target format, so use a
* nested map to find the cache item quickly by filename and format.
*/
typedef map<string, CacheItem> FormatCacheType;
class FormatCache {
public:
/// Format of the source file
string from_format;
/// Cache target format -> item to quickly find the item by format
FormatCacheType cache;
};
typedef map<FileName, FormatCache> CacheType;
class ConverterCache::Impl {
public:
///
void readIndex();
///
void writeIndex();
///
CacheItem * find(FileName const & from, string const & format);
CacheType cache;
};
void ConverterCache::Impl::readIndex()
{
time_t const now = current_time();
FileName const index(addName(cache_dir.absFileName(), "index"));
ifstream is(index.toFilesystemEncoding().c_str());
Lexer lex;
lex.setStream(is);
while (lex.isOK()) {
if (!lex.next(true))
break;
string const orig_from = lex.getString();
if (!lex.next())
break;
string const to_format = lex.getString();
if (!lex.next())
break;
time_t const timestamp =
convert<unsigned long>(lex.getString());
if (!lex.next())
break;
unsigned long const checksum =
convert<unsigned long>(lex.getString());
FileName const orig_from_name(orig_from);
CacheItem item(orig_from_name, to_format, timestamp, checksum);
// Don't cache files that do not exist anymore
if (!orig_from_name.exists()) {
LYXERR(Debug::FILES, "Not caching file `"
<< orig_from << "' (does not exist anymore).");
item.cache_name.removeFile();
continue;
}
// Don't add items that are not in the cache anymore
// This can happen if two instances of LyX are running
// at the same time and update the index file independantly.
if (!item.cache_name.exists()) {
LYXERR(Debug::FILES, "Not caching file `" << orig_from
<< "' (cached copy does not exist anymore).");
continue;
}
// Delete the cached file if it is too old
if (difftime(now, item.cache_name.lastModified())
> lyxrc.converter_cache_maxage) {
LYXERR(Debug::FILES, "Not caching file `"
<< orig_from << "' (too old).");
item.cache_name.removeFile();
continue;
}
FormatCache & format_cache = cache[orig_from_name];
if (format_cache.from_format.empty())
format_cache.from_format =
// FIXME perf: This very expensive function is called on all
// cached files on opening. This slows LyX startup a lot. It
// would be better if this information was retrieved in a
// delayed fashion.
theFormats().getFormatFromFile(orig_from_name);
format_cache.cache[to_format] = item;
}
is.close();
}
void ConverterCache::Impl::writeIndex()
{
FileName const index(addName(cache_dir.absFileName(), "index"));
ofstream os(index.toFilesystemEncoding().c_str());
os.close();
if (!index.changePermission(0600))
return;
os.open(index.toFilesystemEncoding().c_str());
CacheType::iterator it1 = cache.begin();
CacheType::iterator const end1 = cache.end();
for (; it1 != end1; ++it1) {
FormatCacheType const & format_cache = it1->second.cache;
FormatCacheType::const_iterator it2 = format_cache.begin();
FormatCacheType::const_iterator const end2 = format_cache.end();
for (; it2 != end2; ++it2)
os << Lexer::quoteString(it1->first.absFileName())
<< ' ' << it2->first << ' '
<< it2->second.timestamp << ' '
<< it2->second.checksum << '\n';
}
os.close();
}
CacheItem * ConverterCache::Impl::find(FileName const & from,
string const & format)
{
if (!lyxrc.use_converter_cache)
return 0;
CacheType::iterator const it1 = cache.find(from);
if (it1 == cache.end())
return 0;
FormatCacheType & format_cache = it1->second.cache;
FormatCacheType::iterator const it2 = format_cache.find(format);
if (it2 == format_cache.end())
return 0;
return &(it2->second);
}
/////////////////////////////////////////////////////////////////////
//
// ConverterCache
//
/////////////////////////////////////////////////////////////////////
ConverterCache::ConverterCache()
: pimpl_(new Impl)
{}
ConverterCache::~ConverterCache()
{
delete pimpl_;
}
ConverterCache & ConverterCache::get()
{
// Now return the cache
static ConverterCache singleton;
return singleton;
}
void ConverterCache::init()
{
if (!lyxrc.use_converter_cache)
return;
// We do this here and not in the constructor because package() gets
// initialized after all static variables.
cache_dir = FileName(addName(package().user_support().absFileName(), "cache"));
if (!cache_dir.exists())
if (!cache_dir.createDirectory(0700)) {
lyxerr << "Could not create cache directory `"
<< cache_dir << "'." << endl;
exit(EXIT_FAILURE);
}
get().pimpl_->readIndex();
}
void ConverterCache::writeIndex() const
{
if (!lyxrc.use_converter_cache
|| cache_dir.empty())
return;
pimpl_->writeIndex();
}
void ConverterCache::add(FileName const & orig_from, string const & to_format,
FileName const & converted_file) const
{
if (!lyxrc.use_converter_cache || orig_from.empty() ||
converted_file.empty())
return;
LYXERR(Debug::FILES, ' ' << orig_from
<< ' ' << to_format << ' ' << converted_file);
// FIXME: Should not hardcode this (see bug 3819 for details)
if (to_format == "pstex") {
FileName const converted_eps(changeExtension(converted_file.absFileName(), "eps"));
add(orig_from, "eps", converted_eps);
} else if (to_format == "pdftex") {
FileName const converted_pdf(changeExtension(converted_file.absFileName(), "pdf"));
add(orig_from, "pdf6", converted_pdf);
}
// Is the file in the cache already?
