databricks-cli/python/env.go

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package python
import (
"context"
"encoding/json"
"fmt"
"log"
"strings"
"golang.org/x/mod/semver"
)
type Dependency struct {
Name string
Operator string
Version string
Location string // @ file:///usr/loca
}
func (d Dependency) CanonicalVersion() string {
return semver.Canonical(fmt.Sprintf("v%s", d.Version))
}
type Environment []Dependency
func (e Environment) Has(name string) bool {
for _, d := range e {
if d.Name == name {
return true
}
}
return false
}
func Freeze(ctx context.Context) (Environment, error) {
out, err := Py(ctx, "-m", "pip", "freeze")
if err != nil {
return nil, err
}
env := Environment{}
deps := strings.Split(out, "\n")
for _, raw := range deps {
env = append(env, DependencyFromSpec(raw))
}
return env, nil
}
func DependencyFromSpec(raw string) (d Dependency) {
// TODO: write a normal parser for this
rawSplit := strings.Split(raw, "==")
if len(rawSplit) != 2 {
log.Printf("[DEBUG] Skipping invalid dep: %s", raw)
return
}
d.Name = rawSplit[0]
d.Operator = "=="
d.Version = rawSplit[1]
return
}
// Distribution holds part of PEP426 metadata
// See https://peps.python.org/pep-0426/
type Distribution struct {
Name string `json:"name"`
Version string `json:"version"`
Packages []string `json:"packages"`
InstallRequires []string `json:"install_requires,omitempty"`
}
// InstallEnvironment returns only direct install dependencies
func (d Distribution) InstallEnvironment() (env Environment) {
for _, raw := range d.InstallRequires {
env = append(env, DependencyFromSpec(raw))
}
return
}
// NormalizedName returns PEP503-compatible Python Package Index project name.
// As per PEP 426 the only valid characters in a name are the ASCII alphabet,
// ASCII numbers, ., -, and _. The name should be lowercased with all runs of
// the characters ., -, or _ replaced with a single - character.
func (d Distribution) NormalizedName() string {
// TODO: implement https://peps.python.org/pep-0503/#normalized-names
return d.Name
}
// ReadDistribution "parses" metadata from setup.py file.
func ReadDistribution(ctx context.Context) (d Distribution, err error) {
out, err := PyInline(ctx, `
import setuptools, json, sys
setup_config = {} # actual args for setuptools.dist.Distribution
def capture(**kwargs): global setup_config; setup_config = kwargs
setuptools.setup = capture
import setup
json.dump(setup_config, sys.stdout)`)
if err != nil {
return
}
err = json.Unmarshal([]byte(out), &d)
return
}