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|
package planr
import (
"os"
"log"
"path"
"path/filepath"
)
// Standard Directories:
//
// Planr relies on a standard directory structure to resolve paths to source code
// These directories can be overridden via environmental variables //
// Directories:
// - `.` root directory
// - `src` contains source code
// - `planr` contains test metadata (also called configuration directory)
// - `planr/rubric` contains test case configuration
// - `planr/tests` contains source code for test cases
// - `planr/build` contains all files written during the build process (ephemeral)
// Env overrides
const (
ENV_CONFIG_DIR="PLANR_CONFIG_DIR"
ENV_SRC_DIR="PLANR_SRC_DIR"
ENV_BUILD_DIR="PLANR_BUILD_DIR"
)
// Try these search directories
var CONFIG_SEARCH_DIRS = [] string {
"planr",
".planr",
}
// Path are relative to the "planr" project config directory
const (
DEFAULT_PATH_SRC="../src"
DEFAULT_PATH_BUILD="build"
DEFAULT_PATH_RUBRIC="rubric"
DEFAULT_PATH_TESTS="tests"
)
type DirConfig struct {
src string
config string
build string
// Config falls back to the config found in the parent directory if the env variable hasn't been overridden
pdFallback string
}
func dieDirAbsent(name, path string) {
if !directoryExists(path) {
log.Fatalf("Could not find %s directory tried %s", name, path)
}
}
func dirFromEnv(name, env string) *string {
if dir, isSet := os.LookupEnv(env); isSet {
dieDirAbsent(name, dir)
return &dir
}
return nil
}
func (c *DirConfig) SetSrc(srcDir string) {
dieDirAbsent("src", srcDir)
c.src = abs(srcDir)
}
func (c *DirConfig) SetConfig(configDir string) {
dieDirAbsent("planr (config)", configDir)
c.config = abs(configDir)
}
func (c *DirConfig) SetBuild(buildDir string) {
dieDirAbsent("build", buildDir)
c.build = abs(buildDir)
}
func (c *DirConfig) SetConfigFromTree(cdir string) {
var configDir string
found := traverseUp(cdir, func (path string) bool {
for _, dir := range CONFIG_SEARCH_DIRS {
configDir = filepath.Join(path, dir)
if directoryExists(configDir) {
return true
}
}
return false
});
if found {
c.pdFallback = configDir
}
}
func (c DirConfig) Config() string {
if c.config != "" {
return c.config
}
if dir := dirFromEnv("config", ENV_CONFIG_DIR); dir != nil {
c.config = abs(*dir)
return c.config
}
if c.pdFallback == "" {
log.Fatal("Could not find planr directory");
}
c.config = abs(c.pdFallback);
return c.config
}
func (c DirConfig) Src() string {
if c.src != "" {
return c.src
}
if dir := dirFromEnv("src", ENV_SRC_DIR); dir != nil {
c.src = *dir
return c.src
}
// set path relative to config
dir := c.Config()
return path.Join(dir, DEFAULT_PATH_SRC)
}
func abs(path string) string {
apath, err := filepath.Abs(path)
if err != nil {
log.Fatalf("Could not find path %s", path)
}
return apath
}
func (c DirConfig) Build() string {
if c.build != "" {
return c.build
}
if dir := dirFromEnv("build", ENV_BUILD_DIR); dir != nil {
c.build = *dir
return c.build
}
dir := c.Config()
return path.Join(dir, DEFAULT_PATH_BUILD)
}
func (c DirConfig) CleanBuild() {
build := c.Build()
if err := os.RemoveAll(build); err != nil {
log.Fatalf("Cannot build directory %v\n", err)
}
}
func (c DirConfig) MkBuild() {
build := c.Build()
if err := os.Mkdir(build, 0755); err != nil {
log.Fatalf("Could not create build directory %v\n", err)
}
}
func (c DirConfig) Rubric() string {
rubric := path.Join(c.Config(), DEFAULT_PATH_RUBRIC)
dieDirAbsent("rubric", rubric)
return rubric
}
func (c DirConfig) Tests() string {
tests := path.Join(c.Config(), DEFAULT_PATH_TESTS)
dieDirAbsent("tests", tests)
return tests
}
|
