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https://github.com/python/cpython
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bpo-30291 Changes to launcher so as to allow py -3-32, -2.7-64, 3.10, etc.
bpo-30291 Changes to launcher so as to allow py -3-32, -2.7-64, 3.10, etc.
This commit is contained in:
Steve (Gadget) Barnes
Steve Dower
parent
82a6384733
commit
870f6a11dd
108
PC/launcher.c
108
PC/launcher.c
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@ -171,8 +171,8 @@ static wchar_t * location_checks[] = {
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L"\\",
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L"\\PCBuild\\win32\\",
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L"\\PCBuild\\amd64\\",
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// To support early 32bit versions of Python that stuck the build binaries
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// directly in PCBuild...
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/* To support early 32bit versions of Python that stuck the build binaries
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* directly in PCBuild... */
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L"\\PCBuild\\",
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NULL
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};
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@ -234,7 +234,7 @@ locate_pythons_for_key(HKEY root, REGSAM flags)
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status = RegOpenKeyExW(root, ip_path, 0, flags, &ip_key);
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if (status != ERROR_SUCCESS) {
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winerror(status, message, MSGSIZE);
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// Note: 'message' already has a trailing \n
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/* Note: 'message' already has a trailing \n*/
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debug(L"%ls\\%ls: %ls", key_name, ip_path, message);
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continue;
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}
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@ -340,12 +340,12 @@ static void
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locate_all_pythons()
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{
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#if defined(_M_X64)
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// If we are a 64bit process, first hit the 32bit keys.
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/* If we are a 64bit process, first hit the 32bit keys. */
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debug(L"locating Pythons in 32bit registry\n");
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locate_pythons_for_key(HKEY_CURRENT_USER, KEY_READ | KEY_WOW64_32KEY);
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locate_pythons_for_key(HKEY_LOCAL_MACHINE, KEY_READ | KEY_WOW64_32KEY);
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#else
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// If we are a 32bit process on a 64bit Windows, first hit the 64bit keys.
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/* If we are a 32bit process on a 64bit Windows, first hit the 64bit keys.*/
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BOOL f64 = FALSE;
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if (IsWow64Process(GetCurrentProcess(), &f64) && f64) {
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debug(L"locating Pythons in 64bit registry\n");
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@ -353,7 +353,7 @@ locate_all_pythons()
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locate_pythons_for_key(HKEY_LOCAL_MACHINE, KEY_READ | KEY_WOW64_64KEY);
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}
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#endif
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// now hit the "native" key for this process bittedness.
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/* now hit the "native" key for this process bittedness. */
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debug(L"locating Pythons in native registry\n");
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locate_pythons_for_key(HKEY_CURRENT_USER, KEY_READ);
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locate_pythons_for_key(HKEY_LOCAL_MACHINE, KEY_READ);
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@ -370,8 +370,14 @@ find_python_by_version(wchar_t const * wanted_ver)
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size_t wlen = wcslen(wanted_ver);
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int bits = 0;
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if (wcsstr(wanted_ver, L"-32"))
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if (wcsstr(wanted_ver, L"-32")) {
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bits = 32;
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wlen -= wcslen(L"-32");
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}
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else if (wcsstr(wanted_ver, L"-64")) { /* Added option to select 64 bit explicitly */
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bits = 64;
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wlen -= wcslen(L"-64");
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}
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for (i = 0; i < num_installed_pythons; i++, ip++) {
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n = wcslen(ip->version);
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if (n > wlen)
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@ -608,14 +614,16 @@ run_child(wchar_t * cmdline)
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PROCESS_INFORMATION pi;
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#if defined(_WINDOWS)
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// When explorer launches a Windows (GUI) application, it displays
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// the "app starting" (the "pointer + hourglass") cursor for a number
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// of seconds, or until the app does something UI-ish (eg, creating a
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// window, or fetching a message). As this launcher doesn't do this
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// directly, that cursor remains even after the child process does these
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// things. We avoid that by doing a simple post+get message.
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// See http://bugs.python.org/issue17290 and
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// https://bitbucket.org/vinay.sajip/pylauncher/issue/20/busy-cursor-for-a-long-time-when-running
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/*
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When explorer launches a Windows (GUI) application, it displays
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the "app starting" (the "pointer + hourglass") cursor for a number
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of seconds, or until the app does something UI-ish (eg, creating a
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window, or fetching a message). As this launcher doesn't do this
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directly, that cursor remains even after the child process does these
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things. We avoid that by doing a simple post+get message.
