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196 lines
6.8 KiB
Bash
Executable file
196 lines
6.8 KiB
Bash
Executable file
#!/usr/bin/env zsh
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# Simple script which automatically defines certain aliases for python,
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# which will automatically use certain python version
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# Versions are automatically obtained from $PYENV_ROOT/versions directories
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# NOTE: This assumes that all folders in this directory are valid python versions
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#
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# Assume we have these installed pyenv python versions 3.6.5, 3.6.12 and 3.10.1:
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# - Set full-version aliases: py3.6.5, py3.6.12 and py3.10.1
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# - Set py3 to 3.10.1 (latest with major version 3)
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# - Set py3.6 to 3.6.12 (latest with major version 3 and minor version 6)
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# - Set py3.10 to 3.10.1 (latest, and only python with major version 3 and minor version 10)
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# Define all wanted aliases for a given python version
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# $1 - full valid pyenv python version (for example '3.6.12', `3.11-dev`, or `pypy3.6-7.2.0-src`)
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# $2 - version used in the alias (for example '3.6', '3', or even '', but also `pypy3.7`, ...)
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define_aliases() {
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version="$1"
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alias_version="$2"
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cmd_prefix="PYENV_VERSION=$version"
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alias "py$alias_version=$cmd_prefix python"
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alias "ipy$alias_version=$cmd_prefix ipython"
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alias "bpy$alias_version=$cmd_prefix bpython"
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alias "pydoc$alias_version=$cmd_prefix pydoc"
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alias "pytest$alias_version=$cmd_prefix pytest"
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}
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# Handle splitting full version into prefix, version number and suffix
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# Because of the huge variaty of python implemenations and their different namings,
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# this function will only be able to handle the default CPython version names,
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# which follow the regex pattern of: '\d+\.\d+\.\d+', the rest will print 'full_version;;'
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# In the future, this may also include support for some other naming schemes.
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# $1 - full valid pyenv python version (for example '3.6.12', `3.11-dev`, or `pypy3.6-7.2.0-src`)
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parse_python_version() {
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full_version="$1"
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if echo "$full_version" | grep -E "[0-9]+\.[0-9]+\.[0-9]+" >/dev/null; then
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echo ";$full_version;"
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else
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echo ';;'
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fi
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}
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# Prints version number extracted from alias for given version
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# $1 - version used in the alias (for example '3.6', '3', or even '', but also 'pypy3.6', ...)
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get_alias_version() {
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alias_version="$1"
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definition="$(alias "py$alias_version")"
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full_version="$(echo "$definition" | cut -d= -f3 | cut -d' ' -f1)"
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version_info="$(parse_python_version "$full_version")"
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version="$(echo "$version_info" | cut -d';' -f2)"
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echo "$version"
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}
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# Compares 2 python versions in major, minor and micro parts
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# $1 - version #1
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# $2 - version #2
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# Returns:
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# 0 - version #1 is newer
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# 1 - version #2 is newer
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# 2 - versions are equal
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version_compare() {
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version_1="$1"
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version_2="$2"
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# ZSH Only:
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version_1=(${(@s:.:)version_1})
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version_2=(${(@s:.:)version_2})
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major_1=$version_1[1]
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major_2=$version_2[1]
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minor_1=$version_1[2]
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minor_2=$version_2[2]
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micro_1=$version_1[3]
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micro_2=$version_2[3]
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# POSIX, but slow:
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# major_1="$(echo "$version_1" | cut -d. -f1)"
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# major_2="$(echo "$version_2" | cut -d. -f1)"
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# minor_1="$(echo "$version_1" | cut -d. -f2)"
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# minor_2="$(echo "$version_2" | cut -d. -f2)"
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# micro_1="$(echo "$version_1" | cut -d. -f3)"
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# micro_2="$(echo "$version_2" | cut -d. -f3)"
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# Compare majors
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if [ $major_1 -gt $major_2 ]; then
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# version 1's major is bigger, version 1 is newer
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return 0
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elif [ $major_1 -lt $major_2 ]; then
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# version 1's major is smaller, version 2 is newer
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return 1
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fi
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# Majors equal, compare minors
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if [ $minor_1 -gt $minor_2 ]; then
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# version 1's minor is bigger, version 1 is newer
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return 0
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elif [ $minor_1 -lt $minor_2 ]; then
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# version 1's major is smaller, version 2 is newer
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return 1
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fi
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# Minors equal, compare micros
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if [ $micro_1 -gt $micro_2 ]; then
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# version 1's micro is bigger, version 1 is newer
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return 0
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elif [ $micro_1 -lt $micro_2 ]; then
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# version 1's micro is smaller, version 2 is newer
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return 1
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fi
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# Micros equal, versions equal
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return 2
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}
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# Define new aliases if they don't already exsist, in which case override
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# if the current version is newer than the version in the alias
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# $1 - full valid pyenv python version (for example '3.6.12', `3.11-dev`, or `pypy3.6-7.2.0-src`)
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# $2 - version used in the alias (for example '3.6', '3', or even '', but also `pypy3.7`, ...)
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try_define_aliases() {
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version="$1"
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alias_version="$2"
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# Check if alias already exists
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if alias "py$alias_version" >/dev/null; then
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# Compare version from the existing alias with current version,
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# if current is newer, override the existing alias(es)
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defined_version="$(get_alias_version "$alias_version")"
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if version_compare "$version" "$defined_version"; then
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define_aliases "$version" "$alias_version"
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# echo "Overwrote '$alias_version' aliases to point to '$version'"
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return 0
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else
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return 1
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fi
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fi
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# The aliases aren't already defined, it's safe to create them
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define_aliases "$version" "$alias_version"
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# echo "Made '$alias_version' aliases pointing to '$version'"
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return 0
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}
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define_version_aliases() {
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prefix="$1"
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version="$2"
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suffix="$3"
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# ZSH only:
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version_data=(${(@s:.:)version})
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major_version=$version_data[0]
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minor_version=$version_data[1]
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# POSIX, but slow:
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# major_version="$(echo "$version" | cut -d. -f1)"
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# minor_version="$(echo "$version" | cut -d. -f2)"
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# Define the major.minor.micro (full) alias
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try_define_aliases "$version" "$prefix$version$suffix"
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# Define the major.minor alias
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try_define_aliases "$version" "$prefix$major_version.$minor_version$suffix"
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# Define the major alias
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try_define_aliases "$version" "$prefix$major_version$suffix"
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# Define top level alias
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try_define_aliases "$version" "$prefix$suffix"
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}
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for python_dir in "$PYENV_ROOT"/versions/*/ ; do
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full_version="$(basename $python_dir)"
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version_info="$(parse_python_version "$full_version")"
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if [ $version_info = ';;' ]; then
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# Version info wasn't obtained successfully, skip this version
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echo "Skipped $full_version"
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continue
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fi
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# ZSH only:
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version_data=(${(@s:;:)version_info})
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prefix=$version_data[0]
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version=$version_data[1]
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suffix=$version_data[2]
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# POSIX, but slow:
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# prefix="$(echo "$version_info" | cut -d';' -f1)"
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# version="$(echo "$version_info" | cut -d';' -f2)"
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# suffix="$(echo "$version_info" | cut -d';' -f3)"
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# startTime=$(date +%N)
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define_version_aliases "$prefix" "$version" "$suffix"
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# endTime=$(date +%N)
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# nanos="$(expr $endTime - $startTime)"
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# echo "took $(expr $nanos / 1000000) miliseconds"
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done
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if command -v poetry >/dev/null 2>&1; then
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alias poetry-pyenv='poetry env use "$(pyenv which python)" && poetry install'
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fi
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