forked from toolshed/abra
decentral1se
1723025fbf
We were running behind and there were quite some deprecations to update. This was mostly in the upstream copy/pasta package but seems quite minimal.
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package terminfo
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import (
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"os"
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"os/user"
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"path"
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"strings"
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"sync"
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)
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// termCache is the terminfo cache.
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var termCache = struct {
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db map[string]*Terminfo
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sync.RWMutex
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}{
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db: make(map[string]*Terminfo),
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}
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// Load follows the behavior described in terminfo(5) to find correct the
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// terminfo file using the name, reads the file and then returns a Terminfo
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// struct that describes the file.
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func Load(name string) (*Terminfo, error) {
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if name == "" {
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return nil, ErrEmptyTermName
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}
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termCache.RLock()
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ti, ok := termCache.db[name]
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termCache.RUnlock()
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if ok {
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return ti, nil
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}
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var checkDirs []string
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// check $TERMINFO
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if dir := os.Getenv("TERMINFO"); dir != "" {
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checkDirs = append(checkDirs, dir)
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}
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// check $HOME/.terminfo
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u, err := user.Current()
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if err != nil {
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return nil, err
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}
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checkDirs = append(checkDirs, path.Join(u.HomeDir, ".terminfo"))
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// check $TERMINFO_DIRS
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if dirs := os.Getenv("TERMINFO_DIRS"); dirs != "" {
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checkDirs = append(checkDirs, strings.Split(dirs, ":")...)
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}
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// check fallback directories
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checkDirs = append(checkDirs, "/etc/terminfo", "/lib/terminfo", "/usr/share/terminfo")
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for _, dir := range checkDirs {
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ti, err = Open(dir, name)
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if err != nil && err != ErrFileNotFound && !os.IsNotExist(err) {
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return nil, err
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} else if err == nil {
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return ti, nil
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}
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}
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return nil, ErrDatabaseDirectoryNotFound
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}
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// LoadFromEnv loads the terminal info based on the name contained in
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// environment variable TERM.
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func LoadFromEnv() (*Terminfo, error) {
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return Load(os.Getenv("TERM"))
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}
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