Source

eselect-python / python.eselect

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
7# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: $

DESCRIPTION="Manage Python symlinks"
MAINTAINER="python@gentoo.org"
SVN_DATE='$Date$'
VERSION=$(svn_date_to_version "${SVN_DATE}" )

ENV_D_PATH="${EROOT%/}/etc/env.d"
INTERPRETER_PATH="${EROOT%/}/usr/bin/"
MAN_PATH="${EROOT%/}/usr/share/man/man1/"

PYTHON_INTERPRETERS_GROUP=""

# Find a list of Python versions
find_targets() {
	local interpreter interpreters="python?.?" pypyinterpreters="pypy-c1.?"

	if [[ "${PYTHON_INTERPRETERS_GROUP}" == "1" ]]; then
		interpreters="pypy-c1.?"
	elif [[ "${PYTHON_INTERPRETERS_GROUP}" == "2" ]]; then
		interpreters="python2.?"
	elif [[ "${PYTHON_INTERPRETERS_GROUP}" == "3" ]]; then
		interpreters="python3.?"
	fi

	# Think twice before adding jython to this list. /usr/bin/jython
	# is a bash wrapper that calls java-config, which is a Python
	# script, so you need a valid /usr/bin/python to start jython. Adding pypy
	for interpreter in "${INTERPRETER_PATH}"${interpreters} "${INTERPRETER_PATH}"${pypyinterpreters}; do
		if [[ -f "${interpreter}" ]]; then
			echo ${interpreter#${INTERPRETER_PATH}}
		fi
	done
}

set_python() {
	local symlink="${INTERPRETER_PATH}python" target="${1}"
	ln -s python-wrapper "${symlink}"
	echo "${target}" > "${ENV_D_PATH}/python/config"
}

set_python_config() {
	local script="${INTERPRETER_PATH}python-config" pyscript=${INTERPRETER_PATH}pypy-config target="${1}"
	if [[ "${target:0:6}" == "python" ]]; then
		cat << EOF > "${script}"
#!/usr/bin/env bash
# Gentoo python-config wrapper script

[[ "\${EPYTHON}" =~ (/|^python\$) ]] && EPYTHON="${target/-config-/}"
python_config="\${EPYTHON/python/python-config-}"
"\${0%/*}/\${python_config:-${target}}" "\$@"
EOF
        chmod a+rx "${script}"
        elif [[ "${target:0:6}" == "pypy-c" ]]; then
                cat << EOF > "${pyscript}"
#!/usr/bin/env bash
# Gentoo python-config wrapper script

[[ "\${EPYTHON}" =~ (/|^python\$) ]] && EPYTHON="${target/-config-/}"
python_config="\${EPYTHON/python/python-config-}"
"\${0%/*}/\${python_config:-${target}}" "\$@"
EOF
	chmod a+rx "${pyscript}"
	fi
	# We always need a "${script}"
	ln -s "${pyscript}" "${script}"
}

# Try to remove python and python.1 symlinks
remove_symlinks() {
	local symlink symlink_target symlink_target_found
	if [[ "${SET_MAIN_ACTIVE_PYTHON_INTERPRETER}" == "1" ]]; then
		rm -f "${INTERPRETER_PATH}"{idle,pydoc,python,pypy,python-config,pythonw} &> /dev/null || return 1
		rm -f "${MAN_PATH}"python.1{,.gz,.bz2,.lzma,.xz} &> /dev/null || return 1
	fi

	for symlink in "${INTERPRETER_PATH}python"? "${INTERPRETER_PATH}pypy-c"?; do
		[[ ! -L "${symlink}" ]] && continue
		symlink_target_found=0
		for symlink_target in "${symlink}".?; do
			[[ -f "${symlink_target}" ]] && symlink_target_found=1
		done
		if [[ "${symlink_target_found}" -eq 0 ]]; then
			rm -f "${symlink}"
		fi
	done

	# Files of Mac OS X framework
	rm -f "${INTERPRETER_PATH%/bin/}/lib/Python.framework}"/{Headers,Python,Resources}
}

# Set a man page symlink; pypy apparently does not come with man pages
set_man_symlink() {
	local target="${1}" x extension

	for x in ".1" ".1.bz2" ".1.gz" ".1.lzma" ".1.xz"; do
		if [[ -e "${MAN_PATH}${target}${x}" ]]; then
			extension="${x}"
			break
		fi
	done

	if [[ -z "${extension}" && "${target:0:4}" != "pypy" ]]; then
		echo "Couldn't find a man page for ${target}; skipping." 1>&2
		return 1
	fi

	pushd "${MAN_PATH}" 1> /dev/null
	if [[ "${target:0:4}" != "pypy" ]]; then
		ln -nfs "${target}${extension}" "python${extension}"
	fi
	popd 1> /dev/null
}

