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#include "Python.h"
#include "osdefs.h"
#include "pythonresources.h"
/* Return the initial python search path. This is called once from
** initsys() to initialize sys.path.
**
** If USE_BUILTIN_PATH is defined the path defined here is used
** (after prepending the python home dir to each item).
** If it is not defined the path is gotten from a resource in the
** Preferences file.
**
** XXXX This code needs cleaning up. The routines here have moved
** around quite a bit, and they're pretty messy for that reason.
*/
#include <Files.h>
#include <Aliases.h>
#include <Folders.h>
#include <Resources.h>
#include <TextUtils.h>
#define PYTHONPATH "\
:\n\
:Lib\n\
:Lib:stdwin\n\
:Lib:test\n\
:Lib:mac"
char *
getpythonpath()
{
/* Modified by Jack to do something a bit more sensible:
** - Prepend the python home-directory (which is obtained from a Preferences
** resource)
** - Add :
*/
static char *pythonpath;
char *curwd;
char *p, *endp;
int newlen;
extern char *PyMac_GetPythonDir();
#ifndef USE_BUILTIN_PATH
extern char *PyMac_GetPythonPath();
#endif
if ( pythonpath ) return pythonpath;
curwd = PyMac_GetPythonDir();
#ifndef USE_BUILTIN_PATH
if ( pythonpath = PyMac_GetPythonPath(curwd) )
return pythonpath;
printf("Warning: No pythonpath resource found, using builtin default\n");
#endif
p = PYTHONPATH;
endp = p;
pythonpath = malloc(2);
if ( pythonpath == NULL ) return PYTHONPATH;
strcpy(pythonpath, ":");
while (*endp) {
endp = strchr(p, '\n');
if ( endp == NULL )
endp = p + strlen(p);
newlen = strlen(pythonpath) + 1 + strlen(curwd) + (endp-p);
pythonpath = realloc(pythonpath, newlen+1);
if ( pythonpath == NULL ) return PYTHONPATH;
strcat(pythonpath, "\n");
if ( *p == ':' ) {
p++;
strcat(pythonpath, curwd);
strncat(pythonpath, p, (endp-p));
newlen--; /* Ok, ok, we've allocated one byte too much */
} else {
/* We've allocated too much in this case */
newlen -= strlen(curwd);
pythonpath = realloc(pythonpath, newlen+1);
if ( pythonpath == NULL ) return PYTHONPATH;
strncat(pythonpath, p, (endp-p));
}
pythonpath[newlen] = '\0';
p = endp + 1;
}
return pythonpath;
}
/*
** Return the name of the Python directory
*/
char *
PyMac_GetPythonDir()
{
int item;
static char name[256];
AliasHandle handle;
FSSpec dirspec;
int ok = 0;
Boolean modified = 0, cannotmodify = 0;
short oldrh, prefrh;
short prefdirRefNum;
long prefdirDirID;
/*
** Remember old resource file and try to open preferences file
** in the preferences folder. If it doesn't exist we try to create
** it. If anything fails here we limp on, but set cannotmodify so
** we don't try to store things later on.
*/
oldrh = CurResFile();
if ( FindFolder(kOnSystemDisk, 'pref', kDontCreateFolder, &prefdirRefNum,
&prefdirDirID) != noErr ) {
/* Something wrong with preferences folder */
cannotmodify = 1;
} else {
(void)FSMakeFSSpec(prefdirRefNum, prefdirDirID, "\pPython Preferences", &dirspec);
prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
if ( prefrh == -1 ) {
#ifdef USE_MAC_MODPREFS
/* It doesn't exist. Try to create it */
FSpCreateResFile(&dirspec, 'PYTH', 'pref', 0);
prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
if ( prefrh == -1 ) {
/* This is strange, what should we do now? */
cannotmodify = 1;
} else {
UseResFile(prefrh);
}
#else
printf("Error: no Preferences file. Attempting to limp on...\n");
name[0] = 0;
getwd(name);
return name;
#endif
}
}
/* So, we've opened our preferences file, we hope. Look for the alias */
handle = (AliasHandle)Get1Resource('alis', PYTHONHOME_ID);
if ( handle ) {