CacheItem * item = pimpl_->find(orig_from, to_format);
time_t const timestamp = orig_from.lastModified();
Mover const & mover = getMover(to_format);
if (item) {
LYXERR(Debug::FILES, "ConverterCache::add(" << orig_from << "):\n"
"The file is already in the cache.");
// First test for timestamp
if (timestamp == item->timestamp) {
LYXERR(Debug::FILES, "Same timestamp.");
return;
}
// Maybe the contents is still the same?
item->timestamp = timestamp;
unsigned long const checksum = orig_from.checksum();
if (checksum == item->checksum) {
LYXERR(Debug::FILES, "Same checksum.");
return;
}
item->checksum = checksum;
if (!mover.copy(converted_file, item->cache_name,
onlyFileName(item->cache_name.absFileName()))) {
LYXERR(Debug::FILES, "Could not copy file " << orig_from << " to "
<< item->cache_name);
} else if (!item->cache_name.changePermission(0600)) {
LYXERR(Debug::FILES, "Could not change file mode"
<< item->cache_name);
}
} else {
CacheItem new_item(orig_from, to_format, timestamp,
orig_from.checksum());
if (mover.copy(converted_file, new_item.cache_name,
onlyFileName(new_item.cache_name.absFileName()))) {
if (!new_item.cache_name.changePermission(0600)) {
LYXERR(Debug::FILES, "Could not change file mode"
<< new_item.cache_name);
}
FormatCache & format_cache = pimpl_->cache[orig_from];
if (format_cache.from_format.empty())
format_cache.from_format =
theFormats().getFormatFromFile(orig_from);
format_cache.cache[to_format] = new_item;
} else
LYXERR(Debug::FILES, "ConverterCache::add(" << orig_from << "):\n"
"Could not copy file.");
}
}
void ConverterCache::remove(FileName const & orig_from,
string const & to_format) const
{
if (!lyxrc.use_converter_cache || orig_from.empty())
return;
LYXERR(Debug::FILES, orig_from << ' ' << to_format);
CacheType::iterator const it1 = pimpl_->cache.find(orig_from);
if (it1 == pimpl_->cache.end())
return;
FormatCacheType & format_cache = it1->second.cache;
FormatCacheType::iterator const it2 = format_cache.find(to_format);
if (it2 == format_cache.end())
return;
format_cache.erase(it2);
if (format_cache.empty())
pimpl_->cache.erase(it1);
}
void ConverterCache::remove_all(string const & from_format,
string const & to_format) const
{
if (!lyxrc.use_converter_cache)
return;
CacheType::iterator it1 = pimpl_->cache.begin();
while (it1 != pimpl_->cache.end()) {
if (it1->second.from_format != from_format) {
++it1;
continue;
}
FormatCacheType & format_cache = it1->second.cache;
FormatCacheType::iterator it2 = format_cache.begin();
while (it2 != format_cache.end()) {
if (it2->first == to_format) {
LYXERR(Debug::FILES, "Removing file cache item "
<< it1->first << ' ' << to_format);
it2->second.cache_name.removeFile();
format_cache.erase(it2);
// Have to start over again since items in a
// map are not ordered
it2 = format_cache.begin();
} else {
++it2;
}
}
if (format_cache.empty()) {
pimpl_->cache.erase(it1);
// Have to start over again since items in a map are
// not ordered
it1 = pimpl_->cache.begin();
} else {
++it1;
}
}
pimpl_->writeIndex();
}
bool ConverterCache::inCache(FileName const & orig_from,
string const & to_format) const
{
if (!lyxrc.use_converter_cache || orig_from.empty())
return false;
LYXERR(Debug::FILES, orig_from << ' ' << to_format);
CacheItem * const item = pimpl_->find(orig_from, to_format);
if (!item) {
LYXERR(Debug::FILES, "not in cache.");
return false;
}
// Special handling of pstex and pdftex formats: These are only
// considered to be in the cache if the corresponding graphics
// fiels are there as well. Otherwise copy() of the graphics below
// would fail.
// FIXME: Should not hardcode this (see bug 3819 for details)
if (to_format == "pstex") {
if (!inCache(orig_from, "eps"))
return false;
} else if (to_format == "pdftex") {
if (!inCache(orig_from, "pdf6"))
return false;
}
time_t const timestamp = orig_from.lastModified();
if (item->timestamp == timestamp) {
LYXERR(Debug::FILES, "identical timestamp.");
return true;
}
if (item->checksum == orig_from.checksum()) {
item->timestamp = timestamp;
LYXERR(Debug::FILES, "identical checksum.");
return true;
}
LYXERR(Debug::FILES, "in cache, but too old.");
return false;
}
FileName const & ConverterCache::cacheName(FileName const & orig_from,
string const & to_format) const
{
LYXERR(Debug::FILES, orig_from << ' ' << to_format);
CacheItem * const item = pimpl_->find(orig_from, to_format);
LASSERT(item, { static const FileName fn; return fn; });
return item->cache_name;
}
bool ConverterCache::copy(FileName const & orig_from, string const & to_format,
FileName const & dest) const
{
if (!lyxrc.use_converter_cache || orig_from.empty() || dest.empty())
return false;
LYXERR(Debug::FILES, orig_from << ' ' << to_format << ' ' << dest);
// FIXME: Should not hardcode this (see bug 3819 for details)
if (to_format == "pstex") {
FileName const dest_eps(changeExtension(dest.absFileName(), "eps"));
if (!copy(orig_from, "eps", dest_eps))
return false;
} else if (to_format == "pdftex") {
FileName const dest_pdf(changeExtension(dest.absFileName(), "pdf"));
if (!copy(orig_from, "pdf6", dest_pdf))
return false;
}
CacheItem * const item = pimpl_->find(orig_from, to_format);
LASSERT(item, return false);
Mover const & mover = getMover(to_format);
return mover.copy(item->cache_name, dest,
onlyFileName(dest.absFileName()));
}
} // namespace lyx
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