# Set python-config script and appropriate symlinks
set_scripts_and_symlinks() {
	local target="${1}" targets=($(find_targets))
	if is_number "${target}" && [[ ${target} -ge 1 ]]; then
		target=${targets[$((${target} - 1))]}
	fi

	if ! has ${target} "${targets[@]}"; then
		die -q "Invalid target ${target}"
	fi
	if [[ -f "${INTERPRETER_PATH}${target}" ]]; then
		if ! remove_symlinks; then
			die -q "Cannot remove symlinks"
		fi

		if [[ "${SET_MAIN_ACTIVE_PYTHON_INTERPRETER}" == "1" ]]; then
			set_man_symlink "${target}"
		fi

		pushd "${INTERPRETER_PATH}" 1> /dev/null

		ln -nfs "${target}" "${target%.*}"
		if [[ "${SET_MAIN_ACTIVE_PYTHON_INTERPRETER}" == "1" ]]; then
			set_python "${target}"
			set_python_config "${target/python/python-config-}"
			ln -nfs "${target/python/pydoc}" pydoc
			# idle is optionally installed
			if [[ -f "${target/python/idle}" ]]; then
				ln -nfs "${target/python/idle}" idle
			fi
			# 2to3 for >=2.6
			if [[ -f "${target/python/2to3-}" ]]; then
				ln -nfs "${target/python/2to3-}" 2to3
			fi

			# Wrapper for graphical applications on Mac OS X
			if [[ -f "${target/python/pythonw}" ]] ; then
				ln -nfs "${target/python/pythonw}" pythonw
			fi

			# Files of Mac OS X framework
			local framework_dir="${INTERPRETER_PATH%/bin/}/lib/Python.framework"
			if [[ -d "${framework_dir}" ]]; then
				local version="${target#python}"
				pushd "${framework_dir}" 1> /dev/null
				ln -nfs "Versions/${version}/Headers"
				ln -nfs "Versions/${version}/Python"
				ln -nfs "Versions/${version}/Resources"
				popd 1> /dev/null
			fi
		fi

		popd 1> /dev/null
	else
		die -q "Target \"${1}\" doesn't appear to be valid!"
	fi
}

# Set the content of /etc/env.d/65python-docs
set_python_docs() {
	local path target="${1#python}" variable
	rm -f "${ENV_D_PATH}/65python-docs"
	if [[ -f "${ENV_D_PATH}/60python-docs-${target}" ]]; then
		variable="PYTHONDOCS_${target//./_}"
		path="$(. "${ENV_D_PATH}/60python-docs-${target}"; echo -n "${!variable}")"
		if [[ -d "${path}" ]]; then
			echo "PYTHONDOCS=\"${path}\"" > "${ENV_D_PATH}/65python-docs"
		fi
	fi
}

### show action ###

describe_show() {
	echo "Show main active Python interpreter"
}

describe_show_options() {
	echo "--ABI         : Show Python ABI in format of PYTHON_ABI variable"
	echo "--pypy-c1     : Show active pypy 1 interpreter"
	echo "--python2     : Show active Python 2 interpreter"
	echo "--python3     : Show active Python 3 interpreter"
	echo ""
}

do_show() {
	local ABI="0" interpreter python2="0" python3="0" pypy1="0"
	while [[ $# > 0 ]]; do
		case "$1" in
			--ABI)
				ABI="1"
				;;
			--pypy1)
				pypy1="1"
				;;
			--python2)
				python2="1"
				;;
			--python3)
				python3="1"
				;;
			*)
				die -q "Unrecognized argument '$1'"
				;;
		esac
		shift
	done

	if [[ "${python2}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--python2' and '--python3' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python2}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python2' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python3' options cannot be specified simultaneously"
	fi

	if [[ "${pypy1}" == "1" ]]; then
		interpreter="$(readlink "${INTERPRETER_PATH}pypy-c1")"
	elif [[ "${python2}" == "1" ]]; then
		interpreter="$(readlink "${INTERPRETER_PATH}python2")"
	elif [[ "${python3}" == "1" ]]; then
		interpreter="$(readlink "${INTERPRETER_PATH}python3")"
	elif [[ -f "${ENV_D_PATH}/python/config" ]]; then
		interpreter="$(<"${ENV_D_PATH}/python/config")"
	fi

