# Buildsheet autogenerated by ravenadm tool -- Do not edit.

NAMEBASE=		autoselect-python
VERSION=		5
KEYWORDS=		lang
VARIANTS=		standard
SDESC[standard]=	Dynamic links to the latest installed python
HOMEPAGE=		none
CONTACT=		nobody

DOWNLOAD_GROUPS=	none
SPKGS[standard]=	single

OPTIONS_AVAILABLE=	none
OPTIONS_STANDARD=	none

LICENSE=		ISCL:single
LICENSE_FILE=		ISCL:{{FILESDIR}}/LICENSE_ISC
LICENSE_SCHEME=		solo

SUB_FILES=		autoselect.c
SUB_LIST=		ALPHA=3.11
			BRAVO=3.12

post-patch:
	${MKDIR} ${WRKSRC}
	${CP} ${WRKDIR}/*.c ${WRKSRC}

do-build:
	(cd ${WRKSRC} && ${CC} ${CFLAGS} ${LDFLAGS} -o autoselect autoselect.c)

do-install:
.for prog in python python3 python-config python3-config 2to3 idle pydoc pip
	${INSTALL_PROGRAM} ${WRKSRC}/autoselect ${STAGEDIR}${PREFIX}/bin/${prog}
.endfor

[FILE:493:descriptions/desc.single]
This package provides:
  bin/python
  bin/python-config
  bin/pydoc
  bin/idle
  bin/2to3
  bin/pip

It automatically selects the latest version of python available.
For example, if python 3.10 and 3.11 are both installed,
bin/python executes bin/python3.11 with the same arguments.  If
python 3.11 is then deinstalled, the linkage will automatically
adjust to python 3.10.

The priority check can be overridden by setting AUTOPYTHON=<python version>
in the environment, e.g. AUTOPYTHON=3.11.


[FILE:77:manifests/plist.single]
bin/
 2to3
 idle
 pip
 pydoc
 python
 python-config
 python3
 python3-config


[FILE:742:files/LICENSE_ISC]
Copyright (c) 2018, The Ravenports Project.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


[FILE:2333:files/autoselect.c.in]
/*
 * This program will determine the latest version of python
 * installed by checking %%PREFIX%%/bin/python-<x> where <x> checks
 * all possible versions of python 3.
 * 
 * If no version is present, an error message will be displayed,
 * otherwise the versioned counterpart of the python command
 * requested will be will be executed with the same arguments
 * provided to this one.  If the versioned command isn't present, an
 * error message will be provided as a fallback.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>


int
main(int argc, char **argv)
{
	int x;
	char *cmd;
	char *override;
	char recommand[1024];
	char *pyver    = NULL;
	char *PYTHON_A = "%%PREFIX%%/bin/python%%ALPHA%%";
	char *PYTHON_B = "%%PREFIX%%/bin/python%%BRAVO%%";
	char *ALPHA    = "%%ALPHA%%";
	char *BRAVO    = "%%BRAVO%%";

	override = getenv("AUTOPYTHON");
	if (override != NULL) {
		if (strcmp (override, ALPHA) == 0) {
			pyver = ALPHA;
		} else if (strcmp (override, BRAVO) == 0) {
			pyver = BRAVO;
		}
	}
	if (pyver == NULL) {
		if (access(PYTHON_A, F_OK) != -1) {
			pyver = ALPHA;
		} else if (access(PYTHON_B, F_OK) != -1) {
			pyver = BRAVO;
		} else {
			/* no versions of python 3 are installed */
			printf ("There are no versions of python 3 installed at %%PREFIX%%/bin\n");
			exit (1);
		}
	}

	/*
	 * Get the last path element of the program name being executed
	 */
	cmd = strrchr(argv[0], '/');
	if (cmd != NULL)
		cmd++;
	else
		cmd = argv[0];

	if (strcmp (cmd, "python-config") == 0) {
		snprintf(recommand, 1024,
			"%%PREFIX%%/bin/python%s-config", pyver);
	} else if (strcmp (cmd, "python3-config") == 0) {
		snprintf(recommand, 1024,
			"%%PREFIX%%/bin/python%s-config", pyver);
	} else if (strcmp (cmd, "python3") == 0) {
		snprintf(recommand, 1024,
                        "%%PREFIX%%/bin/python%s", pyver);
	} else if (strcmp (cmd, "2to3") == 0) {
		snprintf(recommand, 1024,
			"%%PREFIX%%/bin/2to3-", pyver);
	} else {
		snprintf(recommand, 1024,
			"%%PREFIX%%/bin/%s%s", cmd, pyver);
	}
	argv[0] = recommand;
	execv(recommand, argv);

	/*
	 * Execution failed, so write out an error message
	 */
	printf ("Command execution failed: %s\n", recommand);
	printf ("               arguments:");
	for (x = 1; x < argc; x++)
		printf (" %s", argv[x]);
	printf ("\n");
	exit (1);
}