icy does git — dotfiles: d6cd817f7f22581b1f0139add21d1eb787350faf

Rewrite prompt in Go

Anirudh Oppiliappan x@icyphox.sh

Sun, 08 Aug 2021 11:17:00 +0530

commit

d6cd817f7f22581b1f0139add21d1eb787350faf

parent

d7b391845abc7e97f2b1b96c34b4b1789b2ab541

6 files changed, 235 insertions(+), 56 deletions(-)

jump to

.gitignore

bash/.bashrc.d/99-prompt.bash

prompt/git.go

prompt/go.mod

prompt/go.sum

prompt/prompt.go

M .gitignore → .gitignore

@@ -12,3 +12,5 @@ config/fish/functions/_nvm_list.fish
 config/fish/functions/_nvm_version_activate.fish
 config/fish/functions/_nvm_version_deactivate.fish
 config/fish/functions/nvm.fish
+
+prompt/prompt

M bash/.bashrc.d/99-prompt.bash → bash/.bashrc.d/99-prompt.bash

@@ -1,59 +1,4 @@
-red="\e[31m"
-grn="\e[32m"
-ylw="\e[33m"
-cyn="\e[36m"
-blu="\e[34m"
-prp="\e[35m"
-bprp="\e[35;1m"
-gry="\e[94m"
-rst="\e[0m"
-
-git_branch() {
-    [[ "$(git rev-parse --is-inside-work-tree 2> /dev/null)" = "true" ]] && {
-        local git_status="$(git status 2> /dev/null)"
-        local on_branch="On branch ([^${IFS}]*)"
-        local on_commit="HEAD detached at ([^${IFS}]*)"
-        status="$(git status --porcelain 2> /dev/null)"
-        local exit="$?"
-
-        if [[ "$exit" -eq 0 ]]; then
-            if [[ "${#status}" -eq 0 ]]; then
-                color="${grn}"
-                sym="•"
-            else
-                color="${red}"
-                sym="×"
-            fi
-        else
-            printf ''
-        fi
-
-
-        if [[ $git_status =~ $on_branch ]]; then
-            local branch=${BASH_REMATCH[1]}
-            printf '%b'  " ($branch $color$sym$rst)"
-        elif [[ $git_status =~ $on_commit ]]; then
-            local commit=${BASH_REMATCH[1]}
-            printf '%b' " ($commit $color$sym$rst)"
-        fi
-    }
-}
-
-short_pwd() {
-    wd=$(dirs +0)
-    sed 's:\([^/]\)[^/]*/:\1/:g' <<< "${wd/#$HOME/\~}"
-}
-
-prompt_pwd() {
-    printf '%b' "\001${cyn}\002$(short_pwd)\001${rst}\002"
-}
-
-rootornot() {
-    [[ "$(id -u)" -eq 0 ]] &&
-        printf '%b' "\001${red}\002#\001${rst}\002"
-}
-
-PS1='\n$(prompt_pwd)$(git_branch)\n▲$(rootornot) '
+PS1='$(~/dotfiles/prompt/prompt) '
 PS2="> "
 
 # terminal title

A prompt/git.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/go-git/go-git/v5"
+)
+
+// Recursively traverse up until we find .git
+// and return the git repo path.
+func getGitDir() string {
+	cwd, _ := os.Getwd()
+	for {
+		dirs, _ := os.ReadDir(cwd)
+		for _, d := range dirs {
+			if ".git" == d.Name() {
+				return cwd
+			} else if cwd == "/" {
+				return ""
+			}
+		}
+		cwd = filepath.Dir(cwd)
+	}
+	return ""
+}
+
+// Returns the current git branch or current ref sha.
+func gitBranch(repo *git.Repository) string {
+	h, _ := repo.Head()
+	head := h.Strings()[0]
+	sha := h.Strings()[1]
+	if branch := filepath.Base(head); branch != "HEAD" {
+		return branch
+	} else {
+		// Detached HEAD state.
+		return sha[:7]
+	}
+	return ""
+}
+
+// Returns • if clean, else ×.
+func gitStatus(repo *git.Repository) string {
+	worktree, _ := repo.Worktree()
+	status, _ := worktree.Status()
+	if status.IsClean() {
+		return green("•")
+	}
+	return red("×")
+}

A prompt/go.mod

@@ -0,0 +1,5 @@
+module git.icyphox.sh/dotfiles/prompt
+
+go 1.16
+
+require github.com/go-git/go-git/v5 v5.4.2

A prompt/go.sum

@@ -0,0 +1,101 @@
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+github.com/Microsoft/go-winio v0.4.16 h1:FtSW/jqD+l4ba5iPBj9CODVtgfYAD8w2wS923g/cFDk=
+github.com/Microsoft/go-winio v0.4.16/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
+github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7 h1:YoJbenK9C67SkzkDfmQuVln04ygHj3vjZfd9FL+GmQQ=
+github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
+github.com/acomagu/bufpipe v1.0.3 h1:fxAGrHZTgQ9w5QqVItgzwj235/uYZYgbXitB+dLupOk=
+github.com/acomagu/bufpipe v1.0.3/go.mod h1:mxdxdup/WdsKVreO5GpW4+M/1CE2sMG4jeGJ2sYmHc4=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
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A prompt/prompt.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/go-git/go-git/v5"
+)
+
+const (
+	promptSym = "▲"
+)
+
+var (
+	red   = color("\033[31m%s\033[0m")
+	green = color("\033[32m%s\033[0m")
+	cyan  = color("\033[36m%s\033[0m")
+)
+
+func color(s string) func(...interface{}) string {
+	return func(args ...interface{}) string {
+		return fmt.Sprintf(s, fmt.Sprint(args...))
+	}
+}
+
+// Truncates the current working directory:
+//   /home/icy/foo/bar -> ~/f/bar
+func trimPath(cwd, home string) string {
+
+	var path string
+	if strings.HasPrefix(cwd, home) {
+		path = "~" + strings.TrimPrefix(cwd, home)
+	} else {
+		// If path doesn't contain $HOME, return the
+		// entire path as is.
+		path = cwd
+		return path
+	}
+	items := strings.Split(path, "/")
+	truncItems := []string{}
+	for i, item := range items {
+		if i == (len(items) - 1) {
+			truncItems = append(truncItems, item)
+			break
+		}
+		truncItems = append(truncItems, item[:1])
+	}
+	return filepath.Join(truncItems...)
+}
+
+func makePrompt() string {
+	cwd, _ := os.Getwd()
+	home := os.Getenv("HOME")
+	gitDir := getGitDir()
+	if len(gitDir) > 0 {
+		repo, _ := git.PlainOpen(getGitDir())
+		return fmt.Sprintf(
+			"\n%s (%s %s)\n%s",
+			cyan(trimPath(cwd, home)),
+			gitBranch(repo),
+			gitStatus(repo),
+			promptSym,
+		)
+	}
+	return fmt.Sprintf(
+		"\n%s\n%s",
+		cyan(trimPath(cwd, home)),
+		promptSym,
+	)
+}
+
+func main() {
+	fmt.Println(makePrompt())
+}

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