From 0ecfe53b2d271133fac36de11ecfc0f7e47840f0 Mon Sep 17 00:00:00 2001
From: "Douglas B. Rumbaugh" <doug@douglasrumbaugh.com>
Date: Sat, 6 Jun 2026 12:27:03 -0400
Subject: Initial version complete

I dusted this off after years and had Claude finish
it for me.

caveat emptor: this is largely (though not entirely)
LLM generated as of this commit
---
 ves-var-add.sh | 93 +++++++++++++++++++++++++++++-----------------------------
 1 file changed, 47 insertions(+), 46 deletions(-)

(limited to 'ves-var-add.sh')

diff --git a/ves-var-add.sh b/ves-var-add.sh
index d36647c..01bc457 100755
--- a/ves-var-add.sh
+++ b/ves-var-add.sh
@@ -1,78 +1,79 @@
 #!/bin/sh
+#
+# Prepend an entry to a path-like (:-delimited) variable within an sh-ves
+# environment, or append it with --append. Values not beginning with / or
+# ./ are expanded relative to the sh-ves data directories (see
+# _shves_expand_path). If the target environment is currently active, the
+# variable is also updated in the live shell.
+#
 ves_var_add() {
-    if [ "$#" -lt 2 ]; then
-        printf "ERROR: Insufficient arguments provided.\n"
-        return 2
-    fi
-
     env=""
+    append=0
 
     while :; do
         case $1 in
             --env=*)
-                env=$( echo $1 | cut -d "=" -f 2 )
+                env="${1#--env=}"
                 shift
-                break
                 ;;
-            --)
+            --append)
+                append=1
                 shift
-                break
-                ;;
-
-            -?*)
-                printf "ERROR: Invalid option [%s]\n" $1 > /dev/stderr
-                return 2
                 ;;
-
             *)
                 break
+                ;;
         esac
-        shift
     done
 
-    active_env=0
-    if [ -z "$env" ]; then
-        if ! [ -z "$SHVES_ENV_NM"]; then
-            env="$SHVES_ENV_NM"
-            active_env=1
-        else
-            printf "ERROR: No valid environment active or specified\n" > /dev/stderr
-            return 1
-        fi
+    if [ "$#" -lt 2 ]; then
+        printf "ERROR: Insufficient arguments. usage: ves var-add [--env=<name>] <variable> <value>\n" >&2
+        return 2
     fi
 
-    if ! _shves_check_env_name "$env"; then
+    var="$1"
+    value="$2"
+
+    if ! env=$(_shves_resolve_env "$env"); then
         return 1
     fi
 
-    if ! _shves_check_env_exists "$env"; then
-        return 1;
+    if ! _shves_check_var_name "$var"; then
+        return 1
+    fi
+
+    value=$(_shves_expand_path "$var" "$value")
+
+    # Get the current value from the environment file and prepend the new
+    # entry to it. If the variable is not stored in the environment at all,
+    # seed it from the live shell value first, so that prepending to PATH
+    # and friends never truncates them. An explicitly stored empty value
+    # (as created by ves create --override) is respected, however.
+    fname="$SHVES_ENV_DIR/$env"
+    if _shves_has_var "$fname" "$var"; then
+        var_value=$(_shves_get_var "$fname" "$var")
+    else
+        # Read the live shell value of the variable named in $var,
+        # defaulting to empty if it is unset. For $var = PATH, this
+        # expands to: var_value=${PATH:-}
+        eval "var_value=\${$var:-}"
     fi
 
-    # First, we will get the variable value from the environment file and 
-    # create our new version of it.
-    fname="$SHVES_ENV_DIR"/"$env"
-    var_value=$(grep "export_var:$var=" $SHVES_ENV_DIR/test2 | cut -d '=' -f 2)
     if [ -z "$var_value" ]; then
-        var_value="$2"
+        var_value="$value"
+    elif [ "$append" -eq 1 ]; then
+        var_value="$var_value:$value"
     else
-        var_value="$var_value:$2"
+        var_value="$value:$var_value"
     fi
 
-    # And then update the file to use the new version.
-    sed -i "s/export_var:$var=.*"/export_var:$var=$var_value"/" "$fname"
+    _shves_set_var "$fname" "$var" "$var_value"
 
     # If we are updating the currently active environment, export the
-    # new value as well,
-    if [ $active_env -eq 1 ]; then
-        export "$var"="$var_value"
+    # new value as well.
+    if [ "$env" = "$SHVES_ENV_NM" ]; then
+        _shves_live_export "$var" "$var_value"
     fi
 
-    # Ah, bash would have made this so much nicer... alas
-    # if [ -z ${!1+x} ]; then ...
-#    if [ "$active_env" -eq 1 ] && eval [ -z \${$1+x} ]; then
-#        printf "ERROR: Specified variable [%s] does not exist in environment.\n" $1 > /dev/stderr
-#        printf "\tYou can create it with\n\t ves export %s\n " $1 > /dev/stderr
-#        return 2
-#    fi
+    return 0
 }
-- 
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