im: screenshot wrapper

1 files changed, 72 insertions, 0 deletions

diff --git a/dot/local/bin/im b/dot/local/bin/im
new file mode 100644
index 0000000..88b9cb1
--- /dev/null
+++ b/dot/local/bin/im
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+# A screen-grab will be saved in $SCREEN_GRAB_DEST_DIR if set, otherwise
+# in $HOME/screen_grab/ if it exsts; otherwise $HOME.
+
+default_basename=screen_grab
+default_extension=png
+date_format=+%F_%H%M%S
+
+chdir_to_destination()
+{
+        local d
+        d=$HOME/$default_basename
+        if [ "$SCREEN_GRAB_DEST_DIR" ]
+        then cd "$SCREEN_GRAB_DEST_DIR"
+        elif [ -d "$d" ]
+        then cd "$d"
+        else cd
+        fi
+}
+
+choose_destination()
+{
+        local stamp basename extension now
+        case $# in
+                1) ;;
+                0) now=$(date "$date_format")
+                   DESTINATION=$default_basename.$now.$default_extension
+                   return
+                   ;;
+                *) return 1 ;;
+        esac
+
+        case "$1" in
+        *.*)
+                basename=${1%.*}
+                extension=${1##*.}
+                ;;
+        *)
+                basename=$1
+                extension=$default_extension
+                ;;
+        esac
+        DESTINATION=$basename.$extension
+}
+
+get_out_the_way()
+{
+        local stamp basename extension destination
+        [ -e "$1" ] || return 0
+
+        stamp=$(date -r "$1" "$date_format") || return
+        case "$1" in
+        *.*)
+                basename=${1%.*}
+                extension=${1##*.}
+                destination=$basename.$stamp.$extension
+                ;;
+        *)
+                destination=$1.$stamp
+                ;;
+        esac
+        [ ! -e "$destination" ] || return
+        mv "$1" "$destination"
+}
+
+set -e
+
+chdir_to_destination
+choose_destination "$@"
+get_out_the_way "$DESTINATION"
+exec import "$DESTINATION"