new package envfile and move GetComposeFiles to recipe package

pkg/envfile/envfile.go

@@ -0,0 +1,97 @@
+package envfile
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+
+	"git.coopcloud.tech/coop-cloud/godotenv"
+	"github.com/sirupsen/logrus"
+)
+
+// envVarModifiers is a list of env var modifier strings. These are added to
+// env vars as comments and modify their processing by Abra, e.g. determining
+// how long secrets should be.
+var envVarModifiers = []string{"length"}
+
+// AppEnv is a map of the values in an apps env config
+type AppEnv = map[string]string
+
+// AppModifiers is a map of modifiers in an apps env config
+type AppModifiers = map[string]map[string]string
+
+// ReadEnv loads an app envivornment into a map.
+func ReadEnv(filePath string) (AppEnv, error) {
+	var envVars AppEnv
+
+	envVars, _, err := godotenv.Read(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	logrus.Debugf("read %s from %s", envVars, filePath)
+
+	return envVars, nil
+}
+
+// ReadEnv loads an app envivornment and their modifiers in two different maps.
+func ReadEnvWithModifiers(filePath string) (AppEnv, AppModifiers, error) {
+	var envVars AppEnv
+
+	envVars, mods, err := godotenv.Read(filePath)
+	if err != nil {
+		return nil, mods, err
+	}
+
+	logrus.Debugf("read %s from %s", envVars, filePath)
+
+	return envVars, mods, nil
+}
+
+// ReadAbraShEnvVars reads env vars from an abra.sh recipe file.
+func ReadAbraShEnvVars(abraSh string) (map[string]string, error) {
+	envVars := make(map[string]string)
+
+	file, err := os.Open(abraSh)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return envVars, nil
+		}
+		return envVars, err
+	}
+	defer file.Close()
+
+	exportRegex, err := regexp.Compile(`^export\s+(\w+=\w+)`)
+	if err != nil {
+		return envVars, err
+	}
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		txt := scanner.Text()
+		if exportRegex.MatchString(txt) {
+			splitVals := strings.Split(txt, "export ")
+			envVarDef := splitVals[len(splitVals)-1]
+			keyVal := strings.Split(envVarDef, "=")
+			if len(keyVal) != 2 {
+				return envVars, fmt.Errorf("couldn't parse %s", txt)
+			}
+			envVars[keyVal[0]] = keyVal[1]
+		}
+	}
+
+	if len(envVars) > 0 {
+		logrus.Debugf("read %s from %s", envVars, abraSh)
+	} else {
+		logrus.Debugf("read 0 env var exports from %s", abraSh)
+	}
+
+	return envVars, nil
+}
+
+type EnvVar struct {
+	Name    string
+	Present bool
+}