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37 * Implements gmx::CommandLineProgramContext.
39 * See \linktodevmanual{relocatable-binaries,developer guide section on
40 * relocatable binaries} for explanation of the searching logic.
42 * \author Teemu Murtola <teemu.murtola@gmail.com>
43 * \ingroup module_commandline
47 #include "cmdlineprogramcontext.h"
57 #include "buildinfo.h"
58 #include "gromacs/utility/exceptions.h"
59 #include "gromacs/utility/gmxassert.h"
60 #include "gromacs/utility/mutex.h"
61 #include "gromacs/utility/path.h"
62 #include "gromacs/utility/stringutil.h"
70 //! \addtogroup module_commandline
74 * Quotes a string if it contains spaces.
76 std::string quoteIfNecessary(const char* str)
78 const bool bSpaces = (std::strchr(str, ' ') != nullptr);
81 return formatString("'%s'", str);
87 * Default implementation for IExecutableEnvironment.
89 * Used if IExecutableEnvironment is not explicitly provided when
90 * constructing CommandLineProgramContext.
92 class DefaultExecutableEnvironment : public IExecutableEnvironment
95 //! Allocates a default environment.
96 static ExecutableEnvironmentPointer create()
98 return ExecutableEnvironmentPointer(new DefaultExecutableEnvironment());
101 DefaultExecutableEnvironment() : initialWorkingDirectory_(Path::getWorkingDirectory()) {}
103 std::string getWorkingDirectory() const override { return initialWorkingDirectory_; }
104 std::vector<std::string> getExecutablePaths() const override
106 return Path::getExecutablePaths();
110 std::string initialWorkingDirectory_;
114 * Finds the absolute path of the binary from \c argv[0].
116 * \param[in] invokedName \c argv[0] the binary was invoked with.
117 * \param[in] env Executable environment.
118 * \returns The full path of the binary.
120 * If a binary with the given name cannot be located, \p invokedName is
123 std::string findFullBinaryPath(const std::string& invokedName, const IExecutableEnvironment& env)
125 std::string searchName = invokedName;
126 // On Windows & Cygwin we need to add the .exe extension,
127 // or we wont be able to detect that the file exists.
128 #if GMX_NATIVE_WINDOWS || GMX_CYGWIN
129 if (!endsWith(searchName, ".exe"))
131 searchName.append(".exe");
134 if (!Path::containsDirectory(searchName))
136 // No directory in name means it must be in the path - search it!
137 std::vector<std::string> pathEntries = env.getExecutablePaths();
138 std::vector<std::string>::const_iterator i;
139 for (i = pathEntries.begin(); i != pathEntries.end(); ++i)
141 const std::string& dir = i->empty() ? env.getWorkingDirectory() : *i;
142 std::string testPath = Path::join(dir, searchName);
143 if (File::exists(testPath, File::returnFalseOnError))
149 else if (!Path::isAbsolute(searchName))
151 // Name contains directories, but is not absolute, i.e.,
152 // it is relative to the current directory.
153 std::string cwd = env.getWorkingDirectory();
154 std::string testPath = Path::join(cwd, searchName);
161 * Returns whether given path contains files from `share/top/`.
163 * Only checks for a single file that has an uncommon enough name.
165 bool isAcceptableLibraryPath(const std::string& path)
167 return Path::exists(Path::join(path, "residuetypes.dat"));
171 * Returns whether given path prefix contains files from `share/top/`.
173 * \param[in] path Path prefix to check.
174 * \returns `true` if \p path contains the data files.
176 * Checks whether \p path could be the installation prefix where `share/top/`
177 * files have been installed: appends the relative installation path of the
178 * data files and calls isAcceptableLibraryPath().
180 bool isAcceptableLibraryPathPrefix(const std::string& path)
182 std::string testPath = Path::join(path, GMX_INSTALL_GMXDATADIR, "top");
183 return isAcceptableLibraryPath(testPath);
187 * Returns a fallback installation prefix path.
189 * Checks a few standard locations for the data files before returning a
190 * configure-time hard-coded path. The hard-coded path is preferred if it
191 * actually contains the data files, though.
193 std::string findFallbackInstallationPrefixPath()
195 #if !GMX_NATIVE_WINDOWS
196 if (!isAcceptableLibraryPathPrefix(CMAKE_INSTALL_PREFIX))
198 if (isAcceptableLibraryPathPrefix("/usr/local"))
202 if (isAcceptableLibraryPathPrefix("/usr"))
206 if (isAcceptableLibraryPathPrefix("/opt"))
212 return CMAKE_INSTALL_PREFIX;
216 * Generic function to find data files based on path of the binary.
218 * \param[in] binaryPath Absolute path to the binary.
219 * \param[out] bSourceLayout Set to `true` if the binary is run from
220 * the build tree and the original source directory can be found.
221 * \returns Path to the `share/top/` data files.
223 * The search based on the path only works if the binary is in the same
224 * relative path as the installed \Gromacs binaries. If the binary is
225 * somewhere else, a hard-coded fallback is used. This doesn't work if the
226 * binaries are somewhere else than the path given during configure time...
228 * Extra logic is present to allow running binaries from the build tree such
229 * that they use up-to-date data files from the source tree.
231 std::string findInstallationPrefixPath(const std::string& binaryPath, bool* bSourceLayout)
233 *bSourceLayout = false;
234 // Don't search anything if binary cannot be found.
235 if (Path::exists(binaryPath))
237 // Remove the executable name.