	if [[ "${ABI}" == "1" && "${interpreter:0:6}" == "python" ]]; then
		echo -n "${interpreter#python}"
	elif [[ "${ABI}" == "1" && "${interpreter:0:6}" == "pypy-c" ]]; then
		echo -n 2.7-"${interpreter/c/}"
	else
		echo -n "${interpreter}"
	fi

	if [[ -n "${interpreter}" ]]; then
		echo
	fi
}

### list action ###

describe_list() {
	echo "List installed Python interpreters"
}

describe_list_options() {
	echo "--pypy1       : List installed Pypy 1 interpreters"
	echo "--python2     : List installed Python 2 interpreters"
	echo "--python3     : List installed Python 3 interpreters"
}

do_list() {
	local active i python_descriptive_name="Python" python_version_option= python2="0" python3="0" 
	local  pypy1="0" targets=() active_version=$(do_show)

	while [[ $# > 0 ]]; do
		case "$1" in
			--pypy1)
				pypy1="1"
				python_descriptive_name="Pypy 1"
				python_version_option="--pypy1"
				PYTHON_INTERPRETERS_GROUP="1"
				;;
			--python2)
				python2="1"
				python_descriptive_name="Python 2"
				python_version_option="--python2"
				PYTHON_INTERPRETERS_GROUP="2"
				;;
			--python3)
				python3="1"
				python_descriptive_name="Python 3"
				python_version_option="--python3"
				PYTHON_INTERPRETERS_GROUP="3"
				;;
			*)
				die -q "Unrecognized argument '$1'"
				;;
		esac
		shift
	done

	if [[ "${python2}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--python2' and '--python3' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python2}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python2' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python3' options cannot be specified simultaneously"
	fi

	combined_targets=($(find_targets))
	# $(find_targets) captures pypy entries; need to filter them from the list
	if [[ $PYTHON_INTERPRETERS_GROUP > "1" ]]; then
		for (( j=0 ; j < ${#combined_targets[@]} ; j++ ))
		do
			if [[ ${combined_targets[$j]:0:4} == "pypy" ]]; then
				break
			fi
			targets[$j]="${combined_targets[$j]}"
		done


		write_list_start "Available ${python_descriptive_name} interpreters:"

		active="$(do_show ${python_version_option})"
                for ((i = 0; i < ${#targets[@]}; i++)); do
			if [[ ${targets[${i}]} == ${active} ]]; then
				targets[${i}]="$(highlight_marker "${targets[${i}]}")"
			fi
		done
		write_numbered_list -m "(none found)" "${targets[@]}"
	
	elif [[ $PYTHON_INTERPRETERS_GROUP == "1" ]]; then
		# pypy entries duplicate, filter to only 1 of each
		for (( j=0 ; j < ${#combined_targets[@]} ; j++ ))
		do
			if [[ $j -gt 0 && "${combined_targets[$j]}" == "${combined_targets[0]}" ]]; then
				break
			fi
			targets[$j]="${combined_targets[$j]}"
		done
		write_list_start "Available ${python_descriptive_name} interpreters:"

		if [[ "${active_version:0:4}" == "pypy" ]]; then
			active="$(do_show ${python_version_option})"
			for ((i = 0; i < ${#targets[@]}; i++)); do
				if [[ ${targets[${i}]} == ${active} ]]; then
				targets[${i}]="$(highlight_marker "${targets[${i}]}")"
				fi
			done
		fi			
		write_numbered_list -m "(none found)" "${targets[@]}"

	else
		targets=($(find_targets)) active=($(find_targets))
		
		write_list_start "Available ${python_descriptive_name} interpreters:"

		active="$(do_show ${python_version_option})"

		for ((i = 0; i < ${#targets[@]}; i++)); do
			if [[ ${targets[${i}]} == ${active} ]]; then
				targets[${i}]="$(highlight_marker "${targets[${i}]}")"
			fi
		done
		write_numbered_list -m "(none found)" "${targets[@]}"
	fi
}

### set action ###

describe_set() {
	echo "Set main active Python interpreter"
}

describe_set_options() {
	echo "--pypy-c1     : Set active Pypy-c 1 interpreter without setting of main active Python interpreter if it is not set to Pypy-c 1"
	echo "--python2     : Set active Python 2 interpreter without setting of main active Python interpreter if it is not set to Python 2"
	echo "--python3     : Set active Python 3 interpreter without setting of main active Python interpreter if it is not set to Python 3"
}

