From c06d9f9c944a3dfed5352404cc8e8fea6b5359a8 Mon Sep 17 00:00:00 2001
From: carlfriedrich <carlfriedrich@posteo.de>
Date: Sun, 29 Dec 2024 13:13:01 +0100
Subject: [PATCH] Add forgit show command

---
 bin/git-forgit | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/bin/git-forgit b/bin/git-forgit
index 4aebe59a..0dabad6f 100755
--- a/bin/git-forgit
+++ b/bin/git-forgit
@@ -339,6 +339,65 @@ _forgit_diff() {
     return $fzf_exit_code
 }
 
+_forgit_exec_show() {
+    _forgit_show_git_opts=()
+    _forgit_parse_array _forgit_show_git_opts "$FORGIT_SHOW_GIT_OPTS"
+    git show --pretty="" --diff-merges=first-parent --color=always "${_forgit_show_git_opts[@]}" "$@"
+}
+
+_forgit_show_view() {
+    local input_line=$1
+    local diff_context=$2
+    local commit=$3
+    local repo
+    repo=$(git rev-parse --show-toplevel)
+    cd "$repo" || return 1
+    echo "$input_line" | _forgit_get_files_from_diff_line | xargs -0 \
+        "$FORGIT" exec_show "${commit}" -U"$diff_context" -- | _forgit_pager diff
+}
+
+_forgit_show_enter() {
+    file=$1
+    commit=$2
+    _forgit_show_view "$file" "$_forgit_fullscreen_context" "${commit}"
+}
+
+# git show viewer
+_forgit_show() {
+    _forgit_inside_work_tree || return 1
+    local files opts commit escaped_commit
+    files=()
+    if [[ $# -ne 0 ]]; then
+        if git rev-parse "$1" -- &>/dev/null ; then
+            commit="$1" && files=("${@:2}")
+        else
+            commit="HEAD" && files=("$@")
+        fi
+    else
+        commit="HEAD"
+    fi
+    # Escape opening brackets to support stashes (see comment in _forgit_diff)
+    escaped_commit=${commit//\{/\\\\\{}
+    opts="
+        $FORGIT_FZF_DEFAULT_OPTS
+        +m -0 --bind=\"enter:execute($FORGIT show_enter {} $escaped_commit | $FORGIT pager enter)\"
+        --preview=\"$FORGIT show_view {} '$_forgit_preview_context' $escaped_commit\"
+        --bind=\"alt-e:execute-silent($FORGIT edit_diffed_file {})+refresh-preview\"
+        $FORGIT_DIFF_FZF_OPTS
+        --prompt=\"${commit} > \"
+    "
+    _forgit_show_git_opts=()
+    _forgit_parse_array _forgit_show_git_opts "$FORGIT_SHOW_GIT_OPTS"
+    git show --pretty="" --name-status --diff-merges=first-parent "${_forgit_show_git_opts[@]}" "${commit}" -- "${files[@]}" |
+        sed -E 's/^([[:alnum:]]+)[[:space:]]+(.*)$/[\1]	\2/' |
+        sed 's/	/  ->  /2' | expand -t 8 |
+        FZF_DEFAULT_OPTS="$opts" fzf
+    fzf_exit_code=$?
+    # exit successfully on 130 (ctrl-c/esc)
+    [[ $fzf_exit_code == 130 ]] && return 0
+    return $fzf_exit_code
+}
+
 _forgit_add_preview() {
     file=$(echo "$1" | _forgit_get_single_file_from_add_line)
     if (git status -s -- "$file" | grep '^??') &>/dev/null; then  # diff with /dev/null for untracked files
@@ -1021,6 +1080,7 @@ public_commands=(
     "rebase"
     "reset_head"
     "revert_commit"
+    "show"
     "stash_show"
     "stash_push"
 )
@@ -1035,10 +1095,13 @@ private_commands=(
     "cherry_pick_preview"
     "clean_preview"
     "diff_enter"
+    "exec_show"
     "file_preview"
     "ignore_preview"
     "revert_preview"
     "reset_head_preview"
+    "show_enter"
+    "show_view"
     "stash_push_preview"
     "stash_show_preview"
     "yank_sha"