Preserve last modification timestamps of installed files

On non-windows platforms, we use the "-p" parameter of install(1) to
preserve the last modification timestamps of files. On Windows the use
of copy does not preserve them. As a cross-platform solution, this patch
introduces a simple built-in install command in qmake to copy files.

Task-number: QTBUG-59004
Change-Id: I3064d29a2b8c7b009a1efbf8f00b84c079ea5417
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

3 files changed, 76 insertions, 57 deletions

diff --git a/qmake/library/ioutils.cpp b/qmake/library/ioutils.cpp
index 67d2f541a1..39264952c6 100644
--- a/qmake/library/ioutils.cpp
+++ b/qmake/library/ioutils.cpp
@@ -37,8 +37,13 @@
 #  include <sys/types.h>
 #  include <sys/stat.h>
 #  include <unistd.h>
+#  include <utime.h>
+#  include <fcntl.h>
+#  include <errno.h>
 #endif
 
+#define fL1S(s) QString::fromLatin1(s)
+
 QT_BEGIN_NAMESPACE
 
 using namespace QMakeInternal;
@@ -183,4 +188,69 @@ QString IoUtils::shellQuoteWin(const QString &arg)
     return ret;
 }
 
+#if defined(PROEVALUATOR_FULL)
+
+#  if defined(Q_OS_WIN)
+static QString windowsErrorCode()
+{
+    wchar_t *string = 0;
+    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
+                  NULL,
+                  GetLastError(),
+                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                  (LPWSTR)&string,
+                  0,
+                  NULL);
+    QString ret = QString::fromWCharArray(string);
+    LocalFree((HLOCAL)string);
+    return ret.trimmed();
+}
+#  endif
+
+bool IoUtils::touchFile(const QString &targetFileName, const QString &referenceFileName, QString *errorString)
+{
+#  ifdef Q_OS_UNIX
+    struct stat st;
+    if (stat(referenceFileName.toLocal8Bit().constData(), &st)) {
+        *errorString = fL1S("Cannot stat() reference file %1: %2.").arg(referenceFileName, fL1S(strerror(errno)));
+        return false;
+    }
+#    if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L
+    const struct timespec times[2] = { { 0, UTIME_NOW }, st.st_mtim };
+    const bool utimeError = utimensat(AT_FDCWD, targetFileName.toLocal8Bit().constData(), times, 0) < 0;
+#    else
+    struct utimbuf utb;
+    utb.actime = time(0);
+    utb.modtime = st.st_mtime;
+    const bool utimeError= utime(targetFileName.toLocal8Bit().constData(), &utb) < 0;
+#    endif
+    if (utimeError) {
+        *errorString = fL1S("Cannot touch %1: %2.").arg(targetFileName, fL1S(strerror(errno)));
+        return false;
+    }
+#  else
+    HANDLE rHand = CreateFile((wchar_t*)referenceFileName.utf16(),
+                              GENERIC_READ, FILE_SHARE_READ,
+                              NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (rHand == INVALID_HANDLE_VALUE) {
+        *errorString = fL1S("Cannot open reference file %1: %2").arg(referenceFileName, windowsErrorCode());
+        return false;
+        }
+    FILETIME ft;
+    GetFileTime(rHand, 0, 0, &ft);
+    CloseHandle(rHand);
+    HANDLE wHand = CreateFile((wchar_t*)targetFileName.utf16(),
+                              GENERIC_WRITE, FILE_SHARE_READ,
+                              NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (wHand == INVALID_HANDLE_VALUE) {
+        *errorString = fL1S("Cannot open %1: %2").arg(targetFileName, windowsErrorCode());
+        return false;
+    }
+    SetFileTime(wHand, 0, 0, &ft);
+    CloseHandle(wHand);
+#  endif
+    return true;
+}
+#endif
+
 QT_END_NAMESPACE
diff --git a/qmake/library/ioutils.h b/qmake/library/ioutils.h
index a806f3d2eb..905974b7cb 100644
--- a/qmake/library/ioutils.h
+++ b/qmake/library/ioutils.h
@@ -62,6 +62,9 @@ public:
 #else
         { return shellQuoteWin(arg); }
 #endif
+#if defined(PROEVALUATOR_FULL)
+    static bool touchFile(const QString &targetFileName, const QString &referenceFileName, QString *errorString);
+#endif
 };
 
 } // namespace ProFileEvaluatorInternal
diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index 461f46e705..2bb6f2e12d 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -56,9 +56,7 @@
 
 #ifdef Q_OS_UNIX
 #include <time.h>
-#include <utime.h>
 #include <errno.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <signal.h>
 #include <sys/wait.h>
@@ -256,23 +254,6 @@ QMakeEvaluator::getMemberArgs(const ProKey &func, int srclen, const ProStringLis
     return true;
 }
 
-#if defined(Q_OS_WIN) && defined(PROEVALUATOR_FULL)
-static QString windowsErrorCode()
-{
-    wchar_t *string = 0;
-    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
-                  NULL,
-                  GetLastError(),
-                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                  (LPWSTR)&string,
-                  0,
-                  NULL);
-    QString ret = QString::fromWCharArray(string);
-    LocalFree((HLOCAL)string);
-    return ret.trimmed();
-}
-#endif
-
 QString
 QMakeEvaluator::quoteValue(const ProString &val)
 {
@@ -1813,46 +1794,11 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinConditional(
 #ifdef PROEVALUATOR_FULL
         const QString &tfn = resolvePath(args.at(0).toQString(m_tmp1));
         const QString &rfn = resolvePath(args.at(1).toQString(m_tmp2));
-#ifdef Q_OS_UNIX
-        struct stat st;
-        if (stat(rfn.toLocal8Bit().constData(), &st)) {
-            evalError(fL1S("Cannot stat() reference file %1: %2.").arg(rfn, fL1S(strerror(errno))));
+        QString error;
+        if (!IoUtils::touchFile(tfn, rfn, &error)) {
+            evalError(error);
             return ReturnFalse;
         }
-#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L
-        const struct timespec times[2] = { { 0, UTIME_NOW }, st.st_mtim };
-        const bool utimeError = utimensat(AT_FDCWD, tfn.toLocal8Bit().constData(), times, 0) < 0;
-#else
-        struct utimbuf utb;
-        utb.actime = time(0);
-        utb.modtime = st.st_mtime;
-        const bool utimeError = utime(tfn.toLocal8Bit().constData(), &utb) < 0;
-#endif
-        if (utimeError) {
-            evalError(fL1S("Cannot touch %1: %2.").arg(tfn, fL1S(strerror(errno))));
-            return ReturnFalse;
-        }
-#else
-        HANDLE rHand = CreateFile((wchar_t*)rfn.utf16(),
-                                  GENERIC_READ, FILE_SHARE_READ,
-                                  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-        if (rHand == INVALID_HANDLE_VALUE) {
-            evalError(fL1S("Cannot open reference file %1: %2").arg(rfn, windowsErrorCode()));
-            return ReturnFalse;
-        }
-        FILETIME ft;
-        GetFileTime(rHand, 0, 0, &ft);
-        CloseHandle(rHand);
-        HANDLE wHand = CreateFile((wchar_t*)tfn.utf16(),
-                                  GENERIC_WRITE, FILE_SHARE_READ,
-                                  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-        if (wHand == INVALID_HANDLE_VALUE) {
-            evalError(fL1S("Cannot open %1: %2").arg(tfn, windowsErrorCode()));
-            return ReturnFalse;
-        }
-        SetFileTime(wHand, 0, 0, &ft);
-        CloseHandle(wHand);
-#endif
 #endif
         return ReturnTrue;
     }