238 std::string searchPath = Path::getParentPath(binaryPath);
239 // If running directly from the build tree, try to use the source
241 #if (defined CMAKE_SOURCE_DIR && defined CMAKE_BINARY_DIR)
242 std::string buildBinPath;
243 # ifdef CMAKE_INTDIR /*In multi-configuration build systems the output subdirectory*/
244 buildBinPath = Path::join(CMAKE_BINARY_DIR, "bin", CMAKE_INTDIR);
246 buildBinPath = Path::join(CMAKE_BINARY_DIR, "bin");
248 if (Path::isEquivalent(searchPath, buildBinPath))
250 std::string testPath = Path::join(CMAKE_SOURCE_DIR, "share/top");
251 if (isAcceptableLibraryPath(testPath))
253 *bSourceLayout = true;
254 return CMAKE_SOURCE_DIR;
259 // Use the executable path to (try to) find the library dir.
260 // TODO: Consider only going up exactly the required number of levels.
261 while (!searchPath.empty())
263 if (isAcceptableLibraryPathPrefix(searchPath))
267 searchPath = Path::getParentPath(searchPath);
271 // End of smart searching. If we didn't find it in our parent tree,
272 // or if the program name wasn't set, return a fallback.
273 return findFallbackInstallationPrefixPath();
280 /********************************************************************
281 * CommandLineProgramContext::Impl
284 class CommandLineProgramContext::Impl
288 Impl(int argc, const char* const argv[], ExecutableEnvironmentPointer env);
291 * Finds the full binary path if it isn't searched yet.
293 * Sets \a fullBinaryPath_ if it isn't set yet.
295 * The \a binaryPathMutex_ should be locked by the caller before
296 * calling this function.
298 void findBinaryPath() const;
300 ExecutableEnvironmentPointer executableEnv_;
301 std::string invokedName_;
302 std::string programName_;
303 std::string displayName_;
304 std::string commandLine_;
305 mutable std::string fullBinaryPath_;
306 mutable std::string installationPrefix_;
307 mutable bool bSourceLayout_;
308 mutable Mutex binaryPathMutex_;
311 CommandLineProgramContext::Impl::Impl() : programName_("GROMACS"), bSourceLayout_(false) {}
313 CommandLineProgramContext::Impl::Impl(int argc, const char* const argv[], ExecutableEnvironmentPointer env) :
314 executableEnv_(std::move(env)),
315 invokedName_(argc != 0 ? argv[0] : ""),
316 bSourceLayout_(false)
318 programName_ = Path::getFilename(invokedName_);
319 programName_ = stripSuffixIfPresent(programName_, ".exe");
321 commandLine_ = quoteIfNecessary(programName_.c_str());
322 for (int i = 1; i < argc; ++i)
324 commandLine_.append(" ");
325 commandLine_.append(quoteIfNecessary(argv[i]));
329 void CommandLineProgramContext::Impl::findBinaryPath() const
331 if (fullBinaryPath_.empty())
333 fullBinaryPath_ = findFullBinaryPath(invokedName_, *executableEnv_);
334 fullBinaryPath_ = Path::normalize(Path::resolveSymlinks(fullBinaryPath_));
335 // TODO: Investigate/Consider using a dladdr()-based solution.
336 // Potentially less portable, but significantly simpler, and also works
337 // with user binaries even if they are located in some arbitrary location,
338 // as long as shared libraries are used.
342 /********************************************************************
343 * CommandLineProgramContext
346 CommandLineProgramContext::CommandLineProgramContext() : impl_(new Impl) {}
348 CommandLineProgramContext::CommandLineProgramContext(const char* binaryName) :
349 impl_(new Impl(1, &binaryName, DefaultExecutableEnvironment::create()))
353 CommandLineProgramContext::CommandLineProgramContext(int argc, const char* const argv[]) :
354 impl_(new Impl(argc, argv, DefaultExecutableEnvironment::create()))
358 CommandLineProgramContext::CommandLineProgramContext(int argc,
359 const char* const argv[],
360 ExecutableEnvironmentPointer env) :
361 impl_(new Impl(argc, argv, move(env)))
365 CommandLineProgramContext::~CommandLineProgramContext() {}
367 void CommandLineProgramContext::setDisplayName(const std::string& name)
369 GMX_RELEASE_ASSERT(impl_->displayName_.empty(), "Can only set display name once");
370 impl_->displayName_ = name;
373 const char* CommandLineProgramContext::programName() const
375 return impl_->programName_.c_str();
378 const char* CommandLineProgramContext::displayName() const
380 return impl_->displayName_.empty() ? impl_->programName_.c_str() : impl_->displayName_.c_str();
383 const char* CommandLineProgramContext::commandLine() const
385 return impl_->commandLine_.c_str();
388 const char* CommandLineProgramContext::fullBinaryPath() const
390 lock_guard<Mutex> lock(impl_->binaryPathMutex_);
391 impl_->findBinaryPath();
392 return impl_->fullBinaryPath_.c_str();
395 InstallationPrefixInfo CommandLineProgramContext::installationPrefix() const
397 lock_guard<Mutex> lock(impl_->binaryPathMutex_);
398 if (impl_->installationPrefix_.empty())
400 impl_->findBinaryPath();
401 impl_->installationPrefix_ = Path::normalize(
402 findInstallationPrefixPath(impl_->fullBinaryPath_, &impl_->bSourceLayout_));
404 return InstallationPrefixInfo(impl_->installationPrefix_.c_str(), impl_->bSourceLayout_);