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fix: pagination error on Linux
Bury the `more` pager default on Linux in an effort to work around the following problem: https://github.com/cheat/cheat/issues/681#issuecomment-1201842334 We're satisficing for this kludge because it does not appear to be possible to actually make `more` perform as expected in all environments.
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@ -16,7 +16,7 @@ import (
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"github.com/cheat/cheat/internal/installer"
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)
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const version = "4.2.5"
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const version = "4.2.6"
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func main() {
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@ -23,8 +23,7 @@ colorize: false
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# One of: "terminal", "terminal256", "terminal16m"
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formatter: terminal
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# Through which pager should output be piped? (Unset this key for no pager.)
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pager: more
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# Through which pager should output be piped?
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# pager: less -FRX # <- recommended where available
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# The paths at which cheatsheets are available. Tags associated with a cheatpath
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@ -14,8 +14,7 @@ colorize: false
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# One of: "terminal", "terminal256", "terminal16m"
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formatter: terminal
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# Through which pager should output be piped? (Unset this key for no pager.)
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pager: more
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# Through which pager should output be piped?
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# pager: less -FRX # <- recommended where available
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# The paths at which cheatsheets are available. Tags associated with a cheatpath
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@ -131,8 +131,36 @@ func New(opts map[string]interface{}, confPath string, resolve bool) (Config, er
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// attempt to fall back to `PAGER` if a pager is not specified in configs
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conf.Pager = strings.TrimSpace(conf.Pager)
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if conf.Pager == "" && os.Getenv("PAGER") != "" {
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conf.Pager = os.Getenv("PAGER")
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if conf.Pager == "" {
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// look for `pager`, `less`, and `more` on the system PATH
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pagerPath, _ := exec.LookPath("pager")
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lessPath, _ := exec.LookPath("less")
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morePath, _ := exec.LookPath("more")
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// search first for a `PAGER` envvar
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if os.Getenv("PAGER") != "" {
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conf.Pager = os.Getenv("PAGER")
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// search for `pager`
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} else if pagerPath != "" {
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conf.Pager = pagerPath
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// search for `less`
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} else if lessPath != "" {
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conf.Pager = lessPath
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// search for `more`
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//
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// XXX: this causes issues on some Linux systems. See:
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// https://github.com/cheat/cheat/issues/681#issuecomment-1201842334
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//
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// By checking for `more` last, we're hoping to at least mitigate
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// the frequency of this occurrence, because `pager` and `less` are
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// likely to be available on most systems on which a user is likely
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// to have installed `cheat`.
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} else if morePath != "" {
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conf.Pager = morePath
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}
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}
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return conf, nil
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