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See http://bugs.python.org/issue17290 and
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https://bitbucket.org/vinay.sajip/pylauncher/issue/20/busy-cursor-for-a-long-time-when-running
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*/
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MSG msg;
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PostMessage(0, 0, 0, 0);
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@ -1040,32 +1048,49 @@ find_terminator(char * buffer, int len, BOM *bom)
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static BOOL
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validate_version(wchar_t * p)
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{
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BOOL result = TRUE;
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/*
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Version information should start with one of 2 or 3,
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Optionally followed by a period and a minor version,
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Optionally followed by a minus and one of 32 or 64.
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Valid examples:
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2
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3
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2.7
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3.6
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2.7-32
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The intent is to add to the valid patterns:
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3.10
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3-32
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3.6-64
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3-64
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*/
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BOOL result = (p != NULL); /* Default to False if null pointer. */
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if (!isdigit(*p)) /* expect major version */
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result = FALSE;
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else if (*++p) { /* more to do */
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if (*p != L'.') /* major/minor separator */
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result = result && iswdigit(*p); /* Result = False if fist string element is not a digit. */
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while (result && iswdigit(*p)) /* Require a major version */
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++p; /* Skip all leading digit(s) */
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if (result && (*p == L'.')) /* Allow . for major minor separator.*/
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{
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result = iswdigit(*++p); /* Must be at least one digit */
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while (result && iswdigit(*++p)) ; /* Skip any more Digits */
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}
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if (result && (*p == L'-')) { /* Allow - for Bits Separator */
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switch(*++p){
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case L'3': /* 3 is OK */
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result = (*++p == L'2') && !*++p; /* only if followed by 2 and ended.*/
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break;
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case L'6': /* 6 is OK */
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result = (*++p == L'4') && !*++p; /* only if followed by 4 and ended.*/
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break;
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default:
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result = FALSE;
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else {
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++p;
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if (!isdigit(*p)) /* expect minor version */
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result = FALSE;
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else {
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++p;
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if (*p) { /* more to do */
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if (*p != L'-')
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result = FALSE;
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else {
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++p;
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if ((*p != '3') && (*++p != '2') && !*++p)
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result = FALSE;
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}
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}
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}
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break;
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}
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}
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result = result && !*p; /* Must have reached EOS */
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return result;
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}
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typedef struct {
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@ -1529,7 +1554,7 @@ installed", &p[1]);
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#if defined(_M_X64)
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BOOL canDo64bit = TRUE;
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#else
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// If we are a 32bit process on a 64bit Windows, first hit the 64bit keys.
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/* If we are a 32bit process on a 64bit Windows, first hit the 64bit keys. */
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BOOL canDo64bit = FALSE;
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IsWow64Process(GetCurrentProcess(), &canDo64bit);
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#endif
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@ -1538,7 +1563,8 @@ installed", &p[1]);
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fwprintf(stdout, L"\
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Python Launcher for Windows Version %ls\n\n", version_text);
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fwprintf(stdout, L"\
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usage: %ls [ launcher-arguments ] [ python-arguments ] script [ script-arguments ]\n\n", argv[0]);
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usage:\n\
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%ls [launcher-args] [python-args] script [script-args]\n\n", argv[0]);
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fputws(L"\
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Launcher arguments:\n\n\
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-2 : Launch the latest Python 2.x version\n\
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@ -1546,7 +1572,11 @@ Launcher arguments:\n\n\
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-X.Y : Launch the specified Python version\n", stdout);
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if (canDo64bit) {
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fputws(L"\
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-X.Y-32: Launch the specified 32bit Python version", stdout);
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The above all default to 64 bit if a matching 64 bit python is present.\n\
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-X.Y-32: Launch the specified 32bit Python version\n\
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-X-32 : Launch the latest 32bit Python X version\n\
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-X.Y-64: Launch the specified 64bit Python version\n\
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-X-64 : Launch the latest 64bit Python X version", stdout);
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}
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fputws(L"\n\nThe following help text is from Python:\n\n", stdout);
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fflush(stdout);
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