describe_set_parameters() {
	echo "<target>"
}

do_set() {
	local main_active_python_interpreter python2="0" python3="0" pypy1="0"
	SET_MAIN_ACTIVE_PYTHON_INTERPRETER="1"
	while [[ $# > 0 ]]; do
		case "$1" in
			--pypy1)
				pypy1="1"
				PYTHON_INTERPRETERS_GROUP="1"
				;;
			--python2)
				python2="1"
				PYTHON_INTERPRETERS_GROUP="2"
				;;
			--python3)
				python3="1"
				PYTHON_INTERPRETERS_GROUP="3"
				;;
			*)
				break
				;;
		esac
		shift
	done

	if [[ "${python2}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--python2' and '--python3' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python2}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python2' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python3' options cannot be specified simultaneously"
	fi

	if [[ $# -lt 1 ]]; then
		die -q "'eselect python set' requires Python interpreter filename"
	elif [[ $# -gt 1 ]]; then
		die -q "'eselect python set' requires 1 argument"
	else
		main_active_python_interpreter="$(do_show)"
		if [[ "${python2}" == "1" && "${main_active_python_interpreter}" != "python2."* ]]; then
			if [[ "${python3}" == "1" && "${main_active_python_interpreter}" != "python3."* ]]; then
				if [[ "${pypy1}" == "1" && "${main_active_python_interpreter}" != "pypy-c1."* ]]; then
					SET_MAIN_ACTIVE_PYTHON_INTERPRETER="0"
				fi
			fi
		fi

		if ! set_scripts_and_symlinks "${1}"; then
			die -q "Can't set new provider"
		fi

		if [[ "${SET_MAIN_ACTIVE_PYTHON_INTERPRETER}" == "1" ]]; then
			set_python_docs "${1}"
		fi
	fi
}

### update action ###

describe_update() {
	echo "Switch to the most recent CPython interpreter"
}

describe_update_options() {
	echo "--if-unset    : Do not override existing implementation"
	echo "--ignore SLOT : Ignore SLOT when setting symlinks"
	echo "--pypy-c1     : Set active Pypy-c 1 interpreter without setting of main active Python interpreter if it is not set to Pypy-c 1"
	echo "--python2     : Set active Python 2 interpreter without setting of main active Python interpreter if it is not set to Python 2"
	echo "--python3     : Set active Python 3 interpreter without setting of main active Python interpreter if it is not set to Python 3"
}

do_update() {
	local if_unset="0" ignored_slots=() interpreters="python?.?" python2="0" python3="0" pypy1="0" 
	local python_version_option= slot= target targets=()
	while [[ $# > 0 ]]; do
		case "$1" in
			--if-unset)
				if_unset="1"
				;;
			--ignore)
				ignored_slots+=("${2}")
				shift;;
			--pypy1)
				pypy1="1"
				python_version_option="--pypy-c1"
				;;
			--python2)
				python2="1"
				python_version_option="--python2"
				;;
			--python3)
				python3="1"
				python_version_option="--python3"
				;;
			*)
				die -q "Unrecognized argument '$1'"
				;;
		esac
		shift
	done

	if [[ "${python2}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--python2' and '--python3' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python2}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python2' options cannot be specified simultaneously"
	elif [[ "${pypy1}" == "1" && "${python3}" == "1" ]]; then
		die -q "'--pypy-c1' and '--python3' options cannot be specified simultaneously"
	fi

	# This reduceS by 3 lines
	if [[ "${if_unset}" == "1" && -f "${INTERPRETER_PATH}python" && -f "${ENV_D_PATH}/python/config" ]]; then
		if [[ "${pypy1}" == "1" && -f "${INTERPRETER_PATH}pypy1" ]]; then
			if [[ "${python2}" == "1" && -f "${INTERPRETER_PATH}python2" ]]; then
				if [[ "${python3}" == "1" && -f "${INTERPRETER_PATH}python3" ]]; then
					if [[ "${python2}" == "0" && "${python3}" == "0" && "${pypy1}" == "0" ]]; then
						return
					fi
				fi
			fi
		fi
	fi

	if [[ "${pypy1}" == "1" ]]; then
		interpreters="pypy-c1.?"
	elif [[ "${python2}" == "1" ]]; then
		interpreters="python2.?"
	elif [[ "${python3}" == "1" ]]; then
		interpreters="python3.?"
	fi

	targets=($(cd "${INTERPRETER_PATH}"; ls ${interpreters} 2> /dev/null | sort -r))

	# Ignore slots
	for slot in ${ignored_slots[@]}; do
		targets=(${targets[@]/python${slot}/})
	done

	if [[ ${#targets[@]} -gt 0 ]]; then
		target=${targets[0]}
		echo "Switching to ${target}"
		do_set ${python_version_option} ${target}
	else
		die -q "No Python interpreter available"
	fi
}

# vim: set ft=eselect :