refactor(installer): reuse timestamp for backup naming loop

Co-authored-by: robbyrussell <257+robbyrussell@users.noreply.github.com>

plugins/jj/README.md

@@ -19,35 +19,54 @@ plugins=(... jj)
 | jjbd   | `jj bookmark delete`          |
 | jjbf   | `jj bookmark forget`          |
 | jjbl   | `jj bookmark list`            |
+| jjblt  | `jj bookmark list --tracked`  |
 | jjbm   | `jj bookmark move`            |
 | jjbr   | `jj bookmark rename`          |
 | jjbs   | `jj bookmark set`             |
 | jjbt   | `jj bookmark track`           |
 | jjbu   | `jj bookmark untrack`         |
 | jjc    | `jj commit`                   |
+| jjcfg  | `jj config`                   |
+| jjcfgl | `jj config list`              |
 | jjcmsg | `jj commit --message`         |
 | jjd    | `jj diff`                     |
 | jjdmsg | `jj desc --message`           |
 | jjds   | `jj desc`                     |
+| jjdst  | `jj diff --stat`              |
 | jje    | `jj edit`                     |
+| jjev   | `jj evolog`                   |
+| jjf    | `jj file`                     |
+| jjfl   | `jj file list`                |
+| jjg    | `jj git`                      |
 | jjgcl  | `jj git clone`                |
 | jjgf   | `jj git fetch`                |
 | jjgfa  | `jj git fetch --all-remotes`  |
+| jjgi   | `jj git init`                 |
 | jjgp   | `jj git push`                 |
 | jjgpa  | `jj git push --all`           |
 | jjgpd  | `jj git push --deleted`       |
 | jjgpt  | `jj git push --tracked`       |
+| jjgrl  | `jj git remote list`          |
 | jjl    | `jj log`                      |
 | jjla   | `jj log -r "all()"`           |
 | jjn    | `jj new`                      |
 | jjnt   | `jj new "trunk()"`            |
+| jjop   | `jj op`                       |
+| jjopl  | `jj op log`                   |
+| jjor   | `jj op restore`               |
 | jjrb   | `jj rebase`                   |
 | jjrbm  | `jj rebase -d "trunk()"`      |
 | jjrs   | `jj restore`                  |
 | jjrt   | `cd "$(jj root \|\| echo .)"` |
+| jjs    | `jj show`                     |
 | jjsp   | `jj split`                    |
 | jjsq   | `jj squash`                   |
 | jjst   | `jj status`                   |
+| jju    | `jj undo`                     |
+| jjw    | `jj workspace`                |
+| jjwa   | `jj workspace add`            |
+| jjwf   | `jj workspace forget`         |
+| jjwl   | `jj workspace list`           |
 
 ## Prompt usage
 

plugins/jj/jj.plugin.zsh

@@ -45,34 +45,51 @@ alias jjbc='jj bookmark create'
 alias jjbd='jj bookmark delete'
 alias jjbf='jj bookmark forget'
 alias jjbl='jj bookmark list'
+alias jjblt='jj bookmark list --tracked'
 alias jjbm='jj bookmark move'
 alias jjbr='jj bookmark rename'
 alias jjbs='jj bookmark set'
 alias jjbt='jj bookmark track'
 alias jjbu='jj bookmark untrack'
 alias jjc='jj commit'
+alias jjcfg='jj config'
+alias jjcfgl='jj config list'
 alias jjcmsg='jj commit --message'
 alias jjd='jj diff'
 alias jjdmsg='jj desc --message'
 alias jjds='jj desc'
+alias jjdst='jj diff --stat'
 alias jje='jj edit'
+alias jjev='jj evolog'
+alias jjf='jj file'
+alias jjfl='jj file list'
+alias jjg='jj git'
 alias jjgcl='jj git clone'
 alias jjgf='jj git fetch'
 alias jjgfa='jj git fetch --all-remotes'
+alias jjgi='jj git init'
 alias jjgp='jj git push'
 alias jjgpa='jj git push --all'
 alias jjgpd='jj git push --deleted'
 alias jjgpt='jj git push --tracked'
+alias jjgrl='jj git remote list'
 alias jjl='jj log'
 alias jjla='jj log -r "all()"'
 alias jjn='jj new'
 alias jjnt='jj new "trunk()"'
+alias jjop='jj op'
+alias jjopl='jj op log'
+alias jjor='jj op restore'
 alias jjrb='jj rebase'
 alias jjrbm='jj rebase -d "trunk()"'
 alias jjrs='jj restore'
 alias jjrt='cd "$(jj root || echo .)"'
+alias jjs='jj show'
 alias jjsp='jj split'
 alias jjsq='jj squash'
 alias jjst='jj status'
+alias jju='jj undo'
+alias jjw='jj workspace'
 alias jjwa='jj workspace add'
 alias jjwf='jj workspace forget'
+alias jjwl='jj workspace list'