/* It exists. Resolve it (possibly updating it) */
if ( ResolveAlias(NULL, handle, &dirspec, &modified) == noErr ) {
ok = 1;
}
}
if ( !ok ) {
#ifdef USE_MAC_MODPREFS
/* No luck, so far. ask the user for help */
item = Alert(NOPYTHON_ALERT, NULL);
if ( item == YES_ITEM ) {
/* The user wants to point us to a directory. Let her do so */
ok = PyMac_GetDirectory(&dirspec);
if ( ok )
modified = 1;
} else if ( item == CURWD_ITEM ) {
/* The user told us the current directory is fine. Build an FSSpec for it */
if ( getwd(name) ) {
if ( FSMakeFSSpec(0, 0, Pstring(name), &dirspec) == 0 ) {
ok = 1;
modified = 1;
}
}
}
if ( handle ) {
/* Set the (old, invalid) alias record to the new data */
UpdateAlias(NULL, &dirspec, handle, &modified);
}
#else
printf("Error: corrupted Preferences file. Attempting to limp on...\n");
name[0] = 0;
getwd(name);
return name;
#endif
}
#ifdef USE_MAC_MODPREFS
if ( ok && modified && !cannotmodify) {
/* We have a new, valid fsspec and we can update the preferences file. Do so. */
if ( !handle ) {
if (NewAlias(NULL, &dirspec, &handle) == 0 )
AddResource((Handle)handle, 'alis', PYTHONHOME_ID, "\p");
} else {
ChangedResource((Handle)handle);
}
UpdateResFile(prefrh);
}
#endif
if ( !cannotmodify ) {
/* This means we have the resfile open. Close it. */
CloseResFile(prefrh);
}
/* Back to the old resource file */
UseResFile(oldrh);
/* Now turn the fsspec into a path to give back to our caller */
if ( ok ) {
ok = (nfullpath(&dirspec, name) == 0);
if ( ok ) strcat(name, ":");
}
if ( !ok ) {
/* If all fails, we return the current directory */
name[0] = 0;
(void)getwd(name);
}
return name;
}
#ifndef USE_BUILTIN_PATH
char *
PyMac_GetPythonPath(dir)
char *dir;
{
FSSpec dirspec;
short oldrh, prefrh = -1;
short prefdirRefNum;
long prefdirDirID;
char *rv;
int i, newlen;
Str255 pathitem;
/*
** Remember old resource file and try to open preferences file
** in the preferences folder.
*/
oldrh = CurResFile();
if ( FindFolder(kOnSystemDisk, 'pref', kDontCreateFolder, &prefdirRefNum,
&prefdirDirID) == noErr ) {
(void)FSMakeFSSpec(prefdirRefNum, prefdirDirID, "\pPython Preferences", &dirspec);
prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
}
/* At this point, we may or may not have the preferences file open, and it
** may or may not contain a sys.path STR# resource. We don't care, if it doesn't
** exist we use the one from the application (the default).
** We put an initial '\n' in front of the path that we don't return to the caller
*/
if( (rv = malloc(2)) == NULL )
goto out;
strcpy(rv, "\n");
for(i=1; ; i++) {
GetIndString(pathitem, PYTHONPATH_ID, i);
if( pathitem[0] == 0 )
break;
if ( pathitem[0] >= 9 && strncmp((char *)pathitem+1, "$(PYTHON)", 9) == 0 ) {
/* We have to put the directory in place */
newlen = strlen(rv) + strlen(dir) + (pathitem[0]-9) + 2;
if( (rv=realloc(rv, newlen)) == NULL)
goto out;
strcat(rv, dir);
/* Skip a colon at the beginning of the item */
if ( pathitem[0] > 9 && pathitem[1+9] == ':' ) {
memcpy(rv+strlen(rv), pathitem+1+10, pathitem[0]-10);
newlen--;
} else {
memcpy(rv+strlen(rv), pathitem+1+9, pathitem[0]-9);
}
rv[newlen-2] = '\n';
rv[newlen-1] = 0;
} else {
/* Use as-is */
newlen = strlen(rv) + (pathitem[0]) + 2;
if( (rv=realloc(rv, newlen)) == NULL)
goto out;
memcpy(rv+strlen(rv), pathitem+1, pathitem[0]);
rv[newlen-2] = '\n';
rv[newlen-1] = 0;
}
}
if( strlen(rv) == 1) {
free(rv);
rv = NULL;
}
if ( rv ) {
rv[strlen(rv)-1] = 0;
rv++;
}
out:
if ( prefrh ) {
CloseResFile(prefrh);
UseResFile(oldrh);
}
return rv;
}
#endif /* !USE_BUILTIN_PATH */
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