diff options
Diffstat (limited to 'vendor/github.com/xo/terminfo/load.go')
-rw-r--r-- | vendor/github.com/xo/terminfo/load.go | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/vendor/github.com/xo/terminfo/load.go b/vendor/github.com/xo/terminfo/load.go new file mode 100644 index 000000000..9b0b94286 --- /dev/null +++ b/vendor/github.com/xo/terminfo/load.go @@ -0,0 +1,72 @@ +package terminfo + +import ( + "os" + "os/user" + "path" + "strings" + "sync" +) + +// termCache is the terminfo cache. +var termCache = struct { + db map[string]*Terminfo + sync.RWMutex +}{ + db: make(map[string]*Terminfo), +} + +// Load follows the behavior described in terminfo(5) to find correct the +// terminfo file using the name, reads the file and then returns a Terminfo +// struct that describes the file. +func Load(name string) (*Terminfo, error) { + if name == "" { + return nil, ErrEmptyTermName + } + + termCache.RLock() + ti, ok := termCache.db[name] + termCache.RUnlock() + + if ok { + return ti, nil + } + + var checkDirs []string + + // check $TERMINFO + if dir := os.Getenv("TERMINFO"); dir != "" { + checkDirs = append(checkDirs, dir) + } + + // check $HOME/.terminfo + u, err := user.Current() + if err != nil { + return nil, err + } + checkDirs = append(checkDirs, path.Join(u.HomeDir, ".terminfo")) + + // check $TERMINFO_DIRS + if dirs := os.Getenv("TERMINFO_DIRS"); dirs != "" { + checkDirs = append(checkDirs, strings.Split(dirs, ":")...) + } + + // check fallback directories + checkDirs = append(checkDirs, "/etc/terminfo", "/lib/terminfo", "/usr/share/terminfo") + for _, dir := range checkDirs { + ti, err = Open(dir, name) + if err != nil && err != ErrFileNotFound && !os.IsNotExist(err) { + return nil, err + } else if err == nil { + return ti, nil + } + } + + return nil, ErrDatabaseDirectoryNotFound +} + +// LoadFromEnv loads the terminal info based on the name contained in +// environment variable TERM. +func LoadFromEnv() (*Terminfo, error) { + return Load(os.Getenv("TERM")) +} |