tools/install.sh

@@ -370,6 +370,7 @@ setup_zshrc() {
       # Ask user for confirmation before backing up and overwriting
       echo "${FMT_YELLOW}Found ${zdot}/.zshrc."
       echo "The existing .zshrc will be backed up to .zshrc.pre-oh-my-zsh if overwritten."
+      echo "Your command history will be backed up too, since replacing .zshrc drops any SAVEHIST you had set."
       echo "Make sure your .zshrc contains the following minimal configuration if you choose not to overwrite it:${FMT_RESET}"
       echo "----------------------------------------"
       cat "$ZSH/templates/minimal.zshrc"
@@ -398,6 +399,44 @@ setup_zshrc() {
     fi
     echo "${FMT_GREEN}Backing up to ${OLD_ZSHRC}${FMT_RESET}"
     mv "$zdot/.zshrc" "$OLD_ZSHRC"
+
+    # The .zshrc we just moved aside is where the user's SAVEHIST lived. Without
+    # it zsh trims $HISTFILE the next time a shell exits, so copy the history
+    # while it is still intact. $HISTFILE is a zsh variable we cannot read from
+    # here, so cover both locations it is commonly given: /etc/zshrc on macOS
+    # sets ${ZDOTDIR:-$HOME}/.zsh_history, and lib/history.zsh falls back to
+    # $HOME/.zsh_history.
+    hist_backed_up=""
+    for hist in "$zdot/.zsh_history" "$HOME/.zsh_history"; do
+      if [ ! -f "$hist" ]; then
+        continue
+      fi
+      case " $hist_backed_up " in
+        *" $hist "*) continue ;;
+      esac
+      hist_backup_base="${hist}.pre-oh-my-zsh"
+      hist_backup="$hist_backup_base"
+      if [ -e "$hist_backup" ]; then
+        hist_backup_ts="$(date +%Y-%m-%d_%H-%M-%S)"
+        hist_backup_i=0
+        while [ -e "$hist_backup" ]; do
+          hist_backup_i=$((hist_backup_i + 1))
+          hist_backup="${hist_backup_base}-${hist_backup_ts}-${hist_backup_i}"
+        done
+      fi
+      if cp -p "$hist" "$hist_backup"; then
+        echo "${FMT_GREEN}Backing up your command history to ${hist_backup}${FMT_RESET}"
+        hist_backed_up="$hist_backed_up $hist"
+      else
+        # a half-written file would look like a usable backup
+        rm -f "$hist_backup"
+        fmt_error "could not back up $hist"
+        if ! mv "$OLD_ZSHRC" "$zdot/.zshrc"; then
+          fmt_error "could not restore $zdot/.zshrc from backup"
+        fi
+        exit 1
+      fi
+    done
   fi
 
   echo "${FMT_GREEN}Using the Oh My Zsh template file and adding it to $zdot/.zshrc.${FMT_RESET}"