initial commit

1 files changed, 79 insertions, 0 deletions

diff --git a/info.go b/info.go
new file mode 100644
index 0000000..17b6b13
--- /dev/null
+++ b/info.go
@@ -0,0 +1,79 @@
+package main
+
+import (
+	"encoding/json"
+	"os/exec"
+	"strings"
+	"bytes"
+)
+
+type FormulaInfo struct {
+	Name     string `json:"name"`
+	Desc     string `json:"desc"`
+	Homepage string `json:"homepage"`
+	License  string `json:"license"`
+	Versions struct {
+		Stable string `json:"stable"`
+	} `json:"versions"`
+	Installed []struct {
+		Version               string `json:"version"`
+		InstalledAsDependency bool   `json:"installed_as_dependency"`
+		InstalledOnRequest    bool   `json:"installed_on_request"`
+	} `json:"installed"`
+	Outdated bool `json:"outdated"`
+}
+
+type CaskInfo struct {
+	Token       string   `json:"token"`
+	Name        []string `json:"name"`
+	Desc        string   `json:"desc"`
+	Homepage    string   `json:"homepage"`
+	Installed   string   `json:"installed"`
+	AutoUpdates bool     `json:"auto_updates"`
+	Outdated    bool     `json:"outdated"`
+	Version     string   `json:"version"`
+}
+
+// GetInfo fetches package info for both formulae and casks.
+// It returns one of the two structs depending on the package type.
+func GetInfo(pkg string) (*FormulaInfo, *CaskInfo, error) {
+	out, err := exec.Command("brew", "info", "--json=v2", pkg).Output()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var data struct {
+		Formulae []FormulaInfo `json:"formulae"`
+		Casks    []CaskInfo    `json:"casks"`
+	}
+
+	if err := json.Unmarshal(out, &data); err != nil {
+		return nil, nil, err
+	}
+
+	if len(data.Formulae) > 0 {
+		return &data.Formulae[0], nil, nil
+	}
+	if len(data.Casks) > 0 {
+		return nil, &data.Casks[0], nil
+	}
+
+	return nil, nil, nil // not found
+}
+
+func GetReverseDependencies(pkg string) ([]string, error) {
+	cmd := exec.Command("brew", "uses", "--installed", pkg)
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	// Each line is a formula name
+	lines := strings.Split(strings.TrimSpace(out.String()), "\n")
+	if len(lines) == 1 && lines[0] == "" {
+		return []string{}, nil
+	}
+
+	return lines, nil
+}