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/******************************************************************************
*
* Project: GDAL
* Purpose: gdal "dataset identify" subcommand
* Author: Even Rouault <even dot rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2025, Even Rouault <even dot rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT
****************************************************************************/
#include "gdalalg_dataset_identify.h"
#include "cpl_string.h"
//! @cond Doxygen_Suppress
#ifndef _
#define _(x) (x)
#endif
/************************************************************************/
/* GDALDatasetIdentifyAlgorithm() */
/************************************************************************/
GDALDatasetIdentifyAlgorithm::GDALDatasetIdentifyAlgorithm()
: GDALAlgorithm(NAME, DESCRIPTION, HELP_URL), m_oWriter(JSONPrint, this)
{
AddProgressArg();
auto &arg = AddArg("filename", 0, _("File or directory name"), &m_filename)
.SetPositional()
.SetRequired();
SetAutoCompleteFunctionForFilename(arg, 0);
AddOutputFormatArg(&m_format).SetChoices("json", "text");
AddArg("recursive", 'r', _("Recursively scan files/folders for datasets"),
&m_recursive);
AddArg("force-recursive", 0,
_("Recursively scan folders for datasets, forcing "
"recursion in folders recognized as valid formats"),
&m_forceRecursive);
AddArg("report-failures", 0,
_("Report failures if file type is unidentified"),
&m_reportFailures);
AddOutputStringArg(&m_output);
AddStdoutArg(&m_stdout);
}
/************************************************************************/
/* GDALDatasetIdentifyAlgorithm::Print() */
/************************************************************************/
void GDALDatasetIdentifyAlgorithm::Print(const char *str)
{
if (m_stdout)
fwrite(str, 1, strlen(str), stdout);
else
m_output += str;
}
/************************************************************************/
/* GDALDatasetIdentifyAlgorithm::JSONPrint() */
/************************************************************************/
/* static */ void GDALDatasetIdentifyAlgorithm::JSONPrint(const char *pszTxt,
void *pUserData)
{
static_cast<GDALDatasetIdentifyAlgorithm *>(pUserData)->Print(pszTxt);
}
/************************************************************************/
/* Process() */
/************************************************************************/
bool GDALDatasetIdentifyAlgorithm::Process(const char *pszTarget,
CSLConstList papszSiblingList,
GDALProgressFunc pfnProgress,
void *pProgressData)
{
if (IsCalledFromCommandLine())
pfnProgress = nullptr;
if (m_format.empty())
m_format = IsCalledFromCommandLine() ? "text" : "json";
GDALDriverH hDriver = nullptr;
{
CPLErrorStateBackuper oBackuper(CPLQuietErrorHandler);
hDriver = GDALIdentifyDriver(pszTarget, papszSiblingList);
}
if (m_format == "json")
{
if (hDriver)
{
m_oWriter.StartObj();
m_oWriter.AddObjKey("name");
m_oWriter.Add(pszTarget);
m_oWriter.AddObjKey("driver");
m_oWriter.Add(GDALGetDriverShortName(hDriver));
m_oWriter.EndObj();
}
else if (m_reportFailures)
{
m_oWriter.StartObj();
m_oWriter.AddObjKey("name");
m_oWriter.Add(pszTarget);
m_oWriter.AddObjKey("driver");
m_oWriter.AddNull();
m_oWriter.EndObj();
}
}
else
{
if (hDriver)
Print(CPLSPrintf("%s: %s\n", pszTarget,
GDALGetDriverShortName(hDriver)));
else if (m_reportFailures)
Print(CPLSPrintf("%s: unrecognized\n", pszTarget));
}
bool ret = true;
VSIStatBufL sStatBuf;
if ((m_forceRecursive || (m_recursive && hDriver == nullptr)) &&
VSIStatL(pszTarget, &sStatBuf) == 0 && VSI_ISDIR(sStatBuf.st_mode))
{
const CPLStringList aosSiblingList(VSIReadDir(pszTarget));
const int nListSize = aosSiblingList.size();
for (int i = 0; i < nListSize; ++i)
{
const char *pszSubTarget = aosSiblingList[i];
if (!(EQUAL(pszSubTarget, "..") || EQUAL(pszSubTarget, ".")))
{
const std::string osSubTarget =
CPLFormFilenameSafe(pszTarget, pszSubTarget, nullptr);
std::unique_ptr<void, decltype(&GDALDestroyScaledProgress)>
pScaledProgress(GDALCreateScaledProgress(
static_cast<double>(i) / nListSize,
static_cast<double>(i + 1) / nListSize,
pfnProgress, pProgressData),
GDALDestroyScaledProgress);
ret = ret &&
Process(osSubTarget.c_str(), aosSiblingList.List(),
pScaledProgress ? GDALScaledProgress : nullptr,
pScaledProgress.get());
}
}
}
return ret && (!pfnProgress || pfnProgress(1.0, "", pProgressData));
}
/************************************************************************/
/* GDALDatasetIdentifyAlgorithm::RunImpl() */
/************************************************************************/
bool GDALDatasetIdentifyAlgorithm::RunImpl(GDALProgressFunc pfnProgress,
void *pProgressData)
{
if (m_format.empty())
m_format = IsCalledFromCommandLine() ? "text" : "json";
if (m_format == "json")
m_oWriter.StartArray();
int i = 0;
bool ret = true;
for (const std::string &osPath : m_filename)
{
std::unique_ptr<void, decltype(&GDALDestroyScaledProgress)>
pScaledProgress(GDALCreateScaledProgress(
static_cast<double>(i) /
static_cast<int>(m_filename.size()),
static_cast<double>(i + 1) /
static_cast<int>(m_filename.size()),
pfnProgress, pProgressData),
GDALDestroyScaledProgress);
ret = ret && Process(osPath.c_str(), nullptr,
pScaledProgress ? GDALScaledProgress : nullptr,
pScaledProgress.get());
++i;
}
if (m_format == "json")
m_oWriter.EndArray();
return ret;
}
//! @endcond
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